nix: Skip readLinkAt unit test on XFS builder

CI builds Determinate Nix from source, running its unit-test suite. The
`nix-util` `readLinkAt.works` test creates symlinks with PATH_MAX-length
targets, but our CI runner's build filesystem is XFS, which hard-caps
symlink targets at 1024 bytes (XFS_SYMLINK_MAXLEN). Creation fails with
ENAMETOOLONG, so the test — and the whole determinate-nix build — fails
on the runner while passing on non-XFS filesystems.

Filter out just that test via gtest's GTEST_FILTER on the
`nix-util-tests-run` check input, leaving the rest of the unit and
functional tests gating the build (they still matter, since we build
against several nixpkgs channels).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/settings.json

@@ -0,0 +1,18 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(nix eval:*)",
+      "Bash(nix flake check:*)",
+      "Bash(nix build:*)",
+      "Bash(check-system:*)",
+      "Bash(build-system:*)",
+      "Bash(build-home:*)",
+      "Bash(git status:*)",
+      "Bash(git diff:*)",
+      "Bash(git log:*)",
+      "Bash(git show:*)",
+      "Bash(drill:*)",
+      "Bash(ping:*)"
+    ]
+  }
+}

.claude/skills/upgrade-nixpkgs/SKILL.md

@@ -0,0 +1,25 @@
+---
+name: upgrade-nixpkgs
+description: >-
+  Upgrade all four nixpkgs channels (unstable, stable, mine, mine-stable) and home-manager for this
+  flake: check for a NixOS stable bump, rebase the devplayer0 nixpkgs fork against upstream, run the
+  update commands, sweep version-gated TODOs, and review flake inputs. Use when the user wants to
+  update/bump nixpkgs, refresh the pins, or do the periodic nixpkgs/home-manager upgrade.
+---
+
+# Upgrade nixpkgs
+
+The canonical, agent-agnostic procedure lives in the repo at
+[`docs/nixpkgs-upgrade.md`](../../../docs/nixpkgs-upgrade.md). Read it and follow the phases in
+order.
+
+Key reminders (see the doc for the full steps):
+
+- It is **guided, not automated** — do the mechanical/investigative work but stop at the ⏸ points:
+  pushing the fork, resolving rebase conflicts, editing the `flake.nix` stable pins, and deleting
+  version guards. Report and let the user decide.
+- **Check the current NixOS stable first** (Phase 1) — the fork's `devplayer0-stable` rebase target
+  and the `flake.nix` stable pins must agree on one release.
+- **Re-verify the patch stack against freshly fetched upstream**, not stale refs — enumerate it with
+  `git log`, don't assume a remembered list (stale `upstream/*` refs make already-upstreamed commits
+  masquerade as fork-only patches).

.envrc

@@ -1,2 +1,4 @@
 watch_file devshell/{default,commands,install,vm-tasks}.nix
-use flake
+# --accept-flake-config trusts the flake's nixConfig (our Harmonia cache) non-interactively, so
+# direnv doesn't stall on the trust prompt.
+use flake . --accept-flake-config

.gitea/workflows/ci.yaml

@@ -10,17 +10,22 @@ jobs:
     runs-on: ubuntu-26.04
     steps:
       - uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@v31
+      - uses: DeterminateSystems/determinate-nix-action@v3
         with:
-          # Gitea will supply a token in GITHUB_TOKEN, which this action will
-          # try to pass to Nix when downloading from GitHub
-          github_access_token: ${{ secrets.GH_PULL_TOKEN }}
-          extra_nix_config: |
+          # Gitea will supply a token in GITHUB_TOKEN, which this action passes to
+          # Nix (as access-tokens) when downloading from GitHub
+          github-token: ${{ secrets.GH_PULL_TOKEN }}
+          extra-conf: |
             # Make sure we're using sandbox
             sandbox-fallback = false
             # Big C++ projects fill up memory...
             cores = 6
 
+            # Determinate performance features
+            lazy-trees = true
+            eval-cores = 0
+
+            accept-flake-config = true
             extra-substituters = https://nix-cache.nul.ie
             extra-trusted-public-keys = nix-cache.nul.ie-1:BzH5yMfF4HbzY1C977XzOxoPhEc9Zbu39ftPkUbH+m4=
 

.gitea/workflows/update-docs.yaml

@@ -0,0 +1,51 @@
+name: Update docs
+
+on:
+  push:
+    branches: [master]
+
+jobs:
+  update:
+    if: "!contains(github.event.head_commit.message, 'docs: Update generated references')"
+    runs-on: ubuntu-26.04
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: cachix/install-nix-action@v31
+        with:
+          github_access_token: ${{ secrets.GH_PULL_TOKEN }}
+          extra_nix_config: |
+            extra-substituters = https://nix-cache.nul.ie
+            extra-trusted-public-keys = nix-cache.nul.ie-1:BzH5yMfF4HbzY1C977XzOxoPhEc9Zbu39ftPkUbH+m4=
+
+      - name: Update assignment tables
+        run: nix run .#update-docs-assignments
+
+      - name: Update option reference
+        run: nix run .#update-docs-options
+
+      - name: Update DNS reference
+        run: >
+          nix run .#update-docs-dns --
+          ams1.int.nul.ie
+          100.10.in-addr.arpa
+          2.d.4.0.0.c.7.9.e.0.a.2.ip6.arpa
+          h.nul.ie
+          168.192.in-addr.arpa
+          0.d.4.0.0.c.7.9.e.0.a.2.ip6.arpa
+
+      - name: Commit and push if changed
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+          REPO_URL: ${{ gitea.repositoryUrl }}
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git remote set-url origin "${REPO_URL/https:\/\//https:\/\/oauth2:${GITEA_TOKEN}@}"
+          git add docs/
+          if ! git diff --cached --quiet; then
+            git commit -m "docs: Update generated references"
+            git push
+          fi

.gitignore

@@ -4,3 +4,4 @@ result*
 !/.vms/.gitkeep
 /.keys/*.key
 *.swp
+/.claude/settings.local.json

AGENTS.md

@@ -2,10 +2,28 @@
 
 This file provides guidance to coding agents when working with code in this repository.
 
+`CLAUDE.md` at the repo root is a symlink to this file — edit `AGENTS.md`, not the symlink (some
+tools refuse to write through a symlink and will error on `CLAUDE.md`).
+
+**Prefer this file over agent memory.** When you learn something durable about this repo — a
+convention, a workflow gotcha, a design rationale — record it here (or in a repo doc this file
+points to, e.g. `docs/sites/home/switches.md`), not in agent memory. AGENTS.md is versioned and
+shared; memory is not.
+
+Keep this file lean: it should contain only rules, workflows, safety constraints and sharp gotchas
+an agent needs before starting work. Detailed inventories, topology, service operation and design
+rationale belong in the canonical document under `docs/`; summarize only the essential constraint
+here and link to that document instead of maintaining a second copy.
+
+Claude Code permissions live in two files: `.claude/settings.json` (versioned, shared — the
+committed allow list of safe-to-auto-approve commands) and `.claude/settings.local.json` (personal,
+gitignored — where interactive "always allow" grants accumulate). Put durable, generally-safe
+commands in the shared file; leave one-off or workstation-specific grants in the local one.
+
 ## Overview
 
 Personal Nix flake managing NixOS systems and home-manager configurations for a set of
-machines — always called **"boxes"**, never "fleet". It is built around a **custom module
+**boxes**, never a "fleet". It is built around a **custom module
 system** layered on top of NixOS/home-manager, not the stock flake `nixosConfigurations` pattern.
 
 ## Commands
@@ -28,21 +46,51 @@ Common ones:
   Pass the flake-qualified node, e.g. `deploy .#git`. The deploy node name is **always** the system
   name (`deploy-rs.nix` keys nodes directly off `nixos.systems` / `home-manager.homes`); a system is
   only a deploy target when `config.my.deploy.enable` is true (defaults true; auto-disabled for dev
-  VMs and containers).
+  VMs and containers). A container is **not** its own deploy node — it is generated as a
+  `container-<name>` profile on its **host** node. So `deploy .#<host>` deploys the host's `system`
+  profile and every one of its containers, whereas `deploy .#<host>.container-<name>` targets a
+  single container (e.g. `deploy .#shill.container-middleman`). Pass `--boot` to stage a config as the boot default **without** live-switching
+  (`deploy --boot .#<host>`) — the box keeps running its current generation until it reboots. Use this
+  when a live `switch` would break connectivity mid-change (e.g. a router's WAN VLAN rework), then
+  reboot to cut over.
 - `ssh-machine <name> [cmd]` — SSH to a NixOS system or home-manager config by name. Resolves the
   target and ssh options (identity, port) from its deploy-rs node, so it needs `my.deploy.enable`
   (same gate as `deploy`). Boxes default to the `fish` login shell, so pipe multi-statement remote
   scripts through `bash` (e.g. `ssh-machine <name> bash -s < script.sh`) rather than `&&`/`for`.
+  If outbound SSH hangs at the publickey step (flaky `ssh-agent`), disable the agent for the call:
+  `SSH_AUTH_SOCK= ssh-machine …` (or add `-o IdentityAgent=none` to a raw `ssh`).
 - `ragenix` — edit age secrets using `.keys/dev.key` as identity (see Secrets).
 - `repl` — `nix repl .#`.
-- `update-nixpkgs` / `update-home-manager` — bump pinned inputs.
+- `update-nixpkgs` / `update-home-manager` — bump pinned inputs. For the full periodic upgrade
+  (rebasing the `devplayer0` nixpkgs fork, stable-release bumps, version-gate sweep, input review)
+  follow the guided procedure in [`docs/nixpkgs-upgrade.md`](docs/nixpkgs-upgrade.md).
 
-Check everything (what CI runs): `nix flake check --no-build`.
+Use the narrowest relevant evaluation while iterating: `check-system <host>` for a box config,
+`nix eval .#nixfiles.config.nixos.allAssignments --json` for assignment generation, or
+`nix build --no-link .#nixfiles.config.nixos.optionsDoc` for the option reference. Reserve
+`nix flake check --no-build` for final broad validation or reproducing CI.
 CI builds each attr of `.#ci.x86_64-linux` (systems, homes, packages, shell) and pushes to the
-Harmonia binary cache; see `.gitea/workflows/ci.yaml` and `ci/push-to-cache.sh`.
+Harmonia binary cache; see `.gitea/workflows/ci.yaml` and `ci/push-to-cache.sh`. A separate
+workflow (`.gitea/workflows/update-docs.yaml`) regenerates the network assignments, NixOS option
+reference and live DNS reference under `docs/`.
+
+For DNS lookups use **`drill`** (ldns) — `dig` isn't installed in this environment (it fails with
+exit 127, which is easy to miss if stderr is redirected). E.g. `drill -Q @<resolver> <name> A`.
+
+For privilege escalation use **`doas`**, not `sudo` — the boxes don't install `sudo` (it fails with
+`command not found`). E.g. `doas ip link set <if> up`.
+
+For ad-hoc packages prefer **`pkgs#<name>`** over `nixpkgs#<name>` (e.g. `nix run pkgs#python3`):
+`pkgs` is a system registry alias for the same pinned nixpkgs the boxes are built from, so it
+resolves from the local store instead of fetching a different channel.
 
 ## Architecture
 
+The mechanics in this section have expanded human-readable write-ups under `docs/`:
+`docs/architecture.md` (module system), `docs/networking.md` (assignments, topology, meshes) and
+`docs/deployment.md` (deploy-rs, devshell, secrets, CI). This section stays the terse agent
+version; consult those for depth.
+
 ### The custom module system
 `flake.nix` does **not** call `nixosSystem` per host directly. Instead it `evalModules` over
 `./nixos`, `./home-manager`, `./deploy-rs.nix`, and the per-host files listed in the `configs`
@@ -92,28 +140,33 @@ Per-host configs live under `nixos/boxes/<host>` (some are single `.nix` files,
 with nested VMs/containers under e.g. `colony/vms`). Many "systems" are VMs or containers managed
 via the `vms` / `containers` modules and the `l2mesh` VXLAN module.
 
-### Home routers (`nixos/boxes/home/routing-common`)
-The two home routers, `river` and `stream`, share `routing-common`, which is a **function of an
-`index`** (`import ../../routing-common 0` for river, `1` for stream). The index derives per-box
-addresses, keepalived VRRP priorities/state, DNS `ns` numbering, etc., so the two boxes are an
-active/backup HA pair from one definition. They differ where hardware/uplink differ: `stream` has a
-DHCP WAN, `river` runs PPPoE (`services.pppd`, Digiweb) — box-specific bits live in the respective
-box file, not `routing-common`.
+For a human-readable map of what is actually deployed (per-box roles, services and networking),
+see `README.md` and `docs/` (index at `docs/README.md`; box pages under `docs/sites/`,
+`docs/remote/`, `docs/mobile/`). Keep these in sync when adding, removing or repurposing a box or
+service. The network-assignment tables are consolidated in `docs/networking.md` (one per site,
+CI-generated from `allAssignments` between `<!-- assignments: <site> -->` markers); box pages
+link to that section. Write the prose and let the updater refresh the tables.
 
-- **HA is VRRP (`keepalived`).** Per-VLAN floating **VIPs** (`lib.my.c.home.vips`) are what clients
-  use as both gateway *and* DNS server. `kea` (DHCP) and `radvd` (RAs; started only on the master)
-  hand out the VIP, and `pdns-recursor` binds the VIPs (with `net.ipv*.ip_nonlocal_bind` so the
-  backup can pre-bind). Point client-facing services at the VIP, not a box's real address, so
-  failover follows the master instead of relying on client resolver timeouts.
-- **`wan-online.target`** is a shared abstract target meaning "the public WAN/IPv4 route is up".
-  `routing-common` only declares it; each box wires *how it is reached* (`stream`: a oneshot that
-  waits for the DHCP default route; `river`: the pppd `ip-up`/`ip-down` hooks). Services that need
-  the WAN attach **to** it via `wantedBy` + `partOf` + `after` (not `requires`/`wants`), so an empty
-  target is never pulled in and prematurely activated, and they re-load on WAN flap.
-- networkd helpers used heavily here: `lib.my.networkdAssignment` and `lib.my.mkVLAN` live under
-  **`lib.my`**, while networkd snippet constants like `networkd.noL3` live under **`lib.my.c`** —
-  easy to mix up. Set an interface MTU via the `.network`'s `linkConfig.MTUBytes` (`[Link]`), not
-  `netdevConfig` (`[NetDev]` rejects `MTUBytes`).
+### Home routers (`nixos/boxes/home/routing-common`)
+`river` and `stream` share `routing-common`, a function of an `index`; keep common HA behavior there
+and box-specific WAN behavior in the respective box file. Client-facing gateway and DNS services
+must use the floating VIPs. `routing-common` only declares the inert `wan-online.target`; each box
+wires its own reachability mechanism. See `docs/networking.md#router-ha` and the router box pages
+for the design and operational detail. Keep pair-wide behavior in `docs/networking.md`; router
+pages should document only their WAN, platform and other box-specific responsibilities.
+
+The easy-to-mix-up implementation details are that `lib.my.networkdAssignment` and
+`lib.my.mkVLAN` live under `lib.my`, networkd snippet constants such as `networkd.noL3` live under
+`lib.my.c`, and interface MTU belongs in the `.network`'s `linkConfig.MTUBytes`.
+
+### Home switches (`jim` / `dave` / `brian`)
+These switches are not managed by the flake, and changing them is out-of-band and hard to revert.
+Read `docs/sites/home/switches.md` before WAN or VLAN work, always confirm before applying a switch
+change, and keep the documented layout and `lib.my.c.home.vlans` in sync.
+
+### Home wireless APs (`vibe` / `wave`)
+These APs are not managed by the flake; only their DNS records are. Read and update
+`docs/sites/home/aps.md` when changing an AP or its VLAN layout.
 
 ## Secrets
 
@@ -126,7 +179,14 @@ private keys) is required for editing secrets, deploying, and running dev VMs.
 
 ## Conventions
 
-- Format with `nixpkgs-fmt` (`fmt`). 2-space indent, `inherit (...)` blocks at the top of `let`.
+- Format with `nixpkgs-fmt` (`fmt`). 2-space indent, `inherit (...)` blocks at the top of `let` —
+  prefer `inherit (lib) mkOption ...;` (and bare use) over qualifying inline as `lib.mkOption`.
+  **Ask before running `fmt`** — some files aren't canonically formatted, so `fmt` can reindent a
+  whole file and bury a logical change in whitespace churn. Match the surrounding style by hand and
+  leave formatting to the user unless they ask.
+- Comment where it genuinely aids understanding, but not for trivial/obvious code — match the file's
+  existing (fairly sparse) comment density. When adding something general, comment its general
+  purpose, not the specific change or one-off reason it was introduced for.
 - Prefer `lib.my` helpers (`mkOpt'`, `mkBoolOpt'`, `mkDefault'`) and `lib.my.c` constants over
   reimplementing.
 - New shared functionality → a module in `*/modules/` + entry in `_list.nix`, options under `my.*`.
@@ -135,6 +195,73 @@ private keys) is required for editing secrets, deploying, and running dev VMs.
   as `overlays.default`.
 - In prose and commit messages, quote code-like identifiers (commands, options, paths, package and
   attribute names) in backticks.
-- Call the machines **"boxes"**, never "fleet".
+- Keep docs and prose plain — avoid vague AI-tell filler. In particular use "layout"/"structure"
+  rather than "shape", and "General" rather than "cross-cutting topics"; name things directly
+  instead of reaching for umbrella words.
+- For network connectivity, use the concrete term — "interface", "connection", "network
+  attachment" or the network's name — rather than calling it a "leg".
+- Call the systems **"boxes"**, never "machines" or "fleet", except where "machine" is part of a
+  command, option or upstream technical term such as QEMU's machine type.
 - Commit subjects follow `area/scope: Capitalized summary` (e.g. `nixos/home: ...`); keep logically
-  distinct changes in separate commits.
+  distinct changes in separate commits. Aim for 50-character subjects and do not exceed 72
+  characters. Wrap commit bodies at 72 columns. A concise body describing the change and its
+  rationale is welcome when the subject alone does not provide enough context.
+
+## Documentation
+
+Human-readable docs live under `docs/` (index: `docs/README.md`). Box pages are under
+`docs/sites/<site>/`, `docs/remote/`, `docs/mobile/`. A box that itself hosts sub-systems
+(containers/nested VMs) gets a **directory named for it** with a `README.md` and the child pages
+beneath it (e.g. `shill/README.md` + `shill/containers/*.md`, `sfh/README.md`). When a site and its
+physical box share a name, the site keeps the `README.md` and the box page stays alongside it (for
+example `sites/colony/README.md` and `sites/colony/colony.md`).
+
+**Box page layout** (match the existing pages): H1 + a one-line intro; a short bullet list of
+`Source` / `Host` / `nixpkgs`; an optional hardware inventory or VPS resource-allocation section;
+`## Role`; `## Network assignments` that **links** to
+[`networking.md#box-assignments`](docs/networking.md#box-assignments) (never inline the table); one
+`##` section per topic; `## Notable config files` last. Keep non-hardware platform details in their
+topical sections rather than moving them with the inventory. A box without static assignments still
+gets the section with a short explanation instead of a generated-table link.
+
+**Structure and layout:**
+- Use **tables** for lists of structured items (BGP peers, forwarded ports, vhosts, containers,
+  VMs, VLANs). Make the item **name the link**; don't add a separate `Page`/`Docs` column.
+- Break up **long prose**: any bullet running past ~4 lines over several distinct facts becomes a
+  `###` subheading (lead sentence + nested bullets). Don't leave walls of long bullets.
+- Prefer durable concepts and named configuration identifiers over copying exact numbers that are
+  tunable, generated or likely to drift. Exact values are appropriate when they are useful parts of
+  the inventory or interface: VM resource allocations, hardware-fixed properties, network and
+  protocol identifiers, exposed service ports, and safety or recovery values. Describe mutable
+  implementation tunables by purpose and link to their source instead of duplicating the current
+  value.
+- **Per-site index pages** (`docs/sites/*/README.md`, `docs/remote/README.md`, and
+  `docs/mobile/README.md`) use one table listing **boxes only**; don't repeat that inventory in a
+  diagram. A box's containers / nested VMs are tabulated on that box's own page. The global
+  `docs/README.md` is the exception: it may show them in high-level site diagrams, but should not
+  add a second detailed inventory outside those diagrams.
+
+**De-dup by ownership** — each fact has one home:
+- Shared cross-box **fabric** (the AS211024 mesh, Tailscale/headscale topology, the BGP overview,
+  the WireGuard-tunnel summary) is documented once in `docs/networking.md`; box pages give a
+  one-line summary and link to it.
+- Site-wide network definitions (prefixes, VLANs, router VIPs and router HA) also live in
+  `docs/networking.md`; site pages summarize and link to the canonical section.
+- **Box-specific** detail (a box's own BGP peers, the WireGuard tunnels it terminates, its
+  services) lives on the box page; `networking.md` carries only a per-box summary that links out.
+- Addresses represented by generated `assignments` or `extraAssignments` live only in the
+  assignment tables; handwritten box and workload inventories link there instead of copying them.
+  Addresses outside that data model (such as external peers or service endpoints) stay with the
+  topic that owns them.
+
+**Generated content:** the network-assignment tables in `networking.md`, the option reference
+(`docs/reference/nixos-options.md`) and the live DNS tables (`docs/reference/dns.md`) are
+CI-generated by the corresponding `update-docs-*` packages; the workflow supplies the DNS zones.
+Don't hand-edit content between `<!-- ... -->` markers; write the surrounding prose or source
+configuration and let the updater refresh the tables. The option-reference file is generated in
+full.
+
+**Keep docs current:** when you add, remove or repurpose a box or service, update its box page, the
+relevant site-index `README.md`, and any affected prose in `networking.md` (the assignment/option
+tables refresh via CI). This is the same "prefer docs over agent memory" rule from the top of this
+file.

CLAUDE.md

@@ -0,0 +1 @@
+AGENTS.md

README.md

@@ -0,0 +1,65 @@
+# nixfiles
+
+Personal Nix flake managing every box I run: hosted servers, home
+infrastructure, routers, a remote site, VPSes and personal workstations. It is
+built around a **custom module system** layered on top of NixOS and
+home-manager rather than the stock per-host `nixosConfigurations` pattern.
+
+For the module-system internals, see [`docs/architecture.md`](docs/architecture.md); for day-to-day
+commands, deployment and secrets, see [`docs/deployment.md`](docs/deployment.md). This README is the
+map of **what is actually deployed**; the per-box details live under [`docs/`](docs) (start at
+[`docs/README.md`](docs/README.md)).
+
+> **Note:** This documentation (the README and everything under `docs/`) is a
+> work in progress and was **agent-generated** from the repository. It may be
+> incomplete or out of date — treat the Nix configuration as the source of truth.
+
+## The boxes at a glance
+
+Boxes are grouped by deployment/location. Each group has its own directory
+under `docs/` with a `README.md` overview and one page per box.
+
+| Group | What it is |
+| --- | --- |
+| [**colony**](docs/sites/colony) | Hosted dedicated server in Amsterdam (`ams1`). A VM host running the public-facing infrastructure: routing, web, git, media, object storage, chat, game servers. |
+| [**home**](docs/sites/home) | Home network: a VM host (`palace`), the home routers, storage, Home Assistant, and a workstation — plus the hand-configured switches and wireless APs tying it together. |
+| [**remote**](docs/remote) | Edge VPSes (`britway`, `britnet`) and the remote `kelder` site. |
+| [**mobile**](docs/mobile) | The `tower` laptop. |
+
+The custom installer image is documented at [`docs/misc/installer.md`](docs/misc/installer.md).
+The general topics — the module system, network and deployment — live next to the index:
+[`docs/architecture.md`](docs/architecture.md), [`docs/networking.md`](docs/networking.md) and
+[`docs/deployment.md`](docs/deployment.md). The generated custom-module option reference is at
+[`docs/reference/nixos-options.md`](docs/reference/nixos-options.md).
+
+The high-level site diagrams and box hierarchy live in [`docs/README.md`](docs/README.md).
+Networking is largely defined by per-box `assignments` plus the AS211024 L2 VXLAN mesh; see
+[`docs/networking.md`](docs/networking.md) for the full picture and
+[`docs/architecture.md`](docs/architecture.md) for the implementation mechanics.
+
+## Repo layout
+
+```
+README.md           <- you are here
+nixos/
+  boxes/            per-box configuration
+    colony/         colony host + its VMs (vms/) + shill's containers
+    home/           palace host + its VMs, routing-common, plus stream, castle
+    britway/        London VPS
+    kelder/         remote box + its containers
+    tower/          laptop
+    britnet.nix     Birmingham VPS
+  installer.nix     installer-image configuration
+  modules/          shared NixOS modules (my.* options); registered in _list.nix
+home-manager/       home-manager modules + configs
+lib/                lib.my helpers, constants (lib.my.c), net/dns helpers
+pkgs/               custom packages (overlays.default)
+secrets/            age-encrypted secrets (ragenix)
+devshell/           devshell commands (build/deploy/check/ssh helpers)
+ci/                 CI helpers (binary-cache push, docs generators)
+docs/               deployment documentation (index at docs/README.md)
+```
+
+A box is wired into the flake by adding its config file to the `configs` list
+in `flake.nix`. See [the top-level evaluation](docs/architecture.md#the-top-level-evaluation) for
+how `evalModules` turns these into `nixosConfigurations`, `homeConfigurations` and `deploy` nodes.

ci/update-docs-assignments.py

@@ -0,0 +1,194 @@
+#!/usr/bin/env python3
+"""Update the consolidated network-assignment tables in docs/networking.md.
+
+Reads nixos.allAssignments from the flake and renders assignment-key subgroups for each site
+(colony / home / remote / other) between per-site `<!-- assignments: <site> -->` markers. The
+hand-written Notes column is preserved, keyed by (box, assignment).
+"""
+
+import json
+import re
+import subprocess
+import sys
+from pathlib import Path
+
+DOCS = Path("docs")
+TARGET = DOCS / "networking.md"
+HEADER = "| Box | IPv4 | IPv6 | Domain | Notes |"
+SEP = "|---|---|---|---|---|"
+
+# Table order; also the set of valid `<!-- assignments: <site> -->` tokens.
+SITE_ORDER = ["colony", "home", "remote", "other"]
+
+# Per-site internal domains of the remote boxes (britway=lon1, britnet=bhx1, kelder=hentai).
+REMOTE_DOMAINS = ("lon1.int.nul.ie", "bhx1.int.nul.ie", "hentai.engineer")
+
+
+def site_of(assignments: dict) -> str:
+    """Classify a box into a site table by its assignment domain.
+
+    Prefer the `internal` assignment's domain, else the first assignment that has one.
+    """
+    dom = (assignments.get("internal") or {}).get("domain")
+    if not dom:
+        for a in assignments.values():
+            if a.get("domain"):
+                dom = a["domain"]
+                break
+    if not dom:
+        return "other"
+    if dom.endswith("ams1.int.nul.ie"):
+        return "colony"
+    if dom == "h.nul.ie" or dom.endswith(".h.nul.ie"):
+        return "home"
+    if any(dom.endswith(s) for s in REMOTE_DOMAINS):
+        return "remote"
+    return "other"
+
+
+def fmt_ip(ip: dict) -> str:
+    addr = ip.get("address")
+    if addr is None:
+        return "—"
+    parts = [f"{addr}/{ip.get('mask')}"]
+    if ip.get("gateway") is not None:
+        parts.append(f"gw {ip['gateway']}")
+    return f"`{' '.join(parts)}`"
+
+
+def find_page(box: str) -> str | None:
+    """Doc page for a box (relative to docs/), if one exists."""
+    for pattern in (f"{box}.md", f"{box}/README.md"):
+        for p in sorted(DOCS.rglob(pattern)):
+            return p.relative_to(DOCS).as_posix()
+    return None
+
+
+def box_cell(box: str) -> str:
+    page = find_page(box)
+    return f"[`{box}`]({page})" if page else f"`{box}`"
+
+
+def box_name_from_cell(cell: str) -> str:
+    m = re.match(r"\[`?([^`\]]+)`?\]", cell)
+    return m.group(1) if m else cell.strip("`")
+
+
+def parse_notes(lines: list[str]) -> dict[tuple[str, str], str]:
+    """Existing Notes indexed by (box, assignment), from either table layout."""
+    notes: dict[tuple[str, str], str] = {}
+    assignment = None
+    for line in lines:
+        stripped = line.strip()
+        heading = re.match(r"^####\s+`([^`]+)`$", stripped)
+        if heading:
+            assignment = heading.group(1)
+            continue
+        if not stripped.startswith("|"):
+            continue
+        cells = [c.strip() for c in stripped.split("|")]
+        # "| a | b | ... |" splits to ['', 'a', 'b', ..., '']
+        if len(cells) >= 7 and assignment is not None:
+            # Current layout: one table under each assignment heading.
+            box, row_assignment, note = cells[1], assignment, cells[5]
+        elif len(cells) >= 8:
+            # Previous layout: one site table with an Assignment column.
+            box, row_assignment, note = cells[1], cells[2], cells[6]
+        else:
+            continue
+        # Skip header and separator rows.
+        if box == "Box" or set(box) <= {"-"}:
+            continue
+        notes[(box_name_from_cell(box), row_assignment)] = note
+    return notes
+
+
+def render_site(boxes: list[str], all_assignments: dict, notes: dict) -> list[str]:
+    groups: dict[str, list[tuple[str, dict]]] = {}
+    for box in sorted(boxes):
+        for key, a in all_assignments[box].items():
+            groups.setdefault(key, []).append((box, a))
+
+    lines: list[str] = []
+    group_order = sorted(groups, key=lambda key: (key != "internal", key))
+    for key in group_order:
+        if lines:
+            lines.append("")
+        lines.extend([f"#### `{key}`", "", HEADER, SEP])
+        for box, a in groups[key]:
+            lines.append(
+                "| "
+                + " | ".join(
+                    [
+                        box_cell(box),
+                        fmt_ip(a.get("ipv4", {})),
+                        fmt_ip(a.get("ipv6", {})),
+                        a.get("domain") or "—",
+                        notes.get((box, key), ""),
+                    ]
+                )
+                + " |"
+            )
+    return lines
+
+
+def update_target(all_assignments: dict) -> bool:
+    by_site: dict[str, list[str]] = {s: [] for s in SITE_ORDER}
+    for box, assignments in all_assignments.items():
+        if not assignments:
+            continue
+        by_site[site_of(assignments)].append(box)
+
+    text = TARGET.read_text()
+    lines = text.splitlines()
+    marker_re = re.compile(r"^<!--\s*assignments:\s*(\S+)\s*-->$")
+
+    # Walk the file line by line; at each `<!-- assignments: <site> -->` marker, replace
+    # everything up to the matching `<!-- assignments-end -->` with a freshly rendered table
+    # (carrying the hand-written Notes over), leaving all other lines untouched.
+    out: list[str] = []
+    i = 0
+    while i < len(lines):
+        m = marker_re.match(lines[i].strip())
+        if not m:
+            out.append(lines[i])
+            i += 1
+            continue
+        site = m.group(1)
+        end = i + 1
+        while end < len(lines) and lines[end].strip() != "<!-- assignments-end -->":
+            end += 1
+        if end >= len(lines):
+            out.append(lines[i])
+            i += 1
+            continue
+        notes = parse_notes(lines[i + 1 : end])
+        out.append(lines[i])
+        out.append("<!-- assignments-start -->")
+        out.extend(render_site(by_site.get(site, []), all_assignments, notes))
+        out.append("<!-- assignments-end -->")
+        i = end + 1
+
+    new_text = "\n".join(out) + "\n"
+    if new_text != text:
+        TARGET.write_text(new_text)
+        return True
+    return False
+
+
+def main() -> int:
+    result = subprocess.run(
+        ["nix", "eval", ".#nixfiles.config.nixos.allAssignments", "--json"],
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+    all_assignments = json.loads(result.stdout)
+
+    if update_target(all_assignments):
+        print(f"updated {TARGET}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

ci/update-docs-dns.py

@@ -0,0 +1,362 @@
+#!/usr/bin/env python3
+"""Render docs/reference/dns.md from live authoritative DNS zone transfers.
+
+The authoritative servers are queried directly over AXFR. Records owned by Kea are
+identified by DHCID records and omitted together with their forward and reverse data.
+"""
+
+import argparse
+import ipaddress
+import re
+import socket
+import sys
+from dataclasses import dataclass
+from pathlib import Path
+
+import dns.exception
+import dns.name
+import dns.query
+import dns.resolver
+import dns.rdatatype
+
+
+OUT = Path("docs/reference/dns.md")
+DEFAULT_PORT = 53
+IGNORED_TYPES = {"DHCID", "SOA"}
+POWERDNS_ALIAS = 65401
+POWERDNS_LUA = 65402
+
+
+@dataclass(frozen=True)
+class Record:
+    zone: str
+    owner: str
+    type: str
+    value: str
+
+
+def normalize_name(name: str) -> str:
+    return name.rstrip(".").lower()
+
+
+def record_data(rdtype: int, rdata) -> tuple[str, str]:
+    if rdtype == POWERDNS_ALIAS:
+        target, _used = dns.name.from_wire(rdata.data, 0)
+        return "ALIAS", target.to_text()
+    if rdtype == POWERDNS_LUA:
+        logical_type = int.from_bytes(rdata.data[:2], byteorder="big")
+        return "LUA", dns.rdatatype.to_text(logical_type)
+    return dns.rdatatype.to_text(rdtype), rdata.to_text()
+
+
+def server_addresses(server: str, port: int) -> list[str]:
+    addresses = []
+    try:
+        for result in socket.getaddrinfo(server, port, type=socket.SOCK_STREAM):
+            address = result[4][0]
+            if address not in addresses:
+                addresses.append(address)
+    except socket.gaierror as error:
+        raise RuntimeError(f"cannot resolve nameserver {server}: {error}") from error
+    return addresses
+
+
+def transfer(server: str, port: int, zone: str) -> list[Record]:
+    addresses = server_addresses(server, port)
+
+    errors = []
+    for address in addresses:
+        try:
+            records = []
+            for message in dns.query.xfr(
+                address, zone, port=port, lifetime=60, relativize=False
+            ):
+                for rrset in message.answer:
+                    for rdata in rrset:
+                        record_type, value = record_data(rrset.rdtype, rdata)
+                        records.append(
+                            Record(
+                                zone=normalize_name(zone),
+                                owner=normalize_name(rrset.name.to_text()),
+                                type=record_type,
+                                value=value,
+                            )
+                        )
+            if not any(record.type == "SOA" for record in records):
+                raise RuntimeError("transfer returned no SOA record")
+            return records
+        except (dns.exception.DNSException, OSError, RuntimeError) as error:
+            errors.append(f"{address}: {error}")
+    raise RuntimeError(f"AXFR of {zone} from {server} failed ({'; '.join(errors)})")
+
+
+def system_nameservers(domain: str) -> list[str]:
+    try:
+        answer = dns.resolver.resolve(domain, "NS", lifetime=30)
+    except dns.exception.DNSException as error:
+        message = f"cannot discover authoritative servers for {domain}: {error}"
+        raise RuntimeError(message) from error
+    return [rdata.target.to_text() for rdata in answer]
+
+
+def nameservers_via(server: str, port: int, domain: str) -> list[str]:
+    errors = []
+    for address in server_addresses(server, port):
+        resolver = dns.resolver.Resolver(configure=False)
+        resolver.nameservers = [address]
+        resolver.port = port
+        try:
+            answer = resolver.resolve(domain, "NS", lifetime=15, search=False)
+            return [rdata.target.to_text() for rdata in answer]
+        except dns.exception.DNSException as error:
+            errors.append(f"{address}: {error}")
+    raise RuntimeError(f"NS query for {domain} via {server} failed ({'; '.join(errors)})")
+
+
+def discover_nameservers(domains: list[str], port: int) -> dict[str, list[str]]:
+    discovered = {}
+    unresolved = {}
+    candidates = []
+    for domain in domains:
+        try:
+            servers = system_nameservers(domain)
+            discovered[domain] = servers
+            for server in servers:
+                if server not in candidates:
+                    candidates.append(server)
+        except RuntimeError as error:
+            unresolved[domain] = [str(error)]
+
+    for domain, errors in list(unresolved.items()):
+        for server in candidates:
+            try:
+                discovered[domain] = nameservers_via(server, port, domain)
+                del unresolved[domain]
+                break
+            except RuntimeError as error:
+                errors.append(str(error))
+
+    if unresolved:
+        details = "; ".join(
+            f"{domain}: {'; '.join(errors)}" for domain, errors in unresolved.items()
+        )
+        raise RuntimeError(details)
+    return discovered
+
+
+def transfer_domain(
+    port: int, domain: str, servers: list[str], fallback: list[str] = ()
+) -> list[Record]:
+    # A zone may be delegated publicly to servers that refuse AXFR (e.g. HE serving
+    # reverse DNS) while our own authoritative servers, discovered for other zones,
+    # will transfer it. Try the delegated servers first, then fall back to those.
+    ordered = list(servers)
+    for server in fallback:
+        if server not in ordered:
+            ordered.append(server)
+
+    errors = []
+    for server in ordered:
+        try:
+            return transfer(server, port, domain)
+        except RuntimeError as error:
+            errors.append(str(error))
+    raise RuntimeError(f"no authoritative server allowed AXFR for {domain} ({'; '.join(errors)})")
+
+
+def dynamic_names(records: list[Record]) -> set[str]:
+    return {record.owner for record in records if record.type == "DHCID"}
+
+
+def dynamic_addresses(records: list[Record], names: set[str]) -> set[str]:
+    return {
+        record.value.rstrip(".").lower()
+        for record in records
+        if record.owner in names and record.type in {"A", "AAAA"}
+    }
+
+
+def reverse_address(owner: str) -> str | None:
+    if owner.endswith(".in-addr.arpa"):
+        labels = owner.removesuffix(".in-addr.arpa").split(".")
+        if len(labels) != 4:
+            return None
+        try:
+            return str(ipaddress.IPv4Address(".".join(reversed(labels))))
+        except ValueError:
+            return None
+
+    if owner.endswith(".ip6.arpa"):
+        labels = owner.removesuffix(".ip6.arpa").split(".")
+        if len(labels) != 32:
+            return None
+        try:
+            value = int("".join(reversed(labels)), 16)
+            return str(ipaddress.IPv6Address(value))
+        except ValueError:
+            return None
+    return None
+
+
+def static_records(records: list[Record]) -> list[Record]:
+    names = dynamic_names(records)
+    addresses = dynamic_addresses(records, names)
+    static = []
+    for record in records:
+        if record.type in IGNORED_TYPES or record.owner in names:
+            continue
+        if record.type == "PTR":
+            target = normalize_name(record.value.split()[0])
+            address = reverse_address(record.owner)
+            if target in names or address in addresses:
+                continue
+        static.append(record)
+    return static
+
+
+def relative_name(owner: str, zone: str) -> str:
+    if owner == zone:
+        return "@"
+    suffix = f".{zone}"
+    return owner[: -len(suffix)] if owner.endswith(suffix) else owner
+
+
+def markdown_code(value: str) -> str:
+    escaped = value.replace("|", "\\|")
+    return f"`{escaped}`"
+
+
+def display_record(record: Record) -> tuple[str, str]:
+    if record.type != "LUA":
+        return record.type, record.value
+    return f"{record.value} (LUA)", "generated at query time"
+
+
+def render_forward(domain: str, records: list[Record]) -> list[str]:
+    domain = normalize_name(domain)
+    rows = []
+    for record in records:
+        if record.zone != domain or record.type == "PTR":
+            continue
+        record_type, value = display_record(record)
+        rows.append((relative_name(record.owner, record.zone), record_type, value))
+    rows.sort(key=lambda row: (row[0] != "@", row[0], row[1], row[2]))
+
+    lines = ["| Name | Type | Value |", "|---|---|---|"]
+    lines.extend(
+        f"| {markdown_code(name)} | {markdown_code(record_type)} | {markdown_code(value)} |"
+        for name, record_type, value in rows
+    )
+    return lines
+
+
+def render_reverse(domain: str, records: list[Record]) -> list[str]:
+    domain = normalize_name(domain)
+    rows = []
+    for record in records:
+        if record.zone != domain or record.type != "PTR":
+            continue
+        rows.append((reverse_address(record.owner) or record.owner, record.value))
+    rows.sort(key=lambda row: ipaddress.ip_address(row[0]))
+
+    lines = ["| Address | Name |", "|---|---|"]
+    lines.extend(
+        f"| {markdown_code(address)} | {markdown_code(name)} |" for address, name in rows
+    )
+    return lines
+
+
+def is_reverse(domain: str) -> bool:
+    domain = normalize_name(domain)
+    return domain.endswith(".in-addr.arpa") or domain.endswith(".ip6.arpa")
+
+
+def rendered_zones(transferred: list[tuple[str, list[Record]]]) -> dict[str, list[str]]:
+    records = static_records([record for _domain, zone in transferred for record in zone])
+    rendered = {}
+    for domain, _raw_records in transferred:
+        if is_reverse(domain):
+            rendered[normalize_name(domain)] = render_reverse(domain, records)
+        else:
+            rendered[normalize_name(domain)] = render_forward(domain, records)
+    return rendered
+
+
+def update_target(transferred: list[tuple[str, list[Record]]], target: Path) -> bool:
+    rendered = rendered_zones(transferred)
+    text = target.read_text()
+    lines = text.splitlines()
+    marker_re = re.compile(r"^<!--\s*dns:\s*(\S+)\s*-->$")
+    found = set()
+    output = []
+    i = 0
+    while i < len(lines):
+        match = marker_re.match(lines[i].strip())
+        if not match or normalize_name(match.group(1)) not in rendered:
+            output.append(lines[i])
+            i += 1
+            continue
+
+        domain = normalize_name(match.group(1))
+        end = i + 1
+        while end < len(lines) and lines[end].strip() != "<!-- dns-end -->":
+            end += 1
+        if end >= len(lines):
+            raise RuntimeError(f"missing <!-- dns-end --> for {domain}")
+
+        output.extend(
+            [
+                lines[i],
+                "<!-- dns-start -->",
+                *rendered[domain],
+                "<!-- dns-end -->",
+            ]
+        )
+        found.add(domain)
+        i = end + 1
+
+    missing = rendered.keys() - found
+    if missing:
+        raise RuntimeError(f"missing DNS markers for: {', '.join(sorted(missing))}")
+
+    new = "\n".join(output) + "\n"
+    if new == text:
+        return False
+    target.write_text(new)
+    return True
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(prog="update-docs-dns", description=__doc__)
+    parser.add_argument("domain", nargs="+", help="DNS zone to transfer")
+    parser.add_argument("--port", type=int, default=DEFAULT_PORT)
+    parser.add_argument("--output", type=Path, default=OUT)
+    args = parser.parse_args()
+
+    try:
+        nameservers = discover_nameservers(args.domain, args.port)
+        fallback = []
+        for servers in nameservers.values():
+            for server in servers:
+                if server not in fallback:
+                    fallback.append(server)
+        transferred = [
+            (domain, transfer_domain(args.port, domain, nameservers[domain], fallback))
+            for domain in args.domain
+        ]
+    except RuntimeError as error:
+        print(f"update-docs-dns: {error}", file=sys.stderr)
+        return 1
+
+    try:
+        changed = update_target(transferred, args.output)
+    except (OSError, RuntimeError) as error:
+        print(f"update-docs-dns: {error}", file=sys.stderr)
+        return 1
+    if changed:
+        print(f"updated {args.output}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

