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# Global agent context (all harnesses, all machines)
One file, every harness: this is `common/AGENTS.md` in the nixos-config repo,
deployed by `profiles/sandbox.nix` to `/etc/AGENTS.md` and symlinked to
each harness's global context path (`~/.claude/CLAUDE.md`,
`~/.config/opencode/AGENTS.md`, `~/.pi/agent/AGENTS.md`). To change it, edit it
in nixos-config and rebuild — it is read-only everywhere else on purpose.
## Machines
- `kusanagi` — workstation
- `enzo` — laptop
Both are NixOS, configured by the flake in `nixos-config`.
## You are running as system user `yokai` (the agent sandbox)
- You work in your own clone of each repo under `/srv/git/<repo>`; the owner's
canonical repo lives in their home, which you cannot reach.
- Deliver work as commits in your clone — the owner reviews by fetching from
it, so uncommitted work is invisible to them.
- Never push to origin or any external remote, and never sign commits; the
owner squashes and signs what lands. Full workflow: `profiles/sandbox.nix`.
## Conventions
- Nix code: format with `nixfmt`. Profiles stay username-agnostic — per-user
configuration goes in `machines/*/default.nix`.
- Never run `nixos-rebuild` or otherwise apply system configuration; propose
changes as commits and let the owner apply them.
### Git
- Always work on a branch, never commit directly to `main`. Committing to
`main` lets it diverge from `origin/main` and turns the next pull into a
rebase-conflict mess; a branch keeps `main` clean to fast-forward.
- Trailers: `Assisted-by: AGENT_NAME:MODEL_VERSION`.
- AGENT_NAME is the name of the AI harness, tool, or framework
- If unsure, default to `unknown`
- MODEL_VERSION is the specific model used
- If unsure, default to `unknown`
- Do NOT use `Co-authored-by`.
- Commit subjects: `area: imperative summary` (e.g. `profiles: extract shared
sandbox profile`); the body explains why, not what.
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