[dezren39]

Phase A of the 2026-10-30 "make it system NixOS config + survey everything" pass.

Finding: the muse-proxy stack was already declarative. systemd.user.services.muse-proxy in home/common/default.nix (#2104) generates exactly the live unit — evaluating this flake at origin/main yields ExecStart /nix/store/7bxcdg21iqjmiinxh0bl92kyjwrbmkdn-muse-proxy-start-unit, byte-identical to the running unit, and the full nixosConfigurations.amd config evaluates clean. Direct mode (#2753) needed no unit change: same port (18747), same checkout start script (which unsets META_API_KEY and leaves egress unpinned), credential read at runtime from ~/.config/muse/auth.json and never part of the config.

This PR only extends the unit comment so the NixOS source of truth records direct mode and the muse-direct provider relationship. Comment-only: re-evaluating after the edit produces the identical ExecStart, so the generated unit is unchanged and no activation/restart is implied. The hand unit Drew asked about is not hand-made — it is this HM unit; nothing is superseded at activation.

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[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-30T14:57:29.114710Z	9e64e2d	PR opened

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