ci/update-docs-options.py

@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+"""Render docs/reference/nixos-options.md from the `my.*` module options.
+
+Builds the `optionsDoc` flake output (a `nixosOptionsDoc` JSON dump of the custom
+`my.*` options) and renders it to a per-module table. The prose lives in the option
+descriptions in `nixos/modules/`; this file is generated.
+"""
+
+import json
+import re
+import subprocess
+import sys
+from pathlib import Path
+
+OPTIONS_DOC_ATTR = ".#nixfiles.config.nixos.optionsDoc"
+OUT = Path("docs/reference/nixos-options.md")
+HEADER = "| Option | Type | Default | Description |"
+SEP = "|---|---|---|---|"
+
+
+def collapse(text: str) -> str:
+    # Strip the flake's own /nix/store/<hash>-source/ prefix from rendered values so
+    # defaults like `./.keys/deploy.pub` are stable (the hash changes every time this
+    # generated file — part of the source tree — is rewritten).
+    text = re.sub(r"/nix/store/[a-z0-9]{32}-source/", "", text)
+    text = re.sub(
+        r'<link\s+xlink:href="([^"]+)">([\s\S]+?)</link>',
+        r"[\2](\1)",
+        text,
+    )
+    return re.sub(r"\s+", " ", text).strip().replace("|", "\\|")
+
+
+def render_default(entry: dict) -> str:
+    if "default" not in entry:
+        return "—"
+    d = entry["default"]
+    # A dict default is a `defaultText` / `literalExpression` (pre-rendered Nix in `text`);
+    # anything else is a literal value we JSON-encode.
+    if isinstance(d, dict):
+        text = d.get("text")
+        if text is None:
+            text = json.dumps(d.get("value"))
+    else:
+        text = json.dumps(d)
+    text = collapse(text)
+    return f"`{text}`" if text else "—"
+
+
+def build_options_json() -> dict:
+    # `optionsDoc` builds to a derivation containing share/doc/nixos/options.json; the last
+    # printed out-path is the derivation root.
+    out = subprocess.run(
+        ["nix", "build", "--no-link", "--print-out-paths", OPTIONS_DOC_ATTR],
+        capture_output=True,
+        text=True,
+        check=True,
+    ).stdout.strip().splitlines()[-1]
+    return json.loads((Path(out) / "share/doc/nixos/options.json").read_text())
+
+
+def main() -> int:
+    opts = build_options_json()
+
+    by_module: dict[str, list[tuple[str, dict]]] = {}
+    for key, entry in opts.items():
+        decls = entry.get("declarations") or []
+        # Only document options declared in this repo's modules. Some `my.*` options
+        # (e.g. `my.buildAs`, which aliases `options.system.build`) pull in sub-options
+        # declared in nixpkgs; their declaration paths don't exist here — skip them.
+        if not decls or not Path(decls[0]).exists():
+            continue
+        by_module.setdefault(decls[0], []).append((key, entry))
+
+    lines = [
+        "# NixOS module options (`my.*`)",
+        "",
+        "> **Generated** from the module option descriptions by `nix run .#update-docs-options`;",
+        "> CI keeps it current. The source of truth is the `mkOpt'` / `mkBoolOpt'` declarations in",
+        "> `nixos/modules/` — edit those, not this file. For what each module is *for*, see the",
+        "> [shared-modules overview](../architecture.md#shared-modules).",
+        "",
+    ]
+    for decl in sorted(by_module):
+        mod = Path(decl).stem
+        if decl != "(unknown)":
+            lines.append(f"## `{mod}` — [`{decl}`](../../{decl})")
+        else:
+            lines.append(f"## `{mod}`")
+        lines += ["", HEADER, SEP]
+        for key, entry in sorted(by_module[decl], key=lambda kv: kv[0]):
+            lines.append(
+                f"| `{key}` | {collapse(entry.get('type', ''))} | "
+                f"{render_default(entry)} | {collapse(entry.get('description', ''))} |"
+            )
+        lines.append("")
+
+    OUT.parent.mkdir(parents=True, exist_ok=True)
+    new = "\n".join(lines).rstrip() + "\n"
+    old = OUT.read_text() if OUT.exists() else ""
+    if new != old:
+        OUT.write_text(new)
+        print(f"updated {OUT}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

devshell/default.nix

@@ -12,6 +12,9 @@ in
     NIX_USER_CONF_FILES = toString (pkgs.writeText "nix.conf"
       ''
         experimental-features = nix-command flakes ca-derivations
+        lazy-trees = true
+        eval-cores = 0
+        accept-flake-config = true
         connect-timeout = 5
         fallback = true
         ${lib.my.c.nix.cache.conf}
@@ -22,7 +25,7 @@ in
 
   packages = with pkgs; [
     coreutils
-    nixVersions.stable
+    determinate-nix
     rage
     wireguard-tools
     (pkgs.writeShellScriptBin "deploy" ''

devshell/install.nix

@@ -29,7 +29,7 @@ let
       coreutils
       gnugrep
       openssh
-      nixVersions.stable
+      determinate-nix
       jq
     ];
     text =

docs/README.md

@@ -0,0 +1,94 @@
+# Deployment documentation
+
+> **Note:** these pages are a work in progress and were **agent-generated** from the repository.
+> They may be incomplete or out of date — treat the Nix configuration as the source of truth.
+
+This directory documents the boxes managed by this flake: their roles, network assignments,
+hierarchy, and the services they run. For the mechanics of the repo itself (conventions, module
+system internals for contributors, agent guidance), see [`AGENTS.md`](../AGENTS.md).
+
+The two big sites follow the pattern:
+
+```
+physical host (VM host)
+└── VM (for things impractical to containerise)
+    └── container host VM
+        └── NixOS containers (one per application group)
+```
+
+Not every box fits this pattern, but **colony** and **home** are organised this way.
+
+## General
+
+- [`architecture.md`](architecture.md) — the custom module system, `my.*` namespace, multiple
+  nixpkgs channels, shared module inventory.
+- [`networking.md`](networking.md) — network assignments, domains, site topologies, router HA,
+  the AS211024 L2 mesh, BGP, WireGuard, Tailscale.
+- [`deployment.md`](deployment.md) — deploy-rs, devshell commands, secrets workflow, CI.
+- [`nixpkgs-upgrade.md`](nixpkgs-upgrade.md) — guided procedure for the periodic upgrade of the four
+  nixpkgs channels and home-manager (fork rebase, stable bumps, input review).
+- [`reference/dns.md`](reference/dns.md) — generated forward and reverse DNS record reference.
+- [`reference/nixos-options.md`](reference/nixos-options.md) — generated per-option reference for
+  the custom `my.*` NixOS modules.
+
+## Site: colony (Amsterdam)
+
+Physical host and public-infrastructure hub — see [`sites/colony/README.md`](sites/colony/README.md).
+
+```
+colony (physical VM host, ams1)
+├── estuary ── edge router: WAN, firewall/NAT, DNS, BGP (AS211024), WireGuard
+├── shill ──── NixOS container host ──┬── middleman    (reverse proxy, ACME, nginx-sso, librespeed)
+│                                     ├── vaultwarden  (password manager)
+│                                     ├── colony-psql  (shared PostgreSQL)
+│                                     ├── chatterbox   (Matrix Synapse + bridges)
+│                                     ├── jackflix     (media stack)
+│                                     ├── object       (MinIO, Harmonia Nix cache, Sharry, HedgeDoc, wastebin)
+│                                     ├── toot         (Bluesky PDS; Mastodon disabled)
+│                                     ├── waffletail   (Tailscale subnet router / exit node)
+│                                     ├── qclk         (WireGuard management appliance)
+│                                     ├── gam          (Terraria server)
+│                                     └── jam          (raw nspawn customer container)
+├── whale2 ─── podman/OCI host for game servers
+├── git ────── Gitea + Gitea Actions runner
+├── mail ───── Debian VM running mailcow (not NixOS)
+└── darts ──── third-party/customer VM (opaque, not NixOS)
+```
+
+## Site: home
+
+Redundant routers, VM host, storage, IoT containers and the workstation — see
+[`sites/home/README.md`](sites/home/README.md). The hand-configured switch fabric (jim/dave/brian)
+and the Digiweb WAN path are documented in [`sites/home/switches.md`](sites/home/switches.md).
+
+```
+h.nul.ie
+├── palace (physical VM host — AMD, 100G, SR-IOV)
+│   ├── river ── primary router VM (PPPoE / Digiweb WAN)
+│   ├── cellar ─ NVMe-oF / SPDK storage target VM
+│   └── sfh ──── container host VM ("shill from home")
+│       ├── hass ── Home Assistant + Frigate + MQTT (container)
+│       └── unifi ─ UniFi controller (container)
+├── stream (physical secondary router — Virgin Media WAN)
+└── castle (workstation / gaming desktop — netboot, NVMe-oF root)
+```
+
+## Remote boxes
+
+The edge VPSes and remote `kelder` site are indexed in [`remote/README.md`](remote/README.md).
+
+## Mobile boxes
+
+The laptop is indexed in [`mobile/README.md`](mobile/README.md).
+
+## Misc
+
+- [`misc/installer.md`](misc/installer.md) — the custom NixOS installer image.
+
+## A note on the assignment tables
+
+The consolidated [`Box assignments`](networking.md#box-assignments) tables in
+[`networking.md`](networking.md) (one per site, between `<!-- assignments: <site> -->` markers)
+are **generated from the flake** (`nixos.allAssignments`) by `nix run .#update-docs-assignments` —
+CI refreshes them on push. Individual box pages link to that section rather than carrying their
+own table. Only the Notes column is hand-written; don't hand-edit the other cells.

docs/architecture.md

@@ -0,0 +1,266 @@
+# Architecture
+
+This flake does **not** use the stock pattern of calling `nixosSystem` once per host in
+[`flake.nix`](../flake.nix). Instead it runs a single `lib.evalModules` evaluation over its own
+module tree, producing one big top-level config (`self.nixfiles`) from which the real flake
+outputs (`nixosConfigurations`, `homeConfigurations`, `nixosModules`, `deploy`, …) are derived.
+Per-host files declare *options* (`nixos.systems.<name>`); the machinery in
+[`nixos/default.nix`](../nixos/default.nix) and
+[`home-manager/default.nix`](../home-manager/default.nix) turns those into evaluated NixOS /
+home-manager configurations.
+
+## The top-level evaluation
+
+`flake.nix`'s `outputs` builds a `nixfiles` attrset via `evalModules` over:
+
+- An inline module that seeds `_module.args` (`lib`, `pkgsFlakes`, `hmFlakes`, `self`, `inputs`,
+  `pkgs'`), sets `nixos.secretsPath = ./secrets`, and sets the global deploy-rs SSH option
+  `deploy-rs.deploy.sshOpts = [ "-i" ".keys/deploy.key" ]`.
+- `nixos/modules/misc/assertions.nix` from the unstable nixpkgs (so the top-level evaluation has
+  the standard `assertions` / `warnings` options).
+- [`nixos/`](../nixos/default.nix) — defines `nixos.*` options (`systems`, `modules`,
+  `allAssignments`, `vpns`, `secretsPath`) and `mkSystem`.
+- [`home-manager/`](../home-manager/default.nix) — defines `home-manager.*` options (`homes`,
+  `modules`) and `mkHome`.
+- [`deploy-rs.nix`](../deploy-rs.nix) — defines `deploy-rs.*` and renders the deploy config.
+- Every file in the `configs` list — the boxes themselves
+  ([`nixos/boxes/`](../nixos/boxes) plus [`nixos/installer.nix`](../nixos/installer.nix); the
+  home-manager entries are currently commented out, see [Home-manager](#home-manager)).
+
+The resulting `nixfiles.config` is mapped onto flake outputs:
+
+| Top-level option (`nixfiles.config`) | Flake output |
+|---|---|
+| `nixos.systems.<name>.rendered` | `nixosConfigurations.<name>` |
+| `home-manager.homes.<name>.configuration` | `homeConfigurations.<name>` |
+| `nixos.modules` | `nixosModules` |
+| `home-manager.modules` | `homeModules` |
+| `deploy-rs.rendered` | `deploy` |
+
+`nixfiles` itself is also a flake output, so anything in the top-level config can be addressed
+directly — e.g. `build-iso` builds
+`.#nixfiles.config.nixos.systems."<host>".configuration.config.my.buildAs.iso`. The flake also
+exposes `lib` (the extended unstable nixpkgs lib, including `lib.my`), `inputs`, `nixpkgs`
+(the `pkgs'` channel sets), and `overlays.default` (the custom packages from
+[`pkgs/`](../pkgs/default.nix)).
+
+Per platform (`eachDefaultSystem`), the flake produces:
+
+- `packages` — everything from `pkgs/`, flattened.
+- `checks` — every `homeConfigurations.*.activationPackage` plus deploy-rs's own `deployChecks`.
+- `devShells.default` — the `numtide/devshell` from [`devshell/`](../devshell) (see
+  [deployment.md](deployment.md)).
+- `ci.<system>` — one attr per buildable thing (`system-<name>`, `home-<name>` with `@` mangled
+  to `-at-`, `package-<name>`, plus `shell`), consumed by CI; `ciDrv` is a `linkFarm` of all of
+  them.
+
+## Systems: `systemOpts` and `mkSystem`
+
+Each entry of `nixos.systems` is a submodule defined by `systemOpts` in
+[`nixos/default.nix`](../nixos/default.nix):
+
+| Option | Type / default | Meaning |
+|---|---|---|
+| `system` | enum of `defaultSystems` | Nix platform string, e.g. `"x86_64-linux"`. |
+| `nixpkgs` | one of `unstable`/`stable`/`mine`/`mine-stable`, default `"unstable"` | nixpkgs channel for the system. |
+| `home-manager` | same enum, defaults to `nixpkgs` | home-manager channel. |
+| `hmNixpkgs` | same enum, defaults to `nixpkgs` | nixpkgs channel used for home-manager's own pkgs when it doesn't share the system's. |
+| `docCustom` | bool, default `false` | Include nixfiles' custom modules in the generated NixOS manual (slow). |
+| `assignments` | attrsOf `assignmentOpts` | The box's network assignments (see [networking.md](networking.md)). |
+| `extraAssignments` | attrsOf attrsOf `assignmentOpts` | Extra assignments for things not on the box itself (e.g. the routers' floating VIP entries). |
+| `configuration` | custom merged type | The actual NixOS configuration module(s); merging runs `mkSystem`. |
+| `rendered` | unspecified, default `configuration` | What ends up in `nixosConfigurations.<name>` — overridden for boxes built as something other than a plain system (e.g. `installer` renders `config.my.asISO`, containers render `config.my.asContainer`). |
+
+`mkSystem` does the real work:
+
+1. It selects the channel's nixpkgs flake (`pkgsFlakes.${config'.nixpkgs}`).
+   - It imports `nixos/lib/eval-config.nix` **by hand** because the flake force-sets `lib`;
+     otherwise `eval-config.nix` would import its own unextended copy.
+   - The supplied library is the channel's `pkgs.lib` extended with `lib.my` and a
+     `versionOverlay` that stamps `system.nixos` with the flake revision and channel.
+2. `specialArgs` gives every module access to `self`, `inputs`, `pkgsFlakes`, the box's own
+   `pkgsFlake`, `allAssignments` (every box's assignments), and `systems` (all of
+   `nixos.systems`). Passing these via `specialArgs` (rather than module `imports`) avoids
+   infinite recursion.
+3. The module list is: the home-manager channel's `nixosModules.default`, every module in
+   `nixos.modules` (the shared modules, see below), an inline module, and the box's own
+   `configuration` definitions (wrapped with `inlineModule'` so error messages keep file
+   provenance).
+4. The inline module wires the plumbing:
+   - `_module.args`: `secretsPath`, `vpns` (the flake-level `nixos.vpns`), the box's own
+     `assignments`, and `pkgs'` — an attrset of **all four nixpkgs channels** for this box's
+     platform, so a module can grab a package from another channel (e.g. `pkgs'.stable.foo`).
+   - `system.name` is the attribute name of the box.
+   - `networking.hostName` / `networking.domain` default from the `internal` assignment (see
+     [networking.md](networking.md)).
+   - `nixpkgs.system` is set and the overlays computed at flake level (lib overlay + custom
+     packages) are passed through, so `pkgs` is imported modularly with config and overlays
+     applied.
+   - `home-manager.useGlobalPkgs` defaults to true when the system and home-manager channels
+     match; a warning is emitted when they deliberately differ.
+   - `home-manager.sharedModules` includes every module in `home-manager.modules` plus an inline
+     module. The inline module passes `pkgsPath` / `pkgs'`, disables the release check, and pins
+     `home.stateVersion` through `homeStateVersion` (`22.11` for stable-flavoured channels,
+     `23.05` otherwise).
+5. Finally `applyAssertions` throws with all failed assertion messages (and shows warnings)
+   when the merged configuration is forced.
+
+## The four nixpkgs channels
+
+`flake.nix` builds `pkgsFlakes` (nixpkgs) and `hmFlakes` (home-manager):
+
+| Channel | nixpkgs input | home-manager input |
+|---|---|---|
+| `unstable` | `nixpkgs/nixos-unstable` | `home-manager` (master) |
+| `stable` | `nixpkgs/nixos-26.05` | `home-manager/release-26.05` |
+| `mine` | `github:devplayer0/nixpkgs/devplayer0` (personal fork) | alias of `unstable` (no fork exists) |
+| `mine-stable` | `github:devplayer0/nixpkgs/devplayer0-stable` | alias of `stable` |
+
+Each channel's `lib` is extended with the `libOverlay` (`lib.my` + flake-utils). Two package
+sets are built per channel:
+
+- `pkgs'` — with the devshell/ragenix/deploy-rs/home-manager overlays; used for the dev shell
+  and `packages`, and exposed as the flake's `nixpkgs` output.
+- `configPkgs'` — with just the lib + custom-packages overlays and an `allowUnfreePredicate`
+  (Widevine / Chromium); this is the `pkgs'` threaded into the top-level evaluation, from
+  which each box's `pkgs` and per-channel `pkgs'` module args (and home-manager's base
+  `pkgs`) are taken.
+
+A box picks its channel with `nixpkgs = "mine"` (most boxes), `"mine-stable"` (e.g. `colony`),
+etc. Inside a module, `pkgs` is the selected channel and `pkgs'` is the attrset of all four
+(`pkgs'.<channel>.<attr>`).
+
+## `lib.my` and the `my.*` namespace
+
+[`lib/default.nix`](../lib/default.nix) extends nixpkgs `lib` with a `my` attrset. The
+flake-level `lib` (`pkgsFlakes.unstable.lib` so extended) is for platform-independent flake
+use only; each box gets its own channel's lib extended the same way. Contents:
+
+- **Option helpers** — `mkOpt'`, `mkBoolOpt'`, `nullOrOpt'`, `mkDefault'` (slightly stronger than
+  `mkDefault`), `mkVMOverride'`, `inlineModule'` / `inlineModule`
+  (attach `_file` provenance), `commonOpts` (the shared `system`/`nixpkgs`/`home-manager`
+  options and the `moduleType` used for exported modules), `applyAssertions`, `duplicates`.
+- **`lib.my.net`** — CIDR/IP math (`net.cidr.host`, `net.cidr.subnet`, `net.types.ipv4`, …)
+  from the `libnetRepo` input (`oddlama/nixos-extra-modules`' `netu.nix`). Used for nearly all
+  address arithmetic; addresses are almost never written literally.
+- **`lib.my.c`** — shared constants from [`lib/constants.nix`](../lib/constants.nix): static
+  UID/GID assignments, kernel package selection (`kernel.lts`/`kernel.latest`), nginx config
+  snippets, networkd snippets (`networkd.noL3`), the binary-cache settings (`nix.cache`),
+  and the per-site domains/prefixes/VIPs described in [networking.md](networking.md).
+- **`lib.my.dns`** — zone-generation helpers from [`lib/dns.nix`](../lib/dns.nix): `fwdRecords`
+  / `ptrRecords` / `ptr6Records` rendered from `allAssignments`, plus the LUA-record helpers
+  (`ifaceA`, `lookupIP`) used by the home routers.
+- **networkd helpers** — `networkdAssignment` (assignment → `systemd.network` network, see
+  [networking.md](networking.md)), `mkVLAN`, `dockerNetAssignment`.
+
+### Misc
+
+The remaining helpers are `mkDefaultSystemsPkgs`, `flakePackageOverlay` (wrap another flake's
+package as an overlay), `isIPv6` / `parseIPPort` / `netBroadcast`, `nft` chain-name helpers,
+`systemdAwaitPostgres`, `vm.*` LVM disk descriptors for the `vms` module, the typed `deploy-rs`
+option definitions (`lib.my.deploy-rs`), `netbootKeaClientClasses` (iPXE/EFI DHCP client classes),
+and `homeStateVersion`.
+
+Custom NixOS / home-manager modules declare their options under the `my.*` namespace (the root
+`options.my` is declared in `nixos/modules/common.nix` / `home-manager/modules/common.nix`) —
+e.g. `my.secrets`, `my.build`, `my.tmproot`, `my.firewall`, `my.server`, `my.deploy`,
+`my.vms`, `my.containers`.
+
+## Shared modules
+
+Registered in [`nixos/modules/_list.nix`](../nixos/modules/_list.nix) and applied to **every**
+system (box files opt in per-feature via `my.*` options). The table below is the overview — what
+each module is *for*; for the exhaustive, CI-generated per-option reference (types, defaults,
+descriptions) see [`reference/nixos-options.md`](reference/nixos-options.md).
+
+| Module | Provides |
+|---|---|
+| `common` | Baseline for all boxes: imports the impermanence, ragenix (age), sharry, copyparty and harmonia NixOS modules; pins `system.stateVersion`; `doas` instead of `sudo`; immutable users; nix settings (flakes, `ca-derivations`, the `nix-cache.nul.ie` substituter); declares the `my` option root. |
+| `user` | `my.user` — the primary user: `users.users` + matching `home-manager.users` entry, wheel/doas, SSH authorized key from `.keys/me.pub`, shell taken from the home config, home persistence under tmproot. |
+| `build` | `my.build` — alternate build targets via `extendModules`: `my.buildAs.devVM` (QEMU dev VM), `iso`, `container`, `kexecTree`, `netbootTree`/`netbootArchive`; `my.build.isDevVM` marker; `allHardware` profile toggle. |
+| `dynamic-motd` | `my.dynamic-motd` — runs a script via `pam_exec` to generate the MOTD on login/ssh. |
+| `tmproot` | `my.tmproot` — tmpfs `/` plus impermanence persistence (`persistence.dir`), with a `tmproot-unsaved` helper that walks the root tmpfs and lists files not covered by persistence. |
+| `firewall` | `my.firewall` — nftables firewall: `tcp.allowed`/`udp.allowed` port lists, `trustedInterfaces`, NAT with `forwardPorts`, `extraRules` escape hatch; sane ICMP/ICMPv6/PMTUD rules baked in. |
+| `server` | `my.server.enable` — server commonalities: getty autologin, LLMNR off, tightened fstrim timers, GUI and NixOS documentation off. |
+| `deploy-rs` | `my.deploy` — per-box deploy-rs node/profile generation and the `deploy` user; see [deployment.md](deployment.md). |
+| `secrets` | `my.secrets` — ragenix/agenix wiring: `files` to decrypt from `secrets/`, host `key` to encrypt for, identity paths derived from the OpenSSH host keys (persistence-aware), dev-key identity inside dev VMs. |
+| `containers` | `my.containers.instances` — `systemd-nspawn` NixOS containers whose systems come from `nixos.systems` rendered `asContainer`, with bridge/macvlan networking, bind mounts, `hotReload` (reload instead of reboot) and a placeholder "dummy" init before first deploy. |
+| `vms` | `my.vms.instances` — QEMU/KVM VMs as systemd units: TAP/bridge networking, LVM-backed disks, VFIO host-device passthrough (with udev tagging), UEFI, SPICE/TTY/QMP unix sockets under `/run/vms/`, clean shutdown via QMP `system_powerdown`. |
+| `network` | Baseline networking: networkd only (`useDHCP = false`), IPv6 on, resolved domain/negative-cache settings; dev VMs get DHCP on `eth0` and an SSH port forward. |
+| `pdns` | `my.pdns` — PowerDNS: authoritative server driven by BIND-style zone files (with templating and serial management) and recursor extra-settings wiring. |
+| `nginx-sso` | `my.nginx-sso` — runs `nginx-sso` (instead of the stock NixOS module) and generates per-instance nginx `auth_request` include files. |
+| `gui` | `my.gui.enable` (default on) — desktop baseline: graphics, polkit, swaylock PAM entry, Android udev rules, screenshot tmpdir. |
+| `l2mesh` | Consumes `nixos.vpns.l2` — builds the VXLAN + IPsec layer-2 meshes between edge routers; see [networking.md](networking.md). |
+| `borgthin` | `my.borgthin.jobs` — borg backups of thin-LVM snapshots to local or SSH repos on a systemd timer, with pruning. |
+| `nvme` | `my.nvme` — sets the NVMe host NQN/hostid and, optionally, NVMe-oF-over-RDMA boot in the initrd. |
+| `spdk` | `my.spdk` — SPDK target configuration (JSON RPC-driven) plus `spdk-rpc`/`spdk-setup`/`spdk-debug` helper tools. |
+| `librespeed` | `my.librespeed` — a LibreSpeed speedtest: generated frontend (from the `librespeed-go` package in `pkgs/`) plus backend settings. |
+| `netboot` | `my.netboot` — iPXE netboot server (TFTP/HTTP, menu) and the client-side loader that installs boot entries. |
+
+Home-manager modules, registered in
+[`home-manager/modules/_list.nix`](../home-manager/modules/_list.nix) and applied to every
+home (including the per-user homes attached to systems via `my.user.homeConfig`):
+
+| Module | Provides |
+|---|---|
+| `common` | Home baseline: `my.shell`, `my.ssh.authKeys`, `my.isStandalone` (home-manager running standalone vs inside NixOS), fish setup and completions generation, common programs. |
+| `gui` | `my.gui` — the sway-based desktop: waybar, notifications, lock/saver plumbing (including the "doomsaver"), terminal and fonts. |
+| `deploy-rs` | `my.deploy` for standalone homes — generates a `home` profile (home-manager activation) and deploy node; auto-disabled for NixOS-attached homes. |
+| `swaync` | `my.swaync` — typed configuration module for Sway Notification Center. |
+
+## Adding a box
+
+1. Create a file (or directory with a `default.nix`) under [`nixos/boxes/`](../nixos/boxes)
+   that sets `nixos.systems.<name> = { system = "x86_64-linux"; nixpkgs = "mine"; assignments =
+   { … }; configuration = { … }: { … }; };`. Nested boxes (VMs, containers) live under their
+   host's directory (e.g. `nixos/boxes/colony/vms/estuary/`).
+2. Add the path to the `configs` list in [`flake.nix`](../flake.nix).
+3. Give the box an `internal` assignment (name/domain) if it gets one — `hostName`/`domain`
+   default from it — and declare `my.secrets.key` if it has secrets.
+4. Evaluate it with `check-system <name>` (cheap) before `build-system <name>`.
+
+## Adding a shared module
+
+1. Drop the file in [`nixos/modules/`](../nixos/modules) (or
+   [`home-manager/modules/`](../home-manager/modules)) with options under `my.*`, declared via
+   the `lib.my` helpers (`mkOpt'`, `mkBoolOpt'`).
+2. Register it in the corresponding `_list.nix` (name → path). It is then applied to every
+   box and exported as `nixosModules.<name>` / `homeModules.<name>`.
+
+## Home-manager
+
+Home-manager follows the same option-definition and evaluation split as NixOS.
+
+### `homeOpts`
+
+[`home-manager/default.nix`](../home-manager/default.nix) defines each entry with these options:
+
+| Option | Meaning |
+|---|---|
+| `system` | Target platform. |
+| `nixpkgs` | nixpkgs channel used for the home packages. |
+| `home-manager` | home-manager channel. |
+| `homeDirectory` / `username` | User identity and home path. |
+| `configuration` | The home-manager module definitions evaluated by `mkHome`. |
+
+### `mkHome`
+
+1. Calls the selected channel's `lib.homeManagerConfiguration`.
+2. Supplies that channel's `pkgs'` with `config` emptied, allowing home-manager to apply package
+   configuration and overlays through its module system.
+3. Passes `inputs`, `pkgsFlakes` and the selected `pkgsFlake` through `extraSpecialArgs`.
+4. Loads every module in `home-manager.modules` plus an inline module that sets
+   `home.homeDirectory` / `home.username` and exposes every channel through the `pkgs'` module
+   argument.
+5. Pins `home.stateVersion` through `homeStateVersion`.
+
+### Standalone homes
+
+Standalone homes live in [`home-manager/configs/`](../home-manager/configs) and are named
+`<user>@<host>` (deploy-rs mangles the `@` to `-at-`). `macsimum` is a home-manager-only
+config — an `x86_64-darwin` macOS box with no NixOS side.
+
+No standalone homes are currently wired into the flake: `home-manager/configs/macsimum.nix` is
+commented out of `configs`, while `home-manager/configs/castle.nix` is not listed. Consequently,
+`nixfiles.config.home-manager.homes` evaluates to `{}`. Most user configuration instead accompanies
+NixOS boxes through `my.user.homeConfig`.

docs/deployment.md

@@ -0,0 +1,233 @@
+# Deployment and workflows
+
+How boxes get deployed, the devshell commands that drive everyday work, secrets, dev VMs, and
+CI.
+
+## deploy-rs
+
+### Rendering
+
+The top-level [`deploy-rs.nix`](../deploy-rs.nix) renders the flake's `deploy` output:
+
+- It collects `nixos.systems` and `home-manager.homes` (mangling `@` in home names to
+  `-at-`, since deploy-rs node names can't contain `@`). An assertion rejects name collisions
+  between systems and homes.
+- A system/home becomes a deploy node only when `configuration.config.my.deploy.enable` is
+  true. The node config is the *definitions* of the box's `my.deploy.node` option, re-imported
+  as a module so deploy-rs's submodule merging still applies.
+- `autoRollback` and `magicRollback` are off globally; global `sshOpts` are
+  `[ "-i" ".keys/deploy.key" ]` (set in [`flake.nix`](../flake.nix)).
+- The result is passed through `lib.my.deploy-rs.filterOpts`, which strips nulls so unset
+  options don't override deploy-rs defaults, and exposed as `deploy = deploy-rs.rendered`.
+
+### Per-box nodes
+
+The shared [`nixos/modules/deploy-rs.nix`](../nixos/modules/deploy-rs.nix) module provides
+`my.deploy`:
+
+- `my.deploy.enable` defaults to true, but is **automatically forced off for dev VMs and
+  NixOS containers** (`my.build.isDevVM` / `boot.isContainer` — containers are deployed
+  through their host instead, see below). The installer also disables it explicitly.
+- Node defaults: `hostname` = the box's FQDN, `sshUser = "deploy"`, `user = "root"`,
+  `sudo = "doas -u"` (or `sudo -u`), `sshOpts` = the box's first OpenSSH port. The module
+  creates the `deploy` system user (bash shell, wheel, keys from `my.deploy.authorizedKeys`,
+  which defaults to `.keys/deploy.pub`).
+
+Generated profiles deploy in this order:
+
+1. **`system`** activates `config.system.build.toplevel` with `switch-to-configuration switch`,
+   applies the `/tmp` cwd and systemd-boot `loader.conf` workarounds, then prunes old generations.
+   `keepGenerations` controls how much history is retained; zero disables pruning.
+2. **`container-<name>`** activates each `my.containers.instances` entry into
+   `/nix/var/nix/profiles/per-container/<name>/system`. With `hotReload` (the default), it reloads
+   `systemd-nspawn@<name>` and restarts only a stopped container or one still running the dummy
+   init; otherwise it restarts the unit. The same generation cleanup applies.
+
+### Usage
+
+- `deploy .#<host>` — the devshell's `deploy` is a wrapper that adds `--skip-checks`. Node
+  names are the system names (`deploy .#git`).
+- `deploy-multi <hosts...>` — loops `deploy` over several nodes (extra args via `$O`).
+- `deploy --boot .#<host>` — stages the config as the boot default **without** live-switching
+  (deploy-rs's `--boot` maps to the custom activation's `boot` phase, which also does the
+  generation cleanup). Use it when a live `switch` would cut the box off mid-change (e.g. a
+  router WAN rework), then reboot to cut over.
+- `nix flake check` includes deploy-rs's own `deployChecks` for the whole `deploy` attrset.
+
+#### `ssh-machine`
+
+`ssh-machine <name> [cmd]` resolves `user@host` and the merged global/node `sshOpts` from
+`.#deploy`, using the same `my.deploy.enable` gate and `@` → `-at-` mangling as `deploy`, then runs
+`ssh`. Boxes default to `fish`, so pipe multi-statement remote scripts through `bash`, for example
+`ssh-machine <name> bash -s < script.sh`. If a flaky agent stalls public-key authentication, use
+`SSH_AUTH_SOCK= ssh-machine …`.
+
+## Devshell commands
+
+The repo ships a `numtide/devshell` ([`devshell/`](../devshell), entered via `direnv`). Run a
+command with no arguments for its help. From
+[`devshell/commands.nix`](../devshell/commands.nix):
+
+| Command | What it does |
+|---|---|
+| `check-system <host> [nix args]` | Evaluates `.#nixosConfigurations."<host>".config.system.build.toplevel.drvPath` — catches module/option errors without building. Prefer this to validate a config change. |
+| `build-system <host> [nix args]` | Builds the system's `toplevel` (extra args pass through to `nix build`). |
+| `build-n-switch <args>` | `doas nixos-rebuild --flake .` (adds the repo as a git `safe.directory` for root first). |
+| `build-home <name> [nix args]` | Builds `.#homeConfigurations."<name>".activationPackage`. |
+| `home-switch [args]` | `home-manager switch --flake .`. |
+| `deploy [args]` | `deploy-rs --skip-checks` (wrapper package in `devshell/default.nix`). |
+| `deploy-multi <nodes...>` | Deploys several nodes in sequence. |
+| `ssh-machine <name> [cmd]` | SSH to a system or home by name, resolving target/options from its deploy-rs node (see above). |
+| `run-vm <host>` | Boots a system as a dev VM: installs `.keys/dev.key` into a temp `xchg/`, then `nix run`s `config.my.buildAs.devVM`. |
+| `build-iso <host>` | Builds `config.my.buildAs.iso`. |
+| `build-kexec <host>` | Builds `config.my.buildAs.kexecTree`. |
+| `build-netboot <host>` | Builds `config.my.buildAs.netbootTree`. |
+| `ragenix [args]` | `ragenix --identity .keys/dev.key` (see [Secrets](#secrets)). |
+| `repl` | `nix repl .#`. |
+| `fmt [args]` | `nixpkgs-fmt` (the canonical formatter). |
+| `update-nixpkgs` | `nix flake update nixpkgs-{unstable,stable,mine,mine-stable}`. |
+| `update-home-manager` | `nix flake update home-manager-{unstable,stable}`. |
+| `update-installer` | Force-pushes the `installer` tag to trigger the installer release workflow. |
+| `home-link` / `home-unlink` | Symlink (or remove) this `flake.nix` at `~/.config/home-manager/flake.nix` for standalone `home-manager` use. |
+| `qemu-genmac` | Prints a random QEMU-suitable MAC (`52:54:00:xx:xx:xx`). |
+| `ssh-get-ed25519 <host>` | Prints a host's ed25519 pubkey via `ssh-keyscan`. |
+| `json2nix` | Converts JSON on stdin to formatted Nix. |
+
+From [`devshell/install.nix`](../devshell/install.nix) (driven by `$INSTALLER`, the address of
+a running custom installer, SSHing as root with `.keys/deploy.key`):
+
+| Command | What it does |
+|---|---|
+| `installer-shell [cmd]` | Runs a command (default: a shell) inside the installer. |
+| `do-install [--no-bootloader] [--no-substitute] <system>` | Builds the system's `toplevel`, `nix copy`s it into the installer's target store, sets the system profile, and activates it with `switch-to-configuration boot` (with `NIXOS_INSTALL_BOOTLOADER=1` unless `--no-bootloader`). |
+
+From [`devshell/vm-tasks.nix`](../devshell/vm-tasks.nix) (remote VM consoles; they forward the
+VM's unix sockets from `/run/vms/<vm>/` on `<host>` over SSH):
+
+| Command | What it does |
+|---|---|
+| `vm-tty <host> <vm>` | Serial TTY of a VM in `minicom`. |
+| `vm-monitor <host> <vm>` | QEMU monitor socket in `minicom`. |
+| `vm-viewer <host> <vm>` | SPICE display in `virt-viewer` (not on Darwin). |
+
+## Nix implementation
+
+Every context uses **Determinate Nix** as its `nix.package`, for its performance features
+(parallel evaluation and lazy trees) — not `determinate-nixd`; the daemon and `nix.conf` model
+are unchanged, and the Determinate NixOS module is deliberately not imported.
+
+- **Input and package.** The [`determinate-nix`](../flake.nix) input is the `nix-src` flake
+  (`flakehub.com/f/DeterminateSystems/nix-src`), with `nixpkgs.follows = "nixpkgs-unstable"`. We
+  build it ourselves against our pinned nixpkgs — FlakeHub's own cache needs authentication, so
+  there is nothing to gain from leaving it unpinned — and it then flows through the Harmonia cache
+  like everything else. `determinateOverlay` exposes it under the stable attr `determinate-nix`,
+  added to both the devshell `pkgs'` and the config `configPkgs'` overlay lists, so systems, homes
+  and the devshell all resolve the same package (`pkgs'.mine.determinate-nix`).
+- **Settings.** `lib.my.c.nix.determinateSettings` (`lazy-trees`, `eval-cores = 0`) is merged into
+  `nix.settings` for systems and homes and into the devshell's `nix.conf`. These keys are only
+  understood by the Determinate binary.
+- **Consumers follow automatically.** Everything that shells out to Nix references
+  `config.nix.package` (deploy-rs, containers, `build`, netboot, Harmonia), so they inherit
+  Determinate without further change.
+- **`accept-flake-config`.** Set true only in the devshell `nix.conf`, `.envrc` (as
+  `--accept-flake-config`, for direnv) and CI — the contexts that build this flake — so its
+  `nixConfig` (the Harmonia cache) is trusted without an interactive prompt. It is deliberately not
+  set system-wide: boxes already trust that cache via `nix.settings`, so a global setting would only
+  blanket-trust every flake's `nixConfig` for no gain.
+
+## Secrets
+
+Secrets are age-encrypted files in [`secrets/`](../secrets), managed with **ragenix** (a fork
+with a rekey flag, from the flake inputs).
+
+### Per-box declarations
+
+Each box declares `my.secrets.key`, the host public key its secrets encrypt to, and
+`my.secrets.files.<name>`, whose values merge settings such as `owner` and `mode` into the agenix
+secret. At runtime, identity paths come from the box's OpenSSH host keys. On tmproot boxes they are
+read from the persistence directory because agenix runs before the persisted keys would otherwise
+be available.
+
+### Recipient rules
+
+[`secrets.nix`](../secrets.nix) is generated from every system's `my.secrets.files` and `key`.
+Each recipient list also includes `.keys/dev.pub`, so the development key can open every secret.
+Run `ragenix -r` after adding a box or secret to re-key the files.
+
+### Local keys and editing
+
+The `ragenix` devshell command wraps `ragenix --identity .keys/dev.key`. The `.keys/` directory
+contains that development key, the deploy key authorized for every box's `deploy` user, and other
+keys referenced by `lib.my.c.sshKeyFiles`; it is required for editing secrets, deploying and running
+development VMs.
+
+## Dev VMs
+
+Any system can be built as a throwaway QEMU VM via `config.my.buildAs.devVM` (the `build`
+module extends the config with `qemu-vm.nix` and sets `my.build.isDevVM`). `run-vm <host>`
+creates a temp dir, installs `.keys/dev.key` as `xchg/dev.key`, and runs the VM; inside, the
+`secrets` module switches `age.identityPaths` to that dev key (`my.secrets.vmKeyPath`,
+default `/tmp/xchg/dev.key`), so dev VMs can decrypt the boxes' secrets without the real host
+keys. Dev VMs also get DHCP on `eth0`, an SSH port forward (host 2222 → guest 22), and are
+automatically excluded from deploy targets.
+
+## CI
+
+GitHub/Gitea Actions workflows live in [`.gitea/workflows/`](../.gitea/workflows).
+
+### `ci.yaml`
+
+On pushes to `master`, this installs Determinate Nix on the runner (via
+`DeterminateSystems/determinate-nix-action`, configured with the same performance settings and
+Harmonia substituter as the boxes), runs `nix flake check --no-build`, then builds every attribute
+of `.#ci.x86_64-linux`: systems as `system-<name>`, homes as `home-<name>` (with `@` changed to
+`-at-`), packages as `package-<name>`, and the development `shell`. Each result is pushed to the
+Harmonia cache with [`ci/push-to-cache.sh`](../ci/push-to-cache.sh).
+
+It then builds `.#ciDrv.x86_64-linux`, a `linkFarm` of all CI attributes, and pushes it with
+`UPDATE_PROFILE=1`. That updates the `nixfiles` profile on the cache box and collects old paths
+according to the workflow's retention setting. The SSH store uses `/var/lib/harmonia`,
+`HARMONIA_SSH_KEY`, and pinned `ci/known_hosts`; clients use `https://nix-cache.nul.ie` through
+`lib.my.c.nix.cache`.
+
+### `installer.yaml`
+
+Pushing the `installer` tag (refreshed by `update-installer`) builds `my.buildAs.iso` and
+`my.buildAs.netbootArchive`, then attaches both to a release.
+
+### `update-docs.yaml`
+
+On pushes to `master`, excluding its own commits, this runs the assignment, option and DNS
+reference generators and commits changed outputs as `docs: Update generated references`.
+
+### The docs generators
+
+The generators are registered in [`pkgs/default.nix`](../pkgs/default.nix) as wrappers around
+Python scripts under [`ci/`](../ci). They leave the worktree unchanged when their output is current;
+the workflow stages `docs/` and uses `git diff --cached --quiet` to decide whether to commit.
+
+`update-docs-assignments` ([`ci/update-docs-assignments.py`](../ci/update-docs-assignments.py))
+evaluates `.#nixfiles.config.nixos.allAssignments` to JSON and rewrites the consolidated
+[`Box assignments`](networking.md#box-assignments) tables in `docs/networking.md` — one table
+per site (`colony` / `home` / `remote`), each between a `<!-- assignments: <site> -->` marker
+and a closing `<!-- assignments-end -->` line. Boxes are grouped by site from their assignment
+domain, and each `Box` cell links to that box's page when one exists. Hand-written text in the
+**Notes** column is preserved across runs (keyed by box + assignment), so notes survive
+regeneration. Individual box pages don't carry tables; they link to the consolidated section.
+
+`update-docs-options` ([`ci/update-docs-options.py`](../ci/update-docs-options.py)) builds the
+`nixos.optionsDoc` output (declared in [`nixos/default.nix`](../nixos/default.nix)) — a
+`nixosOptionsDoc` JSON dump of the custom `my.*` options (declared with `mkOpt'` / `mkBoolOpt'` in
+`nixos/modules/`). It's evaluated against a **minimal synthetic system**, since the shared modules
+apply to every box, so defaults don't pick up a real host's values. The renderer writes
+[`docs/reference/nixos-options.md`](reference/nixos-options.md), one table per module file. The
+whole file is generated; edit the option descriptions in the modules, not the reference. The
+internal `asX` build-target options are marked `internal = true` so they're excluded.
+
+`update-docs-dns` ([`ci/update-docs-dns.py`](../ci/update-docs-dns.py)) accepts forward and reverse
+zone names, discovers their authoritative nameservers through NS queries, and transfers each zone
+over AXFR. If a private reverse zone is not visible through the configured recursive resolver, it
+asks the authoritative servers discovered for the other requested zones. It updates only the
+matching `<!-- dns: <zone> -->` blocks in the [`DNS records`](reference/dns.md) reference; the page's
+headings and prose remain handwritten. Kea-managed owners are identified by `DHCID` records and
+removed together with their A, AAAA and PTR records; SOA records and TTLs are also omitted.

