AGENTS.md git:20261013.857bb1bA

Immutable. This exact content never changes and is served at /api/v1/blob/ac56f8268781f1b5.

# celis trails — repo conventions

## Layout

- `crates/` is one Cargo workspace. Run cargo from there.
- `spec/trails/` holds the contract, as CIPs. `spec/fixtures/` holds what two ends must match.
- `plugins/celis/` is the plugin: one manifest per agent, and the same hooks. Gemini CLI installs from the
  repo root, so `gemini-extension.json` and `hooks/` are there. The card's command lines match the usage
  in `crates/celis/src/help.rs`; `crates/celis/tests/help.rs` checks it.

## Writing

- Say it once, in the fewest words that keep the meaning. Short sentences, never fragments.
- A name is a noun for what a thing is. No `-er`/`-or` agent names (`Manager`, `Handler`).
- One primary type per file; the filename matches it.

## Docstrings

- On types and members only. No inline comments.
- A docstring states what the item does, not how or why. Five lines on a type, three on a member, none
  where the name says it.
- A test cites the spec section it proves: ``(`spec/trails/12-steps.md`, "Section")``.

## Tests

- Unit tests go in a sibling `tests.rs` (`foo.rs` → `foo/tests.rs`).
- A test proves behaviour through the public surface. Fakes stand in only at I/O.

## Verify

```bash
make verify   # fmt, clippy -D warnings, and the tests
```

A CLI release is a `cli-v<version>` tag. The repo keeps `crates/celis` and `plugin.json` at `0.0.0`; the
release passes the version in through `CELIS_VERSION`.