Capture the periodic upgrade of the four nixpkgs channels and
home-manager as a repo doc: check for a NixOS stable bump first, rebase
the devplayer0 fork against upstream (re-verifying the patch stack
against freshly fetched refs), run the update commands, sweep
version-gated TODOs, and review the remaining flake inputs.
Keep the canonical, agent-agnostic procedure in docs/ and point both
AGENTS.md and a thin Claude Code skill at it.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