docs/misc/installer.md

@@ -0,0 +1,41 @@
+# installer
+
+The custom NixOS installer image used to bootstrap new boxes.
+
+- **Source:** [`nixos/installer.nix`](../../nixos/installer.nix)
+- **Host:** — (a build target, not a deployed box)
+
+## Role
+
+- Defines `nixos.systems.installer`, a minimal server system rendered as a bootable ISO via
+  `config.my.buildAs.iso` (`my.asISO`); the same base can also be built as a kexec or netboot
+  tree.
+- Build it with the devshell commands: `build-iso installer` (or `build-kexec installer` /
+  `build-netboot installer`). The `update-installer` command force-tags `installer` to
+  trigger a release rebuild in CI.
+
+## Image contents
+
+- Broad hardware support (`my.build.allHardware` pulls in the nixpkgs all-hardware profile);
+  EFI- and USB-bootable, zstd-compressed squashfs. Volume ID
+  `jackos-<release>-<arch>`, menu label "/dev/player0 Installer", image base name
+  `jackos-installer`.
+- Root SSH with the deploy key authorized (`PermitRootLogin prohibit-password`); a random
+  `installer-<hex>` hostname is set at boot.
+- `INSTALL_ROOT=/mnt` in the session environment, plus a `show-hw-config` alias wrapping
+  `nixos-generate-config --show-hardware-config --root $INSTALL_ROOT`.
+- NixOS documentation enabled, `wpa_supplicant` available but not started, GC and memory-overcommit
+  tuning for low-memory targets, LVM thin and NFS support.
+- No regular user (`my.user.enable = false`), no tmpfs-root management, no NAT, and not a
+  deploy target (`my.deploy.enable = false`).
+
+## Installing a box
+
+The devshell's installer commands ([`devshell/install.nix`](../../devshell/install.nix)) drive
+an install over SSH against a booted installer reachable at `$INSTALLER`:
+
+- `installer-shell` — get a shell on the installer.
+- `do-install <system>` — builds the system's toplevel, `nix copy`s the closure to the
+  installer's `$INSTALL_ROOT` remote store, sets the system profile, touches `/etc/NIXOS`,
+  and runs `switch-to-configuration boot` with `NIXOS_INSTALL_BOOTLOADER=1` (skip the
+  bootloader with `--no-bootloader`, skip substitution with `--no-substitute`).

docs/mobile/README.md

@@ -0,0 +1,9 @@
+# Mobile boxes
+
+Portable workstations that move between networks — currently just `tower`. Mobile boxes have
+no static network assignments; they use DHCP/NetworkManager and reach other boxes over the
+tailnet.
+
+| Box | What it is |
+| --- | --- |
+| [`tower`](tower.md) | Framework Laptop 13 workstation |

docs/mobile/tower.md

@@ -0,0 +1,50 @@
+# tower
+
+Portable workstation — a Framework Laptop 13 (Intel), running the full GUI environment.
+
+- **Source:** [`nixos/boxes/tower/default.nix`](../../nixos/boxes/tower/default.nix)
+- **Host:** physical (laptop)
+- **nixpkgs:** `mine`
+
+## Hardware / platform
+
+| Component | Inventory |
+|---|---|
+| Platform | Framework Laptop 13 (12th Gen Intel Core) |
+| CPU | Intel Core i5-1240P (12 cores / 16 threads) |
+| Memory | 32 GiB |
+| Storage | 2 TB WD Black SN850 NVMe SSD |
+| Graphics | Integrated Intel Iris Xe |
+| Connectivity | Intel AX210 Wi-Fi 6E, Bluetooth and Thunderbolt 4 |
+
+The configuration enables Intel microcode updates, `kvm-intel`, `intel_iommu=on`,
+`intel-media-driver` and the latest kernel (`lib.my.c.kernel.latest`). Thunderbolt security
+(`bolt`), the fingerprint reader (`fprintd`) and `tlp` power management are also enabled.
+
+## Role
+
+- Personal portable workstation: `my.gui.enable`, with Sway managed by home-manager.
+- Joins the tailnet through the headscale on [`britway`](../remote/britway.md) (fish abbr
+  `tsup` = `doas tailscale up --login-server=https://hs.nul.ie --accept-routes`).
+
+## Network assignments
+
+`tower` has no static assignment; it uses DHCP through NetworkManager and reaches the other boxes
+over Tailscale.
+
+## Storage
+
+- Two LUKS-encrypted partitions, `persist` and `home` (both `allowDiscards`); `/nix` is a
+  separate ext4 filesystem, `/boot` is vfat.
+- Persistent `/home` (`my.user.tmphome = false`) with a size-limited tmpfs root (`my.tmproot.size`).
+
+## Networking / services
+
+- NetworkManager (`wpa_supplicant` backend) with `systemd-resolved`; networkd `wait-online`
+  is disabled. The Wi-Fi interface is renamed to `wifi` by MAC.
+- Steam and Wireshark enabled; `fstrim`, LVM thin provisioning.
+- `nix.gc.automatic = false` — GC is run manually on the laptop.
+
+## Notable config files
+
+- [`nixos/boxes/tower/default.nix`](../../nixos/boxes/tower/default.nix) — the whole box (single file).

docs/networking.md

@@ -0,0 +1,440 @@
+# Networking
+
+This page describes how addressing works across the boxes: the assignment mechanism, the
+per-site domains and prefixes, the home router HA pair, and the overlays/tunnels that tie the
+sites together. Switch-level home topology (jim/dave/brian, the ONT path) lives in
+[sites/home/switches.md](sites/home/switches.md).
+
+## Assignments
+
+Every box declares `nixos.systems.<name>.assignments`, an attrset of *assignments* (one per
+network the box is attached to). The option definition (`assignmentOpts` in
+[`nixos/default.nix`](../nixos/default.nix)):
+
+- `name` (defaults to the attribute name) and `altNames` — DNS names for the assignment.
+- `visible` (default `true`) — whether DNS helpers include it.
+- `domain` — DNS suffix for this assignment.
+- `mtu` — interface MTU (applied via the network's `linkConfig.MTUBytes`).
+- `ipv4.address` / `ipv4.mask` (default 24) / `ipv4.gateway` (defaults to host 1 of the
+  prefix; set explicitly to `null` when there is no gateway) / `ipv4.genPTR`.
+- `ipv6.address` (nullable — an assignment can be v4-only) / `ipv6.mask` (default 64) /
+  `ipv6.iid` (SLAAC static token instead of a full address) / `ipv6.gateway` / `ipv6.genPTR`.
+
+`extraAssignments` is a second, nested level for addresses that belong *to* a network but not
+to any single box — the home routers use it for their floating VIP entries (`router-hi`,
+`router-lo`, `router-ut`).
+
+All assignments are aggregated into `nixos.allAssignments` — every system's `assignments`
+merged with every system's `extraAssignments` — and passed to every module as the
+`allAssignments` argument, so any box can route to any other box's addresses without
+hardcoding. A flake-wide assertion fails evaluation if any IPv4 or IPv6 address appears in
+more than one assignment. Each box also receives its own assignments as the `assignments`
+module argument.
+
+Two pieces of machinery consume assignments:
+
+- `lib.my.networkdAssignment` ([`lib/default.nix`](../lib/default.nix)) renders an assignment
+  as a `systemd.network` network: static `address`/`gateway`, MTU, LLDP, and IPv6 RA handling
+  (`IPv6AcceptRA` when there's no static gateway or a static `iid` is set, with
+  `Token = static:<iid>`).
+- `mkSystem` defaults `networking.hostName` to `assignments.internal.name` (falling back to
+  the system name) and `networking.domain` to `assignments.internal.domain`. The shared
+  `network` module sets a fallback domain of `int.nul.ie` for boxes without one.
+
+## Box assignments
+
+Every box's `assignments` (plus the routers' floating VIP `extraAssignments`), grouped first by site
+and then by assignment key. Generated from `nixos.allAssignments` by
+`nix run .#update-docs-assignments`; CI keeps it current. Only the **Notes** column is hand-written —
+edit prose there, never the other generated cells.
+
+### colony
+
+<!-- assignments: colony -->
+<!-- assignments-start -->
+#### `internal`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`chatterbox`](sites/colony/shill/containers/chatterbox.md) | `10.100.2.5/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::5/64` | ams1.int.nul.ie |  |
+| [`colony`](sites/colony/colony.md) | `94.142.241.224/32` | `2a0e:97c0:4d2:10::2/64` | ams1.int.nul.ie |  |
+| [`colony-psql`](sites/colony/shill/containers/colony-psql.md) | `10.100.2.4/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::4/64` | ams1.int.nul.ie |  |
+| `enshrouded-oci` | `10.100.3.5/24 gw 10.100.3.1` | `2a0e:97c0:4d2:13::5/64` | ams1.int.nul.ie | Enshrouded OCI container on [`whale2`](sites/colony/whale2.md#game-servers); disabled |
+| [`estuary`](sites/colony/estuary.md) | `94.142.240.44/24 gw 94.142.240.254` | `2a02:898:0:20::329:1/64 gw 2a02:898:0:20::1` | ams1.int.nul.ie |  |
+| [`gam`](sites/colony/shill/containers/gam.md) | `10.100.2.11/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::b/64` | ams1.int.nul.ie |  |
+| [`git`](sites/colony/git.md) | `94.142.241.117/32` | `2a0e:97c0:4d2:11::4/64` | ams1.int.nul.ie |  |
+| `graeme-oci` | `10.100.3.8/24 gw 10.100.3.1` | `2a0e:97c0:4d2:13::8/64` | ams1.int.nul.ie | Minecraft OCI container on [`whale2`](sites/colony/whale2.md#game-servers) |
+| [`jackflix`](sites/colony/shill/containers/jackflix.md) | `10.100.2.6/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::6/64` | ams1.int.nul.ie |  |
+| `kevcraft-oci` | `10.100.3.6/24 gw 10.100.3.1` | `2a0e:97c0:4d2:13::6/64` | ams1.int.nul.ie | Minecraft OCI container on [`whale2`](sites/colony/whale2.md#game-servers) |
+| `kinkcraft-oci` | `10.100.3.7/24 gw 10.100.3.1` | `2a0e:97c0:4d2:13::7/64` | ams1.int.nul.ie | Minecraft OCI container on [`whale2`](sites/colony/whale2.md#game-servers) |
+| [`middleman`](sites/colony/shill/containers/middleman.md) | `10.100.2.2/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::2/64` | ams1.int.nul.ie |  |
+| [`object`](sites/colony/shill/containers/object.md) | `10.100.2.7/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::7/64` | ams1.int.nul.ie |  |
+| [`qclk`](sites/colony/shill/containers/qclk.md) | `10.100.2.10/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::a/64` | ams1.int.nul.ie |  |
+| [`shill`](sites/colony/shill/README.md) | `94.142.241.225/32` | `2a0e:97c0:4d2:11::2/64` | ams1.int.nul.ie |  |
+| `simpcraft-oci` | `10.100.3.3/24 gw 10.100.3.1` | `2a0e:97c0:4d2:13::3/64` | ams1.int.nul.ie | Minecraft OCI container on [`whale2`](sites/colony/whale2.md#game-servers) |
+| `simpcraft-staging-oci` | `10.100.3.4/24 gw 10.100.3.1` | `2a0e:97c0:4d2:13::4/64` | ams1.int.nul.ie | Minecraft staging OCI container on [`whale2`](sites/colony/whale2.md#game-servers); disabled |
+| [`toot`](sites/colony/shill/containers/toot.md) | `10.100.2.8/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::8/64` | ams1.int.nul.ie |  |
+| `valheim-oci` | `10.100.3.2/24 gw 10.100.3.1` | `2a0e:97c0:4d2:13::2/64` | ams1.int.nul.ie | Valheim OCI container on [`whale2`](sites/colony/whale2.md#game-servers) |
+| [`vaultwarden`](sites/colony/shill/containers/vaultwarden.md) | `10.100.2.3/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::3/64` | ams1.int.nul.ie |  |
+| [`waffletail`](sites/colony/shill/containers/waffletail.md) | `10.100.2.9/24 gw 10.100.2.1` | `2a0e:97c0:4d2:12::9/64` | ams1.int.nul.ie |  |
+| [`whale2`](sites/colony/whale2.md) | `94.142.241.226/32` | `2a0e:97c0:4d2:11::3/64` | ams1.int.nul.ie |  |
+
+#### `as211024`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`estuary`](sites/colony/estuary.md) | `10.100.50.1/24` | `2a0e:97c0:4df::1/64` | — |  |
+
+#### `base`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`estuary`](sites/colony/estuary.md) | `10.100.0.1/24` | `2a0e:97c0:4d2:10::1/64` | ams1.int.nul.ie |  |
+
+#### `ctrs`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`shill`](sites/colony/shill/README.md) | `10.100.2.1/24` | `2a0e:97c0:4d2:12::1/64` | ams1.int.nul.ie |  |
+
+#### `oci`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`whale2`](sites/colony/whale2.md) | `10.100.3.1/24` | `2a0e:97c0:4d2:13::1/64` | ams1.int.nul.ie |  |
+
+#### `qclk`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`qclk`](sites/colony/shill/containers/qclk.md) | `10.100.4.1/24` | — | — |  |
+
+#### `routing`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`colony`](sites/colony/colony.md) | `10.100.0.2/24 gw 10.100.0.1` | — | ams1.int.nul.ie |  |
+| [`git`](sites/colony/git.md) | `10.100.1.4/24 gw 10.100.1.1` | — | ams1.int.nul.ie |  |
+| [`shill`](sites/colony/shill/README.md) | `10.100.1.2/24 gw 10.100.1.1` | — | ams1.int.nul.ie |  |
+| [`whale2`](sites/colony/whale2.md) | `10.100.1.3/24 gw 10.100.1.1` | — | ams1.int.nul.ie |  |
+
+#### `tailscale`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`waffletail`](sites/colony/shill/containers/waffletail.md) | `100.64.0.5/32` | `fd7a:115c:a1e0::5/128` | — |  |
+
+#### `vms`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`colony`](sites/colony/colony.md) | `10.100.1.1/24` | `2a0e:97c0:4d2:11::1/64` | ams1.int.nul.ie |  |
+<!-- assignments-end -->
+
+### home
+
+<!-- assignments: home -->
+<!-- assignments-start -->
+#### `as211024`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`river`](sites/home/river.md) | `10.100.50.2/24` | `2a0e:97c0:4df:0:1::1/64 gw 2a0e:97c0:4df:0:2::1` | — |  |
+| [`stream`](sites/home/stream.md) | `10.100.50.3/24` | `2a0e:97c0:4df:0:1::2/64 gw 2a0e:97c0:4df:0:2::1` | — |  |
+
+#### `core`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`palace`](sites/home/palace.md) | `192.168.64.20/24` | — | h.nul.ie |  |
+| [`river`](sites/home/river.md) | `192.168.64.1/24` | — | h.nul.ie |  |
+| [`stream`](sites/home/stream.md) | `192.168.64.2/24` | — | h.nul.ie |  |
+| [`unifi`](sites/home/sfh/containers/unifi.md) | `192.168.64.21/24` | — | h.nul.ie |  |
+
+#### `hi`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`castle`](sites/home/castle.md) | `192.168.68.40/22 gw 192.168.71.254` | `2a0e:97c0:4d0:1::3:1/64` | h.nul.ie |  |
+| [`cellar`](sites/home/cellar.md) | `192.168.68.80/22 gw 192.168.71.254` | `2a0e:97c0:4d0:1::4:1/64` | h.nul.ie |  |
+| [`hass`](sites/home/sfh/containers/hass.md) | `192.168.68.103/22 gw 192.168.71.254` | `2a0e:97c0:4d0:1::5:3/64` | h.nul.ie |  |
+| [`palace`](sites/home/palace.md) | `192.168.68.22/22 gw 192.168.71.254` | `2a0e:97c0:4d0:1::2:1/64` | h.nul.ie |  |
+| [`river`](sites/home/river.md) | `192.168.68.1/22` | `2a0e:97c0:4d0:1::1/64` | h.nul.ie |  |
+| `router-hi` | `192.168.71.254/22 gw 192.168.68.1` | `2a0e:97c0:4d0:1::ffff/64` | h.nul.ie | Floating VIP shared by [`river`](sites/home/river.md) and [`stream`](sites/home/stream.md) |
+| [`sfh`](sites/home/sfh/README.md) | `192.168.68.81/22 gw 192.168.71.254` | `2a0e:97c0:4d0:1::4:2/64` | h.nul.ie |  |
+| [`stream`](sites/home/stream.md) | `192.168.68.2/22` | `2a0e:97c0:4d0:1::2/64` | h.nul.ie |  |
+| [`unifi`](sites/home/sfh/containers/unifi.md) | `192.168.68.100/22 gw 192.168.71.254` | `2a0e:97c0:4d0:1::5:1/64` | h.nul.ie |  |
+
+#### `lo`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`hass`](sites/home/sfh/containers/hass.md) | `192.168.72.103/21` | `2a0e:97c0:4d0:2::5:3/64` | h.nul.ie |  |
+| [`river`](sites/home/river.md) | `192.168.72.1/21` | `2a0e:97c0:4d0:2::1/64` | h.nul.ie |  |
+| `router-lo` | `192.168.79.254/21 gw 192.168.72.1` | `2a0e:97c0:4d0:2::ffff/64` | h.nul.ie | Floating VIP shared by [`river`](sites/home/river.md) and [`stream`](sites/home/stream.md) |
+| [`stream`](sites/home/stream.md) | `192.168.72.2/21` | `2a0e:97c0:4d0:2::2/64` | h.nul.ie |  |
+
+#### `untrusted`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`river`](sites/home/river.md) | `192.168.80.1/24` | `2a0e:97c0:4d0:3::1/64` | h.nul.ie |  |
+| `router-ut` | `192.168.80.254/24 gw 192.168.80.1` | `2a0e:97c0:4d0:3::ffff/64` | h.nul.ie | Floating VIP shared by [`river`](sites/home/river.md) and [`stream`](sites/home/stream.md) |
+| [`stream`](sites/home/stream.md) | `192.168.80.2/24` | `2a0e:97c0:4d0:3::2/64` | h.nul.ie |  |
+<!-- assignments-end -->
+
+### remote
+
+<!-- assignments: remote -->
+<!-- assignments-start -->
+#### `internal`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`kelder-acquisition`](remote/kelder/containers/kelder-acquisition.md) | `172.16.64.2/24 gw 172.16.64.1` | — | hentai.engineer |  |
+| [`kelder-spoder`](remote/kelder/containers/kelder-spoder.md) | `172.16.64.3/24 gw 172.16.64.1` | — | hentai.engineer |  |
+
+#### `allhost`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`britnet`](remote/britnet.md) | `77.74.199.67/24 gw 77.74.199.1` | `2a12:ab46:5344:99::a/64 gw 2a12:ab46:5344::1` | bhx1.int.nul.ie |  |
+
+#### `as211024`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`britway`](remote/britway.md) | `10.100.50.5/24` | `2a0e:97c0:4df:0:2::1/64` | — |  |
+
+#### `ctrs`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`kelder`](remote/kelder/README.md) | `172.16.64.1/24` | — | hentai.engineer |  |
+
+#### `estuary`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`kelder`](remote/kelder/README.md) | `94.142.242.254/32` | — | — |  |
+
+#### `vpn`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`britnet`](remote/britnet.md) | `10.200.0.1/24` | `fdfb:5ebf:6e84::1/64` | — |  |
+
+#### `vultr`
+
+| Box | IPv4 | IPv6 | Domain | Notes |
+|---|---|---|---|---|
+| [`britway`](remote/britway.md) | `45.76.141.188/23 gw 45.76.140.1` | `2001:19f0:7402:128b::1/64` | lon1.int.nul.ie |  |
+<!-- assignments-end -->
+
+## Domains
+
+The public domain is `nul.ie` (`lib.my.c.pubDomain`). Each site has its own internal domain
+(constants in [`lib/constants.nix`](../lib/constants.nix)):
+
+| Site | Domain |
+|---|---|
+| colony | `ams1.int.nul.ie` |
+| home | `h.nul.ie` |
+| britway | `lon1.int.nul.ie` |
+| britnet | `bhx1.int.nul.ie` |
+| kelder | `hentai.engineer` |
+
+## colony
+
+The colony box is a hosted server in Amsterdam (`ams1`); its public edge is the `estuary` VM
+(`94.142.240.44`, `2a02:898:0:20::329:1`), which NATs and filters for everything behind it.
+The internal prefixes (`lib.my.c.colony.prefixes`) are carved from `10.100.0.0/16` and
+`2a0e:97c0:4d2:10::/60`:
+
+| Network | IPv4 | IPv6 | Purpose |
+|---|---|---|---|
+| `base` | `10.100.0.0/24` | `2a0e:97c0:4d2:10::/64` | Base/management LAN (bridge on the host; estuary is `.1`) |
+| `vms` | `10.100.1.0/24` | `2a0e:97c0:4d2:11::/64` | VM network (host is `.1`, hands out RAs) |
+| `ctrs` | `10.100.2.0/24` | `2a0e:97c0:4d2:12::/64` | `systemd-nspawn` containers on the `shill` VM |
+| `oci` | `10.100.3.0/24` | `2a0e:97c0:4d2:13::/64` | Podman/OCI workloads on the `whale2` VM |
+| `qclk` | `10.100.4.0/24` | — | WireGuard endpoint instances in the `qclk` container |
+
+On top of that: `p2pTunnels` (`10.100.5.0/24`) holds point-to-point tunnel /30s (see
+[WireGuard tunnels](#wireguard-point-to-point-tunnels)); the `as211024` mesh gets
+`10.100.50.0/24` + `2a0e:97c0:4df::/64` (see [the L2 mesh](#the-as211024-l2-mesh)); and the
+`cust` block (`10.100.100.0/24`, `2a0e:97c0:4d2:2000::/56`) plus the `vip1`/`vip2`/`vip3`
+public blocks and the per-customer `mail` / `darts` / `jam` prefixes carry customer-facing
+services with their own public addresses (announced by BGP, routed via the host).
+
+## home
+
+The home site prefixes (`lib.my.c.home.prefixes`) come from `192.168.64.0/18` and
+`2a0e:97c0:4d0::/60`, with VLAN IDs from `lib.my.c.home.vlans`:
+
+| Network | VLAN | IPv4 | IPv6 | MTU | Purpose |
+|---|---|---|---|---|---|
+| `core` | — (macvlan) | `192.168.64.0/24` | — | 1500 | Router-to-router/core link |
+| `hi` | 100 | `192.168.68.0/22` | `2a0e:97c0:4d0:1::/64` | 9000 | High-speed LAN (jumbo frames) |
+| `lo` | 110 | `192.168.72.0/21` | `2a0e:97c0:4d0:2::/64` | 1500 | General LAN |
+| `untrusted` | 120 | `192.168.80.0/24` | `2a0e:97c0:4d0:3::/64` | 1500 | Untrusted / IoT |
+| `modem` | 130 (`wan`) | `192.168.0.0/24` | — | — | Virgin Media modem management (stream) |
+| `ont` | 140 (`wan-pon-ont`) | `192.168.100.0/24` | — | — | Digiweb ONT management (river) |
+
+Two more WAN-side VLANs exist: `pon-isp` (10), the ISP VLAN Digiweb delivers at the ONT and
+which is trunked untranslated to river, and `wan-pon-isp` (141), reserved for a future
+multi-ONT translation scheme — see
+[sites/home/switches.md](sites/home/switches.md) for the fabric side.
+
+The routers themselves (`river` = host 1, `stream` = host 2 in each prefix) are built from one
+definition, [`nixos/boxes/home/routing-common`](../nixos/boxes/home/routing-common/default.nix),
+parameterised by an index (`0` = river, `1` = stream) that derives per-box addresses, DHCP
+pool splits, VRRP state/priority and DNS `ns` numbering.
+
+### Router VIPs
+
+Clients never use a router's real address: each client VLAN has a floating VIP
+(`lib.my.c.home.vips`) that follows the VRRP master. The VIPs are also declared as
+`extraAssignments` (`router-hi`/`router-lo`/`router-ut`) so they appear in `allAssignments`
+and DNS:
+
+| Assignment | IPv4 | IPv6 |
+|---|---|---|
+| `router-hi` | `192.168.71.254/22` | `2a0e:97c0:4d0:1::ffff/64` |
+| `router-lo` | `192.168.79.254/21` | `2a0e:97c0:4d0:2::ffff/64` |
+| `router-ut` | `192.168.80.254/24` | `2a0e:97c0:4d0:3::ffff/64` |
+
+There is also a mesh-side VIP (`as211024`): `10.100.50.4` and `2a0e:97c0:4df:0:1::ffff`,
+which the other sites use as their next-hop into the home prefixes.
+
+### Router HA
+
+#### VRRP
+
+[`routing-common/keepalived.nix`](../nixos/boxes/home/routing-common/keepalived.nix) defines separate
+v4/v6 instances (router IDs 51/52) on `lan-core`. Index 0 (`river`) starts as `MASTER`, priorities
+are `255 - index`, and track scripts demote a router whose WAN checks fail. All VIPs of an address
+family move together.
+
+#### Client gateway and DNS
+
+`kea` hands out `vips.<vlan>.v4` as both `routers` and `domain-name-servers`, with the two routers
+serving disjoint pool halves. `radvd` advertises the v6 VIP as RDNSS (`untrusted` gets Cloudflare)
+and keepalived's `notify_master`/`notify_backup` hooks ensure that only the master sends RAs.
+
+Statically-addressed boxes (the servers on `hi`) don't run DHCP, so they'd otherwise learn a
+resolver only from the v6 RA RDNSS — which vanishes when v6 is disabled, taking DNS with it. They
+instead anchor DNS on the VIPs via the shared `lib.my.c.home.vlanDns "<vlan>"` fragment, which sets
+`DNS` to `vips.<vlan>.{v4,v6}` and `Domains` to the advertised search list; the always-present
+static v4 VIP keeps resolution working even with v6 down.
+
+#### DNS binding
+
+`pdns-recursor` binds the VIPs directly; see
+[`routing-common/dns.nix`](../nixos/boxes/home/routing-common/dns.nix). The
+`net.ipv4.ip_nonlocal_bind` / `net.ipv6.ip_nonlocal_bind` settings let the backup listen before it
+owns the addresses, so failover does not depend on client resolver timeouts. The recursor forwards
+the site's zones to authoritative PowerDNS on `127.0.0.1:5353`. The generated
+[DNS reference](reference/dns.md) lists the live forward and reverse records; the authoritative
+servers allow its AXFRs from the shared internal prefixes and the colony site's egress address.
+
+#### `wan-online.target`
+
+This shared, initially inert systemd target means "the public IPv4 WAN route is up".
+`routing-common` only declares it: `stream` gates it on a oneshot that waits for the DHCP default
+route on `wan`, while `river`'s `pppd` hooks start and stop it. Consumers such as `ipsec` attach with
+`wantedBy` + `partOf` + `after`, never `requires`/`wants`, so they cannot pull the target in early
+and they reload on WAN flap.
+
+### WAN paths (summary)
+
+#### `river`
+
+The VM on `palace` runs Digiweb PPPoE directly on VLAN 10 (`vlans.pon-isp`), trunked untranslated
+through the switches. The carrying interface is named `wan-pon-isp`; VLAN ID 141 with that name is
+reserved for a future translation scheme. MTU 1508 preserves a 1500-byte PPP session, IPCP requests
+the static address, and the `pppd` hooks own `wan-online.target`. `wan-pon-ont` (VLAN 140) reaches
+the ONT management subnet at `192.168.100.0/24`, where `river` takes `.100`.
+
+#### `stream`
+
+The bare-metal backup uses DHCP from the Virgin Media modem on `wan` (VLAN 130), keeps a static
+`192.168.0.100/24` management address beside the public lease, and applies CAKE shaping through
+`wan-ifb`.
+
+The full fabric story — which switch port carries what, why VLAN 10 is trunked untranslated,
+and the multi-ONT plan — is in [sites/home/switches.md](sites/home/switches.md); the
+`my.homeRouter.*` options (`dns.wanSkipBroadcasts`, `firewall.untrustedRejectV4`) let each box
+tell `routing-common` about subnets sharing its WAN interface.
+
+## The AS211024 L2 mesh
+
+The edge routers are joined by a layer-2 mesh, defined once as `nixos.vpns.l2.as211024` in
+[`nixos/boxes/colony/vms/estuary/default.nix`](../nixos/boxes/colony/vms/estuary/default.nix)
+and realised on each member by the [`l2mesh` module](../nixos/modules/l2mesh.nix):
+
+### Members
+
+`estuary`, `river`, `stream` and `britway` peer on their public addresses.
+
+### Transport
+
+VXLAN (VNI 211024, UDP port 4789) uses static per-peer FDB entries and UDP-encapsulated IPsec in
+Libreswan transport mode. It authenticates without encryption by default; `security.encrypt`
+switches ESP from `null-sha256` to AES-GCM. The shared `l2mesh/as211024.key` PSK is expanded into
+`/run/l2mesh.secrets` when `ipsec` starts.
+
+### Overlay addressing
+
+The overlay uses `10.100.50.0/24` / `2a0e:97c0:4df::/64`. Each router holds `10.100.50.<n>`:
+`estuary` `.1`, `river` `.2`, `stream` `.3`, and `britway` `.5`. Interface MTU is calculated from
+the physical MTU minus VXLAN/UDP/IPsec overhead.
+
+### Routing
+
+The home routers route colony prefixes via `estuary` and Tailscale prefixes via `britway`;
+`estuary` and `britway` route home prefixes through the `10.100.50.4` VIP. The home IPv6 default
+route also crosses the mesh through `britway`, which is why the recursor pins its upstreams to IPv4
+as noted in [`routing-common/dns.nix`](../nixos/boxes/home/routing-common/dns.nix). The `nftTrust`
+snippet in `lib.my.c.as211024` admits trusted colony, home, mesh and Tailscale prefixes at the edge
+firewalls.
+
+## BGP
+
+Both edge routers run `bird2` as AS211024.
+
+### `estuary`
+
+The colony edge takes a full table from ColoClue, IPv6 transit from iFog and Hurricane Electric,
+and peers through the Frys-IX, NL-ix and FogIXP route servers. It also has direct and monitoring
+sessions; the complete peer table and originated routes live in [estuary.md](sites/colony/estuary.md#bgp).
+
+### `britway`
+
+The London edge uses secret-backed MD5 authentication for Vultr transit (AS64515), connects to
+`bgp.tools`, and originates the internal, colony and home IPv6 prefixes. See
+[britway.md](remote/britway.md) for its box-specific routing detail.
+
+## WireGuard point-to-point tunnels
+
+Separate from the mesh, a few boxes run their own WireGuard (private keys in per-box secrets):
+
+- **estuary** terminates point-to-point tunnels to `kelder`, `hillcrest` and `john-valorant`,
+  addressed out of `p2pTunnels` — see
+  [estuary.md](sites/colony/estuary.md#wireguard-tunnels) for the per-tunnel ports and prefixes.
+- **`qclk`** (container on `shill`) runs its own WireGuard on port 51821 out of `10.100.4.0/24`
+  — see [qclk.md](sites/colony/shill/containers/qclk.md).
+- **`britnet`** hosts a road-warrior WireGuard VPN on port 51820 serving `10.200.0.0/24` /
+  `fdfb:5ebf:6e84::/64` — see [britnet.md](remote/britnet.md).
+
+## Tailscale / headscale
+
+Tailscale runs against a self-hosted **headscale** control plane on britway at `https://hs.nul.ie`
+(OIDC, MagicDNS, split DNS — see [britway.md](remote/britway.md)). The tailnet prefixes are
+`100.64.0.0/10` / `fd7a:115c:a1e0::/48`.
+
+Notable nodes:
+
+- **waffletail** (container on `shill`) — the colony subnet router: advertises the colony
+  prefixes, acts as an exit node, and SNATs tailnet traffic into the colony networks.
+- **britway** — advertises the home prefixes (routed via the mesh) and is also an exit node.
+- Other boxes join with the shared `tailscale-auth.key` auth-key secret.

docs/nixpkgs-upgrade.md

@@ -0,0 +1,125 @@
+# Upgrading nixpkgs
+
+Procedure for the periodic upgrade of all four nixpkgs channels (`unstable`, `stable`, `mine`,
+`mine-stable`) and home-manager. Written to be followed by a person or any coding agent; a
+Claude Code entry point exists at `.claude/skills/upgrade-nixpkgs/` but the steps below are the
+canonical source.
+
+The upgrade is **guided, not automated**: do the mechanical and investigative steps, but stop at
+the judgment points (marked ⏸) — pushing the fork, resolving rebase conflicts, editing the
+`flake.nix` stable pins, and deleting version guards. Report findings and let the maintainer
+decide. Keep a running summary and present it before any push or commit.
+
+Work the phases in order; skip one only if explicitly scoped to a subset.
+
+## Setup facts
+
+- **Fork checkout:** `~/documents/projects/nixpkgs` — remotes `origin` (`devplayer0/nixpkgs`) and
+  `upstream` (`NixOS/nixpkgs`). Confirm the path exists; if not, ask.
+- **Fork branches:** `devplayer0` (tracks `nixos-unstable`) and `devplayer0-stable` (tracks the
+  current NixOS stable). Each is a small stack of local patches rebased onto upstream.
+- **Flake pins** in `flake.nix` (`inputs`):
+  - `nixpkgs-unstable.url = "nixpkgs/nixos-unstable"`
+  - `nixpkgs-stable.url = "nixpkgs/nixos-<STABLE>"` (e.g. `nixos-26.05`)
+  - `nixpkgs-mine.url = "github:devplayer0/nixpkgs/devplayer0"`
+  - `nixpkgs-mine-stable.url = "github:devplayer0/nixpkgs/devplayer0-stable"`
+  - `home-manager-unstable.url = "home-manager"`
+  - `home-manager-stable.url = "home-manager/release-<STABLE>"`
+- **Devshell commands:** `update-nixpkgs` = `nix flake update nixpkgs-{unstable,stable,mine,mine-stable}`;
+  `update-home-manager` = `nix flake update home-manager-{unstable,stable}`.
+- **Validation:** prefer `check-system <host>` and `nix flake check --no-build` over full builds.
+
+## Phase 1 — Determine the current NixOS stable
+
+Do this first: everything downstream (the fork's `devplayer0-stable` rebase target, the `flake.nix`
+stable pins) has to agree on one NixOS stable release, so establish it up front.
+
+1. Find the latest NixOS stable release branch — check `git branch -r` on `upstream` for the newest
+   `release-YY.NN`, or the NixOS release schedule.
+2. Compare it to `<STABLE>` in the `flake.nix` `nixpkgs-stable` / `home-manager-stable` URLs.
+3. **If they already match** (no new stable): note "stable is current" and carry `<STABLE>` into the
+   later phases.
+4. ⏸ **If a newer stable has cut:** stop and report the coordinated change set before proceeding —
+   the pieces must all move to the same release together:
+   - Rebase `devplayer0-stable` onto the new `upstream/release-YY.NN` (Phase 2 uses this target).
+   - Edit `flake.nix`: `nixpkgs-stable.url` and `home-manager-stable.url` → the new release.
+   - Bump each system's `stateVersion` / `home.stateVersion` only if the maintainer explicitly
+     wants to — that is a separate, deliberate decision; never auto-bump.
+   Don't edit `flake.nix` here without confirmation.
+
+## Phase 2 — Rebase the nixpkgs fork
+
+For **both** branches — `devplayer0` onto `upstream/nixos-unstable`, and `devplayer0-stable` onto
+`upstream/release-<STABLE>` (the release established in Phase 1):
+
+1. In `~/documents/projects/nixpkgs`, confirm a clean working tree (`git status`). If dirty, stop
+   and report — don't stash silently.
+2. `git fetch upstream --prune` and `git fetch origin --prune`. If the checkout has been idle a
+   long time this fetch can be large and slow; let it finish.
+3. Enumerate the patch stack before rebasing:
+   `git log --oneline upstream/nixos-unstable..origin/devplayer0` (and the stable equivalent
+   against `upstream/release-<STABLE>`). For each commit, check whether it has landed upstream or
+   been superseded — e.g. `git log --oneline upstream/nixos-unstable -- <path>` or grep the
+   upstream tree for the package/option. Note any patch that now looks redundant.
+4. Rebase: `git switch devplayer0 && git rebase upstream/nixos-unstable` (and the stable branch
+   onto `upstream/release-<STABLE>`).
+   - ⏸ **Conflicts:** stop. Report which patch conflicts and against what upstream change; let the
+     maintainer resolve, or drop the patch if it has been upstreamed.
+   - Clean rebase: continue.
+5. Summarize: which patches still apply, which are now redundant (candidate to drop), which
+   conflicted.
+6. ⏸ **Push:** only after confirmation. `git push --force-with-lease origin devplayer0
+   devplayer0-stable` (force needed — rebase rewrites history).
+
+## Phase 3 — Update the pinned inputs
+
+Run together (they move as a set):
+
+```
+update-nixpkgs
+update-home-manager
+```
+
+Then show the `flake.lock` diff for the nixpkgs/home-manager entries so the old→new revisions are
+visible.
+
+## Phase 4 — Sweep version-gated behavior
+
+The repo carries branch-conditional logic and TODOs keyed to specific nixpkgs versions; some become
+removable after an upgrade, especially after a stable bump. Surface them:
+
+```
+grep -rn "versionAtLeast\|versionOlder\|when 2[0-9]\.[0-9][0-9]\|TODO.*2[0-9]\.[0-9][0-9]" \
+  --include=*.nix nixos home-manager lib pkgs flake.nix
+```
+
+Known example: `nixos/modules/common.nix` carries a `# TODO: Remove if-else when 26.11 releases`
+guard. For each hit, evaluate whether the now-current versions make the guard removable and list
+candidates. ⏸ Don't delete guards without confirmation — some protect the still-supported stable.
+
+## Phase 5 — Review remaining flake inputs
+
+Don't blanket-update. Walk the other inputs deliberately:
+
+1. List inputs and locked revisions from `flake.lock` (or `nix flake metadata`).
+2. For each meaningful input (`libnetRepo`, `devshell`, `determinate-nix`, `ragenix`, `deploy-rs`,
+   `impermanence`, and the packaged apps like `boardie`, `harmonia`, `copyparty`, `sharry`, …),
+   compare the locked revision to upstream and summarize notable changes (breaking changes,
+   relevant fixes). Many inputs `follows` `nixpkgs-unstable` and already moved in Phase 3.
+3. Propose a per-input update list with reasons; update the approved ones with targeted
+   `nix flake update <input>`, not a global update.
+
+## Phase 6 — Validate
+
+1. `nix flake check --no-build` (broad eval; reproduces CI's cheap checks).
+2. `check-system <host>` on a representative box, and one exercising the stable channel if the
+   boxes mix channels.
+3. Report eval/build results honestly. On failure, surface the error and stop rather than papering
+   over it.
+
+## Wrap-up
+
+Present a final summary: fork rebase outcome (patches kept/dropped/conflicted), whether a stable
+bump is pending or was applied, the lock diff, version-gate cleanup candidates, inputs updated, and
+validation results. Leave committing to the maintainer unless asked; if committing, follow the
+repo's `area/scope: Capitalized summary` convention.

