CONTRIBUTING keeps only what is genuinely cast's — the panel roster, the
local checks, the changelog house style, the prebuilt-asset contract and
the promotion drill meaning; the review-round doctrine and label taxonomy
now live in .ceremony/. drills/README.md and labeler.yml repoint at the
pinned guard and the vendored LABELS.md (the sweep rule from ceremony#12,
learned in rig#112).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The machinery LABELS.md promised. labels.yml runs the reconciler on a
15-minute cron plus PR events (pull_request_target — every PR here is from a
fork, where pull_request gets a read-only token; no PR code is ever checked
out). The script derives each open PR's state:* from GitHub's own facts and
converges labels statelessly; stale is judged from real activity (commits,
comments, reviews), never label churn, so the sweep cannot un-stale its own
mark. actions/labeler applies scope:* from changed paths. CONTRIBUTING.md is
the guideline: the PR loop, and who sets which labels. Rehearsed with
DRY_RUN=1 against the live repo; shellcheck-clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
