cast/CONTRIBUTING.md

# Contributing

How change lands in this repo. The short version: PRs are born as drafts,
three reviewer bots take the first rounds, a human takes the last word — and
labels tell you where everything is without opening anything.

## The PR loop

1. **Fork and branch.** Contributors work from forks; upstream branches are
   for maintainers. Title the PR conventionally (`feat:`, `fix:`, `docs:`).
2. **Open as a draft** while you build. Drafts are invisible to the reviewer
   bots on purpose.
3. **When it's ready**: mark ready-for-review and request all three bots —
   `claude-bot-andresmgsl`, `codex-bot-andresmgsl`, `grok-bot-andresmgsl`.
   They poll roughly every 15 minutes.
4. **Rounds are answered whole.** Wait until all three have reviewed, then
   answer the entire round in a **single reply**, push the fixes, and
   re-request the bots that didn't approve. Prefer verification over
   argument: a test settles what a comment thread can't.
5. **Reviews end in a verdict.** A reviewer — bot or human — either
   **approves** or **requests changes**, never a bare comment. A
   comment-only review is a non-verdict: it doesn't say whether the round
   passed, and the state machine (and anyone scanning the board) has to
   guess. The verdict carries *blockingness only*, the body carries the
   feedback: non-blocking nits ride an **approval** and the author addresses
   them at their discretion; anything blocking — including a question that
   gates the verdict — is **request changes**, saying what unblocks it. The
   reconciler treats a comment-only review as not-approved, so commenting
   without a verdict only stalls the PR.
6. **When all three approve**, the final review goes to the maintainer — the
   labels workflow requests it automatically.
7. **Checks must be green**: `npm run check`, `npm run build`, and
   `npm test` locally mirror what CI runs.

## Labels — who sets what

The full taxonomy lives in [LABELS.md](LABELS.md). What matters day to day is
who sets each kind — most of it is machinery, and hand-moving a
machine-owned label just gets corrected on the next pass:

| Labels | Set by |
|---|---|
| `state:*` | the labels workflow ([.github/workflows/labels.yml](.github/workflows/labels.yml)) — recomputed from GitHub's own facts every 15 minutes and on PR events. Never by hand. |
| `stale` | the same workflow — 48h without commits, comments, or reviews. `blocked` PRs are exempt: they are quiet legitimately. |
| `scope:*` on PRs | actions/labeler, from the changed paths ([.github/labeler.yml](.github/labeler.yml)). Additive — you may add more, the machine won't remove them. |
| `scope:*` on issues | you, when opening or triaging — issues have no paths to derive from. |
| `blocked`, `release` | you — automation never guesses intent. |
| `bug` / `enhancement` / `documentation` | you, on issues only — a PR's type already lives in its title. |

## Issues

Give issues the same care as PR titles: say the surface in the title, apply a
`scope:` label and a type label (`bug` / `enhancement` / `documentation`) when
you open one, and `blocked` when it waits on something — that is what keeps
the board navigable as the issue count grows.