docs/reference/dns.md

@@ -0,0 +1,319 @@
+# DNS records
+
+The tables on this page are generated from live authoritative zone transfers by
+`nix run .#update-docs-dns -- <zones...>`; CI keeps them current. The Nix DNS configuration is
+the source of truth. Edit the prose and headings here, but not content between the DNS markers.
+
+DHCP-managed records are excluded. The generator identifies them by `DHCID` and removes the
+corresponding forward and reverse records. SOA records and TTLs are also omitted because they are
+operational metadata rather than useful inventory.
+
+## Colony
+
+These zones are served by [`estuary`](../sites/colony/estuary.md); their source configuration is
+[`estuary/dns.nix`](../../nixos/boxes/colony/vms/estuary/dns.nix).
+
+### Forward zone: `ams1.int.nul.ie`
+
+<!-- dns: ams1.int.nul.ie -->
+<!-- dns-start -->
+| Name | Type | Value |
+|---|---|---|
+| `@` | `ALIAS` | `estuary-vm.ams1.int.nul.ie.` |
+| `@` | `NS` | `ns.ams1.int.nul.ie.` |
+| `_acme-challenge` | `TXT (LUA)` | `generated at query time` |
+| `andrey-cust` | `A` | `94.142.242.254` |
+| `chatterbox-ctr` | `A` | `10.100.2.5` |
+| `chatterbox-ctr` | `AAAA` | `2a0e:97c0:4d2:12::5` |
+| `colony` | `A` | `94.142.241.224` |
+| `colony` | `AAAA` | `2a0e:97c0:4d2:10::2` |
+| `colony-psql` | `CNAME` | `colony-psql-ctr.ams1.int.nul.ie.` |
+| `colony-psql-ctr` | `A` | `10.100.2.4` |
+| `colony-psql-ctr` | `AAAA` | `2a0e:97c0:4d2:12::4` |
+| `colony-routing` | `A` | `10.100.0.2` |
+| `colony-vms` | `A` | `10.100.1.1` |
+| `colony-vms` | `AAAA` | `2a0e:97c0:4d2:11::1` |
+| `ctr` | `CNAME` | `shill-vm.ams1.int.nul.ie.` |
+| `darts-cust` | `A` | `94.142.242.255` |
+| `darts-cust` | `AAAA` | `2a0e:97c0:4d2:2001::1` |
+| `enshrouded` | `A` | `94.142.240.44` |
+| `enshrouded-oci` | `A` | `10.100.3.5` |
+| `enshrouded-oci` | `AAAA` | `2a0e:97c0:4d2:13::5` |
+| `estuary-vm` | `A` | `94.142.240.44` |
+| `estuary-vm` | `AAAA` | `2a02:898:0:20::329:1` |
+| `estuary-vm-base` | `A` | `10.100.0.1` |
+| `estuary-vm-base` | `AAAA` | `2a0e:97c0:4d2:10::1` |
+| `fw` | `CNAME` | `estuary-vm.ams1.int.nul.ie.` |
+| `gam-ctr` | `A` | `10.100.2.11` |
+| `gam-ctr` | `AAAA` | `2a0e:97c0:4d2:12::b` |
+| `git-vm` | `A` | `94.142.241.117` |
+| `git-vm` | `AAAA` | `2a0e:97c0:4d2:11::4` |
+| `git-vm-routing` | `A` | `10.100.1.4` |
+| `graeme` | `A` | `94.142.240.44` |
+| `graeme` | `AAAA` | `2a0e:97c0:4d2:13::8` |
+| `graeme-oci` | `A` | `10.100.3.8` |
+| `graeme-oci` | `AAAA` | `2a0e:97c0:4d2:13::8` |
+| `hillcrest-tun` | `A` | `10.100.5.2` |
+| `http` | `A` | `94.142.240.44` |
+| `http` | `AAAA` | `2a0e:97c0:4d2:12::2` |
+| `jackflix-ctr` | `A` | `10.100.2.6` |
+| `jackflix-ctr` | `AAAA` | `2a0e:97c0:4d2:12::6` |
+| `jam-cust` | `A` | `10.100.100.4` |
+| `jam-cust` | `AAAA` | `2a0e:97c0:4d2:2002::1` |
+| `jam-fwd` | `A` | `94.142.241.225` |
+| `john-valorant-tun` | `A` | `10.100.5.6` |
+| `kevcraft` | `A` | `94.142.240.44` |
+| `kevcraft` | `AAAA` | `2a0e:97c0:4d2:13::6` |
+| `kevcraft-oci` | `A` | `10.100.3.6` |
+| `kevcraft-oci` | `AAAA` | `2a0e:97c0:4d2:13::6` |
+| `kinkcraft` | `A` | `94.142.240.44` |
+| `kinkcraft` | `AAAA` | `2a0e:97c0:4d2:13::7` |
+| `kinkcraft-oci` | `A` | `10.100.3.7` |
+| `kinkcraft-oci` | `AAAA` | `2a0e:97c0:4d2:13::7` |
+| `librespeed` | `CNAME` | `http.ams1.int.nul.ie.` |
+| `mail-vm` | `A` | `94.142.241.227` |
+| `mail-vm` | `AAAA` | `2a0e:97c0:4d2:2000::1` |
+| `middleman-ctr` | `A` | `10.100.2.2` |
+| `middleman-ctr` | `AAAA` | `2a0e:97c0:4d2:12::2` |
+| `ns` | `ALIAS` | `estuary-vm.ams1.int.nul.ie.` |
+| `object-ctr` | `A` | `10.100.2.7` |
+| `object-ctr` | `AAAA` | `2a0e:97c0:4d2:12::7` |
+| `oci` | `CNAME` | `whale-vm.ams1.int.nul.ie.` |
+| `qclk-ctr` | `A` | `10.100.2.10` |
+| `qclk-ctr` | `AAAA` | `2a0e:97c0:4d2:12::a` |
+| `shill-vm` | `A` | `94.142.241.225` |
+| `shill-vm` | `AAAA` | `2a0e:97c0:4d2:11::2` |
+| `shill-vm-ctrs` | `A` | `10.100.2.1` |
+| `shill-vm-ctrs` | `AAAA` | `2a0e:97c0:4d2:12::1` |
+| `shill-vm-routing` | `A` | `10.100.1.2` |
+| `simpcraft` | `A` | `94.142.240.44` |
+| `simpcraft` | `AAAA` | `2a0e:97c0:4d2:13::3` |
+| `simpcraft-oci` | `A` | `10.100.3.3` |
+| `simpcraft-oci` | `AAAA` | `2a0e:97c0:4d2:13::3` |
+| `simpcraft-staging` | `A` | `94.142.240.44` |
+| `simpcraft-staging` | `AAAA` | `2a0e:97c0:4d2:13::4` |
+| `simpcraft-staging-oci` | `A` | `10.100.3.4` |
+| `simpcraft-staging-oci` | `AAAA` | `2a0e:97c0:4d2:13::4` |
+| `terraria` | `A` | `94.142.240.44` |
+| `terraria` | `AAAA` | `2a0e:97c0:4d2:12::b` |
+| `toot-ctr` | `A` | `10.100.2.8` |
+| `toot-ctr` | `AAAA` | `2a0e:97c0:4d2:12::8` |
+| `valheim` | `A` | `94.142.240.44` |
+| `valheim` | `AAAA` | `2a0e:97c0:4d2:13::2` |
+| `valheim-oci` | `A` | `10.100.3.2` |
+| `valheim-oci` | `AAAA` | `2a0e:97c0:4d2:13::2` |
+| `vaultwarden-ctr` | `A` | `10.100.2.3` |
+| `vaultwarden-ctr` | `AAAA` | `2a0e:97c0:4d2:12::3` |
+| `vm` | `CNAME` | `colony.ams1.int.nul.ie.` |
+| `waffletail-ctr` | `A` | `10.100.2.9` |
+| `waffletail-ctr` | `AAAA` | `2a0e:97c0:4d2:12::9` |
+| `whale-vm` | `A` | `94.142.241.226` |
+| `whale-vm` | `AAAA` | `2a0e:97c0:4d2:11::3` |
+| `whale-vm-routing` | `A` | `10.100.1.3` |
+<!-- dns-end -->
+
+### IPv4 reverse zone: `100.10.in-addr.arpa`
+
+<!-- dns: 100.10.in-addr.arpa -->
+<!-- dns-start -->
+| Address | Name |
+|---|---|
+| `10.100.0.1` | `estuary-vm-base.ams1.int.nul.ie.` |
+| `10.100.0.2` | `colony-routing.ams1.int.nul.ie.` |
+| `10.100.1.1` | `colony-vms.ams1.int.nul.ie.` |
+| `10.100.1.2` | `shill-vm-routing.ams1.int.nul.ie.` |
+| `10.100.1.3` | `whale-vm-routing.ams1.int.nul.ie.` |
+| `10.100.1.4` | `git-vm-routing.ams1.int.nul.ie.` |
+| `10.100.2.1` | `shill-vm-ctrs.ams1.int.nul.ie.` |
+| `10.100.2.2` | `middleman-ctr.ams1.int.nul.ie.` |
+| `10.100.2.3` | `vaultwarden-ctr.ams1.int.nul.ie.` |
+| `10.100.2.4` | `colony-psql-ctr.ams1.int.nul.ie.` |
+| `10.100.2.5` | `chatterbox-ctr.ams1.int.nul.ie.` |
+| `10.100.2.6` | `jackflix-ctr.ams1.int.nul.ie.` |
+| `10.100.2.7` | `object-ctr.ams1.int.nul.ie.` |
+| `10.100.2.8` | `toot-ctr.ams1.int.nul.ie.` |
+| `10.100.2.9` | `waffletail-ctr.ams1.int.nul.ie.` |
+| `10.100.2.10` | `qclk-ctr.ams1.int.nul.ie.` |
+| `10.100.2.11` | `gam-ctr.ams1.int.nul.ie.` |
+| `10.100.3.2` | `valheim-oci.ams1.int.nul.ie.` |
+| `10.100.3.3` | `simpcraft-oci.ams1.int.nul.ie.` |
+| `10.100.3.4` | `simpcraft-staging-oci.ams1.int.nul.ie.` |
+| `10.100.3.5` | `enshrouded-oci.ams1.int.nul.ie.` |
+| `10.100.3.6` | `kevcraft-oci.ams1.int.nul.ie.` |
+| `10.100.3.7` | `kinkcraft-oci.ams1.int.nul.ie.` |
+| `10.100.3.8` | `graeme-oci.ams1.int.nul.ie.` |
+<!-- dns-end -->
+
+### IPv6 reverse zone: `2.d.4.0.0.c.7.9.e.0.a.2.ip6.arpa`
+
+<!-- dns: 2.d.4.0.0.c.7.9.e.0.a.2.ip6.arpa -->
+<!-- dns-start -->
+| Address | Name |
+|---|---|
+| `2a0e:97c0:4d2:10::1` | `estuary-vm-base.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:10::2` | `colony.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:11::1` | `colony-vms.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:11::2` | `shill-vm.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:11::3` | `whale-vm.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:11::4` | `git-vm.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::1` | `shill-vm-ctrs.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::2` | `middleman-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::3` | `vaultwarden-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::4` | `colony-psql-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::5` | `chatterbox-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::6` | `jackflix-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::7` | `object-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::8` | `toot-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::9` | `waffletail-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::a` | `qclk-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:12::b` | `gam-ctr.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:13::2` | `valheim-oci.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:13::3` | `simpcraft-oci.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:13::4` | `simpcraft-staging-oci.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:13::5` | `enshrouded-oci.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:13::6` | `kevcraft-oci.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:13::7` | `kinkcraft-oci.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:13::8` | `graeme-oci.ams1.int.nul.ie.` |
+| `2a0e:97c0:4d2:2000::1` | `mail.nul.ie.` |
+| `2a0e:97c0:4d2:2001::1` | `darts-cust.ams1.int.nul.ie.` |
+<!-- dns-end -->
+
+## Home
+
+These zones are served by [`river`](../sites/home/river.md) and
+[`stream`](../sites/home/stream.md); their shared source configuration is
+[`routing-common/dns.nix`](../../nixos/boxes/home/routing-common/dns.nix).
+
+### Forward zone: `h.nul.ie`
+
+<!-- dns: h.nul.ie -->
+<!-- dns-start -->
+| Name | Type | Value |
+|---|---|---|
+| `@` | `NS` | `ns1.h.nul.ie.` |
+| `@` | `NS` | `ns2.h.nul.ie.` |
+| `boot` | `CNAME` | `river-hi.h.nul.ie.` |
+| `brian` | `A` | `192.168.64.13` |
+| `castle` | `A` | `192.168.68.40` |
+| `castle` | `AAAA` | `2a0e:97c0:4d0:1::3:1` |
+| `cellar` | `A` | `192.168.68.80` |
+| `cellar` | `AAAA` | `2a0e:97c0:4d0:1::4:1` |
+| `dave` | `A` | `192.168.68.11` |
+| `dave` | `AAAA` | `2a0e:97c0:4d0:1::1:2` |
+| `dave-core` | `A` | `192.168.64.11` |
+| `dave-lo` | `A` | `192.168.72.11` |
+| `dave-lo` | `AAAA` | `2a0e:97c0:4d0:2::1:2` |
+| `dyn` | `NS` | `ns1.dyn.h.nul.ie.` |
+| `dyn` | `NS` | `ns2.dyn.h.nul.ie.` |
+| `frigate` | `CNAME` | `hass-ctr.h.nul.ie.` |
+| `hass-ctr` | `A` | `192.168.68.103` |
+| `hass-ctr` | `AAAA` | `2a0e:97c0:4d0:1::5:3` |
+| `hass-ctr-lo` | `A` | `192.168.72.103` |
+| `hass-ctr-lo` | `AAAA` | `2a0e:97c0:4d0:2::5:3` |
+| `jim` | `A` | `192.168.68.10` |
+| `jim` | `AAAA` | `2a0e:97c0:4d0:1::1:1` |
+| `jim-core` | `A` | `192.168.64.10` |
+| `jim-lo` | `A` | `192.168.72.10` |
+| `jim-lo` | `AAAA` | `2a0e:97c0:4d0:2::1:1` |
+| `nixlight` | `A` | `192.168.72.46` |
+| `ns1` | `ALIAS` | `river.h.nul.ie.` |
+| `ns1.dyn` | `ALIAS` | `river.h.nul.ie.` |
+| `ns2` | `ALIAS` | `stream.h.nul.ie.` |
+| `ns2.dyn` | `ALIAS` | `stream.h.nul.ie.` |
+| `palace` | `A` | `192.168.68.22` |
+| `palace` | `AAAA` | `2a0e:97c0:4d0:1::2:1` |
+| `palace-core` | `A` | `192.168.64.20` |
+| `palace-kvm` | `A` | `192.168.72.21` |
+| `reolink-living-room` | `A` | `192.168.72.45` |
+| `river` | `A (LUA)` | `generated at query time` |
+| `river` | `AAAA` | `2a0e:97c0:4df:0:1::1` |
+| `river-core` | `A` | `192.168.64.1` |
+| `river-hi` | `A` | `192.168.68.1` |
+| `river-hi` | `AAAA` | `2a0e:97c0:4d0:1::1` |
+| `river-lo` | `A` | `192.168.72.1` |
+| `river-lo` | `AAAA` | `2a0e:97c0:4d0:2::1` |
+| `river-ut` | `A` | `192.168.80.1` |
+| `river-ut` | `AAAA` | `2a0e:97c0:4d0:3::1` |
+| `router-hi` | `A` | `192.168.71.254` |
+| `router-hi` | `AAAA` | `2a0e:97c0:4d0:1::ffff` |
+| `router-lo` | `A` | `192.168.79.254` |
+| `router-lo` | `AAAA` | `2a0e:97c0:4d0:2::ffff` |
+| `router-ut` | `A` | `192.168.80.254` |
+| `router-ut` | `AAAA` | `2a0e:97c0:4d0:3::ffff` |
+| `sfh` | `A` | `192.168.68.81` |
+| `sfh` | `AAAA` | `2a0e:97c0:4d0:1::4:2` |
+| `shytzel` | `A` | `192.168.64.12` |
+| `stream` | `A (LUA)` | `generated at query time` |
+| `stream` | `AAAA` | `2a0e:97c0:4df:0:1::2` |
+| `stream-core` | `A` | `192.168.64.2` |
+| `stream-hi` | `A` | `192.168.68.2` |
+| `stream-hi` | `AAAA` | `2a0e:97c0:4d0:1::2` |
+| `stream-lo` | `A` | `192.168.72.2` |
+| `stream-lo` | `AAAA` | `2a0e:97c0:4d0:2::2` |
+| `stream-ut` | `A` | `192.168.80.2` |
+| `stream-ut` | `AAAA` | `2a0e:97c0:4d0:3::2` |
+| `unifi-ctr` | `A` | `192.168.68.100` |
+| `unifi-ctr` | `AAAA` | `2a0e:97c0:4d0:1::5:1` |
+| `unifi-ctr-core` | `A` | `192.168.64.21` |
+| `ups` | `A` | `192.168.72.20` |
+| `vibe` | `A` | `192.168.68.15` |
+| `vibe` | `AAAA` | `2a0e:97c0:4d0:1::1:6` |
+| `vibe-core` | `A` | `192.168.64.15` |
+| `vibe-lo` | `A` | `192.168.72.15` |
+| `vibe-lo` | `AAAA` | `2a0e:97c0:4d0:2::1:6` |
+| `wave` | `A` | `192.168.72.14` |
+| `wave` | `AAAA` | `2a0e:97c0:4d0:2::1:5` |
+| `wave-core` | `A` | `192.168.64.14` |
+<!-- dns-end -->
+
+### IPv4 reverse zone: `168.192.in-addr.arpa`
+
+<!-- dns: 168.192.in-addr.arpa -->
+<!-- dns-start -->
+| Address | Name |
+|---|---|
+| `192.168.64.1` | `river-core.h.nul.ie.` |
+| `192.168.64.2` | `stream-core.h.nul.ie.` |
+| `192.168.64.20` | `palace-core.h.nul.ie.` |
+| `192.168.64.21` | `unifi-ctr-core.h.nul.ie.` |
+| `192.168.68.1` | `river-hi.h.nul.ie.` |
+| `192.168.68.2` | `stream-hi.h.nul.ie.` |
+| `192.168.68.22` | `palace.h.nul.ie.` |
+| `192.168.68.40` | `castle.h.nul.ie.` |
+| `192.168.68.80` | `cellar.h.nul.ie.` |
+| `192.168.68.81` | `sfh.h.nul.ie.` |
+| `192.168.68.100` | `unifi-ctr.h.nul.ie.` |
+| `192.168.68.103` | `hass-ctr.h.nul.ie.` |
+| `192.168.71.254` | `router-hi.h.nul.ie.` |
+| `192.168.72.1` | `river-lo.h.nul.ie.` |
+| `192.168.72.2` | `stream-lo.h.nul.ie.` |
+| `192.168.72.103` | `hass-ctr-lo.h.nul.ie.` |
+| `192.168.79.254` | `router-lo.h.nul.ie.` |
+| `192.168.80.1` | `river-ut.h.nul.ie.` |
+| `192.168.80.2` | `stream-ut.h.nul.ie.` |
+| `192.168.80.254` | `router-ut.h.nul.ie.` |
+<!-- dns-end -->
+
+### IPv6 reverse zone: `0.d.4.0.0.c.7.9.e.0.a.2.ip6.arpa`
+
+<!-- dns: 0.d.4.0.0.c.7.9.e.0.a.2.ip6.arpa -->
+<!-- dns-start -->
+| Address | Name |
+|---|---|
+| `2a0e:97c0:4d0:1::1` | `river-hi.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::2` | `stream-hi.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::ffff` | `router-hi.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::2:1` | `palace.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::3:1` | `castle.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::4:1` | `cellar.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::4:2` | `sfh.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::5:1` | `unifi-ctr.h.nul.ie.` |
+| `2a0e:97c0:4d0:1::5:3` | `hass-ctr.h.nul.ie.` |
+| `2a0e:97c0:4d0:2::1` | `river-lo.h.nul.ie.` |
+| `2a0e:97c0:4d0:2::2` | `stream-lo.h.nul.ie.` |
+| `2a0e:97c0:4d0:2::ffff` | `router-lo.h.nul.ie.` |
+| `2a0e:97c0:4d0:2::5:3` | `hass-ctr-lo.h.nul.ie.` |
+| `2a0e:97c0:4d0:3::1` | `river-ut.h.nul.ie.` |
+| `2a0e:97c0:4d0:3::2` | `stream-ut.h.nul.ie.` |
+| `2a0e:97c0:4d0:3::ffff` | `router-ut.h.nul.ie.` |
+<!-- dns-end -->

docs/reference/nixos-options.md

@@ -0,0 +1,286 @@
+# NixOS module options (`my.*`)
+
+> **Generated** from the module option descriptions by `nix run .#update-docs-options`;
+> CI keeps it current. The source of truth is the `mkOpt'` / `mkBoolOpt'` declarations in
+> `nixos/modules/` — edit those, not this file. For what each module is *for*, see the
+> [shared-modules overview](../architecture.md#shared-modules).
+
+## `borgthin` — [`nixos/modules/borgthin.nix`](../../nixos/modules/borgthin.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.borgthin.enable` | boolean | `false` | Whether to enable borgthin jobs |
+| `my.borgthin.jobs` | attribute set of (submodule) | `{ }` | borgthin jobs |
+| `my.borgthin.jobs.<name>.archivePrefix` | string | `"${config.networking.hostName}-${name}-"` | Prefix to start new archives with |
+| `my.borgthin.jobs.<name>.compression` | string | `"zstd,3"` | Compression options |
+| `my.borgthin.jobs.<name>.dateFormat` | string | `"+%Y-%m-%dT%H:%M:%S"` | Format passed to the date command |
+| `my.borgthin.jobs.<name>.environment` | attribute set of string | `{ }` | Extra environment variables to pass to borg |
+| `my.borgthin.jobs.<name>.extraArgs` | list of string | `[ "--iec" ]` | Extra args to pass to all borg commands |
+| `my.borgthin.jobs.<name>.extraCreateArgs` | list of string | `[ ]` | Extra args to pass to tcreate command |
+| `my.borgthin.jobs.<name>.lvs` | list of string | `null` | Thin LVs to backup (vg/lv format) |
+| `my.borgthin.jobs.<name>.passFile` | null or string | `null` | Path to file containing passphrase |
+| `my.borgthin.jobs.<name>.prune.keep` | attribute set of (signed integer or string) | `{ }` | Borg pruning params |
+| `my.borgthin.jobs.<name>.prune.pattern` | string | `"sh:${config.archivePrefix}*"` | Borg pattern to select archives for pruning |
+| `my.borgthin.jobs.<name>.repo` | string | `null` | borg repository URL |
+| `my.borgthin.jobs.<name>.timer.at` | string or list of string | `"5:00"` | systemd calendar time(s) to run backup at |
+| `my.borgthin.jobs.<name>.timer.persistent` | boolean | `false` | Persistent systemd timer |
+| `my.borgthin.lvmPackage` | package | `<derivation lvm2-2.03.39>` | Packge containing LVM tools |
+| `my.borgthin.package` | package | `inputs.borgthin.packages.${system}.borgthin` | borgthin package |
+| `my.borgthin.thinToolsPackage` | package | `<derivation thin-provisioning-tools-1.3.2>` | Package containing thin-provisioning-tools |
+
+## `build` — [`nixos/modules/build.nix`](../../nixos/modules/build.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.build.allHardware` | boolean | `false` | Whether to enable a lot of firmware and kernel modules for a wide range of hardware.Only applies to some build targets. |
+| `my.build.isDevVM` | boolean | `false` | Whether the system is a development VM. |
+| `my.buildAs` | open submodule of lazy attribute set of unspecified value | `{ }` | Attribute set of derivations used to set up the system. |
+
+## `common` — [`nixos/modules/common.nix`](../../nixos/modules/common.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.tmproot.persistence.config.users` | attribute set of (submodule) | `{ }` | A set of user submodules listing the files and directories to link to their respective user's home directories. Each attribute name should be the name of the user. For detailed usage, check the [documentation](https://github.com/nix-community/impermanence). |
+
+## `containers` — [`nixos/modules/containers.nix`](../../nixos/modules/containers.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.containers.instances` | attribute set of (submodule) | `{ }` | Individual containers. |
+| `my.containers.instances.<name>.autoStart` | boolean | `true` | Whether to start the container automatically at boot. |
+| `my.containers.instances.<name>.bindMounts` | attribute set of (submodule) | `{ }` | An extra list of directories that is bound to the container. |
+| `my.containers.instances.<name>.bindMounts.<name>.hostPath` | null or string | `"‹name›"` | Location of the host path to be mounted. |
+| `my.containers.instances.<name>.bindMounts.<name>.mountPoint` | string | `"‹name›"` | Mount point on the container file system. |
+| `my.containers.instances.<name>.bindMounts.<name>.readOnly` | boolean | `true` | Determine whether the mounted path will be accessed in read-only mode. |
+| `my.containers.instances.<name>.containerSystem` | absolute path | `"/nix/var/nix/profiles/system"` | Path to NixOS system configuration from within container. |
+| `my.containers.instances.<name>.hotReload` | boolean | `true` | Whether to apply new configuration by running `switch-to-configuration` instead of rebooting the container. |
+| `my.containers.instances.<name>.networking.bridge` | null or string | `null` | Network bridge to connect to. |
+| `my.containers.instances.<name>.networking.macVLAN` | null or string | `null` | Network interface to make MACVLAN interface from. |
+| `my.containers.instances.<name>.system` | absolute path | `"/nix/var/nix/profiles/per-container/‹name›/system"` | Path to NixOS system configuration. |
+| `my.containers.persistDir` | string | `"/persist/containers"` | Where to store container persistence data. |
+
+## `deploy-rs` — [`nixos/modules/deploy-rs.nix`](../../nixos/modules/deploy-rs.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.deploy.authorizedKeys.keyFiles` | list of absolute path | `[ .keys/deploy.pub ]` | SSH public key files to add to the default deployment user. |
+| `my.deploy.authorizedKeys.keys` | list of (optionally newline-terminated) single-line string | `[ ]` | SSH public keys to add to the default deployment user. |
+| `my.deploy.enable` | boolean | `true` | Whether to expose deploy-rs configuration for this system. |
+| `my.deploy.generate.containers.enable` | boolean | `true` | Whether to generate deploy-rs profiles for this system's containers. |
+| `my.deploy.generate.containers.keepGenerations` | unsigned integer, meaning >=0 | `10` | Number of generations to keep when cleaning up old deployments (0 to disable deletion on deployment). |
+| `my.deploy.generate.system.enable` | boolean | `true` | Whether to generate a deploy-rs profile for this system's config. |
+| `my.deploy.generate.system.keepGenerations` | unsigned integer, meaning >=0 | `10` | Number of generations to keep when cleaning up old deployments (0 to disable deletion on deployment). |
+| `my.deploy.generate.system.mode` | string | `"switch"` | switch-to-configuration mode. |
+| `my.deploy.node` | submodule | `{ }` | deploy-rs node configuration. |
+| `my.deploy.node.autoRollback` | null or boolean | `null` | Whether to roll back the profile if activation fails. |
+| `my.deploy.node.confirmTimeout` | null or 16 bit unsigned integer; between 0 and 65535 (both inclusive) | `null` | Timeout for confirming activation succeeded. |
+| `my.deploy.node.fastConnection` | null or boolean | `null` | Whether to copy the whole closure instead of using substitution. |
+| `my.deploy.node.hostname` | string | `""` | Hostname deploy-rs will connect to. |
+| `my.deploy.node.magicRollback` | null or boolean | `null` | Whether to roll back the profile if connectivity to the deployer is lost. |
+| `my.deploy.node.profiles` | attribute set of (submodule) | `{ }` | Profiles to deploy. |
+| `my.deploy.node.profiles.<name>.autoRollback` | null or boolean | `null` | Whether to roll back the profile if activation fails. |
+| `my.deploy.node.profiles.<name>.confirmTimeout` | null or 16 bit unsigned integer; between 0 and 65535 (both inclusive) | `null` | Timeout for confirming activation succeeded. |
+| `my.deploy.node.profiles.<name>.fastConnection` | null or boolean | `null` | Whether to copy the whole closure instead of using substitution. |
+| `my.deploy.node.profiles.<name>.magicRollback` | null or boolean | `null` | Whether to roll back the profile if connectivity to the deployer is lost. |
+| `my.deploy.node.profiles.<name>.path` | package | `""` | Derivation to build (should include activation script). |
+| `my.deploy.node.profiles.<name>.profilePath` | null or string | `null` | Path to profile location |
+| `my.deploy.node.profiles.<name>.sshOpts` | list of string | `[ ]` | Options deploy-rs will pass to ssh. Note: overriding at a lower level _merges_ options. |
+| `my.deploy.node.profiles.<name>.sshUser` | null or string | `null` | Username deploy-rs will deploy with. |
+| `my.deploy.node.profiles.<name>.sudo` | null or string | `null` | Command to elevate privileges with (used if the deployment user != profile user). |
+| `my.deploy.node.profiles.<name>.tempPath` | null or string | `null` | Path that deploy-rs will use for temporary files. |
+| `my.deploy.node.profiles.<name>.user` | null or string | `null` | Username deploy-rs will deploy with. |
+| `my.deploy.node.profilesOrder` | null or (list of string) | `null` | Order to deploy profiles in (remainder will be deployed in arbitrary order). |
+| `my.deploy.node.sshOpts` | list of string | `[ ]` | Options deploy-rs will pass to ssh. Note: overriding at a lower level _merges_ options. |
+| `my.deploy.node.sshUser` | null or string | `null` | Username deploy-rs will deploy with. |
+| `my.deploy.node.sudo` | null or string | `null` | Command to elevate privileges with (used if the deployment user != profile user). |
+| `my.deploy.node.tempPath` | null or string | `null` | Path that deploy-rs will use for temporary files. |
+| `my.deploy.node.user` | null or string | `null` | Username deploy-rs will deploy with. |
+
+## `dynamic-motd` — [`nixos/modules/dynamic-motd.nix`](../../nixos/modules/dynamic-motd.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.dynamic-motd.enable` | boolean | `true` | Whether to enable the dynamic message of the day PAM module. |
+| `my.dynamic-motd.script` | null or strings concatenated with "\n" | `null` | Script that generates message of the day. |
+| `my.dynamic-motd.services` | list of string | `[ "login" "sshd" ]` | PAM services to enable the dynamic message of the day module for. |
+
+## `firewall` — [`nixos/modules/firewall.nix`](../../nixos/modules/firewall.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.firewall.enable` | boolean | `true` | Whether to enable the nftables-based firewall. |
+| `my.firewall.extraRules` | strings concatenated with "\n" | `""` | Arbitrary additional nftables rules. |
+| `my.firewall.nat.enable` | boolean | `true` | Whether to enable IP forwarding and NAT. |
+| `my.firewall.nat.externalInterface` | null or string | `null` | The name of the external network interface. |
+| `my.firewall.nat.forwardPorts` | (list of (submodule)) or attribute set of list of (submodule) | `[ ]` | IPv4 port forwards |
+| `my.firewall.tcp.allowed` | list of (16 bit unsigned integer; between 0 and 65535 (both inclusive) or string) | `[ ]` | TCP ports to open. |
+| `my.firewall.trustedInterfaces` | list of string | `[ ]` | Traffic coming in from these interfaces will be accepted unconditionally. Traffic from the loopback (lo) interface will always be accepted. |
+| `my.firewall.udp.allowTraceroute` | boolean | `true` | Whethor or not to add a rule to accept UDP traceroute packets. |
+| `my.firewall.udp.allowed` | list of (16 bit unsigned integer; between 0 and 65535 (both inclusive) or string) | `[ ]` | UDP ports to open. |
+
+## `gui` — [`nixos/modules/gui`](../../nixos/modules/gui)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.gui.enable` | boolean | `true` | Whether to enable GUI system options. |
+
+## `l2mesh` — [`nixos/modules/l2mesh.nix`](../../nixos/modules/l2mesh.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.vpns.l2.pskFiles` | attribute set of string | `{ }` | PSK files for secured meshes. |
+
+## `librespeed` — [`nixos/modules/librespeed`](../../nixos/modules/librespeed)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.librespeed.backend.enable` | boolean | `false` | Whether to enable librespeed backend. |
+| `my.librespeed.backend.extraSettingsFile` | null or string | `null` | Extra settings file. |
+| `my.librespeed.backend.settings` | attribute set of unspecified value | `{ }` | Backend settings. |
+| `my.librespeed.frontend.servers` | list of attribute set of unspecified value | `{ }` | Server configs. |
+| `my.librespeed.frontend.webroot` | package | — | Frontend webroot. |
+
+## `netboot` — [`nixos/modules/netboot`](../../nixos/modules/netboot)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.netboot.client.configurationLimit` | unsigned integer, meaning >=0 | `10` | Max generations to show in boot menu. |
+| `my.netboot.client.enable` | boolean | `false` | Whether network booting should be enabled. |
+| `my.netboot.server.allowedPrefixes` | list of string | `null` | Prefixes clients should be allowed to connect from (NFS). |
+| `my.netboot.server.enable` | boolean | `false` | Whether a netboot server should be enabled. |
+| `my.netboot.server.host` | string | `config.networking.fqdn` | Hostname clients should connect to over HTTP / NFS. |
+| `my.netboot.server.installer.storeSize` | string | `"16GiB"` | Total allowed writable size of store. |
+| `my.netboot.server.instances` | list of string | `[ ]` | Systems to hold boot files for. |
+| `my.netboot.server.ip` | string | `null` | IP clients should connect to via TFTP. |
+
+## `nginx-sso` — [`nixos/modules/nginx-sso.nix`](../../nixos/modules/nginx-sso.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.nginx-sso.configuration` | attribute set of unspecified value | `{ }` | nginx-sso configuration. |
+| `my.nginx-sso.enable` | boolean | `false` | Whether to enable custom nginx-sso. |
+| `my.nginx-sso.extraConfigFile` | null or string | `null` | Path to configuration (e.g. for secrets). |
+| `my.nginx-sso.includes.baseURL` | string | `null` | Base URL for redirects. |
+| `my.nginx-sso.includes.endpoint` | string | `"http://localhost:8082"` | Upstream for proxied auth requests. |
+| `my.nginx-sso.includes.instances` | attribute set of (submodule) | `{ }` | nginx includes instances. |
+| `my.nginx-sso.includes.instances.<name>.auth.path` | string | `"/sso-auth"` | HTTP path for SSO auth. |
+| `my.nginx-sso.includes.instances.<name>.auth.redirect` | string | `"$scheme://$http_host$request_uri"` | URL to redirect to upon successful login. |
+| `my.nginx-sso.includes.instances.<name>.logout.path` | string | `"/sso-logout"` | HTTP path for SSO logout. |
+| `my.nginx-sso.includes.instances.<name>.logout.redirect` | string | `"$scheme://$http_host/"` | URL to redirect to upon successful logout. |
+| `my.nginx-sso.package` | package | `<derivation nginx-sso-0.27.7>` | nginx-sso package to use. |
+
+## `nvme` — [`nixos/modules/nvme`](../../nixos/modules/nvme)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.nvme.boot.address` | string | `null` | Address of NVMe-oF target. |
+| `my.nvme.boot.nqn` | null or string | `null` | NQN to connect to on boot |
+| `my.nvme.uuid` | null or string | `null` | NVMe host ID |
+
+## `pdns` — [`nixos/modules/pdns.nix`](../../nixos/modules/pdns.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.pdns.auth.bind.file-records.sshKey` | null or string | `null` | SSH public key for file record update user. |
+| `my.pdns.auth.bind.options.also-notify` | list of string | `[ ]` | List of additional address to send DNS NOTIFY messages to. |
+| `my.pdns.auth.bind.zones` | attribute set of (submodule) | `{ }` | BIND-style zones definitions. |
+| `my.pdns.auth.bind.zones.<name>.also-notify` | list of string | `[ ]` | List of additional address to send DNS NOTIFY messages to. |
+| `my.pdns.auth.bind.zones.<name>.masters` | list of string | `[ ]` | List of masters to retrieve data from (as slave). |
+| `my.pdns.auth.bind.zones.<name>.path` | absolute path | `null` | Path to zone file. |
+| `my.pdns.auth.bind.zones.<name>.template` | boolean | `true` | Whether to run the zone contents through a template for post-processing. |
+| `my.pdns.auth.bind.zones.<name>.text` | null or strings concatenated with "\n" | `null` | Inline content of the zone file. |
+| `my.pdns.auth.bind.zones.<name>.type` | one of "master", "slave", "native" | `"native"` | Zone type. |
+| `my.pdns.auth.enable` | boolean | `false` | Whether to enable PowerDNS authoritative nameserver. |
+| `my.pdns.auth.extraSettingsFile` | null or string | `null` | Path to extra settings (e.g. for secrets). |
+| `my.pdns.auth.settings` | attribute set of (null or signed integer or string or boolean or absolute path or list of (signed integer or string or boolean or absolute path)) | `{ }` | Authoritative server settings. |
+| `my.pdns.recursor.enable` | boolean | `false` | Whether to enable PowerDNS recursive nameserver. |
+| `my.pdns.recursor.extraSettingsFile` | null or string | `null` | Path to extra settings (e.g. for secrets). |
+
+## `secrets` — [`nixos/modules/secrets.nix`](../../nixos/modules/secrets.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.secrets.files` | attribute set of unspecified value | `{ }` | Secrets to decrypt with agenix. |
+| `my.secrets.key` | null or string | `null` | Public key that secrets for this system should be encrypted for. |
+| `my.secrets.vmKeyPath` | string | `"/tmp/xchg/dev.key"` | Path to dev key when in a dev VM. |
+
+## `server` — [`nixos/modules/server.nix`](../../nixos/modules/server.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.server.enable` | boolean | `false` | Whether to enable common configuration for servers. |
+
+## `spdk` — [`nixos/modules/spdk.nix`](../../nixos/modules/spdk.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.spdk.config.subsystems` | attribute set of list of (submodule) | `{ }` | Subsystem config / RPCs. |
+| `my.spdk.config.subsystems.<name>.*.method` | string | `null` | RPC method name. |
+| `my.spdk.config.subsystems.<name>.*.params` | attribute set of unspecified value | `{ }` | RPC params |
+| `my.spdk.debugCommands` | strings concatenated with "\n" | `""` | Commands to run with the spdk-debug script. |
+| `my.spdk.enable` | boolean | `false` | Whether to enable SPDK target. |
+| `my.spdk.extraArgs` | string | `""` | Extra arguments to pass to spdk_tgt. |
+
+## `tmproot` — [`nixos/modules/tmproot.nix`](../../nixos/modules/tmproot.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.tmproot.enable` | boolean | `true` | Whether to enable tmproot. |
+| `my.tmproot.persistence.config` | submodule | `{ }` | Persistence configuration |
+| `my.tmproot.persistence.dir` | null or string | `"/persist"` | Path where persisted files are stored. |
+| `my.tmproot.size` | string | `"2G"` | Size of tmpfs root |
+| `my.tmproot.unsaved.ignore` | list of string | `[ ]` | Path prefixes to ignore if unsaved. |
+| `my.tmproot.unsaved.showMotd` | boolean | `true` | Whether to show unsaved files with `dynamic-motd`. |
+
+## `user` — [`nixos/modules/user.nix`](../../nixos/modules/user.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.user.config` | submodule | `{ }` | User definition (as `users.users.*`). |
+| `my.user.enable` | boolean | `true` | Whether to create a primary user. |
+| `my.user.homeConfig` | Home Manager module | `{ }` | Home configuration (as `home-manager.users.*`) |
+| `my.user.passwordSecret` | null or string | `"user-passwd.txt"` | Name of user password secret. |
+| `my.user.tmphome` | boolean | `true` | Whether to persist home directory files under tmproot |
+
+## `vms` — [`nixos/modules/vms.nix`](../../nixos/modules/vms.nix)
+
+| Option | Type | Default | Description |
+|---|---|---|---|
+| `my.vms.instances` | attribute set of (submodule) | `{ }` | VM instances. |
+| `my.vms.instances.<name>.autoStart` | boolean | `true` | Whether to start the VM automatically at boot. |
+| `my.vms.instances.<name>.boot` | string or (attribute set of unspecified value) convertible to it | `{ menu = "on"; splash-time = 5000; }` | Boot options. |
+| `my.vms.instances.<name>.cleanShutdown.enabled` | boolean | `true` | Whether to attempt to cleanly shut down the guest. |
+| `my.vms.instances.<name>.cleanShutdown.timeout` | unsigned integer, meaning >=0 | `30` | Clean shutdown timeout (in seconds). |
+| `my.vms.instances.<name>.cpu` | string | `"host"` | QEMU CPU model. |
+| `my.vms.instances.<name>.drives` | list of (submodule) | `[ ]` | Drives to attach to VM. |
+| `my.vms.instances.<name>.drives.*.backend` | string or (attribute set of unspecified value) convertible to it | `{ }` | Backend blockdev options. |
+| `my.vms.instances.<name>.drives.*.format` | string or (attribute set of unspecified value) convertible to it | `{ }` | Format blockdev options. |
+| `my.vms.instances.<name>.drives.*.formatBackendProp` | string | `"file"` | Property that references the backend blockdev. |
+| `my.vms.instances.<name>.drives.*.frontend` | string | `"virtio-blk"` | Frontend device driver. |
+| `my.vms.instances.<name>.drives.*.frontendOpts` | string or (attribute set of unspecified value) convertible to it | `{ }` | Frontend device options. |
+| `my.vms.instances.<name>.drives.*.name` | string | `null` | Drive name. |
+| `my.vms.instances.<name>.enableKVM` | boolean | `true` | Whether to enable KVM. |
+| `my.vms.instances.<name>.enableUEFI` | boolean | `true` | Whether to enable UEFI. |
+| `my.vms.instances.<name>.hostDevices` | attribute set of (submodule) | `{ }` | Host PCI devices to pass to the VM. |
+| `my.vms.instances.<name>.hostDevices.<name>.bindVFIO` | boolean | `true` | Whether to automatically bind the device to vfio-pci. |
+| `my.vms.instances.<name>.hostDevices.<name>.extraOptions` | string or (attribute set of unspecified value) convertible to it | `{ }` | Extra QEMU options for the vfio-pci QEMU device. |
+| `my.vms.instances.<name>.hostDevices.<name>.hostBDF` | string | `null` | PCI BDF of host device. |
+| `my.vms.instances.<name>.hostDevices.<name>.index` | unsigned integer, meaning >=0 | `null` | Index of device in guest (for root port chassis and slot). |
+| `my.vms.instances.<name>.machine` | string | `"q35"` | QEMU machine type. |
+| `my.vms.instances.<name>.memory` | unsigned integer, meaning >=0 | `1024` | Amount of RAM (mebibytes). |
+| `my.vms.instances.<name>.networks` | attribute set of (submodule) | `{ }` | Networks to attach VM to. |
+| `my.vms.instances.<name>.networks.<name>.bridge` | null or string | `"‹name›"` | Network bridge to connect to (null to not attach to bridge). |
+| `my.vms.instances.<name>.networks.<name>.extraOptions` | string or (attribute set of unspecified value) convertible to it | `{ }` | Extra QEMU options to set for the NIC. |
+| `my.vms.instances.<name>.networks.<name>.ifname` | string | `"vm-‹name›"` | TAP device to create / use. |
+| `my.vms.instances.<name>.networks.<name>.mac` | string | `null` | Guest MAC address. |
+| `my.vms.instances.<name>.networks.<name>.model` | string | `"virtio-net"` | Device type for network interface. |
+| `my.vms.instances.<name>.networks.<name>.tapFD` | null or (unsigned integer, meaning >=0) | `null` | FD to use to pass existing TAP device. |
+| `my.vms.instances.<name>.networks.<name>.waitOnline` | boolean or string | `true` | Whether to wait for networkd to consider the bridge / existing TAP device online. Pass a string to set the OPERSTATE will wait for. |
+| `my.vms.instances.<name>.qemuBin` | absolute path | `"/nix/store/w4yhckm5wyvml3pqw8ai5fl174j14nrb-qemu-host-cpu-only-11.0.0/bin/qemu-kvm"` | Path to QEMU executable. |
+| `my.vms.instances.<name>.qemuFlags` | list of string | `[ ]` | Additional flags to pass to QEMU. |
+| `my.vms.instances.<name>.smp.cpus` | unsigned integer, meaning >=0 | `1` | Number of CPU cores. |
+| `my.vms.instances.<name>.smp.threads` | unsigned integer, meaning >=0 | `1` | Number of threads per core. |
+| `my.vms.instances.<name>.spice.enable` | boolean | `true` | Whether to enable SPICE. |
+| `my.vms.instances.<name>.uuid` | string | `null` | QEMU machine UUID. |
+| `my.vms.instances.<name>.vga` | string | `"virtio"` | VGA card type. |
+| `my.vms.ovmfPackage` | package | `<derivation OVMF-202602>` | OVMF package. |

docs/remote/README.md

@@ -0,0 +1,12 @@
+# Remote boxes
+
+The "remote" group covers the boxes that live outside the `colony` and `home` sites: the two
+edge VPSes (`britway` in London, `britnet` in Birmingham) and the `kelder` site — a secondary
+server at a remote location, linked back to colony over WireGuard and acting as a NixOS
+container host.
+
+| Box | What it is |
+| --- | --- |
+| [`britway`](britway.md) | Vultr VPS (London, `lon1`): Headscale control plane, Tailscale exit node, BGP edge, nginx |
+| [`britnet`](britnet.md) | VPS (Birmingham, `bhx1`): Tailscale exit node / WireGuard hub |
+| [`kelder`](kelder/README.md) | Secondary home server (`hentai.engineer`): container host, Samba, DDNS (containers on its page) |

docs/remote/britnet.md

@@ -0,0 +1,41 @@
+# britnet
+
+A small VPS in Birmingham (`bhx1`) acting as a second Tailscale/WireGuard egress point — a
+narrower gateway role than [`britway`](britway.md) (no control plane, no BGP).
+
+- **Source:** [`nixos/boxes/britnet.nix`](../../nixos/boxes/britnet.nix)
+- **Host:** VPS (Birmingham, `bhx1`; provider uplink assignment `allhost`)
+- **nixpkgs:** `mine`
+
+## Platform
+
+| Component | Allocation |
+|---|---|
+| Virtualisation | KVM/QEMU guest |
+| Compute | 2 vCPUs and 2 GiB RAM |
+| Storage | 32 GiB virtio disk with separate ext4 filesystems for `/boot`, `/nix` and `/persist`; root is tmpfs |
+
+## Role
+
+- **Tailscale exit node** — logs into the headscale on [`britway`](britway.md)
+  (`--login-server=https://hs.nul.ie`) with `--advertise-exit-node`.
+- **WireGuard hub** — `wg0` listens on UDP 51820 on the `vpn` assignment, with a single static
+  peer.
+- **NAT gateway** — traffic arriving on `tailscale0`/`wg0` is forwarded out `veth0` and SNATed
+  to the `allhost` v4/v6 addresses.
+
+## Network assignments
+
+See the consolidated [network assignments](../networking.md#box-assignments) table (this box: `britnet`).
+
+## Networking
+
+- The provider interface is renamed to `veth0` by MAC. Its IPv6 default gateway sits off-subnet, so
+  a link-scope route is added to reach it.
+- `wg0` is a networkd WireGuard netdev keyed from `britnet/wg.key`; RA is disabled on it.
+- Upstream DNS is hardcoded to Cloudflare (`1.1.1.1` / `1.0.0.1`).
+- `iperf3` runs with an open port for bandwidth testing.
+
+## Notable config files
+
+- [`nixos/boxes/britnet.nix`](../../nixos/boxes/britnet.nix) — the whole box (single file).

docs/remote/britway.md

@@ -0,0 +1,54 @@
+# britway
+
+A Vultr VPS in London (`lon1`) acting as the network edge node: the self-hosted Tailscale
+control plane, a tailnet exit node, and the BGP speaker for AS211024.
+
+- **Source:** [`nixos/boxes/britway/`](../../nixos/boxes/britway)
+- **Host:** VPS at Vultr (London, `lon1`)
+- **nixpkgs:** `mine`
+
+## Platform
+
+| Component | Allocation |
+|---|---|
+| Virtualisation | Vultr VC2 virtual guest on a QEMU-compatible platform |
+| Compute | 2 vCPUs and 2 GiB RAM |
+| Storage | 65 GiB virtio disk with separate ext4 filesystems for `/boot`, `/nix` and `/persist`; root is tmpfs |
+
+## Role
+
+- **Headscale** — the self-hosted Tailscale control plane at `hs.nul.ie`; every other box's
+  `tailscaled` logs in here (`--login-server=https://hs.nul.ie`). Google OIDC for auth,
+  SQLite state, MagicDNS under `ts.nul.ie`, and split DNS pointing the colony/home domains
+  at their internal resolvers.
+- **Tailscale exit node** — advertises `--advertise-exit-node` plus routes to the home v4/v6
+  prefixes; tailnet traffic is SNATed out `veth0` (v4 to the Vultr public IP, v6 to the
+  `as211024` mesh address).
+- **BGP edge** — `bird2` speaks BGP as AS211024 to Vultr transit (AS64515, separate v4/v6
+  sessions authenticated with a password from `britway/bgp-password-vultr.conf`) and exports
+  everything to a `bgp.tools` monitoring session. It originates the internal, colony and home
+  IPv6 prefixes documented in [networking](../networking.md#domains).
+- **nginx** — reverse proxy fronting headscale (`hs.nul.ie` → `localhost` headscale port),
+  with a wildcard ACME cert for `nul.ie` issued via Cloudflare DNS.
+
+## Network assignments
+
+See the consolidated [network assignments](../networking.md#box-assignments) table (this box: `britway`).
+
+## Networking
+
+- Two assignments: `vultr` on the provider interface `veth0` (renamed by MAC), and `as211024`
+  on the `l2mesh` VXLAN interface (`my.vpns.l2`) — member of the shared mesh (see
+  [The AS211024 L2 mesh](../networking.md#the-as211024-l2-mesh)).
+- Static routes steer colony/home v4 traffic over the `as211024` mesh. A separate `ts-extra`
+  routing table with a policy rule on `tailscale0` ingress sends Tailscale-sourced v6
+  traffic for colony via `estuary`, while the box's own v6 uses WAN.
+- The firewall trusts the `as211024` prefixes (`lib.my.c.as211024.nftTrust`) and
+  `tailscale0`; `iperf3` runs with an open port for bandwidth testing.
+
+## Notable config files
+
+- [`nixos/boxes/britway/default.nix`](../../nixos/boxes/britway/default.nix) — system, assignments, networkd, firewall/SNAT.
+- [`nixos/boxes/britway/bgp.nix`](../../nixos/boxes/britway/bgp.nix) — `bird2` config (Vultr transit, `bgp.tools`).
+- [`nixos/boxes/britway/nginx.nix`](../../nixos/boxes/britway/nginx.nix) — nginx vhosts + ACME.
+- [`nixos/boxes/britway/tailscale.nix`](../../nixos/boxes/britway/tailscale.nix) — headscale + the tailnet node itself.

docs/remote/kelder/README.md

@@ -0,0 +1,61 @@
+# kelder
+
+Secondary home server at a remote site, domain `hentai.engineer`. Linked back to colony over
+WireGuard and acting as a NixOS container host (like `shill`/`sfh`).
+
+- **Source:** [`nixos/boxes/kelder/`](../../../nixos/boxes/kelder)
+- **Host:** physical (Intel; LTS kernel, `kvm-intel`, IOMMU on)
+- **nixpkgs:** `mine`
+
+## Role
+
+- **Container host** — runs two NixOS containers on the `ctrs` bridge
+  (`my.containers.instances`): `kelder-acquisition` and `kelder-spoder` (below).
+- **Public services via colony** — a WireGuard tunnel (`estuary` netdev) connects to colony's
+  `estuary` box, which DNATs public traffic to kelder's tunneled assignment; connection-mark-based
+  policy routing sends replies back through the tunnel while ordinary traffic uses the LAN.
+  kelder's own NAT forwards `http`/`https` on to `kelder-spoder`.
+- **Nextcloud host** — served from the `kelder-spoder` container.
+- **Samba** — the `storage` share backed by `/mnt/storage`, with `nmbd` and `samba-wsdd` for
+  Windows discovery.
+- **DDNS** — a `ddns-update` timer runs `dns_update.py` periodically to sync the
+  `hentai.engineer` and `kelder-local.hentai.engineer` Cloudflare records with the address on
+  `et1g0`.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `kelder`).
+
+## Containers
+
+| Container | Role |
+| --- | --- |
+| [`kelder-acquisition`](containers/kelder-acquisition.md) | Media stack (Transmission over AirVPN, Jackett/Radarr/Sonarr, Jellyfin) |
+| [`kelder-spoder`](containers/kelder-spoder.md) | Nextcloud + nginx reverse proxy |
+
+The containers are not deploy targets (`my.deploy.enable = false`); they're managed through
+the host.
+
+## Networking
+
+- LAN on `et1g0` (renamed by MAC) with DHCP and MTU 1460 (`lib.my.c.kelder.ipv4MTU`); the
+  kelder v4 prefixes are masqueraded out of it.
+- The `estuary` WireGuard peer is combined with rules that keep LAN traffic on the main table and
+  only route tunnel-marked or owned traffic through the tunnel's dedicated table.
+
+## Services
+
+- `netdata` (proxied as `monitor.hentai.engineer` by `kelder-spoder`), `smartd`, `fstrim`,
+  LVM thin provisioning.
+- `minecraft-server` is present but **disabled** (`enable = false`); the firewall still opens
+  25565 tcp/udp.
+- Primary user `kontent` (in the `storage`/`media` groups).
+- Sets `system.nixos.distroName = "KelderOS"`, a custom Plymouth theme and an `amogus-beep`
+  boot jingle ([`boot.nix`](../../../nixos/boxes/kelder/boot.nix)).
+
+## Notable config files
+
+- [`nixos/boxes/kelder/default.nix`](../../../nixos/boxes/kelder/default.nix) — system, assignments, tunnel, NAT, containers.
+- [`nixos/boxes/kelder/boot.nix`](../../../nixos/boxes/kelder/boot.nix) — Plymouth theme + boot beep.
+- [`nixos/boxes/kelder/containers/`](../../../nixos/boxes/kelder/containers) — the two container definitions.
+- [`nixos/boxes/kelder/dns_update.py`](../../../nixos/boxes/kelder/dns_update.py) — Cloudflare DDNS script.

docs/remote/kelder/containers/kelder-acquisition.md

@@ -0,0 +1,45 @@
+# kelder-acquisition
+
+The media acquisition stack for the kelder site — Transmission (forced over VPN), the *arrs
+and Jellyfin in one NixOS container.
+
+- **Source:** [`nixos/boxes/kelder/containers/acquisition/`](../../../../nixos/boxes/kelder/containers/acquisition)
+- **Host:** NixOS container on [`kelder`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+### Transmission
+
+`transmission_4` is bound to the VPN wait-online unit and uses AirVPN's forwarded peer port. Upload,
+download and seed-ratio limits are configured in the service source. Downloads use
+`/mnt/media/downloads/torrents`, backed by the host's `/mnt/storage/media`.
+
+### Media services
+
+Jackett, Radarr and Sonarr share the `media` group with a group-writable umask. Jellyfin uses the
+host's bind-mounted `/dev/dri` with `intel-vaapi-driver` / `intel-ocl`; its user belongs to
+`render`.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../networking.md#box-assignments) table (this box: `kelder-acquisition`).
+
+## Networking
+
+- `internal` assignment (name `acquisition-ctr`) on the host's `ctrs` bridge, MTU 1460 to
+  match the site WAN.
+- All non-site traffic goes over an AirVPN WireGuard tunnel (`vpn` netdev, AirVPN IE endpoint).
+  Policy rules keep traffic to and from the kelder prefixes on the main table and push everything
+  else through the VPN's dedicated table.
+- An nftables input chain drops new TCP connections from the VPN interface except the
+  Transmission peer port; the web UI ports (9091 Transmission, 9117 Jackett, 7878 Radarr,
+  8989 Sonarr, 8096 Jellyfin) are accepted from the site. When built as a dev VM, those ports
+  are forwarded to the host.
+- Sonarr still needs the EOL .NET 6 runtime, allowed via
+  `nixpkgs.config.permittedInsecurePackages`.
+
+## Notable config files
+
+- [`nixos/boxes/kelder/containers/acquisition/default.nix`](../../../../nixos/boxes/kelder/containers/acquisition/default.nix) — services and users.
+- [`nixos/boxes/kelder/containers/acquisition/networking.nix`](../../../../nixos/boxes/kelder/containers/acquisition/networking.nix) — AirVPN tunnel + firewall.

docs/remote/kelder/containers/kelder-spoder.md

@@ -0,0 +1,50 @@
+# kelder-spoder
+
+The web container for the kelder site: Nextcloud plus an nginx (OpenResty) reverse proxy for
+the site's services.
+
+- **Source:** [`nixos/boxes/kelder/containers/spoder/`](../../../../nixos/boxes/kelder/containers/spoder)
+- **Host:** NixOS container on [`kelder`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+- **Nextcloud** (`nextcloud32`) at `cloud.hentai.engineer` (trusted alias
+  `cloud-local.hentai.engineer`), SQLite backend, data in `/mnt/storage/nextcloud`
+  (`/mnt/storage` is bind-mounted from the host).
+- **nginx reverse proxy** (`openresty`) terminating TLS for the site's public vhosts, with a
+  wildcard ACME cert for `hentai.engineer` via Cloudflare DNS. The kelder host forwards
+  `http`/`https` to this container; uploads are unlimited (`clientMaxBodySize = 0`) for
+  Nextcloud's sake.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../networking.md#box-assignments) table (this box: `kelder-spoder`).
+
+## Proxy vhosts
+
+All under `hentai.engineer`, each with a `*-local` alias:
+
+| vhost | Target | Auth |
+| --- | --- | --- |
+| `monitor` | `netdata` on the kelder host (:19999) | `htpasswd` |
+| `kontent` | Jellyfin on `kelder-acquisition` (:8096, incl. websocket) | — |
+| `torrents` | Transmission on `kelder-acquisition` (:9091) | `htpasswd` |
+| `jackett` | Jackett on `kelder-acquisition` (:9117) | `htpasswd` |
+| `radarr` | Radarr on `kelder-acquisition` (:7878) | `htpasswd` |
+| `sonarr` | Sonarr on `kelder-acquisition` (:8989) | `htpasswd` |
+| `cloud` | Nextcloud (local) | — |
+
+An `init_worker_by_lua` timer polls `v4.ident.me` periodically to track the site's public IP; it
+feeds `localRedirect` rewrites (bounce public-IP clients to the `*-local` name) that
+are currently **disabled** (commented out — Virgin Media filters DNS answers containing local
+IPs, so the split doesn't work as intended).
+
+## Networking
+
+- `internal` assignment (name `spoder-ctr`) on the host's `ctrs` bridge, MTU 1420.
+
+## Notable config files
+
+- [`nixos/boxes/kelder/containers/spoder/default.nix`](../../../../nixos/boxes/kelder/containers/spoder/default.nix) — Nextcloud + ACME.
+- [`nixos/boxes/kelder/containers/spoder/nginx.nix`](../../../../nixos/boxes/kelder/containers/spoder/nginx.nix) — reverse proxy vhosts.

docs/sites/colony/README.md

@@ -0,0 +1,32 @@
+# colony
+
+The hosted dedicated server in Amsterdam (`ams1`) and the public-facing half of
+the boxes: almost everything reachable from the internet lives here.
+
+- **Internal domain:** `ams1.int.nul.ie` (`lib.my.c.colony.domain`)
+- **Public domain:** `nul.ie` — public services are published as `*.nul.ie`
+- **Source:** [`nixos/boxes/colony/`](../../../nixos/boxes/colony)
+
+## Networking
+
+`colony` separates the host, VMs, `shill` containers and `whale2` OCI workloads onto dedicated
+networks behind [`estuary`](estuary.md), which terminates the public addressing. The canonical
+prefixes and routing overview are in the [`colony` section of networking.md](../../networking.md#colony).
+
+## Boxes
+
+| Box | Role |
+|---|---|
+| [`colony`](colony.md) | Physical VM host (AMD, KVM, LVM-thin, `borgthin` backups → rsync.net) |
+| [`estuary`](estuary.md) | Edge router: WAN, firewall/NAT, DNS, BGP (AS211024), WireGuard |
+| [`shill`](shill/README.md) | NixOS container host (most applications; per-container pages under `shill/`) |
+| [`whale2`](whale2.md) | podman/OCI game-server host |
+| [`git`](git.md) | Gitea + Gitea Actions runner |
+| [`mail`](mail.md) | Debian VM running mailcow (not NixOS) |
+| [`darts`](darts.md) | Third-party/customer VM (not NixOS) |
+
+The applications running on `shill` are listed on its own page — see
+[shill/README.md](shill/README.md#containers).
+
+`mail` and `darts` are host-defined VMs whose guest operating systems are managed out of band; their
+pages document only what this repository controls.

docs/sites/colony/colony.md

@@ -0,0 +1,110 @@
+# colony
+
+The physical dedicated server in Amsterdam (`ams1`) and the VM host for
+everything at the colony site.
+
+- **Source:** [`nixos/boxes/colony/default.nix`](../../../nixos/boxes/colony/default.nix)
+  (VM instances in [`nixos/boxes/colony/vms/default.nix`](../../../nixos/boxes/colony/vms/default.nix))
+- **Host:** bare metal (this *is* the physical box)
+- **nixpkgs:** `mine-stable`
+
+## Hardware
+
+| Component | Inventory |
+|---|---|
+| Platform | ASRock Rack X570D4U server board |
+| CPU | AMD Ryzen 9 5950X (16 cores / 32 threads) |
+| Memory | 128 GiB |
+| NVMe storage | Three 2 TB Samsung SSD 980 PRO devices providing the NVMe-backed LVM thin pool and data LVs |
+| Bulk storage | Three 12 TB WD120EDBZ disks and one 18 TB WD180EDGZ disk for the bulk LVM volumes |
+| Boot | SanDisk USB device holding the EFI system partition |
+| Network / management | Two Intel I210 Gigabit Ethernet controllers, one passed through to `estuary`; ASPEED BMC graphics and console |
+
+## Role
+
+Bare-metal AMD host. It does little application work itself — its job is to run
+the VMs and provide them with storage, networking and backups.
+
+### Virtualisation
+
+The `my.vms` module drives QEMU/KVM with `kvm-amd` and IOMMU enabled. Each `my.vms.instances` entry
+becomes a `vm@<name>` systemd service with UEFI, QMP/monitor sockets under `/run/vms/<name>/`, TAP
+networking and optional `hostDevices` passthrough through `vfio-pci`. `estuary` receives the WAN NIC
+this way.
+
+### Storage
+
+All three NVMe SSDs and all four SATA HDDs are physical volumes in one `main` VG. Separate pools
+and standalone RAID LVs keep workloads on the appropriate media:
+
+| Layer | Physical layout | Main consumers |
+|---|---|---|
+| `nvme-tpool` | Thin-pool data is RAID 0 across the three NVMe SSDs; thin metadata is RAID 1 on two of them. The data itself has no redundancy. | Host `/nix` and `/persist`; VM system and persistence disks; fast data LVs such as `minio`, `oci`, `git`, `gitea-actions-cache`, `nix-cache` and `jam` |
+| `hdds-tpool` | Thin-pool data is RAID 5 across the three 12 TB HDDs; thin metadata is RAID 1 on two NVMe SSDs. | `media`, passed to `shill`, and `backup`, mounted by the host at `/mnt/backup` |
+| `darts-media` | Standalone RAID 5 LV spanning all four HDDs. | Bulk storage passed to `darts` |
+| `darts-ext` | Standalone linear LV using the remaining capacity of the 18 TB HDD. | Expansion storage passed to `darts` |
+
+`media` and `backup` are thin-provisioned, so their virtual capacities are not additive physical
+capacity and overcommit `hdds-tpool`. VM disks built with `lib.my.vm.disk` are named
+`vm-<name>-<disk>` in `main`; `lib.my.vm.lvmDisk` attaches the named data LVs.
+
+The initrd activates only `colony-nix` and `colony-persist`. This avoids checking and activating all
+of the storage before switching root; `lvm-activate-main.service` activates the remaining LVs before
+local filesystems and VMs need them.
+
+### Backups
+
+`my.borgthin` job `main` snapshots host and VM persistence/data LVs into `/mnt/backup/main`.
+`borgthin-rsync.service` copies the repository to rsync.net and `rsync-lvm-meta.service` sends the
+LVM metadata; both run at idle priority after the Borg job.
+
+### Monitoring
+
+Netdata uses FreeIPMI while ignoring the VCCM sensor. The box also runs `smartd` with logs under
+`/var/log/smartd`, `rasdaemon`, and `fstrim` before the backup job.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `colony`).
+
+## Networking
+
+- Two bridges: `base` (the colony base network, shared with `estuary`) and
+  `vms` (the VM network). Dummy interfaces (`base0`, `vms0`) keep the bridges
+  up in networkd's eyes so dependent VMs can start.
+- `colony` sends RAs on `vms` (DNS = `estuary`'s base address) and carries
+  static routes for the downstream prefixes: `ctrs` via `shill`, `oci` via
+  `whale2`, plus the Tailscale, `qclk` and `jam` prefixes via `shill`.
+- `estuary` is the default gateway (via the `base` bridge); `colony`'s own public-facing address is
+  its `internal` assignment (alt name `vm`).
+- The customer VMs attach to dedicated TAP devices (`vm-mail`, `vm-darts`)
+  which are **not** bridged: networkd puts the point-to-point /32
+  (`lib.my.c.colony.custRouting`) and the customer's IPv6 /64 on each, sends
+  RAs, and link-routes the customer's public /32 down the tap.
+- `my.firewall` trusts the `vms` bridge, DNATs the shared
+  `lib.my.c.colony.firewallForwards` list for traffic addressed to `estuary`'s
+  public IP (so the port forwards also work from inside), and forwards the
+  customer prefixes through with minimal filtering ("trust for now").
+
+## VMs
+
+Declared in `my.vms.instances` (`cpus`/`threads` are QEMU `smp` values):
+
+| VM | Cores | Threads | Memory | Network | Disks |
+|---|---|---|---|---|---|
+| `estuary` | 2 | 2 | 3 GiB | `base` | `esp` / `nix` / `persist` LVs + WAN NIC passthrough |
+| `shill` | 12 | 2 | 40 GiB | `vms` | `esp` / `nix` / `persist` + `media` / `minio` / `nix-cache` / `jam` LVs |
+| `whale2` | 8 | 2 | 16 GiB | `vms` | `esp` / `nix` / `persist` + `oci` LV |
+| `git` | 12 | 2 | 40 GiB | `vms` | `esp` / `nix` / `persist` / `oci` + `git` / `gitea-actions-cache` LVs |
+| `mail` | 3 | 2 | 6 GiB | `vm-mail` tap | `root` / `data` LVs |
+| `darts` | 4 | 2 | 16 GiB | `vm-darts` tap | `root` LV + `darts-media` / `darts-ext` LVs |
+
+`estuary`, `shill`, `whale2` and `git` are NixOS systems with their own pages
+(see the [README](README.md#boxes)); [`mail`](mail.md) and [`darts`](darts.md) have host-side
+definitions here, but their guest operating systems are managed out of band.
+
+## Notable config files
+
+- [`nixos/boxes/colony/default.nix`](../../../nixos/boxes/colony/default.nix) — host hardware, networkd, firewall, backups.
+- [`nixos/boxes/colony/vms/default.nix`](../../../nixos/boxes/colony/vms/default.nix) — `my.vms.instances` for all six VMs.
+- [`nixos/modules/vms.nix`](../../../nixos/modules/vms.nix) — the `my.vms` module itself.

docs/sites/colony/darts.md

@@ -0,0 +1,37 @@
+# darts
+
+An opaque third-party/customer VM. Declared in `colony`'s `my.vms.instances`
+but **not a NixOS system**: this repo knows nothing about what runs inside it
+and doesn't manage it.
+
+- **Source (host-side only):** the `darts` instance in
+  [`nixos/boxes/colony/vms/default.nix`](../../../nixos/boxes/colony/vms/default.nix)
+  and the `90-vm-darts` network in
+  [`nixos/boxes/colony/default.nix`](../../../nixos/boxes/colony/default.nix)
+- **Host:** VM on `colony`
+- **nixpkgs:** not applicable (unmanaged guest; host-side definition uses `colony`'s `mine-stable`)
+
+## Role
+
+- Customer/dedicated VM, left alone beyond hosting and connectivity.
+- A thin-provisioned `root` LV on the NVMe pool, plus `darts-media` (RAID 5 across the four HDDs)
+  and `darts-ext` (linear storage on the 18 TB HDD) in the `main` VG. See
+  [`colony`'s storage layout](colony.md#storage).
+
+## Network assignments
+
+This guest is not a NixOS system, so its host-routed addresses are not rows in the generated
+[network assignments](../../networking.md#box-assignments) table.
+
+- Same customer-VM pattern as [`mail`](mail.md): dedicated unbridged TAP
+  (`vm-darts`), point-to-point address
+  (`custRouting.darts-vm`) on the host side, link-routed public /32
+  `94.142.242.255`, and the IPv6 /64 `2a0e:97c0:4d2:2001::/64` with RAs.
+- DNS: `darts-cust.ams1.int.nul.ie`. Like the other customer prefixes, its
+  inbound traffic is accepted by `estuary` without per-port filtering and
+  forwarded on by `colony`.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/default.nix`](../../../nixos/boxes/colony/vms/default.nix) — VM definition.
+- [`nixos/boxes/colony/default.nix`](../../../nixos/boxes/colony/default.nix) — host-side network and routing.

docs/sites/colony/estuary.md

@@ -0,0 +1,166 @@
+# estuary
+
+The colony edge router and firewall — the box that holds colony's public IPs
+and connects everything else at the site to the internet.
+
+- **Source:** [`nixos/boxes/colony/vms/estuary/`](../../../nixos/boxes/colony/vms/estuary)
+  (`default.nix`, `bgp.nix`, `dns.nix`, `bandwidth.nix`)
+- **Host:** VM on `colony` (gets the WAN NIC by PCI passthrough)
+- **nixpkgs:** `mine`
+
+## Role
+
+- **Edge routing / firewall / NAT** — owns the colony public IPv4/IPv6 assignments, NATs outbound
+  traffic, and port-forwards inbound services (see [Firewall and NAT](#firewall-and-nat)).
+- **DNS** — PowerDNS authoritative server *and* recursor (see [DNS](#dns)).
+- **BGP** — BIRD2 speaking AS211024 with upstreams, IXP route servers and
+  direct peers (see [BGP](#bgp)).
+- **VPNs** — the `as211024` L2 VXLAN mesh plus three point-to-point WireGuard
+  tunnels (see [VPNs](#vpns)).
+- **Misc** — `iperf3` server, netdata.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `estuary`).
+
+## WAN and IXP VLANs
+
+- `wan` — the passed-through `igb` NIC (9000 MTU, enlarged rings). It carries
+  the plain upstream uplink (static v4/v6 with gateways from the `internal`
+  assignment) plus the tagged `ifog` VLAN.
+- `ifog` (VLAN 409) is an iFog QinQ transport that carries the IXP VLANs as
+  nested tags:
+
+| Interface | VLAN | IPv4 | IPv6 | Purpose |
+|---|---|---|---|---|
+| `frys-ix` | 701 | `185.1.160.196/23` | `2001:7f8:10f::3:3850:196/64` | Frys-IX peering LAN |
+| `nl-ix` | 1845 | `193.239.116.145/22` | `2001:7f8:13::a521:1024:1/64` | NL-ix peering LAN |
+| `fogixp` | 1147 | `185.1.147.159/24` | `2001:7f8:ca:1::159/64` | FogIXP peering LAN |
+| `ifog-transit` | 702 | — | `2a0c:9a40:100f:370::2/64` | iFog IPv6 transit |
+
+The IXP interfaces run at 1500 MTU with DHCP/RA/LLDP off; an nftables `ixp`
+chain rejects non-IP/ARP ethertypes in both directions.
+
+- `base` — colony base network; sends RAs and serves DNS to the site, and
+  routes the `vms`/`ctrs`/`oci`, Tailscale, `qclk`, `vip*` and customer
+  prefixes back via `colony`.
+- `as211024` — the L2 mesh interface (see VPNs).
+
+## Firewall and NAT
+
+`my.firewall` (nftables). Inbound port forwards (`my.firewall.nat.forwardPorts`,
+driven by the shared `lib.my.c.colony.firewallForwards` list):
+
+| Service | Forwarded to |
+|---|---|
+| HTTP/S, Matrix federation | `middleman` |
+| Git | `git` |
+| Game servers | OCI servers on `whale2`, `gam` |
+| Tailscale | `waffletail` |
+| `qclk` WireGuard | `qclk` |
+
+Besides the forwards, `extraRules` defines:
+
+- `routing-tcp` / `routing-udp` chains — the inbound allow-list for new
+  connections from `wan`/`as211024`/IXPs towards internal services (SSH
+  anywhere, otherwise per-service v4/v6 rules mirroring `firewallForwards`).
+- `filter-routing` — applied to `wan`/`as211024`/IXPs → `base` forwards;
+  customer prefixes (`mail`/`darts` v4, `cust.v6`) are accepted wholesale, the
+  rest goes through the `routing-*` chains.
+- SNAT: everything from `prefixes.all.v4` leaving non-`as211024` interfaces is
+  NATed to the public IP; the WireGuard tunnel prefixes get their own SNAT
+  addresses.
+- DNS redirect: DNS traffic arriving at estuary's own public addresses is
+  redirected to port 5353 (the authoritative server) — see below.
+
+## DNS
+
+Both halves are PowerDNS ([`dns.nix`](../../../nixos/boxes/colony/vms/estuary/dns.nix)). The live
+forward and reverse records are listed in the generated [DNS reference](../../reference/dns.md).
+
+### Authoritative
+
+`my.pdns.auth`, listening on `0.0.0.0:5353` / `[::]:5353`. Primary for
+`ams1.int.nul.ie`, `100.10.in-addr.arpa` and the `2a0e:97c0:4d2::/48` reverse
+zone.
+
+- Zone contents are largely generated from `allAssignments`
+  (`lib.my.dns.fwdRecords` / `ptrRecords` / `ptr6Records`); `ALIAS` records
+  (with `expand-alias`) point the zone apex at estuary itself.
+- AXFR is allowed to HE.net's secondary and the trusted internal/site-egress sources used by the
+  generated DNS reference.
+- `_acme-challenge` is a LUA `TXT` record answered from a file (DNS-01 issuance).
+- Reached publicly via the NAT redirect of port 53 → 5353; the `base` side also
+  accepts DNS directly.
+
+### Recursor
+
+`my.pdns.recursor` (`pdns-recursor`), listening on localhost and the `base`
+addresses, serving `prefixes.all` and the Tailscale prefixes.
+
+- Authoritative zones are forwarded back to `127.0.0.1:5353` (with NOTIFY
+  support, so changes show up immediately).
+- A small Lua `preresolve` hook rewrites `nix-cache.nul.ie` →
+  `http.ams1.int.nul.ie` so cache traffic stays on-site.
+
+## BGP
+
+BIRD2 ([`bgp.nix`](../../../nixos/boxes/colony/vms/estuary/bgp.nix)) speaking **AS211024**:
+
+| Peer | ASN | Role | Where / notes |
+|---|---|---|---|
+| ColoClue | AS8283 | Upstream | `euNetworks` 2/3, v4+v6 |
+| iFog | AS34927 | Upstream | IPv6 transit |
+| Hurricane Electric | AS6939 | Upstream | IPv6 over Frys-IX |
+| Frys-IX | AS56393 | IXP route server | |
+| NL-ix | AS34307 | IXP route server | lower preference |
+| FogIXP | AS47498 | IXP route server | |
+| LUJE.net | AS212855 | Direct peer | ColoClue/Frys-IX/FogIXP + multihop labs |
+| jurrian | AS212635 | Direct peer | |
+| Meta | AS32934 | Direct peer | Frys-IX/NL-ix |
+| Cloudflare | AS13335 | Direct peer | Frys-IX |
+| Apple | AS714 | Direct peer | NL-ix |
+| HE | AS6939 | Direct peer | Frys-IX (v4) |
+| bgp.tools | AS212232 | Monitoring | multihop collector, `add paths` |
+
+Statics originate the site prefixes: the `vip*` ranges via `base`, the
+ams1/internal v6 prefixes via `base`/`as211024`, and the home /48 towards the
+home routers' `as211024` VIP.
+
+Currently disabled (commented out): efero transit over FogIXP ("not working so
+well lately") and the NL-ix Cloudflare sessions.
+
+## VPNs
+
+### `as211024` L2 mesh
+
+Member alongside `river`/`stream`/`britway` (`my.vpns.l2`, the `l2mesh` module).
+The mesh transport, crypto and addressing are shared fabric — see
+[The AS211024 L2 mesh](../../networking.md#the-as211024-l2-mesh) in networking.md.
+
+### WireGuard tunnels
+
+Point-to-point tunnels terminated here as networkd `wireguard` netdevs (private
+keys from agenix); each SNATs out its own interface address:
+
+| Tunnel | Port | Prefix | Notes |
+|---|---|---|---|
+| `kelder` | 51820 | — | to the remote `kelder` site; kelder's public `estuary` assignment is routed over the tunnel |
+| `hillcrest` | 51822 | `prefixes.hillcrest.v4` (`10.100.5.0/30`) | /32 pair, estuary `.1` ↔ remote `.2` |
+| `john-valorant` | 51823 | `prefixes.john-valorant.v4` (`10.100.5.4/30`) | /32 pair, estuary `.1` ↔ remote `.2` |
+
+## Bandwidth management
+
+[`bandwidth.nix`](../../../nixos/boxes/colony/vms/estuary/bandwidth.nix) implements a WAN shaper: a
+token-bucket filter on `wan` (outbound) and on an `ifb-wan` IFB device that ingress traffic is
+mirrored into (inbound), with
+[`bandwidth.py`](../../../nixos/boxes/colony/vms/estuary/bandwidth.py) as a `bandwidth-limiter`
+service that watches utilisation and can adjust the configured rate. **Currently disabled** — the
+file is not in estuary's `imports` (only `dns.nix` and `bgp.nix` are), so no shaping is applied.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/estuary/default.nix`](../../../nixos/boxes/colony/vms/estuary/default.nix) — system, networkd, firewall, WireGuard, mesh membership.
+- [`nixos/boxes/colony/vms/estuary/bgp.nix`](../../../nixos/boxes/colony/vms/estuary/bgp.nix) — BIRD2 config.
+- [`nixos/boxes/colony/vms/estuary/dns.nix`](../../../nixos/boxes/colony/vms/estuary/dns.nix) — PowerDNS auth + recursor.
+- [`nixos/boxes/colony/vms/estuary/bandwidth.nix`](../../../nixos/boxes/colony/vms/estuary/bandwidth.nix) — WAN shaper (disabled, not imported).

docs/sites/colony/git.md

@@ -0,0 +1,61 @@
+# git
+
+The Gitea VM — source hosting and CI for the boxes (`git.nul.ie`).
+
+- **Source:** [`nixos/boxes/colony/vms/git/`](../../../nixos/boxes/colony/vms/git)
+  (`default.nix`, `gitea.nix`, `gitea-actions.nix`)
+- **Host:** VM on `colony`
+- **nixpkgs:** `mine`
+
+## Role
+
+### Gitea
+
+The Git forge at `git.nul.ie` (self-registration disabled), configured in
+[`gitea.nix`](../../../nixos/boxes/colony/vms/git/gitea.nix).
+
+- Backed by PostgreSQL on [`colony-psql`](shill/containers/colony-psql.md) (waited on via
+  `lib.my.systemdAwaitPostgres`).
+- LFS enabled; all object storage (incl. LFS and packages) is on MinIO at `s3.nul.ie` (bucket
+  `gitea`, on [`object`](shill/containers/object.md)) — the secret is spliced into `app.ini` at
+  startup.
+- Mail goes out via `mail.nul.ie`, including the issue-reply incoming-mail poller.
+
+### Gitea Actions runner
+
+One Docker-mode instance (`main-docker`) on podman (privileged, `podman` network), configured in
+[`gitea-actions.nix`](../../../nixos/boxes/colony/vms/git/gitea-actions.nix).
+
+- Labels for `node:24-trixie` and the self-built `git.nul.ie/dev/actions-ubuntu:26.04` images.
+- Runs as a fixed `gitea-runner` user (not `DynamicUser`) so it can read its token; jobs have a
+  configured timeout.
+- The action cache lives on a dedicated disk (`/var/cache/gitea-runner`).
+- Executes the repo's own `.gitea/workflows/ci.yaml`.
+
+### nginx
+
+Terminates TLS for `git.nul.ie` (and a default vhost) and proxies to Gitea on `:3000`. ACME
+(Let's Encrypt, production) issues `nul.ie` + `*.nul.ie` via the Cloudflare DNS-01 challenge.
+
+### podman
+
+Local container backend for the runner; `/var/lib/containers` is an XFS data disk, and the default
+`10.88.0.0/16` podman subnet is allowed to forward.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `git`).
+
+## Storage
+
+- `/var/lib/gitea` — the `git` LV (repositories, config).
+- `/var/cache/gitea-runner` — the `gitea-actions-cache` LV.
+- `/var/lib/containers` — the `oci` LV (XFS with project quotas). Despite the
+  name this is local to the `git` VM and unrelated to `whale2`'s `oci`
+  network.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/git/default.nix`](../../../nixos/boxes/colony/vms/git/default.nix) — VM config, nginx + ACME, podman, firewall.
+- [`nixos/boxes/colony/vms/git/gitea.nix`](../../../nixos/boxes/colony/vms/git/gitea.nix) — Gitea itself.
+- [`nixos/boxes/colony/vms/git/gitea-actions.nix`](../../../nixos/boxes/colony/vms/git/gitea-actions.nix) — the Actions runner.

docs/sites/colony/mail.md

@@ -0,0 +1,45 @@
+# mail
+
+A Debian VM running [mailcow](https://mailcow.email/) (`mail.nul.ie`) — the
+mail server for `nul.ie`. Declared in `colony`'s `my.vms.instances` but **not
+a NixOS system**: everything inside the VM is configured out of band.
+
+- **Source (host-side only):** the `mail` instance in
+  [`nixos/boxes/colony/vms/default.nix`](../../../nixos/boxes/colony/vms/default.nix)
+  and the `90-vm-mail` network in
+  [`nixos/boxes/colony/default.nix`](../../../nixos/boxes/colony/default.nix)
+- **Host:** VM on `colony`
+- **nixpkgs:** not applicable (Debian guest; host-side definition uses `colony`'s `mine-stable`)
+
+## Role
+
+- Runs the full mailcow stack (Postfix/Dovecot/SOGo/Rspamd) for `nul.ie`.
+  Other colony services send through it as `mail.nul.ie` (e.g. Gitea, and the
+  disabled Mastodon config).
+- `root` and `data` LVM disks; the `vm-mail-data` LV is included in `colony`'s `borgthin` backups.
+
+## Network assignments
+
+This guest is not a NixOS system, so its host-routed addresses are not rows in the generated
+[network assignments](../../networking.md#box-assignments) table.
+
+### Link and addressing
+
+The VM attaches to a dedicated, unbridged TAP (`vm-mail`). `colony` puts the point-to-point
+`custRouting.mail-vm` address on the host side, link-routes public
+`94.142.241.227/32` down the TAP, and advertises `2a0e:97c0:4d2:2000::/64` with RAs.
+
+- DNS: `mail-vm.ams1.int.nul.ie` (and `mail.nul.ie` publicly, incl. the PTR in
+  estuary's reverse zone). `estuary` accepts traffic to the customer prefixes
+  without per-port filtering; `colony` forwards it on ("trust for now").
+
+## Notes
+
+- ACME certificates are issued on `middleman` and pushed to the VM over SSH
+  (`acme@mail.nul.ie mailcow-ssl-reload`, key `middleman/mailcow-ssh.key`);
+  the VM's SSH host key is pinned at `.keys/mail-vm-host.pub`.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/default.nix`](../../../nixos/boxes/colony/vms/default.nix) — VM definition.
+- [`nixos/boxes/colony/default.nix`](../../../nixos/boxes/colony/default.nix) — host-side network and routing.

docs/sites/colony/shill/README.md

@@ -0,0 +1,84 @@
+# shill
+
+The colony NixOS container host — most colony applications run as
+`systemd-nspawn` containers on this VM.
+
+- **Source:** [`nixos/boxes/colony/vms/shill/`](../../../../nixos/boxes/colony/vms/shill)
+  (`default.nix`, `containers-ext.nix`, `containers/`)
+- **Host:** VM on `colony`
+- **nixpkgs:** `mine`
+
+## Role
+
+### Container hosting
+
+`my.containers.instances` runs the colony containers on the `ctrs` bridge. Each is a full NixOS
+system rendered through `my.asContainer` and deployed as a profile on `shill`; containers are not
+standalone deploy targets. The shared container module supplies the nspawn units, `/persist` and
+store binds.
+
+### Shared storage
+
+LVM-backed host volumes are bind-mounted into the consumers: `/mnt/media` is read-only in
+`middleman` and read-write in `jackflix`; `/mnt/minio` and `/mnt/nix-cache` are read-write in
+`object`.
+
+### Routing
+
+`shill` routes between `vms` and `ctrs`, advertises `estuary` as DNS on `ctrs`, and routes Tailscale
+through `waffletail` and the `qclk` prefix through `qclk`. It applies the shared `firewallForwards`
+DNAT for `estuary`'s public IP; a connection-mark-based SNAT rule keeps replies symmetric.
+
+### Host tuning
+
+The box has a larger conntrack table and ephemeral-port range for high connection counts. Netdata
+listens on port 19999.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../networking.md#box-assignments) table (this box: `shill`).
+
+## Containers
+
+Defined under
+[`shill/containers/`](../../../../nixos/boxes/colony/vms/shill/containers) and
+wired up in `shill`'s `my.containers.instances`. The generated
+[network assignments](../../../networking.md#box-assignments) table is the source of truth for
+their current addresses. Each container has its own page:
+
+| Container | Role |
+|---|---|
+| [`middleman`](containers/middleman.md) | Reverse proxy, ACME, nginx-sso, librespeed |
+| [`vaultwarden`](containers/vaultwarden.md) | Password manager |
+| [`colony-psql`](containers/colony-psql.md) | Shared PostgreSQL (14) |
+| [`chatterbox`](containers/chatterbox.md) | Matrix Synapse + bridges |
+| [`jackflix`](containers/jackflix.md) | Media stack |
+| [`object`](containers/object.md) | MinIO, Harmonia Nix cache, Sharry, HedgeDoc, wastebin |
+| [`toot`](containers/toot.md) | Bluesky PDS (Mastodon disabled) |
+| [`waffletail`](containers/waffletail.md) | Tailscale subnet router / exit node |
+| [`qclk`](containers/qclk.md) | WireGuard management appliance |
+| [`gam`](containers/gam.md) | Terraria server |
+
+### `jam`
+
+A one-off: [`containers-ext.nix`](../../../../nixos/boxes/colony/vms/shill/containers-ext.nix)
+runs a raw `systemd-nspawn` container (not a `my.containers` instance, not
+NixOS) with its root on the `jam` LV, private user namespaces and a `ve-jam`
+veth. It gets the `jam` customer prefix (`prefixes.jam`, `jam-cust` in DNS)
+and SSH is forwarded to it from `shill`'s public IP port 60022.
+
+## Notes
+
+- `nix.settings.substituters` is forced to just `https://cache.nixos.org` —
+  `shill` sits next to the S3 cache on `object`, so it doesn't use it.
+- [`hercules.nix`](../../../../nixos/boxes/colony/vms/shill/hercules.nix)
+  (Hercules CI agent + the `nix-cache-gc` timer for the S3 binary cache)
+  exists but is **currently disabled**: the file is not imported by
+  `shill/default.nix`.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/default.nix`](../../../../nixos/boxes/colony/vms/shill/default.nix) — VM config, networkd, firewall, `my.containers.instances`.
+- [`nixos/boxes/colony/vms/shill/containers/default.nix`](../../../../nixos/boxes/colony/vms/shill/containers/default.nix) — container imports.
+- [`nixos/boxes/colony/vms/shill/containers-ext.nix`](../../../../nixos/boxes/colony/vms/shill/containers-ext.nix) — the `jam` nspawn container.
+- [`nixos/modules/containers.nix`](../../../../nixos/modules/containers.nix) — the `my.containers` module.

docs/sites/colony/shill/containers/chatterbox.md

@@ -0,0 +1,41 @@
+# chatterbox
+
+The Matrix homeserver for `nul.ie` (Synapse) and its bridges to other chat networks.
+[middleman](middleman.md) fronts it as `matrix.nul.ie` for clients and on `:8448` for
+federation.
+
+- **Source:** [`shill/containers/chatterbox.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/chatterbox.nix)
+- **Host:** NixOS container on [`shill`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+### Synapse
+
+`matrix-synapse` serves `nul.ie` at `https://matrix.nul.ie`, with Element at `element.nul.ie`.
+Port 8008 carries client and federation traffic with forwarded headers, while a localhost manhole
+uses port 9000. Registration and guest access are disabled; uploads, dynamic thumbnails and URL
+previews are enabled, with preview fetching restricted to [middleman](middleman.md).
+
+### Bridges
+
+The box runs heisenbridge for IRC, `mautrix-whatsapp`, and two `mautrix-meta` instances for
+Messenger and Instagram. The mautrix bridges use [colony-psql](colony-psql.md), default to
+end-to-end encryption, and share the secret `doublepuppet.yaml` registration for double puppeting
+onto `nul.ie`. The firewall admits ports 8008 and 8009 in addition to netdata.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `chatterbox`).
+
+## Notes
+
+- Synapse's real database config lives in the `chatterbox/synapse.yaml` age secret — options
+  only merge at the top level, so the base config carries a dummy `sqlite3` block to satisfy
+  the module defaults. The signing key is also an age secret.
+- `olm-3.2.16` is allowed via `permittedInsecurePackages` (a nixpkgs E2EE library issue).
+- The bridge services get `ffmpeg` on their `PATH` for GIF→video conversion.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/chatterbox.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/chatterbox.nix) — container definition, Synapse settings and all bridge configuration

docs/sites/colony/shill/containers/colony-psql.md

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+# colony-psql
+
+The shared PostgreSQL instance for colony services. Rather than each service running its own
+database, the containers (and the `git` VM) connect here over the `ctrs` network.
+
+- **Source:** [`shill/containers/colony-psql.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/colony-psql.nix)
+- **Host:** NixOS container on [`shill`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+- **PostgreSQL 14** with TCP/IP enabled, reachable from the whole colony address space using `md5`
+  authentication. The firewall allows `5432`.
+- Local `peer` auth maps `postgres`, `root`, `netdata` and `dev` to the `postgres` superuser via
+  the ident map.
+- **netdata** with the Python PostgreSQL collector.
+- Consumers wait for the database to accept connections with the `lib.my.systemdAwaitPostgres`
+  helper (e.g. `sharry`, `atticd`, `mastodon-init-db`, and `middleman`'s nginx as a DNS
+  bootstrap hack).
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `colony-psql`).
+
+The assignment also has the alt name `colony-psql` (no `-ctr` suffix), which is what consumers
+use as the database hostname.
+
+## Consumers
+
+- [object](object.md) — `sharry` and `hedgedoc` (and `atticd` when enabled) over
+  `colony-psql:5432`
+- [toot](toot.md) — Mastodon's database (Mastodon currently disabled)
+- [chatterbox](chatterbox.md) — the mautrix bridges (WhatsApp, Messenger, Instagram) via
+  Postgres URIs in their secret env files
+- `git` VM — Gitea
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/colony-psql.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/colony-psql.nix) — container definition and PostgreSQL configuration

docs/sites/colony/shill/containers/gam.md

@@ -0,0 +1,29 @@
+# gam
+
+A game-server container currently dedicated to Terraria.
+
+- **Source:** [`shill/containers/gam.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/gam.nix)
+- **Host:** NixOS container on [`shill`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+Runs lightweight game servers directly as NixOS services, rather than as OCI containers on
+[`whale2`](../../whale2.md).
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `gam`).
+
+## Terraria server
+
+`services.terraria` runs the dedicated server with its world at
+`/var/lib/terraria/NotWorld.wld`. It creates large worlds automatically, uses the MOTD
+"sup gamers", and disables UPnP. Additional settings such as the password come from the
+`gam/terraria.conf` age secret used as the service configuration file.
+
+`openFirewall` is enabled, and `estuary` forwards TCP and UDP port `7777` to the container.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/gam.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/gam.nix) — container definition and the Terraria service

docs/sites/colony/shill/containers/jackflix.md

@@ -0,0 +1,56 @@
+# jackflix
+
+The media stack — acquisition, library, streaming and photos. Torrent traffic is routed through
+an AirVPN WireGuard tunnel so downloads only flow while the VPN is up.
+
+- **Source:** [`shill/containers/jackflix/`](../../../../../nixos/boxes/colony/vms/shill/containers/jackflix)
+  (`default.nix`, `networking.nix`)
+- **Host:** NixOS container on [`shill`](../README.md) (bind-mounts `/mnt/media` read-write)
+- **nixpkgs:** `mine`
+
+## Role
+
+| Service | Port | Purpose |
+| --- | --- | --- |
+| Jellyfin | `8096` | streaming, published as `jackflix.nul.ie` |
+| Transmission | `9091` | BitTorrent client (`transmission_4`), published as `torrents.nul.ie` (SSO) |
+| Jackett | `9117` | indexer aggregator, `jackett.nul.ie` (SSO) |
+| FlareSolverr | — | Cloudflare challenge solver for Jackett |
+| Radarr | `7878` | movies, `radarr.nul.ie` (SSO) |
+| Sonarr | `8989` | TV, `sonarr.nul.ie` (SSO) |
+| Jellyseerr (`seerr`) | `5055` | request portal, `gib.nul.ie` (`openFirewall` on) |
+| PhotoPrism | `2342` | photos, `photos.nul.ie`; password auth, sqlite DB, originals/import under `/mnt/media/photoprism` |
+| copyparty | `3923` | file sharing, `stuff.nul.ie`; serves `/mnt/media/public` (read-only to everyone) and `/priv` → `/mnt/media/stuff` (admin for `dev`), share creation, indexing (`e2dsa`/`e2t`), file-magic checks |
+
+All published through [middleman](middleman.md) as shown. A shared `media` group plus a group-writable
+umask on Radarr/Sonarr gives the apps coordinated access to the media volume.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `jackflix`).
+
+## VPN download path
+
+[`networking.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/jackflix/networking.nix)
+defines a `vpn` WireGuard netdev to **AirVPN NL** using a key and PSK from age secrets:
+
+- Policy routing keeps colony traffic on the main table while everything else falls through to the
+  VPN's dedicated table, so the services stay reachable on the `ctrs` network while outbound
+  torrent traffic exits via AirVPN. `DNSDefaultRoute` is disabled on `host0`; the VPN provides DNS.
+- `transmission` and `jackett` `bindsTo` `systemd-networkd-wait-online@vpn.service` — they only
+  run while the tunnel is up.
+- AirVPN forwards a peer port to Transmission (`peer-port`); the firewall accepts it and drops
+  other new inbound TCP from `vpn`, while non-VPN input is limited to the service ports
+  (netdata, Transmission, Jackett, Radarr, Sonarr, Jellyfin, PhotoPrism) plus copyparty's `3923`
+  from the base config and Jellyseerr's `5055`.
+
+## Storage
+
+Media lives on the shared `/mnt/media` volume (bind-mounted read-write from `shill`); Transmission
+downloads into `/mnt/media/downloads/torrents` with a `.incomplete` directory and configured
+bandwidth and seed-ratio limits.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/jackflix/default.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/jackflix/default.nix) — container definition and the media services
+- [`nixos/boxes/colony/vms/shill/containers/jackflix/networking.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/jackflix/networking.nix) — AirVPN WireGuard netdev, policy routing and VPN firewall rules

docs/sites/colony/shill/containers/middleman.md

@@ -0,0 +1,96 @@
+# middleman
+
+The front-end reverse proxy for the colony's public web services — the single ingress that
+`estuary` DNATs HTTP/HTTPS (and Matrix federation on `:8448`) to. Terminates TLS with wildcard
+certificates it issues itself, provides nginx-sso for gated vhosts, and runs a librespeed
+backend.
+
+- **Source:** [`shill/containers/middleman/`](../../../../../nixos/boxes/colony/vms/shill/containers/middleman)
+  (`default.nix`, `vhosts.nix`)
+- **Host:** NixOS container on [`shill`](../README.md) (`my.containers` ephemeral nspawn on the
+  `ctrs` bridge; bind-mounts `/mnt/media` read-only for the static file vhosts)
+- **nixpkgs:** `mine`
+
+## Role
+
+### nginx
+
+The reverse proxy enables `vts`, `fancyindex`, Brotli, kTLS and a proxy cache. Its dynamic resolver
+points at `estuary`, allowing upstreams named under `ams1.int.nul.ie` to resolve again at runtime.
+All vhosts live in
+[`vhosts.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/middleman/vhosts.nix). nginx
+also waits for `colony-psql` through `systemdAwaitPostgres`, avoiding an early-boot DNS stall.
+
+### ACME
+
+`middleman` issues certificates for its own vhosts; it is not a shared CA for other boxes.
+
+- `ams1.int.nul.ie` and its wildcard use a lego `exec` challenge that SSHes to
+  `pdns-file-records@estuary-vm`. This is the default `useACMEHost` certificate internally.
+- `nul.ie`, `*.nul.ie` and `*.s3.nul.ie` use Cloudflare DNS. A `postRun` hook copies renewed
+  material to the `mail` VM and runs `mailcow-ssl-reload` there.
+- Renewal reloads nginx; the `acme` group owns the secret files and includes the nginx user.
+
+### nginx-sso
+
+The `generic` SSO instance at `sso.nul.ie` uses Google OAuth by default and also offers a simple
+username/password provider. Its cookie domain is `.nul.ie`; gated vhosts include the generated
+`server-generic.conf` / `location-generic.conf` snippets from `/etc/nginx/includes/sso/`.
+
+### librespeed
+
+The frontend and backend are published as `speed.nul.ie` and `librespeed.ams1.int.nul.ie`, both
+proxied to `localhost:8989`.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `middleman`).
+
+The firewall allows `http`, `https` and `8448` (Matrix federation). A small nftables SNAT rule
+rewrites outbound IPv6 to the container's own address on `host0`.
+
+## Published vhosts
+
+Everything is under `*.nul.ie` with the public wildcard cert unless noted; defaults applied to
+all vhosts are `onlySSL`, kTLS and HTTP/2. "SSO" = gated behind nginx-sso (`generic` instance).
+
+| Host | Upstream | Notes |
+| --- | --- | --- |
+| `nul.ie` (`_`, default) | static | landing page (`index.html`, CV PDF, SSH pubkey); serves Matrix `.well-known`s and redirects `webfinger`/`nodeinfo`/`host-meta` → `toot.nul.ie`, `atproto-did` → `pds.nul.ie`; `forceSSL` (plain HTTP redirects to HTTPS) |
+| `localhost` | — | loopback-only VTS status page at `/status` (scraped by netdata); plain HTTP |
+| `sso.nul.ie` | `localhost:8082` | nginx-sso endpoint |
+| `netdata-colony.nul.ie` | `<host>.ams1.int.nul.ie:19999` | netdata fan-out over `vm`, `fw`, `ctr`, `oci`, `http`, `jackflix-ctr`, `chatterbox-ctr`, `colony-psql-ctr`; **SSO** |
+| `pass.nul.ie` | `vaultwarden-ctr:8080` | [vaultwarden](vaultwarden.md); `/notifications/hub` proxied with websockets |
+| `matrix.nul.ie` | `chatterbox-ctr:8008` | [chatterbox](chatterbox.md) Synapse client + federation; also listens on `:8448` as federation `default_server`; `= /` redirects to Element; serves Matrix `.well-known`s |
+| `element.nul.ie` | static `element-web` | Element configured for the `nul.ie` homeserver |
+| `torrents.nul.ie` | `jackflix-ctr:9091` | Transmission ([jackflix](jackflix.md)); **SSO** |
+| `jackett.nul.ie` | `jackflix-ctr:9117` | **SSO** |
+| `radarr.nul.ie` | `jackflix-ctr:7878` | **SSO**; websockets |
+| `sonarr.nul.ie` | `jackflix-ctr:8989` | **SSO**; websockets |
+| `gib.nul.ie` | `jackflix-ctr:5055` | Jellyseerr requests |
+| `jackflix.nul.ie` | `jackflix-ctr:8096` | Jellyfin; `/socket` websockets; `/` redirects to `/web/` |
+| `toot.nul.ie` | `toot-ctr:80` | Mastodon — **upstream currently disabled**, see [toot](toot.md) |
+| `pds.nul.ie` | `toot-ctr:3000` | Bluesky PDS ([toot](toot.md)); websockets |
+| `share.nul.ie` | `object-ctr:9090` | Sharry ([object](object.md)); websockets |
+| `stuff.nul.ie` | `jackflix-ctr:3923` | copyparty |
+| `public.nul.ie` (+ alias `p.nul.ie`) | static `/mnt/media/public` | fancyindex file listing; `addSSL` so plain HTTP also works |
+| `mc-map.nul.ie` | `simpcraft-oci:8100` | Minecraft map (OCI container on [`whale2`](../../whale2.md#game-servers)) |
+| `mc-rail.nul.ie` | `simpcraft-oci:3876` | Minecraft railway map ([`whale2`](../../whale2.md#game-servers)) |
+| `mc-map-kink.nul.ie` | `kinkcraft-oci:8100` | Minecraft map ([`whale2`](../../whale2.md#game-servers)) |
+| `speed.nul.ie` | `localhost:8989` | librespeed |
+| `librespeed.ams1.int.nul.ie` | `localhost:8989` | librespeed on the internal domain (internal wildcard cert) |
+| `md.nul.ie` | `object-ctr:3000` | HedgeDoc; websockets |
+| `pb.nul.ie` | `object-ctr:8088` | wastebin |
+| `photos.nul.ie` | `jackflix-ctr:2342` | PhotoPrism; websockets |
+| `pront.nul.ie` | `stream-hi.h.nul.ie:5000` | OctoPrint on the home network ([`stream`](../../../home/stream.md)); `/webcam/` → `:5050`; **SSO** |
+| `hass.nul.ie` | `hass-ctr.h.nul.ie:8123` | [Home Assistant](../../../home/sfh/containers/hass.md) (home network); websockets |
+| `hass-john.nul.ie` | `john-valorant-tun.ams1.int.nul.ie:8123` | remote Home Assistant over the point-to-point tunnel; websockets |
+| `minio.nul.ie` | `object-ctr:9001` | MinIO console; `/ws` websockets |
+| `s3.nul.ie` (+ `*.s3.nul.ie`) | `object-ctr:9000` | MinIO S3 API (virtual-host style via the `*.s3` wildcard cert); `/gitea/packages/` has a hack forcing the correct `Content-Type` for Docker image manifests |
+| `nix-cache.nul.ie` | `object-ctr:5000` | Harmonia Nix binary cache; `.narinfo`/`nar/`/`serve/` paths get immutable `Cache-Control`/`Expires` headers |
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/middleman/default.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/middleman/default.nix) — container definition: nginx, ACME, nginx-sso, librespeed, secrets
+- [`nixos/boxes/colony/vms/shill/containers/middleman/vhosts.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/middleman/vhosts.nix) — all virtual hosts, the SSO include helpers, and the `.well-known` tree
+- [`nixos/boxes/colony/vms/shill/containers/middleman/default.html`](../../../../../nixos/boxes/colony/vms/shill/containers/middleman/default.html) — default vhost landing page

docs/sites/colony/shill/containers/object.md

@@ -0,0 +1,39 @@
+# object
+
+Object storage and the Nix binary cache, plus a few small self-hosted web apps (Sharry,
+HedgeDoc, wastebin).
+
+- **Source:** [`shill/containers/object.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/object.nix)
+- **Host:** NixOS container on [`shill`](../README.md) (bind-mounts `/mnt/minio` and
+  `/mnt/nix-cache` read-write)
+- **nixpkgs:** `mine`
+
+## Role
+
+| Service | Port | Purpose |
+| --- | --- | --- |
+| MinIO | `9000` (S3) / `9001` (console) | S3-compatible object storage, `s3.nul.ie` + `*.s3.nul.ie` (virtual-host style via `MINIO_DOMAIN`), console at `minio.nul.ie`; region `eu-central-1`; data on the `/mnt/minio` XFS volume |
+| Harmonia | `5000` | Nix binary cache at `nix-cache.nul.ie` — `harmonia-dev` cache serves `shill`'s `/nix/store` out of a dedicated store view rooted at `/var/lib/harmonia` (bind-mounted from `/mnt/nix-cache`), signed with the `nix-cache.key` secret; a `harmonia` user with authorized keys exists for cache pushes |
+| Sharry | `9090` | file sharing at `share.nul.ie`; Postgres on [colony-psql](colony-psql.md), files stored in the `share` MinIO bucket; fixed `dev` account + invite signup; mail via `mail.nul.ie`; configured share-size limit |
+| HedgeDoc | `3000` | collaborative markdown notes at `md.nul.ie`; Postgres on [colony-psql](colony-psql.md); anonymous edits but no anonymous notes, email login, no open email registration |
+| wastebin | `8088` | pastebin at `pb.nul.ie` |
+| atticd | `8069` | **currently disabled** (`services.atticd.enable = false`) — an alternative Nix cache that would store locally and sit behind `nix-cache.nul.ie`; config (including the `object/atticd.env` secret) is kept around |
+
+Everything public is fronted by [middleman](middleman.md) (see its vhost table). The
+`minio-client` is installed and the user's `~/.mc/config.json` points at an age-secret config.
+`minio-2025-10-15T17-29-55Z` is allowlisted via `permittedInsecurePackages` (flagged as a TODO).
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `object`).
+
+## Backing services
+
+- [colony-psql](colony-psql.md) — Sharry and HedgeDoc databases (atticd too, when enabled).
+- MinIO buckets back other boxes' services: Gitea LFS/packages (with the `middleman` MIME hack
+  for Docker manifests), Mastodon's `mastodon` bucket and the Bluesky PDS `pds` bucket on
+  [toot](toot.md), and Sharry's `share` bucket.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/object.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/object.nix) — container definition and all services

docs/sites/colony/shill/containers/qclk.md

@@ -0,0 +1,34 @@
+# qclk
+
+A WireGuard management appliance for the `qclk` network — it terminates the `management`
+tunnel and routes/NATs the `qclk` prefix. No service daemon is currently defined in the config;
+the container provides the network plumbing and opens the API port.
+
+- **Source:** [`shill/containers/qclk/`](../../../../../nixos/boxes/colony/vms/shill/containers/qclk)
+  (`default.nix`)
+- **Host:** NixOS container on [`shill`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+- **WireGuard `management` interface** — listens on UDP `51821` (`lib.my.c.colony.qclk.wgPort`,
+  allowed through the firewall; `estuary` port-forwards it here) with the private key from the
+  `qclk/wg.key` age secret. Managed devices are static peers, each pinned to its own address in the
+  `qclk` prefix; the peer list currently has a single entry.
+- **Routing/NAT** — `shill` routes the `qclk` prefix to this container, and outbound traffic from
+  `host0` into `management` is
+  SNATed to the container's `qclk` address. Forwarding into `management` is accepted from the
+  AS211024 trusted IPv4 ranges (`lib.my.c.as211024.trusted.v4`).
+- **API port** — TCP `8080` is accepted on the `management` interface (`apiPort`), but note
+  `services = { }`: whatever serves the qclk API is not defined in this configuration today.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `qclk`).
+
+Two assignments: `internal` on the `ctrs` network like the other containers, and `qclk` on the
+`management` WireGuard interface (IPv4 only, no DNS name).
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/qclk/default.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/qclk/default.nix) — container definition: WireGuard netdev, peer list and firewall rules

docs/sites/colony/shill/containers/toot.md

@@ -0,0 +1,47 @@
+# toot
+
+Federated-social container. Despite the name, the only service actually running is a **Bluesky
+PDS** — the Mastodon instance ("toots") is **currently disabled**.
+
+- **Source:** [`shill/containers/toot.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/toot.nix)
+- **Host:** NixOS container on [`shill`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+### Bluesky PDS
+
+The active service listens on port 3000 as `pds.nul.ie`, fronted by [middleman](middleman.md),
+which also redirects `/.well-known/atproto-did` here. It requires invites, applies an upload-size
+limit, and stores blobs in [object](object.md)'s `pds` MinIO bucket. Federation uses the standard
+Bluesky services and crawlers. `toot/pds.env` supplies secrets, including S3 credentials, and mail
+comes from `pds@nul.ie`.
+
+### Mastodon
+
+Mastodon is disabled with `services.mastodon.enable = false`, but its configuration remains:
+
+- `nul.ie` is the local domain and `toot.nul.ie` the web domain.
+- PostgreSQL runs on [colony-psql](colony-psql.md), with local Redis and SMTP through `mail.nul.ie`.
+- Media uses the `mastodon` MinIO bucket, a configured streaming-process pool, and periodic cleanup.
+- [middleman](middleman.md) still proxies the dead vhost and `.well-known` endpoints.
+
+The removed `otpSecretFile` option must be addressed before the service can return.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `toot`).
+
+The firewall allows `http` (the Mastodon nginx vhost) and the PDS port `3000` besides netdata.
+
+## Notes
+
+- The local nginx still carries the Mastodon virtual host (`toot.nul.ie`) with proxy-header
+  overrides for being behind `middleman` — part of the preserved-but-disabled Mastodon setup.
+- `mastodon-init-dirs` appends the S3 secret key to Mastodon's `.secrets_env` (the module has no
+  option for a secret-key file), and `mastodon-init-db` waits for `colony-psql` — moot while
+  Mastodon is disabled.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/toot.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/toot.nix) — container definition; active PDS config and the preserved (disabled) Mastodon config

docs/sites/colony/shill/containers/vaultwarden.md

@@ -0,0 +1,33 @@
+# vaultwarden
+
+[Vaultwarden](https://github.com/dani-garcia/vaultwarden), a Bitwarden-compatible password
+manager, published as `pass.nul.ie` through [middleman](middleman.md).
+
+- **Source:** [`shill/containers/vaultwarden.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/vaultwarden.nix)
+- **Host:** NixOS container on [`shill`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+- **vaultwarden** — HTTP on `[::]:8080`, WebSocket notifications on `3012` (both allowed through
+  the firewall). Web vault enabled, signups disabled, Bitwarden push notifications enabled
+  (`PUSH_ENABLED`). `DOMAIN` is `https://pass.nul.ie`.
+- **SMTP** via `mail.nul.ie:587` (STARTTLS) as `pass@nul.ie`; credentials and other sensitive
+  settings come from the `vaultwarden/config.env` age secret.
+- **Backups** — a `borgbackup` job pushes `/var/lib/vaultwarden` to rsync.net
+  using a repokey-encrypted repository; its passphrase and SSH key come from secrets, and the job
+  keeps daily, weekly and monthly archives according to its configured retention policy.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `vaultwarden`).
+
+## Persistence
+
+`/var/lib/vaultwarden` is persisted through `my.tmproot.persistence` — like the other
+`shill` containers the root is ephemeral and real state lives under `/persist` (bind-mounted
+from the host's `/persist/containers/vaultwarden`).
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/vaultwarden.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/vaultwarden.nix) — container definition, service config and the borgbackup job

docs/sites/colony/shill/containers/waffletail.md

@@ -0,0 +1,34 @@
+# waffletail
+
+The colony Tailscale node: a subnet router and exit node that advertises the colony prefixes
+into the tailnet.
+
+- **Source:** [`shill/containers/waffletail.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/waffletail.nix)
+- **Host:** NixOS container on [`shill`](../README.md)
+- **nixpkgs:** `mine`
+
+## Role
+
+### Tailscale
+
+The node authenticates to `hs.nul.ie` with the secret `tailscale-auth.key`. It disables Tailscale's
+netfilter management, advertises itself as an exit node and advertises the colony IPv4/IPv6 ranges,
+but does not accept routes. UDP port 41641 is open and forwarded here by `estuary`.
+
+### Routing and firewall
+
+`shill` routes the Tailscale prefixes to this container.
+The repository's nftables rules trust `tailscale0`, permit colony-sourced forwarding into the
+tailnet, and SNAT tailnet traffic leaving through `host0` unless its destination is already within
+colony.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `waffletail`).
+
+Two assignments: `internal` on the `ctrs` network like the other containers, and `tailscale` for
+its addresses on the tailnet itself (no DNS name).
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/shill/containers/waffletail.nix`](../../../../../nixos/boxes/colony/vms/shill/containers/waffletail.nix) — container definition, Tailscale setup and forward/NAT rules

docs/sites/colony/whale2.md

@@ -0,0 +1,80 @@
+# whale2
+
+The colony podman/OCI host, dedicated to game servers (kept off `shill` so
+container churn and resource use stay isolated).
+
+- **Source:** [`nixos/boxes/colony/vms/whale2/`](../../../nixos/boxes/colony/vms/whale2)
+  (`default.nix`, `valheim.nix`, `minecraft/`, `enshrouded.nix`)
+- **Host:** VM on `colony`
+- **nixpkgs:** `mine`
+
+## Role
+
+### Container runtime
+
+OCI containers run under podman (`virtualisation.oci-containers`) with the netavark backend and
+`firewall_driver = "none"`, leaving firewall management to `my.firewall`.
+
+### Routable game servers
+
+Each server gets an address from `extraAssignments` (`valheim-oci`, `simpcraft-oci`, …) on the
+`colony` netavark network. That network is backed by the `oci` interface and `prefixes.oci` v4/v6
+ranges; `lib.my.dockerNetAssignment` supplies the address through `--network=colony:ip=…`.
+`estuary` forwards the public game ports, while IPv6 reaches the containers directly.
+
+### Storage
+
+`/var/lib/containers` is a dedicated XFS disk with project quotas.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `whale2`).
+
+## Game servers
+
+The OCI containers are documented here (they have no pages of their own).
+Their per-container `extraAssignments` on the `oci` network are listed in the generated
+[network assignments](../../networking.md#box-assignments) table. Ports below are the public ones
+forwarded by `estuary`.
+
+| Container | Ports | Status |
+|---|---|---|
+| `valheim` | `2456-2457`/udp | running |
+| `simpcraft` | `25565` tcp+udp | running |
+| `simpcraft-staging` | `25566` tcp | **disabled** (commented out) |
+| `enshrouded` | `15636-15637`/udp | **disabled** (`enshrouded.nix` not imported) |
+| `kevcraft` | `25567` tcp+udp | running |
+| `kinkcraft` | `25568` tcp+udp | running |
+| `graeme` | `25569` tcp+udp | running |
+
+- **valheim** ([`valheim.nix`](../../../nixos/boxes/colony/vms/whale2/valheim.nix)) —
+  `lloesche/valheim-server`, public server "amogus sus", world `simpland2`,
+  allow-listed Steam IDs, password from agenix.
+- **simpcraft** ([`minecraft/`](../../../nixos/boxes/colony/vms/whale2/minecraft)) —
+  `itzg/minecraft-server` (self-built `git.nul.ie/dev/craftblock` image),
+  Modrinth "Simpcraft" modpack, whitelist + ops.
+- **simpcraft-staging** — the same setup pinned to an older pack version, currently commented out.
+- **kevcraft** — vanilla Minecraft 1.20.1, extra op.
+- **kinkcraft** — same Simpcraft modpack as `simpcraft`.
+- **graeme** — vanilla Minecraft on hard difficulty with its own whitelist.
+- **enshrouded** ([`enshrouded.nix`](../../../nixos/boxes/colony/vms/whale2/enshrouded.nix)) —
+  `sknnr/enshrouded-dedicated-server` ("UWUshrouded"); the file exists but is
+  commented out of `whale2`'s `imports`, so the server is down (its forwards
+  and DNS records remain).
+
+The Minecraft containers share one whitelist/ops list and agenix env file
+(`whale2/simpcraft.env`, which also carries the RCON password).
+
+## Backups
+
+A local borg job (`services.borgbackup.jobs.simpcraft`) archives the `simpcraft` world frequently,
+offset from its autosave timer, into `/var/lib/containers/backup/simpcraft`. It uses `mcrcon` to
+`save-off`/`save-on` around each run and keeps a short history for quick world rollback rather than
+disaster recovery; the `oci` LV itself is covered by `colony`'s `borgthin`.
+
+## Notable config files
+
+- [`nixos/boxes/colony/vms/whale2/default.nix`](../../../nixos/boxes/colony/vms/whale2/default.nix) — VM config, podman/netavark setup, `extraAssignments`.
+- [`nixos/boxes/colony/vms/whale2/valheim.nix`](../../../nixos/boxes/colony/vms/whale2/valheim.nix) — Valheim server.
+- [`nixos/boxes/colony/vms/whale2/minecraft/default.nix`](../../../nixos/boxes/colony/vms/whale2/minecraft/default.nix) — the Minecraft servers + world backup job.
+- [`nixos/boxes/colony/vms/whale2/enshrouded.nix`](../../../nixos/boxes/colony/vms/whale2/enshrouded.nix) — Enshrouded server (disabled, not imported).

docs/sites/home/README.md

@@ -0,0 +1,45 @@
+# Home site
+
+The home network (domain `h.nul.ie`): a redundant pair of routers in front of a VM host, an
+NVMe-oF storage target, an IoT container host, and a workstation. The two routers — `river` (a VM)
+and `stream` (a physical box) — are built from one shared
+[`routing-common`](../../../nixos/boxes/home/routing-common) definition as an active/backup VRRP
+pair, and everything clients touch (gateway, DNS) is a floating VIP that follows the master.
+
+- **Source:** [`nixos/boxes/home/`](../../../nixos/boxes/home)
+
+## Boxes
+
+| Box | Role | Host |
+|---|---|---|
+| [`palace`](palace.md) | VM host | physical |
+| [`river`](river.md) | Primary router (VRRP pair with `stream`) | VM on `palace` |
+| [`stream`](stream.md) | Secondary router (VRRP pair with `river`) | physical |
+| [`cellar`](cellar.md) | NVMe-oF / SPDK storage target | VM on `palace` |
+| [`sfh`](sfh/README.md) | NixOS container host (containers on its page) | VM on `palace` |
+| [`castle`](castle.md) | Workstation / gaming desktop | physical |
+
+## Router VIPs
+
+Clients use per-VLAN floating VIPs as their gateway and DNS server; `keepalived` moves them between
+`river` and `stream`. The addresses, DHCP/RA behavior and failover mechanics are documented once in
+[Router VIPs](../../networking.md#router-vips) and [Router HA](../../networking.md#router-ha).
+
+## Networks
+
+The site separates core management, high-MTU trusted traffic, general trusted traffic, untrusted
+clients and the two WAN paths. VLAN IDs, prefixes, MTUs and router addressing live in the canonical
+[`home` section of networking.md](../../networking.md#home).
+
+## Switch fabric
+
+The boxes hang off three hand-configured switches — `jim` and `dave` (MikroTik, RouterOS) and
+`brian` (Ubiquiti, UniFi) — which are **not** managed by this flake. The physical topology, VLAN
+map, the Digiweb WAN path (trunked VLAN 10 + PVID 140 at the ONT edge), and the multi-ONT plan are
+documented in [switches.md](switches.md).
+
+## Wireless APs
+
+The Wi-Fi APs — `vibe` (MikroTik cAP ax) and `wave` (Cudy AX3000 on OpenWrt) — are dumb APs, also
+**not** managed by this flake. The shared VLAN-trunk design, SSIDs, per-AP management addressing,
+and the OpenWrt flash/config for `wave` are in [aps.md](aps.md).

docs/sites/home/aps.md

@@ -0,0 +1,157 @@
+# Home wireless APs
+
+Reference for the home Wi-Fi access points. Like the switches ([switches.md](switches.md)), these
+are **not** managed by this flake — they are configured on-device (RouterOS on the MikroTik,
+OpenWrt/UCI on the Cudy). This file documents the shared VLAN/trunk design and each AP.
+
+Only the DNS records live in the flake
+([`nixos/boxes/home/routing-common/dns.nix`](../../../nixos/boxes/home/routing-common/dns.nix),
+`h.nul.ie` zone). Everything else here is applied by hand on the device.
+
+## The APs
+
+| | vibe | wave |
+|---|---|---|
+| Model | MikroTik **cAP ax** (`cAPGi-5HaxD2HaxD`) | Cudy **AX3000** (OpenWrt id `cudy,ap3000-v1`) |
+| OS | RouterOS 7.x | OpenWrt 25.12.x (MT7981B / Filogic 820) |
+| Radio | 2×2 both bands | 2×2 both bands (2 spatial streams) |
+| Uplink | trunk (multi-port; `ether2` is a wired LAN port) | single **2.5 GbE** trunk |
+| Management | core/hi/lo `.15` | core/lo `.14` (**not** `hi`; see below) |
+
+Both mirror the same two SSIDs. `wave` replaced an older AP of the same name; the new one is the
+Cudy running OpenWrt.
+
+> **Note on "AX3000":** MT7981B is 2×2 (2 spatial streams). The "3000" is *aggregate* Mbps —
+> 574 (2.4 GHz 2ss) + 2402 (5 GHz 2ss @ **160 MHz**) — not three streams. `iw` confirms 2×2
+> (`Available Antennas TX/RX 0x3`; "3 streams: not supported"). 160 MHz is what earns the "3000".
+
+## Shared design (dumb AP)
+
+Every AP is a **dumb AP**: it bridges wireless clients onto the right VLAN and does **no** routing,
+DHCP, RA or firewalling. The home routers (`river`/`stream`) own DHCP/RA/gateway (per-VLAN VRRP VIPs)
+and firewalling. The uplink is a **tagged trunk**:
+
+| VLAN | `lib.my.c.home.vlans` | Role | AP use |
+|---|---|---|---|
+| — (native) | `core` | switch/fabric management (1500) | backup management (untagged) |
+| 100 | `hi` | trusted LAN, **high-MTU** (jumbo 9000) | `vibe` management (it's jumbo-capable) |
+| 110 | `lo` | trusted LAN (1500) | main SSID `wlan0`; `wave` management |
+| 120 | `untrusted` | guest network | guest SSID `wlan1` |
+
+`hi` and `lo` are both **trusted** client VLANs — the only difference is MTU (`hi` carries jumbo
+9000, `lo` is standard 1500). An AP puts its own management on whichever it can do: `vibe` (jumbo)
+sits on `hi`, `wave` (eth0 capped at 2026) sits on `lo`. The main SSID lands on `lo` because Wi-Fi
+clients are 1500 regardless.
+
+### SSIDs
+
+| SSID | Bands | Security | VLAN |
+|---|---|---|---|
+| `wlan0` (main) | 5 GHz + 2.4 GHz | WPA2/WPA3-PSK (`sae-mixed`) | 110 (`lo`) |
+| `wlan1` (guest) | 2.4 GHz | WPA2-PSK (`psk2`) | 120 (`untrusted`) |
+
+**Passphrases are never stored in this repo.** `vibe` is the source of truth; read them out-of-band
+with `ssh admin@vibe '/interface wifi export show-sensitive'` (`.passphrase=` prints **unquoted**).
+
+## vibe (MikroTik cAP ax)
+
+RouterOS, one hardware-offloaded bridge `main` with `vlan-filtering=yes`. Access: `ssh admin@vibe`
+— key auth for `admin` is installed (`~/.ssh/id_rsa`), with `admin`/`admin` as a fallback.
+
+- **Uplink `ether1`** — trunk, tagged VLANs 100/110/120; native/untagged is the default VLAN 1
+  (PVID, no IP). `ether2` is a wired **access port** on VLAN 110 (`lo`). `l2mtu 9214`.
+- **Radios** — `wifi1` (5 GHz, 20/40/80) + `wifi2` (2.4 GHz, 20/40) both broadcast `wlan0`
+  (WPA2/WPA3-PSK), untagged onto VLAN 110. `wifi3` is a virtual AP on `wifi2` broadcasting `wlan1`
+  (WPA2-PSK), untagged onto VLAN 120. `country=Ireland`.
+- **Bridge VLANs** — 100 tagged `main,ether1`; 110 tagged `main,ether1` + untagged
+  `ether2,wifi1,wifi2`; 120 tagged `main,ether1` + untagged `wifi3`.
+- **Roaming** — 802.11k/v via a `/interface wifi steering` profile (`rrm=yes wnm=yes`,
+  `neighbor-group=home-aps`) assigned to `wifi1`/`wifi2`/`wifi3`.
+- **Resolver** — the hi VIP `192.168.71.254` / `2a0e:97c0:4d0:1::ffff`.
+
+### Management
+
+Management uses host `.15`: `192.168.64.15` on native/core as a backup,
+`192.168.68.15/22` + `2a0e:97c0:4d0:1::1:6` on `hi` VLAN 100, and
+`192.168.72.15/21` + `2a0e:97c0:4d0:2::1:6` on `lo` VLAN 110. The `hi` address holds the default
+route through its VIP; `untrusted` has no address. With `l2mtu 9214`, `vibe` can use the jumbo
+`hi` network unlike `wave`.
+
+Like the switches, `vibe` is **pure L2 and must not route** — `ip-forward=no`, IPv6 `forward=no`,
+`accept-router-advertisements=no`, `ra-lifetime=0`. RouterOS ships these forwarding-on and then
+advertises itself as an IPv6 router; re-check after any upgrade. See
+[switches.md#switches-must-not-route](switches.md#switches-must-not-route) for the rationale and
+commands.
+
+## wave (Cudy AX3000, OpenWrt)
+
+Single-port AP, so the port is a VLAN **trunk** carrying management + both SSIDs.
+
+### Management addressing
+
+`wave` takes host `.14`, on **`lo` (primary) and `core` (backup)** — deliberately **not** `hi`,
+unlike the switches and `vibe`. `hi` is the jumbo (9000) VLAN, but `wave`'s eth0 caps at 2026 (see
+MTU note), so there's no reason to put it there; `lo` is 1500 with a proper VRRP VIP for the default
+route + resolver, and `core` has no VIP/v6 so it can only be a backup. No IP on `untrusted`. Records
+in `dns.nix`:
+
+| Name | VLAN | Address |
+|---|---|---|
+| `wave-core` | core (native/untagged) | `192.168.64.14/24` — backup, like the switches (no VIP → backup only) |
+| `wave` | lo 110 | `192.168.72.14/21`, `2a0e:97c0:4d0:2::1:5` — primary; holds the default route + resolver (lo VIP `192.168.79.254` / `2a0e:97c0:4d0:2::ffff`) |
+
+**Firewall:** management (SSH/LuCI) reachable from `core`/`lo` only; `untrusted` is a separate
+zone with `input REJECT` (and `wave` has no IP there) — **no management via the guest VLAN**.
+
+### brian switch port
+
+`wave` hangs off **brian** (UniFi). Its port is a **trunk**: tagged VLAN **110/120** (`lo` + guest),
+and **native/untagged = core** (the fabric's management VLAN, carrying `wave-core`). VLAN 100 (`hi`)
+is **not** needed here — `wave` isn't on `hi` (see Management addressing). Configure via the UniFi
+controller (brian has no CLI); see [switches.md](switches.md).
+
+### Flashing OpenWrt (Cudy AX3000 / `cudy_ap3000-v1`)
+
+Hardware: MT7981B, 512 MB RAM, 256 MB SPI-NAND, 1× 2.5 GbE (RTL8221B), 2×2 WiFi 6.
+
+> ⚠️ **Serial caveat:** units with a serial starting `2543…` (post ~Nov 2025) use a different flash
+> chip and can brick with older firmware. Match firmware to the unit.
+
+OpenWrt can't be flashed directly over stock. Two-stage, via a Cudy **transition** firmware (Cudy
+OpenWrt download page / `support@cudy.com`; `warnning.txt` in that bundle has the steps):
+
+1. Stock Cudy UI: update to **≥ 2.4.7** (adds TFTP `recovery.bin` recovery), then flash the Cudy
+   **intermediate** firmware (`cudy_ap3000-v1-sysupgrade_*.bin`), "keep settings" **unchecked**.
+   It reboots into an OpenWrt-based build at `192.168.1.1` (SSH `root`, empty password).
+2. From there, `sysupgrade -n` to vanilla OpenWrt (`…-cudy_ap3000-v1-squashfs-sysupgrade.bin` from
+   `downloads.openwrt.org`; this release ships **no** factory image — sysupgrade only).
+
+Stock default (out of box) is a DHCP client falling back to **`192.168.10.254`**; the stock UI is a
+customised LuCI (only 80/443, no SSH) with a first-boot "create admin password" wizard — so the
+stock-side flashing is done from a browser, not headless.
+
+### On-device config notes
+
+#### Wireless packages
+
+The package manager is `apk`, not `opkg`. Wi-Fi uses the full `wpad-mbedtls` package so all SSIDs
+can enable 802.11k/v (`ieee80211k` + `bss_transition`). Replacing `wpad-basic-mbedtls` live leaves
+the mac80211 interfaces in a start/teardown loop that reloads cannot recover; reboot after
+`apk add wpad-mbedtls`.
+
+- Radios: `radio0` = 2.4 GHz, `radio1` = 5 GHz (keyed by `band`, don't assume). 5 GHz is pinned to
+  **channel 36 / HE160** (any 160 MHz block in IE is DFS; ch36 has the shortest ~60 s CAC).
+- Bridge: `br-lan` with `vlan_filtering`, single port `eth0` — tagged `110/120`, untagged/PVID
+  VLAN 1 (= native/core). SSIDs attach via `network` = `lo`/`untrusted` (= `br-lan.110`/`.120`).
+- Dumb-AP: no DHCP pools, `odhcpd.maindhcp=0`, `delegate=0` on the L3 interfaces.
+- **MTU:** all interfaces are **1500**. The `mtk_eth_soc` 2.5 GbE (`eth0`) caps at **2026 bytes**
+  (`ip link set eth0 mtu 9000` → `SIOCSIFMTU: Invalid argument`), so `wave` can't join `hi`'s jumbo
+  (9000) fabric like `vibe` does — which is precisely **why `wave` is managed on `lo`, not `hi`**
+  (see Management addressing). Nothing on `wave` needs > 1500.
+- **LuCI:** enabled, login `root` / `admin`. **SSH:** key-only (`PasswordAuth`/`RootPasswordAuth off`).
+- `iperf3` installed for throughput testing.
+
+### Access
+
+- SSH: `ssh root@wave` (key-only; `wave`/`wave-core` resolve once `dns.nix` is deployed).
+- LuCI: `http://192.168.72.14/` (or `http://wave/`), `root` / `admin`.

docs/sites/home/castle.md

@@ -0,0 +1,63 @@
+# castle
+
+The home workstation / gaming desktop. Diskless-style: it netboots from `river` and keeps its
+root storage on NVMe-oF volumes from `cellar`.
+
+- **Source:** [`nixos/boxes/home/castle/`](../../../nixos/boxes/home/castle) (`default.nix`)
+- **Host:** physical
+- **nixpkgs:** `mine`
+
+## Hardware
+
+| Component | Inventory |
+|---|---|
+| Platform | ASUS ProArt X670E-CREATOR WIFI |
+| CPU | AMD Ryzen 9 7950X (16 cores / 32 threads) |
+| Memory | 64 GiB |
+| Graphics | Integrated AMD Radeon graphics |
+| Network | Mellanox ConnectX-4 100G, Aquantia AQC113CS 10G, Intel I225-V 2.5G and MediaTek MT7922 Wi-Fi 6E controllers |
+| System storage | No local root disk; the box netboots and uses the SPDK NVMe-oF namespace exported by `cellar` |
+
+## Role
+
+### Desktop
+
+The AMD desktop runs the GUI stack (`my.gui.enable`, Sway/Wayland via home-manager), low-latency
+PipeWire, Bluetooth and Thunderbolt. Local `libvirtd`/`virt-manager` and the IOMMU are enabled, but
+the box has no VFIO or GPU-passthrough configuration.
+
+### Netboot
+
+With `my.netboot.client.enable`, the firmware iPXE-boots from the 2.5G NIC. Kea matches
+`et2.5g`'s MAC and directs it to `boot.h.nul.ie` on [`river`](river.md).
+
+### NVMe-oF root
+
+`/nix`, `/persist` and `/home` are `/dev/nvmeof/*` LVs in `cellar`'s
+`nqn.2016-06.io.spdk:castle` namespace (`my.nvme.boot`, RDMA). The initrd brings
+up `et100g`/`lan-hi` with `roceBootModules`; the running network keeps
+`KeepConfiguration=static` so networkd does not drop the storage address. The root filesystem is a
+size-limited tmpfs (`my.tmproot`).
+
+### Other configuration
+
+Both firewalls are disabled on this trusted `hi` desktop. Other settings include `binfmt`
+emulation for `aarch64-linux`/`armv7l-linux`, `recursive-nix`, Wireshark and `rdma-core`/`qperf`;
+a `drm-amd-display` flicker patch remains commented out.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `castle`).
+
+## Networking
+
+- `et100g` (100G, MTU 9000) carries `lan-hi` (the `hi` assignment, also pinned by a kea
+  reservation on its MAC) and `lan-lo`.
+- `lan-lo` is a secondary network attachment: DHCPv4 with `UseGateway`/`UseDNS` off and RAs
+  accepted with gateway/DNS use off — present for reaching `lo` devices, never a default route.
+- `et2.5g` (netboot) and `et10g` are renamed but carry no network config.
+
+## Notable config files
+
+- [`nixos/boxes/home/castle/default.nix`](../../../nixos/boxes/home/castle/default.nix) — box
+  config: netboot/NVMe-oF boot, 100G networking, GUI/audio, virtualisation.

docs/sites/home/cellar.md

@@ -0,0 +1,48 @@
+# cellar
+
+The home storage target. A VM on `palace` that drives three passed-through NVMe disks with SPDK
+and exports them over NVMe-oF/RDMA — `river`, `sfh` and `castle` all run their root storage off
+it.
+
+- **Source:** [`nixos/boxes/home/palace/vms/cellar/`](../../../nixos/boxes/home/palace/vms/cellar)
+  (`default.nix`, `spdk.nix`)
+- **Host:** VM on `palace`
+- **nixpkgs:** `mine`
+
+## Role
+
+- Runs an **SPDK userspace target** (`my.spdk`, [`spdk.nix`](../../../nixos/boxes/home/palace/vms/cellar/spdk.nix)):
+  the kernel `nvme` driver is blacklisted so SPDK can claim the three NVMe controllers directly
+  (host BDFs `41:00.0`–`43:00.0`, attached in the guest as `02:00.0`–`04:00.0`).
+- Builds a **RAID-0** (`NVMeRaid`) across the three drives and exports one
+  partition per consumer as an **NVMe-oF subsystem over RDMA** (port 4420) on the `hi` network:
+
+  | Bdev | NQN | Consumer |
+  |---|---|---|
+  | `NVMeRaidp1` | `nqn.2016-06.io.spdk:river` | [`river`](river.md) |
+  | `NVMeRaidp2` | `nqn.2016-06.io.spdk:castle` | [`castle`](castle.md) |
+  | `NVMeRaidp3` | `nqn.2016-06.io.spdk:sfh` | [`sfh`](sfh/README.md) |
+
+  Each subsystem is pinned to its consumer's `hostnqn` (the `my.nvme.uuid` on the client side).
+- `spdk-tgt` is ordered after `lan-hi` is online; the RDMA listener binds the `hi` assignment on
+  port 4420. The VM itself is pinned to NUMA node 1 on `palace` and gets SR-IOV VF 0.
+- `netdata` (port 19999 allowed in the firewall) and `fstrim`.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `cellar`).
+
+## Notes
+
+- The `ublk_*` calls in `my.spdk.debugCommands` are only a debugging aid — they create a local
+  ublk device so the RAID can be mounted and inspected on `cellar` itself. Client exports are the
+  `nvmf` subsystems above.
+
+## Notable config files
+
+- [`nixos/boxes/home/palace/vms/cellar/default.nix`](../../../nixos/boxes/home/palace/vms/cellar/default.nix) —
+  box config (assignment, networking, netdata).
+- [`nixos/boxes/home/palace/vms/cellar/spdk.nix`](../../../nixos/boxes/home/palace/vms/cellar/spdk.nix) —
+  SPDK target: RAID-0, NVMe-oF/RDMA subsystems.
+- [`nixos/boxes/home/palace/vms/default.nix`](../../../nixos/boxes/home/palace/vms/default.nix) —
+  the VM definition on `palace` (VF 0, NVMe passthrough, NUMA pinning).

docs/sites/home/palace.md

@@ -0,0 +1,70 @@
+# palace
+
+The physical VM host for the home site. Runs the `river`, `cellar` and `sfh` VMs and feeds them
+SR-IOV VFs, PCI NVMe drives and LVM disks.
+
+- **Source:** [`nixos/boxes/home/palace/default.nix`](../../../nixos/boxes/home/palace/default.nix)
+  (VM definitions in [`palace/vms/default.nix`](../../../nixos/boxes/home/palace/vms/default.nix))
+- **Host:** physical
+- **nixpkgs:** `mine-stable`
+
+## Hardware
+
+| Component | Inventory |
+|---|---|
+| Platform | Gigabyte X399 DESIGNARE EX |
+| CPU | AMD Ryzen Threadripper 1950X (16 cores / 32 threads) |
+| Memory | 128 GiB |
+| Host storage | 500 GB Samsung SSD 860 EVO containing the EFI partition and the `main` LVM thin pool |
+| Bulk storage | Three 8 TB Seagate IronWolf disks in the `hdds` VG, providing the RAID-backed `hdd-storage` and `frigate` LVs |
+| NVMe storage | Three 2 TB Samsung NVMe devices passed through to `cellar`; SPDK combines them as the `NVMeRaid` RAID 0 device |
+| Network / graphics | Mellanox ConnectX-4 100G adapter with four SR-IOV VFs, two Intel I211 Gigabit Ethernet controllers, and an AMD Radeon RX 550/560-family GPU |
+
+## Role
+
+- Home hypervisor: VMs are declared in `my.vms.instances`
+  ([`palace/vms/default.nix`](../../../nixos/boxes/home/palace/vms/default.nix)); disks are LVs in
+  the `main` thin pool (`services.lvm.boot.thin.enable`).
+- AMD box (`kvm-amd`, `amd_iommu=on`, microcode updates); the kernel is built with
+  `ACPI_APEI_PCIEAER`/`PCIEAER` for the PCIe passthrough work below.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `palace`).
+
+## Networking
+
+100G `et100g` (mlx5, MTU 9000) uplinks to the `dave` switch and carries `lan-hi` (VLAN 100, the
+`hi` assignment). A udev rule creates four SR-IOV VFs on the PF:
+
+| VF | Consumer | VLAN handling |
+|---|---|---|
+| 0 | `cellar` | `hi` |
+| 1 | `river` | untagged VF; `river` tags its LAN and WAN VLANs |
+| 2 | `sfh` | `hi` |
+| 3 | `sfh` container MACVLAN parent | `hi` |
+
+- `lan-core` is a bridge with the `core` assignment (no gateway); the 1G
+  `lan-core-phy` and the `lan-lo-phy` VLAN ride on it. `lan-lo` is a second, L3-less bridge used
+  for VM netboot and `lo` clients.
+- The 1G `et1g0` (igb) is exported to `river` as a passthru-mode macvtap (`vm-et1g0`) — river sees
+  it as `wan-old`.
+
+## VMs
+
+| VM | vCPUs | RAM | Passthrough | Notes |
+|---|---|---|---|---|
+| `cellar` | 8c × 2t | 16 GiB | VF 0 (`44:00.1`); NVMe `41:00.0`–`43:00.0` | pinned to NUMA node 1; split IRQ chip + vIOMMU |
+| `river` | 3c × 2t | 4 GiB | VF 1 (`44:00.2`); macvtap `vm-et1g0` | only an ESP local disk (plus an installer ISO) — root is NVMe-oF from `cellar` |
+| `sfh` | 8c × 2t | 32 GiB | VF 2 (`44:00.3`), VF 3 (`44:00.4`); two USB host ports | no boot disk — netboots; gets the `hdds/frigate` LV |
+
+Boot ordering is enforced with systemd dependencies: `vm@river` waits for `cellar`'s SSH port (and
+for the `vm-et1g0` device), and `vm@sfh` waits for `river` — storage first, then the router, then
+everything that boots off both.
+
+## Notable config files
+
+- [`nixos/boxes/home/palace/default.nix`](../../../nixos/boxes/home/palace/default.nix) — host
+  hardware, networkd (links/bridges/SR-IOV), LVM.
+- [`nixos/boxes/home/palace/vms/default.nix`](../../../nixos/boxes/home/palace/vms/default.nix) —
+  VM instances and boot ordering.

docs/sites/home/river.md

@@ -0,0 +1,79 @@
+# river
+
+A home router VM on `palace` with a Digiweb PPPoE WAN on the ISP's VLAN 10. It forms the redundant
+router pair with [`stream`](stream.md).
+
+- **Source:** [`nixos/boxes/home/palace/vms/river.nix`](../../../nixos/boxes/home/palace/vms/river.nix)
+  (shared router config: [`routing-common`](../../../nixos/boxes/home/routing-common), index 0)
+- **Host:** VM on `palace`
+- **nixpkgs:** `mine`
+
+## Role
+
+At `routing-common` index 0, `river` normally holds the primary position in the router pair.
+Pair-wide addressing, VIP, DHCP/DNS and failover behavior is documented in the
+[`home` networking overview](../../networking.md#home) and [Router HA](../../networking.md#router-ha).
+This page covers `river`'s Digiweb WAN, VM platform, storage and netboot duties.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `river`).
+
+## WAN (Digiweb PPPoE)
+
+### Link and addressing
+
+`services.pppd` peer `digiweb` attaches directly to `wan-pon-isp`, the raw ISP VLAN 10
+(`vlans.pon-isp`) trunked untranslated from the ONT through `brian` and `dave`; see
+[switches.md](switches.md). The netdev has no L3 configuration and uses `MTUBytes=1508`, leaving a
+clean `mtu`/`mru 1500` after PPPoE overhead.
+
+The static `84.203.124.128` address is requested through IPCP. The provider-wide credentials are
+deliberately not secret; the peer persists indefinitely with LCP echo monitoring and ignores
+Digiweb DNS in favor of the local recursor.
+
+### Management subnet
+
+`wan-pon-ont` (VLAN 140, PVID'd at `brian`) holds `192.168.100.100/24`, reaching the ONT UI at
+`192.168.100.1`. The `.100` address follows `stream`'s modem-management convention.
+
+### WAN readiness
+
+The `pppd` hooks drive this shared gate with `DefaultDependencies=false`: `ip-up` installs the
+link-scoped default route and starts the target, while `ip-down` stops it and removes the route.
+`ipsec` and `ipv6-clear-default-route` attach through `wantedBy` + `partOf`, so they reload after
+every WAN flap.
+
+### Traffic shaping
+
+The shared `wan-ifb` ingress-shaping pieces are inert here. CAKE is specific to `stream`, and
+`networkd-dispatcher` is `mkForce false` pending scheduling tests.
+
+## Platform
+
+### Virtual machine and network attachment
+
+The 100G `lan` NIC is VF 1 of `palace`'s `et100g` (MTU 9000), with every router VLAN tagged on top
+as `55-lan`. A macvtap of `palace`'s 1G `et1g0` remains as the old `wan-old` path without L3
+configuration. Deployments use the `hi` assignment.
+
+### Storage
+
+The VM's local disk holds only an ESP; `/nix` and `/persist` are LVs on `cellar`'s
+`nqn.2016-06.io.spdk:river` namespace over RDMA. The initrd brings up `lan-hi`
+with `roceBootModules`, and `KeepConfiguration=static` prevents networkd from dropping the address
+during reconfiguration. An installer ISO remains attached.
+
+## Netboot
+
+`my.netboot.server` serves iPXE/TFTP for `sfh` and `castle` at `boot.h.nul.ie` from the `lo`
+assignment, restricted to the `hi` and `lo` prefixes.
+
+## Notable config files
+
+- [`nixos/boxes/home/palace/vms/river.nix`](../../../nixos/boxes/home/palace/vms/river.nix) — box
+  config: pppd, WAN VLANs, `wan-online.target` hooks, netboot server, NVMe-oF boot.
+- [`nixos/boxes/home/routing-common/default.nix`](../../../nixos/boxes/home/routing-common/default.nix) —
+  shared router definition (assignments, firewall/NAT, `as211024`).
+- [`nixos/boxes/home/palace/vms/default.nix`](../../../nixos/boxes/home/palace/vms/default.nix) —
+  the VM definition on `palace` (VF 1, macvtap, ESP disk).

docs/sites/home/sfh/README.md

@@ -0,0 +1,59 @@
+# sfh
+
+"Shill from home" — the NixOS container host for the home site. A VM on `palace` that netboots
+from `river` and runs its root off NVMe-oF from `cellar`.
+
+- **Source:** [`nixos/boxes/home/palace/vms/sfh/`](../../../../nixos/boxes/home/palace/vms/sfh)
+  (`default.nix`, `containers/`)
+- **Host:** VM on `palace`
+- **nixpkgs:** `mine`
+
+## Role
+
+- Runs the home NixOS containers via `my.containers.instances` (systemd-nspawn); each container is
+  its own `nixos.systems.*` entry rendered through `my.asContainer`.
+- **Netboot client** (`my.netboot.client.enable`): the VM has no boot disk — its `netboot` NIC
+  on palace's `lan-lo` bridge is matched by a kea client-class on [`river`](../river.md) and
+  iPXE-boots from `boot.h.nul.ie`.
+- **Root on NVMe-oF**: `my.nvme.boot` connects to `nqn.2016-06.io.spdk:sfh`
+  ([`cellar`](../cellar.md), RDMA) from the initrd (`lan-hi` up + `roceBootModules`); `/nix` and
+  `/persist` are LVs on that volume. `KeepConfiguration=static` on `lan-hi` protects the
+  NVMe-oF address from networkd reconfigures.
+- **Frigate footage disk**: palace passes the `hdds/frigate` LVM LV through as a virtio disk;
+  sfh mounts it at `/mnt/frigate` (by label) and bind-mounts it into the `hass` container at
+  `/var/lib/frigate`.
+- USB: two host ports are passed to the VM (qemu flags) for the Zigbee coordinator and webcam used
+  by `hass`; the nspawn unit gets `DeviceAllow` for `char-ttyUSB` and `char-video4linux`.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../networking.md#box-assignments) table (this box: `sfh`).
+
+## Networking
+
+Four NICs, all MTU 9000 where jumbo-capable:
+
+- `lan-hi` — SR-IOV VF 2, the box's own `hi` assignment.
+- `lan-hi-ctrs` — SR-IOV VF 3, no L3: the MACVLAN parent for the containers' `hi` interfaces
+  (`host0` inside each container).
+- `lan-core-ctrs` / `lan-lo-ctrs` — virtio NICs (bridged to palace's `lan-core` / `lan-lo`), no
+  L3: MACVLAN parents for containers that need a `core` or `lo` interface.
+
+The per-container MACVLAN wiring lives in `systemd.nspawn.*.networkConfig` in
+[`sfh/default.nix`](../../../../nixos/boxes/home/palace/vms/sfh/default.nix).
+
+## Containers
+
+| Container | Role |
+|---|---|
+| [`hass`](containers/hass.md) | Home Assistant + Frigate + MQTT |
+| [`unifi`](containers/unifi.md) | UniFi controller |
+
+## Notable config files
+
+- [`nixos/boxes/home/palace/vms/sfh/default.nix`](../../../../nixos/boxes/home/palace/vms/sfh/default.nix) —
+  box config: netboot/NVMe-oF boot, container instances, MACVLAN plumbing, Frigate disk.
+- [`nixos/boxes/home/palace/vms/sfh/containers/`](../../../../nixos/boxes/home/palace/vms/sfh/containers) —
+  the container system definitions.
+- [`nixos/boxes/home/palace/vms/default.nix`](../../../../nixos/boxes/home/palace/vms/default.nix) —
+  the VM definition on `palace` (VFs, USB passthrough, netboot NIC, `hdds/frigate` disk).

docs/sites/home/sfh/containers/hass.md

@@ -0,0 +1,59 @@
+# hass
+
+Home automation container: Home Assistant plus its supporting services (MQTT, camera restreaming,
+Frigate NVR), running on [`sfh`](../README.md).
+
+- **Source:** [`nixos/boxes/home/palace/vms/sfh/containers/hass.nix`](../../../../../nixos/boxes/home/palace/vms/sfh/containers/hass.nix)
+- **Host:** NixOS container on `sfh`
+- **nixpkgs:** `mine`
+
+## Role
+
+### Home Assistant
+
+`services.home-assistant` uses declarative configuration (`configWritable = false`). It enables
+the `esphome`, `zha`, `denonavr`, `webostv`, `androidtv_remote`, `heos`, `mqtt`, `wled`, `met` and
+`google_translate` components, plus custom `alarmo`, `frigate`, `west_wood_club` and Irish Rail
+integrations. A `hass-cli` wrapper uses a token from `my.secrets` to reach the local server.
+
+- **mosquitto** — MQTT broker (anonymous local listener; port 1883 allowed, alongside HTTP).
+- **go2rtc** — restreams the Reolink living-room camera (RTSP from `reolink-living-room`, on the
+  `lo` network) and the office USB webcam (`/dev/video0` via ffmpeg).
+- **Frigate** (`services.frigate`, `frigate.h.nul.ie` — the `frigate` alt name on the `hi`
+  assignment) — records both restreamed cameras with a short retention policy; detection is
+  disabled.
+- External access is via `https://hass.nul.ie` through the `middleman` reverse proxy
+  (`trusted_proxies`); internally it's `hass-ctr.h.nul.ie`.
+- Not a deploy-rs target (`my.deploy.enable = false`) — it's rendered via `my.asContainer` and
+  started by `sfh`'s `my.containers.instances`.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `hass`).
+
+## Storage
+
+Frigate footage lives on a **separate HDD LV**: `palace` passes the `hdds/frigate` LVM LV to the
+`sfh` VM, sfh mounts it at `/mnt/frigate`, and the container bind-mounts it at `/var/lib/frigate`
+(read-write). This keeps recording churn off the NVMe-oF root.
+
+## Devices
+
+Passed through from `sfh` (USB host ports on `palace`):
+
+- Nabu Casa Connect ZBT-1 Zigbee coordinator → `/dev/ttyUSB0` (used by `zha`).
+- USB webcam → `/dev/video0` (go2rtc's `webcam_office` stream).
+- The matching raw USB device node allowed through from `sfh`.
+
+## Networking
+
+MACVLAN interfaces created from `sfh`'s container NICs: `host0` on `lan-hi-ctrs` (the `hi` assignment,
+alt name `frigate`, default gateway via the VIP) and `lan-lo` on `lan-lo-ctrs` (the `lo`
+assignment, no gateway) — the `lo` interface reaches the IoT devices (the Reolink camera lives there).
+
+## Notable config files
+
+- [`nixos/boxes/home/palace/vms/sfh/containers/hass.nix`](../../../../../nixos/boxes/home/palace/vms/sfh/containers/hass.nix) —
+  container system: Home Assistant, Frigate, mosquitto, go2rtc.
+- [`nixos/boxes/home/palace/vms/sfh/default.nix`](../../../../../nixos/boxes/home/palace/vms/sfh/default.nix) —
+  the `sfh` side: bind mounts, MACVLAN wiring, `DeviceAllow`.

docs/sites/home/sfh/containers/unifi.md

@@ -0,0 +1,42 @@
+# unifi
+
+The UniFi network controller, running as a container on [`sfh`](../README.md). It manages the
+home UniFi switch `brian` (see [switches.md](../../switches.md)).
+
+- **Source:** [`nixos/boxes/home/palace/vms/sfh/containers/unifi.nix`](../../../../../nixos/boxes/home/palace/vms/sfh/containers/unifi.nix)
+- **Host:** NixOS container on `sfh`
+- **nixpkgs:** `mine`
+
+## Role
+
+- **UniFi controller** (`services.unifi`, `pkgs.unifi` on `mongodb-7_0`, firewall open; TCP 8443
+  allowed).
+- Not a deploy-rs target (`my.deploy.enable = false`) — it's rendered via `my.asContainer` and
+  started by `sfh`'s `my.containers.instances`.
+
+## Network assignments
+
+See the consolidated [network assignments](../../../../networking.md#box-assignments) table (this box: `unifi`).
+
+## Status
+
+**Currently enabled.** The container spent a while disabled — its import was commented out of
+[`containers/default.nix`](../../../../../nixos/boxes/home/palace/vms/sfh/containers/default.nix)
+while there was no UniFi gear to manage — and was re-enabled when the UniFi switch `brian` was
+added, gaining a `core` interface (`unifi-ctr-core`) at the same time so it can reach the switch on its
+management network. It is imported, listed in `sfh`'s `my.containers.instances`, and
+`services.unifi.enable = true`.
+
+## Networking
+
+Two MACVLAN interfaces come from `sfh`'s container NICs: `host0` on `lan-hi-ctrs` carries the `hi`
+assignment (`unifi-ctr`, default gateway via the VIP), while `lan-core` on `lan-core-ctrs` carries
+the gatewayless `core` assignment (`unifi-ctr-core`). The `core` interface is how the controller
+talks to `brian` and the other switches on their management network.
+
+## Notable config files
+
+- [`nixos/boxes/home/palace/vms/sfh/containers/unifi.nix`](../../../../../nixos/boxes/home/palace/vms/sfh/containers/unifi.nix) —
+  container system: UniFi service, assignments.
+- [`nixos/boxes/home/palace/vms/sfh/default.nix`](../../../../../nixos/boxes/home/palace/vms/sfh/default.nix) —
+  the `sfh` side: container instance, MACVLAN wiring.

docs/sites/home/stream.md

@@ -0,0 +1,99 @@
+# stream
+
+A physical Intel home router with a DHCP WAN from the Virgin Media cable modem. It forms the
+redundant router pair with [`river`](river.md) and is dual-homed to both switches.
+
+- **Source:** [`nixos/boxes/home/stream.nix`](../../../nixos/boxes/home/stream.nix) (shared router
+  config: [`routing-common`](../../../nixos/boxes/home/routing-common), index 1)
+- **Host:** physical
+- **nixpkgs:** `mine`
+
+## Hardware
+
+| Component | Inventory |
+|---|---|
+| Platform | BROUNION R86S |
+| CPU | Intel Celeron N5105 (4 cores / 4 threads) |
+| Memory | 16 GiB |
+| Storage | 512 GB Samsung SSD 970 PRO NVMe containing `/boot`, `/nix` and `/persist`; integrated 128 GB eMMC is present but is not used by the declared filesystems |
+| Network | Three Intel `igc` interfaces and a dual-port Mellanox `mlx4_en` adapter; `wan`, `lan-jim` and `lan-dave` use three of these ports |
+
+The platform configuration enables `kvm-intel`, `intel_iommu=on` and Intel microcode updates.
+
+## Role
+
+At `routing-common` index 1, `stream` normally holds the secondary position in the router pair.
+Pair-wide addressing, VIP, DHCP/DNS and failover behavior is documented in the
+[`home` networking overview](../../networking.md#home) and [Router HA](../../networking.md#router-ha).
+This page covers `stream`'s Virgin Media WAN, physical platform and redundant switch attachment.
+
+## Network assignments
+
+See the consolidated [network assignments](../../networking.md#box-assignments) table (this box: `stream`).
+
+## WAN (Virgin Media DHCP)
+
+### Link and addressing
+
+`wan` is a renamed igc NIC (`00:f0:cb:ee:ca:dd`) towards the cable modem. The modem segment is
+switch VLAN 130; `jim` handles the tag, so the box interface is untagged. See
+[switches.md](switches.md) for the fabric side.
+
+`DHCP=ipv4` pulls the public lease. `dhcpV4Config.UseDNS=false` points resolution at the local
+recursor, and `IPv6AcceptRA=false` because public IPv6 arrives over the tunnel rather than this WAN.
+
+### Management subnet
+
+The static `192.168.0.100/24` address (host `.100` of `prefixes.modem.v4`) sits on `wan` without a
+gateway, keeping the modem UI reachable alongside the DHCP lease.
+
+### WAN readiness
+
+`wan-wait-online.service` polls until the DHCP default route exists, then satisfies
+`wan-online.target`. The route is the gate because the permanent modem address would make
+networkd's wait-online report success before the public lease arrives, allowing `ipsec` to start
+without its public `left=` address.
+
+### Traffic shaping
+
+Egress is shaped at the `wan` root qdisc. A `routing-common` `networkd-dispatcher` rule redirects
+ingress through `tc`/`mirred` into `wan-ifb`; each direction has its own configured bandwidth and
+uses the DOCSIS overhead preset.
+
+### Per-box `routing-common` options
+
+The modem's management subnet shares the `wan` interface, which `routing-common` itself knows
+nothing about — it declares two per-box options
+([`routing-common/default.nix`](../../../nixos/boxes/home/routing-common/default.nix)) that this
+box sets:
+
+- `my.homeRouter.dns.wanSkipBroadcasts` — skip the modem subnet's broadcast address when
+  auto-selecting the router's own `wan` A record for the zone's LUA record.
+- `my.homeRouter.firewall.untrustedRejectV4` — reject untrusted clients from
+  reaching the modem subnet (needed only because it shares `wan`; WAN egress is otherwise
+  accepted).
+
+## Switching (RSTP)
+
+`stream` is dual-homed to both switches: `lan-jim` (igc) and `lan-dave` (mlx4_en), both MTU 9000,
+are enslaved to the `lan` bridge with `STP=true`. The explicit bridge-port costs prefer
+`lan-dave` at 10 over `lan-jim` at 100. [`routing-common/mstpd.nix`](../../../nixos/boxes/home/routing-common/mstpd.nix)
+runs a patched `mstpd` and forces RSTP on `lan` once it is configured, so exactly one uplink carries
+traffic at a time. (The remaining NICs are renamed `et2`/`et5` and left unconfigured.)
+
+## Deployment
+
+`my.deploy.node.hostname` is currently commented out.
+
+## Disabled printer services
+
+`octoprint` and `mjpg-streamer` are defined but disabled (`enable = false`).
+
+## Notable config files
+
+- [`nixos/boxes/home/stream.nix`](../../../nixos/boxes/home/stream.nix) — box config: DHCP WAN,
+  modem management, CAKE, `wan-online.target` gate, STP bridge.
+- [`nixos/boxes/home/routing-common/default.nix`](../../../nixos/boxes/home/routing-common/default.nix) —
+  shared router definition (index 1).
+- [`nixos/boxes/home/routing-common/mstpd.nix`](../../../nixos/boxes/home/routing-common/mstpd.nix) —
+  RSTP on the `lan` bridge.

docs/sites/home/switches.md

@@ -0,0 +1,235 @@
+# Home switches
+
+Reference for the two MikroTik switches on the home network — **jim** and **dave** — plus the
+Ubiquiti switch **brian**, and how the home boxes and the Digiweb WAN hang off them. These switches
+are **not** managed by this flake; they are configured by hand (RouterOS on jim/dave, UniFi on
+brian). It covers the physical topology, the VLAN map, and how the Digiweb WAN reaches river.
+
+In short: the Digiweb ISP VLAN (10) is trunked straight through to river (which runs PPPoE on it),
+and the ONT's untagged management is PVID'd onto VLAN 140 at brian, its edge switch. VLAN 10 is
+carried untranslated because a single ONT makes it unique on the fabric — see
+[the WAN path](#the-digiweb-wan-path-trunked-vlan-10--pvid-140) and
+[why not translation](#why-not-translation-for-one-ont). The router side lives in
+[river.md](river.md); the logical network map in [networking.md](../../networking.md). The Wi-Fi
+APs that hang off these switches are in [aps.md](aps.md).
+
+## The switches
+
+| | jim | dave | brian |
+|---|---|---|---|
+| Identity | `jim-sw` | `dave-sw` | (UniFi) |
+| Model | CRS326-24G-2S+ | CRS504-4XQ | Ubiquiti Switch Pro XG 8 PoE |
+| Switch chip | Marvell 98DX3236 | Marvell 98DX4310 (+ Atheros 8227 for the 1G mgmt port) | — |
+| OS | RouterOS | RouterOS | UniFi |
+| Ports | 24×1G + 2×SFP+ | 4×QSFP28 (100G, breakout-capable) + 1G mgmt | 8×10GBASE-T PoE + 2×10G SFP+ |
+| Bridge | `main`, `vlan-filtering=yes` | `main`, `vlan-filtering=yes` | UniFi VLAN profiles |
+
+jim and dave run a single hardware-offloaded bridge (`main`) with VLAN filtering. Access to the
+MikroTiks is SSH as `admin` / `admin` by short hostname (see [Accessing the switches](#accessing-the-switches)).
+Only jim and dave can do hardware VLAN translation (`/interface ethernet switch rule` on the Marvell
+chips); brian cannot rewrite tags, only trunk/PVID them.
+
+## Physical topology
+
+The two WAN sources enter at the top: the Virgin Media modem lands on **jim** (VLAN 130), and the
+Digiweb **ONT** lands on **brian**. Both `jim` and `brian` are edge switches that uplink down into
+the **dave** core; the home boxes hang off dave's 100G ports, with backup links up to jim. jim's
+`wan-pon-in` (`sfp-sfpplus2`) is a spare SFP+ port, unused today.
+
+```
+  Virgin Media cable modem                         Digiweb ONT
+  stream WAN, VLAN 130                             river WAN, management + VLAN 10
+             |                                               |
+            jim                                            brian
+             | 10G trunk                         802.3ad LAG |
+             +--------------------+          +---------------+
+                                  |          |
+                              +---+----------+---+
+                              |      dave        |
+                              +--------+---------+
+                                       |
+                 +---------------------+---------------------+
+                 |                     |                     |
+             palace (100G)         castle (100G)          stream
+             river VM              NVMe-oF root           second router
+
+  Backup links to jim (normally idle):
+    * palace: 1G
+    * stream: 1G; STP selects the active link
+    * castle: 2.5G, normally down; no live failover
+```
+
+Notes:
+- **river** runs as a VM on the **palace** host; its uplink is dave's 100G `palace` port. jim also
+  has 1G `palace`/`stream` ports, but those are secondary links and do **not** carry the WAN.
+- **stream** (the second router box) is dual-homed to both jim and dave (STP picks the active path).
+
+### Castle storage dependency
+
+`castle` is dual-homed without STP: its primary link is dave's 100G `castle` port (`et100g`), while
+the 2.5G link to jim (`et2.5g`) is normally down and provides no live failover. Its root disk is
+NVMe-oF over `et100g` and dave, so interrupting either freezes `castle` mid-I/O. Do dave maintenance
+from a box that does not depend on it, or power `castle` off cleanly first.
+
+## VLANs
+
+| VLAN | Name | Purpose |
+|---|---|---|
+| — (native) | core | Switch management, `192.168.64.0/24` (jim `.10`, dave `.11`, brian `.13`) |
+| 100 | hi | High-performance / jumbo network (MTU 9000) |
+| 110 | lo | Standard LAN |
+| 120 | untrusted | Guest / untrusted network |
+| 130 | wan | **stream's WAN** — Virgin Media cable modem (untagged on jim's `wan1`/`wan2`/`wan-in`) |
+| 140 | wan-pon-ont | ONT management, `192.168.100.0/24` (PVID'd at the ONT edge) |
+| 10 | pon-isp | Digiweb ISP transport — **trunked straight through** to river, PPPoE runs on it |
+| 141 | wan-pon-isp | **Reserved** — the translated ISP VLAN for the future multi-ONT design |
+
+Switch L3 presence (`/interface vlan` on `main`) exists **only** for VLANs the switch is managed
+from — `hi` (100) and `lo` (110), plus native core. WAN and guest VLANs deliberately have no switch
+L3 interface. jim and dave carry a static IPv4 and **global IPv6** address on `hi`/`lo` (plus a
+static default route on each stack) purely for management — they are **pure L2, never routers**. See
+[Switches must not route](#switches-must-not-route).
+
+## The Digiweb WAN path (trunked VLAN 10 + PVID 140)
+
+The ONT presents two things on one wire:
+- **untagged** management traffic (`192.168.100.x`), and
+- **tagged VLAN 10** carrying the Digiweb ISP session (the BRAS requires VLAN 10).
+
+With a **single ONT** there's no reason to translate anything — VLAN 10 is unique on the fabric, so
+we just carry it end to end and let river run PPPoE directly on it:
+
+1. **Untagged mgmt → VLAN 140, at the ONT's edge switch (brian).** brian sets the ONT port's PVID to
+   140 so the untagged management traffic becomes VLAN 140, and allows tagged VLAN 10 through the
+   same port. river takes `192.168.100.100/24` on VLAN 140 (matching stream's modem-mgmt `.100`) to
+   reach the ONT web UI at `192.168.100.1`. Doing the PVID at the ONT-facing edge keeps it clean —
+   the untagged frames never share a domain with anything else.
+
+2. **VLAN 10 (ISP) trunked straight through, untranslated.** brian → dave → palace carry tagged
+   VLAN 10 by ordinary bridge-VLAN membership. No `/interface ethernet switch rule`, no pinning, no
+   asymmetric-learning issues — it's just a normal tagged VLAN. river attaches PPPoE to VLAN 10
+   directly (`wan-pon-isp` netdev = VLAN `pon-isp` = 10; baby-jumbo MTU 1508 so PPP nets a clean
+   1500).
+
+Net result: **river runs PPPoE single-tagged on VLAN 10 and holds a VLAN 140 address to reach the
+ONT.** See [`nixos/boxes/home/palace/vms/river.nix`](../../../nixos/boxes/home/palace/vms/river.nix)
+for the river side.
+
+```
+ONT -- untagged + VLAN 10 -- brian -- VLAN 140 + VLAN 10 -- dave -- palace -- river
+                              |
+                              +-- ONT port PVID 140; VLAN 10 remains tagged
+```
+
+### Why not translation (for one ONT)?
+
+Translation would swap VLAN 10 → 141 with two pinned hardware ACL rules to keep VLAN 10 off the rest
+of the fabric. That buys nothing with a single ONT — VLAN 10 is already unique, so trunking it is
+simpler and rule-free. Translation only earns its keep when **two** ONTs both deliver VLAN 10 and
+would collide (below).
+
+## Switch configuration
+
+How each switch is set up for the Digiweb WAN path. **Confirm any change on the box before applying**
+(see [Accessing the switches](#accessing-the-switches)).
+
+**brian (UniFi)** — hosts the ONT:
+- The ONT port has **native/untagged network = VLAN 140** (PVID) and is a **tagged member of VLAN 10**,
+  so the ONT's untagged management lands on 140 and its tagged ISP frames pass through.
+- The `brian-downlink` LAG up to dave trunks **tagged 140 + tagged 10** (alongside the LAN VLANs).
+
+**dave (RouterOS)** — trunks both WAN-pon VLANs to `brian-downlink` and `palace`. The ISP VLAN 10 row:
+```
+/interface bridge vlan add bridge=main vlan-ids=10 tagged=brian-downlink,palace
+```
+VLAN 140 also spans `brian-downlink,palace` (it carries a few other members too). No switch rules —
+this is plain tagged bridging.
+
+**jim (RouterOS)** — carries **none** of the Digiweb WAN path: no translation rules, and no VLAN
+10/140/141 rows. `wan-pon-in` (`sfp-sfpplus2`) sits at `pvid=1` as a spare port. jim only handles
+stream's VLAN-130 WAN and the LAN VLANs.
+
+## Switches must not route
+
+jim and dave (and the `vibe` AP) are **pure L2** — river/stream do all routing. Their per-stack
+management addresses and static default routes exist only so the boxes themselves can be reached and
+reach out; they must **never** forward traffic or advertise themselves as routers. RouterOS defaults
+work against this: `ip-forward` and IPv6 `forward` ship **on**, and with IPv6 forwarding on RouterOS
+also emits Router Advertisements (`ra-lifetime=30m`) on every L3 interface — so a switch silently
+becomes a competing IPv6 default router. This surfaced after the 7.18 → 7.23 upgrade, when clients
+picked up dave/jim as default routers alongside river.
+
+The required config on each RouterOS box:
+```
+/ip settings set ip-forward=no
+/ipv6 settings set forward=no accept-router-advertisements=no
+/ipv6 nd set [find] ra-lifetime=0
+```
+- `ip-forward=no` / `forward=no` — no L3 forwarding on either stack; IPv6 `forward=no` also stops RA
+  emission at the source.
+- `accept-router-advertisements=no` — with forwarding off RouterOS would otherwise start *accepting*
+  RAs; this keeps the box on its deterministic **static** default route.
+- `ra-lifetime=0` — belt-and-suspenders: even if forwarding is ever re-enabled the box advertises
+  router-lifetime 0 (i.e. "not a default router"). Setting it also emits a withdrawal RA that
+  actively clears the rogue default from clients (they otherwise cache it for up to ~30 min).
+
+**After any RouterOS upgrade, re-check `/ip settings` and `/ipv6 settings`** — an upgrade can reset
+these to the forwarding-on defaults. brian (UniFi) is not a RouterOS box and was not affected.
+
+## Future: multiple ONTs (per-port VLAN translation)
+
+If a second ONT arrives (e.g. a Digiweb line for stream, or a second river), trunking breaks: both
+ONTs deliver **tagged VLAN 10**, and plain bridge-VLAN filtering can't tell them apart. That's when
+translation earns its place — a switch rule matches on the **ingress port**, so each ONT's VLAN 10
+becomes a *distinct* fabric VLAN:
+
+- ONT-A port: VLAN 10 → **141** (→ river)
+- ONT-B port: VLAN 10 → **142** (→ stream / second river)
+- mgmt: PVID each ONT port onto its own VLAN (140, 143, …) so both ONTs' `192.168.100.1` stay in
+  separate L2/L3 domains.
+
+The forward direction isolates naturally (each ONT maps to a different fabric VLAN). The **return**
+direction is where port targeting is mandatory: both translate *back* to VLAN 10, so bridge VLAN 10
+now has two members and a plain FDB-miss flood would leak one ONT's upstream to the other. Each
+return must be pinned to its port with `new-dst-ports`:
+```
+# ONT-A: 141 in on palace → 10, forced out ONT-A's port
+# ONT-B: 142 in on stream → 10, forced out ONT-B's port
+```
+Each ONT port must also be a tagged member of bridge VLAN 10 for correct egress tagging (the missing
+piece that otherwise shows up as pppd "Timeout waiting for PADO"). The pins bypass the FDB, so the
+two ISP sessions never mix.
+
+**Why a new switch:** jim (the only box with spare SFP+ *and* the translation feature) has just
+**one** free SFP+ port, so it can't host two ONTs. The plan is a dedicated
+**CRS305-1G-4S+** (4×SFP+, same Marvell rule support) to land multiple ONTs and do the per-port
+translation there, feeding distinct fabric VLANs up to dave.
+
+## Accessing the switches
+
+The switches resolve by **short hostname** on the home network — the home routers serve their
+records in the home zone
+([`nixos/boxes/home/routing-common/dns.nix`](../../../nixos/boxes/home/routing-common/dns.nix):
+`jim` → hi `.10`, `dave` → hi `.11`, `brian` → core `.13`). From a box on the home network just
+`ssh admin@jim` / `admin@dave`.
+
+**Key auth** for `admin` is installed on jim/dave (and the `vibe` AP) — `ssh -i ~/.ssh/id_rsa
+admin@jim` works keyless (imported via `/user ssh-keys import`). Password `admin`/`admin` remains as
+a fallback. Non-interactive password pattern (avoids the ssh-agent hang) if the key isn't available:
+
+```
+sshpass -p admin ssh -o IdentityAgent=none -o PubkeyAuthentication=no \
+  -o PreferredAuthentications=password -o StrictHostKeyChecking=accept-new \
+  -o UserKnownHostsFile=/tmp/sw_known_hosts admin@jim
+```
+
+**Always confirm config changes on the switch** (print the affected menu, apply, re-verify). brian
+is UniFi — configured through its controller, not RouterOS CLI.
+
+## Management IPs
+
+| | core (`192.168.64.0/24`) | hi (`192.168.68.0/22`) | lo (`192.168.72.0/21`) |
+|---|---|---|---|
+| jim | `.10` (on `main`) | `.10` | `.10` |
+| dave | `.11` (on `management`, the 1G Atheros port) | `.11` | `.11` |
+| brian | `.13` (core) | — | — |

flake.lock

@@ -163,6 +163,29 @@
         "type": "github"
       }
     },
+    "determinate-nix": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "git-hooks-nix": "git-hooks-nix",
+        "nixpkgs": [
+          "nixpkgs-unstable"
+        ],
+        "nixpkgs-23-11": "nixpkgs-23-11",
+        "nixpkgs-regression": "nixpkgs-regression"
+      },
+      "locked": {
+        "lastModified": 1785428605,
+        "narHash": "sha256-wfaiSRLM1wDb4MV+NEzbyheK9Y03/oe56NR2I84UF7E=",
+        "rev": "0ff46631f69584c9f76792cae595ea253bd482c3",
+        "revCount": 26288,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/DeterminateSystems/nix-src/3.21.9/019fb409-4d6e-7243-8a88-23ceee2520e9/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/DeterminateSystems/nix-src/%2A"
+      }
+    },
     "devshell": {
       "inputs": {
         "flake-utils": "flake-utils",
@@ -256,6 +279,42 @@
         "type": "github"
       }
     },
+    "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "determinate-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1748821116,
+        "narHash": "sha256-F82+gS044J1APL0n4hH50GYdPRv/5JWm34oCJYmVKdE=",
+        "rev": "49f0870db23e8c1ca0b5259734a02cd9e1e371a1",
+        "revCount": 377,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/hercules-ci/flake-parts/0.1.377%2Brev-49f0870db23e8c1ca0b5259734a02cd9e1e371a1/01972f28-554a-73f8-91f4-d488cc502f08/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/hercules-ci/flake-parts/0.1"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -460,6 +519,30 @@
         "type": "github"
       }
     },
+    "git-hooks-nix": {
+      "inputs": {
+        "flake-compat": "flake-compat_2",
+        "gitignore": [
+          "determinate-nix"
+        ],
+        "nixpkgs": [
+          "determinate-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1747372754,
+        "narHash": "sha256-2Y53NGIX2vxfie1rOW0Qb86vjRZ7ngizoo+bnXU9D9k=",
+        "rev": "80479b6ec16fefd9c1db3ea13aeb038c60530f46",
+        "revCount": 1026,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/cachix/git-hooks.nix/0.1.1026%2Brev-80479b6ec16fefd9c1db3ea13aeb038c60530f46/0196d79a-1b35-7b8e-a021-c894fb62163d/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/cachix/git-hooks.nix/0.1.941"
+      }
+    },
     "harmonia": {
       "inputs": {
         "crane": "crane",
@@ -655,6 +738,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-23-11": {
+      "locked": {
+        "lastModified": 1717159533,
+        "narHash": "sha256-oamiKNfr2MS6yH64rUn99mIZjc45nGJlj9eGth/3Xuw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a62e6edd6d5e1fa0329b8653c801147986f8d446",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a62e6edd6d5e1fa0329b8653c801147986f8d446",
+        "type": "github"
+      }
+    },
     "nixpkgs-mine": {
       "locked": {
         "lastModified": 1781356656,
@@ -687,6 +786,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-regression": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
     "nixpkgs-stable": {
       "locked": {
         "lastModified": 1780902259,
@@ -847,6 +962,7 @@
         "borgthin": "borgthin",
         "copyparty": "copyparty",
         "deploy-rs": "deploy-rs",
+        "determinate-nix": "determinate-nix",
         "devshell": "devshell_3",
         "flake-utils": "flake-utils_6",
         "harmonia": "harmonia",

flake.nix

@@ -1,6 +1,19 @@
 {
   description = "System configs";
 
+  # Offer our Harmonia cache when building the flake itself, so `nix develop` / `nix build` don't
+  # rebuild from source. Nix reads `nixConfig` before the flake evaluates and rejects any computed
+  # value (imports/thunks), so these must stay literal — keep them in sync with `lib.my.c.nix.cache`.
+  # Consumers must trust these (accept-flake-config / a trusted user) for them to take effect.
+  nixConfig = {
+    extra-substituters = [
+      "https://nix-cache.nul.ie"
+    ];
+    extra-trusted-public-keys = [
+      "nix-cache.nul.ie-1:BzH5yMfF4HbzY1C977XzOxoPhEc9Zbu39ftPkUbH+m4="
+    ];
+  };
+
   inputs = {
     flake-utils.url = "github:numtide/flake-utils";
     # libnet.url = "github:reo101/nix-lib-net";
@@ -21,6 +34,12 @@
     home-manager-stable.url = "home-manager/release-26.05";
     home-manager-stable.inputs.nixpkgs.follows = "nixpkgs-stable";
 
+    # Determinate Nix, used as the common Nix implementation across systems, homes, the devshell and
+    # CI (see lib.my.c.nix). We build it ourselves against our pinned nixpkgs (FlakeHub's cache needs
+    # auth), so it flows through our own Harmonia cache like everything else.
+    determinate-nix.url = "https://flakehub.com/f/DeterminateSystems/nix-src/*";
+    determinate-nix.inputs.nixpkgs.follows = "nixpkgs-unstable";
+
     # Stuff used by the flake for build / deployment
     # ragenix.url = "github:yaxitech/ragenix";
     ragenix.url = "github:devplayer0/ragenix/add-rekey-one-flag";
@@ -49,6 +68,13 @@
     copyparty.inputs.nixpkgs.follows = "nixpkgs-unstable";
     hass-west-wood.url = "github:devplayer0/hass-west-wood";
     hass-west-wood.inputs.nixpkgs.follows = "nixpkgs-unstable";
+    # Disabled: `pi-coding-agent-bun` breaks `nix flake check` in CI. Its bun2nix `fetchBunDeps`
+    # calls `builtins.filterSource` on subpaths of the pi.nix flake source (coding-agent/bun.nix),
+    # which requires that source derivation to be realised in the local store. On a fresh CI runner
+    # it isn't, so eval aborts with `path '…-source.drv' is not valid`. Works locally only because
+    # the source is already realised there. Re-enable (and revisit upstream) if we start using pi.
+    # pi-agent.url = "github:lukasl-dev/pi.nix";
+    # pi-agent.inputs.nixpkgs.follows = "nixpkgs-unstable";
   };
 
   outputs =
@@ -76,6 +102,22 @@
       };
       pkgsLibOverlay = final: prev: { lib = prev.lib.extend libOverlay; };
       myPkgsOverlay = final: prev: import ./pkgs { lib = final.lib; pkgs = prev; };
+      # Exposes Determinate Nix under a stable attr name so systems, homes and the devshell all
+      # resolve the exact same package (referenced as `pkgs'.mine.determinate-nix` in configs).
+      # `nix-util`'s `readLinkAt.works` unit test creates PATH_MAX-length symlinks, which our CI
+      # runner's XFS-backed build filesystem rejects (XFS hard-caps symlink targets at 1024 bytes).
+      # Skip just that test via gtest's GTEST_FILTER so the rest of the suite still gates the build.
+      determinateOverlay = final: prev: {
+        determinate-nix =
+          (inputs.determinate-nix.packages.${prev.stdenv.hostPlatform.system}.default).overrideAttrs (o: {
+            checkInputs = map
+              (drv:
+                if (drv.name or "") == "nix-util-tests-run"
+                then drv.overrideAttrs (_: { GTEST_FILTER = "-readLinkAt.*"; })
+                else drv)
+              o.checkInputs;
+          });
+      };
 
       # Override the flake-level lib since we're going to use it for non-config specific stuff
       pkgsFlakes = mapAttrs (_: pkgsFlake: pkgsFlake // { lib = pkgsFlake.lib.extend libOverlay; }) {
@@ -104,6 +146,7 @@
             pkgsLibOverlay
 
             myPkgsOverlay
+            determinateOverlay
             inputs.devshell.overlays.default
             inputs.ragenix.overlays.default
             inputs.deploy-rs.overlays.default
@@ -119,6 +162,7 @@
             pkgsLibOverlay
 
             myPkgsOverlay
+            determinateOverlay
           ];
 
           config = {
@@ -180,7 +224,13 @@
       nixosModules = nixfiles.config.nixos.modules;
       homeModules = nixfiles.config.home-manager.modules;
 
-      nixosConfigurations = mapAttrs (_: s: s.rendered) nixfiles.config.nixos.systems;
+      # Containers and the installer override `rendered` with a bare `extendModules` config
+      # (`my.asContainer` / `my.asISO`) that lacks the `pkgs`/`lib` attrs `eval-config` exposes on a
+      # normal system. Determinate Nix's flake schemas read `machine.pkgs.stdenv.system` for every
+      # `nixosConfigurations` entry, so re-attach them from the full system eval (`configuration`).
+      nixosConfigurations = mapAttrs
+        (_: s: s.rendered // { inherit (s.configuration) pkgs lib; })
+        nixfiles.config.nixos.systems;
       homeConfigurations = mapAttrs (_: s: s.configuration) nixfiles.config.home-manager.homes;
 
       deploy = nixfiles.config.deploy-rs.rendered;

home-manager/modules/common.nix

@@ -2,12 +2,15 @@
 let
   inherit (builtins) listToAttrs mapAttrs readFile;
   inherit (lib)
-    optionalString nameValuePair concatMapStrings concatStringsSep optionalAttrs versionAtLeast
+    optionalString nameValuePair concatMapStrings concatStringsSep optionalAttrs
     mapAttrsToList mkMerge mkIf mkDefault mkOption;
   inherit (lib.hm) dag;
   inherit (lib.my) mkOpt' dummyOption;
 in
 {
+  # Disabled: breaks `nix flake check` in CI (see flake.nix pi-agent note).
+  # imports = [ inputs.pi-agent.homeModules.default ];
+
   options = with lib.types; {
     my = {
       isStandalone = mkOption {
@@ -27,6 +30,7 @@ in
       };
     };
   };
+
   config = mkMerge [
     {
       my = {
@@ -46,8 +50,7 @@ in
       };
 
       nix = {
-        package = mkIf (!(versionAtLeast config.home.stateVersion "22.11")) pkgs.nix;
-        settings = with lib.my.c.nix; {
+        settings = with lib.my.c.nix; determinateSettings // {
           experimental-features = [ "nix-command" "flakes" "ca-derivations" ];
           max-jobs = mkDefault "auto";
 
@@ -213,6 +216,7 @@ in
           jq
           yq-go
           nix-tree
+          treemd
         ];
 
         sessionVariables = {
@@ -229,6 +233,7 @@ in
           inputs.deploy-rs.overlays.default
           inputs.boardie.overlays.default
           inputs.nixGL.overlays.default
+          # inputs.pi-agent.overlays.default
         ];
         config = {
           allowUnfree = true;
@@ -251,13 +256,13 @@ in
         ssh.authKeys.files = [ lib.my.c.sshKeyFiles.me ];
       };
 
-      nix.package = mkIf (versionAtLeast config.home.stateVersion "22.05") pkgs.nix;
+      nix.package = pkgs'.mine.determinate-nix;
 
       fonts.fontconfig.enable = true;
 
       home = {
         packages = with pkgs; [
-          pkgs'.mine.nix
+          pkgs'.mine.determinate-nix
         ];
 
         # Without this, we are at the mercy of whatever version of nix is in $PATH...

home-manager/modules/gui/default.nix

@@ -71,8 +71,10 @@ in
 
             python3Packages.python-lsp-server
             nil # nix language server
+            nixd # another nix language server
             zls # zig language server
             rust-analyzer
+            pyright
 
             cowsay
             fortune
@@ -85,6 +87,18 @@ in
 
             ffmpeg-full
             xournalpp
+
+            # Disabled: breaks `nix flake check` in CI (see flake.nix pi-agent note).
+            # (pkgs.symlinkJoin {
+            #   name = "pi-coding-agent";
+            #   buildInputs = [ pkgs.makeWrapper ];
+            #   paths = [ pkgs.pi-coding-agent-bun ];
+            #   postBuild = ''
+            #     wrapProgram $out/bin/pi \
+            #       --set NPM_CONFIG_PREFIX ${config.home.homeDirectory}/.pi/npm/ \
+            #       --prefix PATH : ${pkgs.lib.makeBinPath [ pkgs.nodejs_latest ]}
+            #   '';
+            # })
           ];
         };
 

lib/constants.nix

@@ -111,6 +111,13 @@ rec {
         extra-trusted-public-keys = ${concatStringsSep " " keys}
       '';
     };
+
+    # Determinate-specific settings enabling its performance features. Only understood by the
+    # Determinate Nix binary, so they must not be emitted for a base-Nix package.
+    determinateSettings = {
+      lazy-trees = true;
+      eval-cores = 0;
+    };
   };
 
   pubDomain = "nul.ie";
@@ -307,14 +314,23 @@ rec {
 
   home = rec {
     domain = "h.${pubDomain}";
+    # Search domains advertised to clients (radvd DNSSL / kea domain-search)
+    searchDomains = [ domain "dyn.${domain}" colony.domain britway.domain ];
     vlans = {
       hi = 100;
       lo = 110;
       untrusted = 120;
       wan = 130;
-      wan-pon = 131;
 
+      # Digiweb delivers the ISP VLAN (pon-isp, 10) single-tagged at the ONT alongside the ONT's
+      # own untagged management traffic. With a single ONT we trunk pon-isp (10) straight through
+      # the switches to river (PPPoE runs directly on it), and the switch at the ONT edge PVIDs the
+      # untagged management port onto wan-pon-ont (140). wan-pon-isp (141) is reserved for the
+      # future multi-ONT case, where per-port VLAN translation on a dedicated switch swaps each
+      # ONT's VLAN 10 to a distinct fabric VLAN (see docs/sites/home/switches.md).
       pon-isp = 10;
+      wan-pon-ont = 140;
+      wan-pon-isp = 141;
     };
     hiMTU = 9000;
     routers = [
@@ -322,7 +338,7 @@ rec {
       "stream"
     ];
     routersPubV4 = [
-      "109.255.108.88"
+      "84.203.124.128" # river: Digiweb static
       "109.255.108.121"
     ];
 
@@ -330,6 +346,9 @@ rec {
       modem = {
         v4 = "192.168.0.0/24";
       };
+      ont = {
+        v4 = "192.168.100.0/24";
+      };
       all = {
         v4 = "192.168.64.0/18";
         v6 = "2a0e:97c0:4d0::/60";
@@ -373,6 +392,16 @@ rec {
       };
     };
 
+    # networkConfig fragment anchoring a VLAN client's DNS on the router pair's
+    # VRRP VIPs rather than the RA RDNSS. v6 addresses here are RA/token-derived,
+    # so when RA is absent (e.g. v6 disabled) there is no v6 and no RDNSS at all;
+    # the always-present static v4 VIP keeps name resolution working, with the v6
+    # VIP as a bonus when v6 is up. Merge into the VLAN network's networkConfig.
+    vlanDns = vlan: {
+      DNS = [ vips.${vlan}.v4 vips.${vlan}.v6 ];
+      Domains = searchDomains;
+    };
+
     roceBootModules = [ "ib_core" "ib_uverbs" "mlx5_core" "mlx5_ib" ];
   };
 

lib/default.nix

@@ -107,7 +107,7 @@ rec {
     then throw "\nFailed assertions:\n${concatStringsSep "\n" (map (x: "- ${x}") failedAssertions)}"
     else showWarnings config.warnings res;
 
-  homeStateVersion' = hmBranch: (if (hmBranch == "stable" || hmBranch == "mine-stable") then "22.11" else "23.05");
+  homeStateVersion' = hmBranch: "23.05";
   homeStateVersion = hmBranch: {
     # The flake passes a default setting, but we don't care about that
     home.stateVersion = mkForce (homeStateVersion' hmBranch);
@@ -149,6 +149,10 @@ rec {
       (optional (a.ipv6.gateway != null) a.ipv6.gateway);
     networkConfig = {
       IPv6AcceptRA = a.ipv6.gateway == null || a.ipv6.iid != null;
+      # These are servers: temporary (privacy) addresses only rotate our stable source
+      # address out from under long-lived connected sockets (e.g. nginx's resolver, which
+      # wedges permanently when the address it bound to expires).
+      IPv6PrivacyExtensions = "no";
       # NOTE: LLDP emission / reception is ignored on bridge interfaces
       LLDP = true;
       EmitLLDP = "customer-bridge";
@@ -191,7 +195,7 @@ rec {
     };
     lvmDisk' = vg: lv: lvmDisk'' lv vg lv;
     lvmDisk = lvmDisk' "main";
-    disk = vm: lv: lvmDisk' lv "vm-${vm}-${lv}";
+    disk = vm: lv: lvmDisk'' lv "main" "vm-${vm}-${lv}";
   };
 
   deploy-rs =

nixos/boxes/colony/vms/default.nix

@@ -212,8 +212,8 @@
             cleanShutdown.timeout = 120;
             drives = [
               (mkMerge [ (vm.disk "darts" "root") { frontendOpts.bootindex = 0; } ])
-              (vm.lvmDisk' "media" "darts-media")
-              (vm.lvmDisk' "ext" "darts-ext")
+              (vm.lvmDisk'' "media" "main" "darts-media")
+              (vm.lvmDisk'' "ext" "main" "darts-ext")
             ];
           };
         };

nixos/boxes/colony/vms/estuary/dns.nix

@@ -114,8 +114,12 @@ in
         ];
         also-notify = [ "127.0.0.1" ];
         allow-axfr-ips = [
+          "127.0.0.0/8" "::1/128"
           "216.218.133.2" "2001:470:600::2"
-        ];
+        ]
+        ++ lib.my.c.home.routersPubV4
+        ++ lib.my.c.as211024.trusted.v4
+        ++ lib.my.c.as211024.trusted.v6;
         enable-lua-records = true;
         #loglevel = 7;
         #log-dns-queries = true;

nixos/boxes/colony/vms/git/default.nix

@@ -38,6 +38,8 @@ in
       let
         inherit (lib) mkMerge;
         inherit (lib.my) networkdAssignment;
+
+        podmanSubnet = "10.88.0.0/16";
       in
       {
         imports = [
@@ -158,7 +160,7 @@ in
               oci-containers = {
                 backend = "podman";
               };
-              containers.containersConf.settings.network.default_subnet = "10.88.0.0/16";
+              containers.containersConf.settings.network.default_subnet = podmanSubnet;
             };
 
             systemd.network = {
@@ -195,7 +197,7 @@ in
                 extraRules = ''
                   table inet filter {
                     chain forward {
-                      ip saddr 10.88.0.0/16 accept
+                      ip saddr ${podmanSubnet} accept
                     }
                   }
                 '';

nixos/boxes/colony/vms/git/gitea-actions.nix

@@ -1,7 +1,14 @@
 { lib, pkgs, config, ... }:
 let
   inherit (lib) mkForce;
+  inherit (lib.my) net;
   inherit (lib.my.c) pubDomain;
+
+  # The podman bridge gateway (first host of the default subnet); job
+  # containers reach the runner's artifact cache server here, through a single
+  # fixed port opened in the firewall below.
+  podmanGateway = net.cidr.host 1 config.virtualisation.containers.containersConf.settings.network.default_subnet;
+  cachePort = 34567;
 in
 {
   config = {
@@ -34,6 +41,11 @@ in
             cache = {
               enabled = true;
               dir = "/var/cache/gitea-runner";
+              # Announce the podman bridge gateway rather than let act_runner
+              # autodetect the box's outbound address, which containers can't
+              # route back to.
+              host = podmanGateway;
+              port = cachePort;
             };
           };
         };
@@ -73,6 +85,15 @@ in
           group = "gitea-runner";
         };
       };
+
+      # Let job containers reach the runner's artifact cache server on the host.
+      firewall.extraRules = ''
+        table inet filter {
+          chain input {
+            iifname "podman0" tcp dport ${toString cachePort} accept
+          }
+        }
+      '';
     };
   };
 }

nixos/boxes/colony/vms/shill/containers/toot.nix

@@ -48,8 +48,9 @@ in
                   "s3-secret-key.txt"
                 ])
                 (_: with config.services.mastodon; {
-                  owner = user;
-                  inherit group;
+                  # user doesn't exist any more, so this breaks on deploy
+                  # owner = user;
+                  # inherit group;
                 })) // {
                   "toot/pds.env" = {
                     owner = "pds";

nixos/boxes/home/castle/default.nix

@@ -2,7 +2,7 @@
 let
   inherit (lib.my) net;
   inherit (lib.my.c) networkd;
-  inherit (lib.my.c.home) domain vlans prefixes vips roceBootModules;
+  inherit (lib.my.c.home) domain vlans prefixes vips vlanDns roceBootModules;
 in
 {
   nixos.systems.castle = {
@@ -189,8 +189,12 @@ in
               };
               "40-lan-hi" = mkMerge [
                 (networkdAssignment "lan-hi" assignments.hi)
+                {
+                  networkConfig = vlanDns "hi" // {
                     # So we don't drop the IP we use to connect to NVMe-oF!
-                { networkConfig.KeepConfiguration = "static"; }
+                    KeepConfiguration = "static";
+                  };
+                }
               ];
               "45-lan-lo" = {
                 matchConfig.Name = "lan-lo";

nixos/boxes/home/palace/default.nix

@@ -2,7 +2,7 @@
 let
   inherit (lib.my) net mkVLAN;
   inherit (lib.my.c) pubDomain;
-  inherit (lib.my.c.home) domain vlans prefixes vips hiMTU;
+  inherit (lib.my.c.home) domain vlans prefixes vips vlanDns hiMTU;
 in
 {
   imports = [ ./vms ];
@@ -203,7 +203,10 @@ in
                   MACAddress=52:54:00:90:34:95
                 '';
               };
-              "60-lan-hi" = networkdAssignment "lan-hi" assignments.hi;
+              "60-lan-hi" = mkMerge [
+                (networkdAssignment "lan-hi" assignments.hi)
+                { networkConfig = vlanDns "hi"; }
+              ];
 
               "50-lan-core-phy" = {
                 matchConfig.Name = "lan-core-phy";

nixos/boxes/home/palace/vms/cellar/default.nix

@@ -2,7 +2,7 @@
 let
   inherit (lib.my) net;
   inherit (lib.my.c) pubDomain;
-  inherit (lib.my.c.home) domain prefixes vips hiMTU;
+  inherit (lib.my.c.home) domain prefixes vips vlanDns hiMTU;
 in
 {
   nixos.systems.cellar = {
@@ -79,7 +79,10 @@ in
               };
 
               networks = {
-                "80-lan-hi" = networkdAssignment "lan-hi" assignments.hi;
+                "80-lan-hi" = mkMerge [
+                  (networkdAssignment "lan-hi" assignments.hi)
+                  { networkConfig = vlanDns "hi"; }
+                ];
               };
             };
 

nixos/boxes/home/palace/vms/river.nix

@@ -8,10 +8,23 @@
 
     configuration = { lib, modulesPath, pkgs, config, assignments, allAssignments, ... }:
     let
+      inherit (builtins) elemAt;
       inherit (lib) mkForce mkMerge;
-      inherit (lib.my) networkdAssignment mkVLAN;
+      inherit (lib.my) net networkdAssignment mkVLAN;
       inherit (lib.my.c) networkd;
-      inherit (lib.my.c.home) vlans domain prefixes roceBootModules;
+      inherit (lib.my.c.home) vlans domain prefixes roceBootModules routersPubV4;
+
+      # river reaches the ONT over its 100G `lan` uplink to the dave switch (which downlinks to
+      # brian, where the ONT lands). Digiweb delivers the ISP VLAN (pon-isp, 10) single-tagged at
+      # the ONT alongside the ONT's untagged management traffic. With a single ONT there's no VLAN
+      # collision, so the switches simply trunk the ISP's VLAN 10 straight through to river (PPPoE
+      # runs directly on it) and PVID the ONT's untagged management port onto wan-pon-ont (140).
+      # river takes .100 in the ONT's /24 (matching stream's modem-mgmt .100) to reach its web
+      # UI at 192.168.100.1. (See docs/sites/home/switches.md for the switch side and the multi-ONT plan.)
+      ontV4 = net.cidr.host 100 prefixes.ont.v4;
+
+      # river is routing-common index 0; the Digiweb static IP we request via IPCP
+      pubV4 = elemAt routersPubV4 0;
     in
     {
       imports = [
@@ -83,10 +96,11 @@
               enable = true;
               # Password is shared across all Digiweb customers, so no need for a secret
               config = ''
-                plugin pppoe.so wan-vlan-inner
+                plugin pppoe.so wan-pon-isp
                 name "digiweb@nga.digiweb.ie"
                 password "digiweb"
-                noipdefault
+                # request our static IP as the local address in IPCP (local:remote, remote left open)
+                ${pubV4}:
                 # no usepeerdns: we ignore Digiweb's resolvers and use the local recursive resolver
                 lcp-echo-interval 1
                 lcp-echo-failure 4
@@ -104,9 +118,10 @@
           };
         };
 
-        # PPPoE WAN (Digiweb): pppd owns the `wan` interface on top of VLAN 10, and its
-        # ip-up/ip-down hooks toggle the shared wan-online.target. Nothing else Wants the
-        # target, so it stays inactive until the link is actually up.
+        # PPPoE WAN (Digiweb): pppd owns the `wan` interface on top of wan-pon-isp (the switch's
+        # swap of the ISP's VLAN 10), and its ip-up/ip-down hooks toggle the shared
+        # wan-online.target. Nothing else Wants the target, so it stays inactive until the link
+        # is actually up.
         systemd.targets.wan-online.unitConfig.DefaultDependencies = false;
 
         environment.etc = {
@@ -132,8 +147,9 @@
 
         systemd.network = {
           netdevs = mkMerge [
-            (mkVLAN "wan-vlan-outer" vlans.wan-pon)
-            (mkVLAN "wan-vlan-inner" vlans.pon-isp)
+            (mkVLAN "wan-pon-ont" vlans.wan-pon-ont)
+            # The ISP VLAN is trunked through untranslated, so this is the raw pon-isp (10)
+            (mkVLAN "wan-pon-isp" vlans.pon-isp)
           ];
 
           links = {
@@ -165,21 +181,28 @@
 
           networks = {
             "55-lan" = {
-              vlan = [ "wan-vlan-outer" ];
+              # both WAN VLANs arrive single-tagged on the 100G uplink to dave: wan-pon-ont (140,
+              # the ONT's management, PVID-tagged at the brian edge) and the ISP's VLAN 10, trunked
+              # straight through
+              vlan = [ "wan-pon-ont" "wan-pon-isp" ];
             };
             # So we don't drop the IP we use to connect to NVMe-oF!
             "60-lan-hi".networkConfig.KeepConfiguration = "static";
 
-            "70-wan-vlan-outer" = {
-              matchConfig.Name = "wan-vlan-outer";
-              vlan = [ "wan-vlan-inner" ];
-              networkConfig = networkd.noL3;
-              # baby jumbo: 1508 so the inner VLAN below can also carry it
-              linkConfig.MTUBytes = "1508";
+            # ONT management: the brian edge PVIDs the ONT's untagged port onto wan-pon-ont, so give
+            # ourselves an address in its /24 to reach the ONT's web UI at 192.168.100.1.
+            "70-wan-pon-ont" = {
+              matchConfig.Name = "wan-pon-ont";
+              address = [ "${ontV4}/24" ];
+              linkConfig = {
+                RequiredForOnline = "no";
+                MTUBytes = "1500";
               };
-            # pppd attaches PPPoE to this; just needs to be up with no L3
-            "71-wan-vlan-inner" = {
-              matchConfig.Name = "wan-vlan-inner";
+            };
+            # pppd attaches PPPoE to this; just needs to be up with no L3. This is the ISP's
+            # VLAN 10 trunked straight through from the ONT (no switch translation; see "55-lan").
+            "71-wan-pon-isp" = {
+              matchConfig.Name = "wan-pon-isp";
               linkConfig = {
                 RequiredForOnline = "no";
                 # baby jumbo: PPPoE's 8B overhead leaves a clean 1500 on ppp

nixos/boxes/home/palace/vms/sfh/containers/hass.nix

@@ -2,7 +2,7 @@
 let
   inherit (lib.my) net;
   inherit (lib.my.c) pubDomain;
-  inherit (lib.my.c.home) domain prefixes vips hiMTU;
+  inherit (lib.my.c.home) domain prefixes vips vlanDns hiMTU;
 in
 {
   nixos.systems.hass = { config, ... }: {
@@ -82,7 +82,10 @@ in
 
         systemd = {
           network.networks = {
-            "80-container-host0" = networkdAssignment "host0" assignments.hi;
+            "80-container-host0" = mkMerge [
+              (networkdAssignment "host0" assignments.hi)
+              { networkConfig = vlanDns "hi"; }
+            ];
             "80-container-lan-lo" = networkdAssignment "lan-lo" assignments.lo;
           };
         };

nixos/boxes/home/palace/vms/sfh/containers/unifi.nix

@@ -1,7 +1,7 @@
 { lib, ... }:
 let
   inherit (lib.my) net;
-  inherit (lib.my.c.home) domain prefixes vips hiMTU;
+  inherit (lib.my.c.home) domain prefixes vips vlanDns hiMTU;
 in
 {
   nixos.systems.unifi = { config, ... }: {
@@ -58,7 +58,10 @@ in
 
         systemd = {
           network.networks = {
-            "80-container-host0" = networkdAssignment "host0" assignments.hi;
+            "80-container-host0" = mkMerge [
+              (networkdAssignment "host0" assignments.hi)
+              { networkConfig = vlanDns "hi"; }
+            ];
             "80-lan-core" = networkdAssignment "lan-core" assignments.core;
           };
         };

nixos/boxes/home/palace/vms/sfh/default.nix

@@ -1,7 +1,7 @@
 { lib, ... }:
 let
   inherit (lib.my) net;
-  inherit (lib.my.c.home) domain prefixes vips hiMTU roceBootModules;
+  inherit (lib.my.c.home) domain prefixes vips vlanDns hiMTU roceBootModules;
 in
 {
   imports = [ ./containers ];
@@ -134,8 +134,10 @@ in
           networks = {
             "30-lan-hi" = mkMerge [
               (networkdAssignment "lan-hi" assignments.hi)
+              {
                 # So we don't drop the IP we use to connect to NVMe-oF!
-              { networkConfig.KeepConfiguration = "static"; }
+                networkConfig = vlanDns "hi" // { KeepConfiguration = "static"; };
+              }
             ];
             "30-lan-hi-ctrs" = {
               matchConfig.Name = "lan-hi-ctrs";

nixos/boxes/home/routing-common/default.nix

@@ -11,12 +11,6 @@ in
 {
   nixos.systems."${name}" = {
     assignments = {
-      modem = {
-        ipv4 = {
-          address = net.cidr.host (254 - index) prefixes.modem.v4;
-          gateway = null;
-        };
-      };
       core = {
         name = "${name}-core";
         inherit domain;
@@ -100,9 +94,11 @@ in
 
     configuration = { lib, pkgs, config, assignments, allAssignments, ... }:
       let
-        inherit (lib) mkIf mkMerge mkForce;
-        inherit (lib.my) networkdAssignment;
+        inherit (lib) mkIf mkMerge mkForce optionalString concatStringsSep;
+        inherit (lib.my) mkOpt' networkdAssignment;
         inherit (lib.my.c) networkd;
+
+        cfg = config.my.homeRouter;
       in
       {
         imports = map (m: import m index) [
@@ -112,6 +108,20 @@ in
           ./kea.nix
         ];
 
+        # Per-box WAN-management specifics: the Virgin Media modem on stream lives on the `wan`
+        # interface itself, whereas river's ONT sits on its own interface. Declared as options the
+        # box sets so routing-common itself carries no modem/ONT knowledge.
+        options.my.homeRouter = with lib.types; {
+          dns.wanSkipBroadcasts = mkOpt' (listOf str) [ ] ''
+            Broadcast addresses to exclude when auto-selecting the router's own `wan` A record,
+            for extra static subnets that share the `wan` interface.
+          '';
+          firewall.untrustedRejectV4 = mkOpt' (listOf str) [ ] ''
+            IPv4 prefixes untrusted clients must be explicitly rejected from reaching. Only needed
+            for subnets sharing the `wan` interface, since `wan` egress is otherwise accepted.
+          '';
+        };
+
         config = {
           environment = {
             systemPackages = with pkgs; [
@@ -338,7 +348,7 @@ in
                     return
                   }
                   chain filter-untrusted {
-                    ip daddr ${prefixes.modem.v4} reject
+                    ${optionalString (cfg.firewall.untrustedRejectV4 != [ ]) "ip daddr { ${concatStringsSep ", " cfg.firewall.untrustedRejectV4} } reject"}
                     oifname wan accept
                     return
                   }

nixos/boxes/home/routing-common/dns.nix

@@ -64,7 +64,13 @@ in
           };
 
           outgoing = {
-            source_address = [ "0.0.0.0" "::" ];
+            # Query authoritative servers over IPv4 only. Our IPv6 default route runs over the
+            # as211024 mesh (`ip -6 route show default`), a proto-static route that isn't
+            # withdrawn when the mesh flaps (e.g. during ipsec churn) — it just blackholes. With
+            # "::" here the recursor keeps picking IPv6 to reach NS, stalls on timeouts, and
+            # takes recursion down with it. IPv4 upstream goes out the WAN directly and stays up;
+            # we still serve AAAA records regardless of transport.
+            source_address = [ "0.0.0.0" ];
           };
 
           recursor = {
@@ -164,6 +170,12 @@ in
           "0.0.0.0:5353" "[::]:5353"
         ];
         also-notify = [ "127.0.0.1" ];
+        allow-axfr-ips = [
+          "127.0.0.0/8" "::1/128"
+          allAssignments.estuary.internal.ipv4.address
+        ]
+        ++ lib.my.c.as211024.trusted.v4
+        ++ lib.my.c.as211024.trusted.v6;
         enable-lua-records = true;
         # loglevel = 7;
         # log-dns-queries = true;
@@ -200,7 +212,7 @@ in
             ${name} IN LUA ${lib.my.dns.ifaceA {
               inherit pkgs;
               iface = "wan";
-              skipBroadcasts = [ (lib.my.netBroadcast prefixes.modem.v4) ];
+              skipBroadcasts = config.my.homeRouter.dns.wanSkipBroadcasts;
             }}
             ${otherName} IN LUA ${lib.my.dns.lookupIP {
               inherit pkgs;
@@ -236,10 +248,14 @@ in
             shytzel IN A ${net.cidr.host 12 prefixes.core.v4}
             brian IN A ${net.cidr.host 13 prefixes.core.v4}
 
-            wave IN A ${net.cidr.host 12 prefixes.hi.v4}
-            ; wave IN AAAA ${net.cidr.host (65536+3) prefixes.hi.v6}
-            vibe IN A ${net.cidr.host 13 prefixes.hi.v4}
-            vibe IN AAAA ${net.cidr.host (65536+4) prefixes.hi.v6}
+            vibe-core IN A ${net.cidr.host 15 prefixes.core.v4}
+            vibe IN A ${net.cidr.host 15 prefixes.hi.v4}
+            vibe IN AAAA ${net.cidr.host (65536+6) prefixes.hi.v6}
+            vibe-lo IN A ${net.cidr.host 15 prefixes.lo.v4}
+            vibe-lo IN AAAA ${net.cidr.host (65536+6) prefixes.lo.v6}
+            wave-core IN A ${net.cidr.host 14 prefixes.core.v4}
+            wave IN A ${net.cidr.host 14 prefixes.lo.v4}
+            wave IN AAAA ${net.cidr.host (65536+5) prefixes.lo.v6}
 
             ups IN A ${net.cidr.host 20 prefixes.lo.v4}
             palace-kvm IN A ${net.cidr.host 21 prefixes.lo.v4}

nixos/boxes/home/routing-common/kea.nix

@@ -1,8 +1,8 @@
 index: { lib, pkgs, config, assignments, allAssignments, ... }:
 let
-  inherit (lib) mkForce;
+  inherit (lib) mkForce concatStringsSep;
   inherit (lib.my) net netbootKeaClientClasses;
-  inherit (lib.my.c.home) domain prefixes vips hiMTU;
+  inherit (lib.my.c.home) domain searchDomains prefixes vips hiMTU;
 
   dns-servers = [
     {
@@ -59,7 +59,7 @@ in
             }
             {
               name = "domain-search";
-              data = "${domain}, dyn.${domain}, ${lib.my.c.colony.domain}, ${lib.my.c.britway.domain}";
+              data = concatStringsSep ", " searchDomains;
               always-send = true;
             }
           ];

nixos/boxes/home/routing-common/mstpd.nix

@@ -24,7 +24,7 @@ in
   services = {
     networkd-dispatcher.rules = {
       configure-mstpd = {
-        onState = [ "routable" ];
+        onState = [ "configured" ];
         script = ''
           #!${pkgs.runtimeShell}
           if [ "$IFACE" = "lan" ]; then

nixos/boxes/home/routing-common/radvd.nix

@@ -1,8 +1,8 @@
 index: { lib, pkgs, ... }:
 let
-  inherit (lib) mkForce concatMapStringsSep;
+  inherit (lib) mkForce concatMapStringsSep concatStringsSep;
   inherit (lib.my) net;
-  inherit (lib.my.c.home) domain prefixes vips;
+  inherit (lib.my.c.home) domain searchDomains prefixes vips;
 
   # untrusted uses external (Cloudflare) resolvers, matching the v4 kea config;
   # trusted VLANs use the internal recursor via its floating VRRP VIP
@@ -18,7 +18,7 @@ let
       AdvLinkMTU ${toString prefixes."${name}".mtu};
       prefix ${prefixes."${name}".v6} {};
       RDNSS ${rdnss name} {};
-      DNSSL ${domain} dyn.${domain} ${lib.my.c.colony.domain} ${lib.my.c.britway.domain} {};
+      DNSSL ${concatStringsSep " " searchDomains} {};
      };
   '';
 in

nixos/boxes/home/stream.nix

@@ -6,11 +6,16 @@
     nixpkgs = "mine";
     home-manager = "mine";
 
-    configuration = { lib, pkgs, config, assignments, ... }:
+    configuration = { lib, pkgs, config, ... }:
     let
       inherit (lib) mkMerge;
-      inherit (lib.my) networkdAssignment;
+      inherit (lib.my) net;
       inherit (lib.my.c) networkd;
+      inherit (lib.my.c.home) prefixes;
+
+      # Static address on the Virgin Media modem's management subnet. Kept as a plain interface
+      # address (not a network assignment) since it's local to this box's WAN uplink.
+      modemV4 = net.cidr.host 100 prefixes.modem.v4;
     in
     {
       imports = [ ./routing-common/mstpd.nix ];
@@ -77,7 +82,7 @@
           };
         };
 
-        # wan carries a permanent static modem-management address (assignments.modem)
+        # wan carries a permanent static modem-management address (modemV4)
         # alongside the DHCP public IP, so wait-online@wan reports "online" as soon as
         # the static address is up - before the DHCP lease arrives. ipsec's left= is the
         # public IP, so gating on wait-online lets it start unoriented and never connect.
@@ -110,10 +115,7 @@
                 Name = "lan";
                 Kind = "bridge";
               };
-              extraConfig = ''
-                [Bridge]
-                STP=true
-              '';
+              bridgeConfig.STP = true;
             };
           };
           links = {
@@ -170,10 +172,12 @@
             "50-lan-jim" = {
               matchConfig.Name = "lan-jim";
               networkConfig.Bridge = "lan";
+              bridgeConfig.Cost = 100;
             };
             "50-lan-dave" = {
               matchConfig.Name = "lan-dave";
               networkConfig.Bridge = "lan";
+              bridgeConfig.Cost = 10;
             };
 
             "50-wan-ifb" = {
@@ -190,13 +194,16 @@
                 CompensationMode=none
               '';
             };
-            "50-wan" = mkMerge [
-              (networkdAssignment "wan" assignments.modem)
-              {
+            "50-wan" = {
               matchConfig.Name = "wan";
+              # Static modem-management address alongside the DHCP public lease. It has no
+              # gateway, so the wan-wait-online gate keys off the DHCP default route instead.
+              address = [ "${modemV4}/24" ];
               DHCP = "ipv4";
               dns = [ "127.0.0.1" "::1" ];
               dhcpV4Config.UseDNS = false;
+              # IPv4-only WAN (public IPv6 arrives over the tunnel, not this link).
+              networkConfig.IPv6AcceptRA = false;
 
               qdiscConfig = {
                 Parent = "ingress";
@@ -208,8 +215,7 @@
                 Bandwidth=48M
                 RTTSec=50ms
               '';
-              }
-            ];
+            };
           };
         };
 
@@ -218,6 +224,12 @@
             key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPYTB4zeAqotrEJ8M+AiGm/s9PFsWlAodz3hYSROGuDb";
           };
           server.enable = true;
+          # The modem's management subnet shares the `wan` interface: skip its address when
+          # picking our own wan A record, and reject untrusted clients from reaching it.
+          homeRouter = {
+            dns.wanSkipBroadcasts = [ (lib.my.netBroadcast prefixes.modem.v4) ];
+            firewall.untrustedRejectV4 = [ prefixes.modem.v4 ];
+          };
           # deploy.node.hostname = "192.168.68.2";
         };
       };

nixos/default.nix

@@ -100,6 +100,40 @@ let
       ] ++ defs;
     };
 
+  # JSON dump of the custom `my.*` options, rendered to docs/ by `update-docs-options`.
+  # Built from a minimal synthetic system (the shared modules are applied to every system,
+  # so any eval exposes the same option declarations) rather than a real box, so defaults
+  # don't pick up a specific host's values.
+  optionsDoc =
+    let
+      eval = mkSystem {
+        name = "options-doc";
+        config' = {
+          system = "x86_64-linux";
+          nixpkgs = "mine";
+          home-manager = "mine";
+          hmNixpkgs = "mine";
+          docCustom = false;
+          assignments = { };
+        };
+        defs = [ ];
+      };
+      pkgs = pkgs'.mine."x86_64-linux";
+    in
+    (pkgs.nixosOptionsDoc {
+      options = { my = eval.options.my; };
+      warningsAreErrors = false;
+      # Rewrite store-path declarations to repo-relative so the reference can link module
+      # files. The internal `asX` build-target options are dropped by nixosOptionsDoc itself.
+      transformOptions = opt: opt // {
+        declarations = map
+          (decl:
+            let m = builtins.match ".*-source/(.*)" (toString decl); in
+            if m != null then builtins.head m else decl)
+          opt.declarations;
+      };
+    }).optionsJSON;
+
   assignmentOpts = with lib.types; { name, config, ... }: {
     options = {
       name = mkOpt' str name "Name of assignment.";
@@ -154,8 +188,11 @@ let
     options = {
       inherit (commonOpts) system nixpkgs home-manager;
       hmNixpkgs = commonOpts.nixpkgs;
-      # This causes a (very slow) docs rebuild on every change to a module's options it seems
-      # TODO: Currently broken with infinite recursion...
+      # Routes the custom modules into `baseModules` so the NixOS manual documents them. The old
+      # infinite-recursion is gone, but enabling this makes every system build regenerate the
+      # manual, and it documents everything the modules transitively import — including third-party
+      # modules that aren't doc-clean (e.g. `services.sharry`). Prefer the generated
+      # `nixos.optionsDoc` reference (`docs/reference/nixos-options.md`) instead.
       docCustom = mkBoolOpt' false "Whether to document nixfiles' custom NixOS modules.";
 
       assignments = mkOpt' (attrsOf (submoduleWith {
@@ -197,6 +234,11 @@ in
         description = "All network assignments.";
         readOnly = true;
       };
+      optionsDoc = mkOption {
+        type = package;
+        description = "nixosOptionsDoc JSON dump of the custom `my.*` module options.";
+        readOnly = true;
+      };
       vpns = {
         l2 = mkOpt' (attrsOf (submodule l2MeshOpts)) { } "Layer 2 meshes.";
       };
@@ -224,7 +266,7 @@ in
     ];
 
     nixos = {
-      inherit allAssignments;
+      inherit allAssignments optionsDoc;
     };
   };
 }

nixos/modules/borgthin.nix

@@ -3,7 +3,7 @@ let
   inherit (builtins) substring match;
   inherit (lib)
     nameValuePair optional optionalString optionalAttrs mapAttrs' mapAttrsToList concatStringsSep
-    concatMapStringsSep mkIf;
+    concatMapStringsSep mkIf mkOption literalExpression;
   inherit (lib.my) mkOpt' mkBoolOpt';
 
   jobType = with lib.types; submodule ({ name, ... }@args:
@@ -15,12 +15,22 @@ let
       repo = mkOpt' str null "borg repository URL";
       passFile = mkOpt' (nullOr str) null "Path to file containing passphrase";
 
-      archivePrefix = mkOpt' str "${config.networking.hostName}-${name}-" "Prefix to start new archives with";
+      archivePrefix = mkOption {
+        type = str;
+        default = "${config.networking.hostName}-${name}-";
+        defaultText = literalExpression ''"''${config.networking.hostName}-''${name}-"'';
+        description = "Prefix to start new archives with";
+      };
       dateFormat = mkOpt' str "+%Y-%m-%dT%H:%M:%S" "Format passed to the date command";
       compression = mkOpt' str "zstd,3" "Compression options";
       lvs = mkOpt' (listOf str) null "Thin LVs to backup (vg/lv format)";
       prune = {
-        pattern = mkOpt' str "sh:${cfg.archivePrefix}*" "Borg pattern to select archives for pruning";
+        pattern = mkOption {
+          type = str;
+          default = "sh:${cfg.archivePrefix}*";
+          defaultText = literalExpression ''"sh:''${config.archivePrefix}*"'';
+          description = "Borg pattern to select archives for pruning";
+        };
         keep = mkOpt' (attrsOf (either int str)) { } "Borg pruning params";
       };
 
@@ -129,7 +139,12 @@ in
     thinToolsPackage = mkOpt' package pkgs.thin-provisioning-tools "Package containing thin-provisioning-tools";
     # Really we should use the version from the overlay, but the package is quite far behind...
     # Not bothering to update until Borg 2.0 releases
-    package = mkOpt' package inputs.borgthin.packages.${config.nixpkgs.system}.borgthin "borgthin package";
+    package = mkOption {
+      type = package;
+      default = inputs.borgthin.packages.${config.nixpkgs.system}.borgthin;
+      defaultText = literalExpression "inputs.borgthin.packages.\${system}.borgthin";
+      description = "borgthin package";
+    };
     jobs = mkOpt' (attrsOf jobType) { } "borgthin jobs";
   };
 

nixos/modules/build.nix

@@ -190,6 +190,9 @@ let
     type = unspecified;
     default = ext;
     visible = "shallow";
+    # Build-target plumbing: the default evaluates a whole alternate system, so keep
+    # it out of the generated option docs (see `optionsDoc` in flake.nix).
+    internal = true;
     description = "Configuration as ${desc}.";
   };
 in

nixos/modules/common.nix

@@ -50,9 +50,9 @@ in
       };
 
       nix = {
-        package = pkgs'.mine.nix;
+        package = pkgs'.mine.determinate-nix;
         channel.enable = false;
-        settings = with lib.my.c.nix; {
+        settings = with lib.my.c.nix; determinateSettings // {
           trusted-users = [ "@wheel" ];
           experimental-features = [ "nix-command" "flakes" "ca-derivations" ];
           extra-substituters = cache.substituters;
@@ -83,6 +83,7 @@ in
           inputs.boardie.overlays.default
           inputs.copyparty.overlays.default
           inputs.hass-west-wood.overlays.default
+          # inputs.pi-agent.overlays.default
         ];
         config = {
           allowUnfree = true;

nixos/modules/netboot/default.nix

@@ -1,6 +1,6 @@
 { lib, pkgs, config, ... }:
 let
-  inherit (lib) mkMerge mkIf mkForce genAttrs concatMapStringsSep;
+  inherit (lib) mkMerge mkIf mkForce genAttrs concatMapStringsSep mkOption literalExpression;
   inherit (lib.my) mkOpt' mkBoolOpt';
 
   cfg = config.my.netboot;
@@ -47,7 +47,12 @@ in
     server = {
       enable = mkBoolOpt' false "Whether a netboot server should be enabled.";
       ip = mkOpt' str null "IP clients should connect to via TFTP.";
-      host = mkOpt' str config.networking.fqdn "Hostname clients should connect to over HTTP / NFS.";
+      host = mkOption {
+        type = str;
+        default = config.networking.fqdn;
+        defaultText = literalExpression "config.networking.fqdn";
+        description = "Hostname clients should connect to over HTTP / NFS.";
+      };
       allowedPrefixes = mkOpt' (listOf str) null "Prefixes clients should be allowed to connect from (NFS).";
       installer = {
         storeSize = mkOpt' str "16GiB" "Total allowed writable size of store.";

pkgs/default.nix

@@ -11,4 +11,20 @@ in
   chocolate-doom2xx = callPackage ./chocolate-doom2xx { };
   windowtolayer = callPackage ./windowtolayer.nix { };
   swaylock-plugin = callPackage ./swaylock-plugin.nix { };
+
+  update-docs-assignments = pkgs.writeShellScriptBin "update-docs-assignments" ''
+    exec ${pkgs.python3}/bin/python3 ${../ci/update-docs-assignments.py} "$@"
+  '';
+
+  update-docs-options = pkgs.writeShellScriptBin "update-docs-options" ''
+    exec ${pkgs.python3}/bin/python3 ${../ci/update-docs-options.py} "$@"
+  '';
+
+  update-docs-dns =
+    let
+      python = pkgs.python3.withPackages (ps: [ ps.dnspython ]);
+    in
+    pkgs.writeShellScriptBin "update-docs-dns" ''
+      exec ${python}/bin/python3 ${../ci/update-docs-dns.py} "$@"
+    '';
 }