Add /merge-green-prs skill

.claude/skills/merge-green-prs/SKILL.md

@@ -0,0 +1,33 @@
+---
+name: merge-green-prs
+description: Check this repo's open pull requests and merge the ones from claude/* branches whose tests have passed. Use when asked to merge green PRs, watch PRs, or clear the PR queue. Never merges a PR from any other branch.
+---
+
+# Merge green PRs
+
+Repo: the current repository (`owner/repo` from the git remote). Use the GitHub MCP tools (`mcp__github__*`), never `gh`.
+
+## Which PRs are eligible
+A PR is merged only if ALL of these hold; otherwise report it and leave it alone:
+1. Open and not a draft.
+2. Head branch starts with `claude/` and lives in this same repo (not a fork).
+3. Base branch is the default branch.
+4. `mergeable_state` is `clean` (not `blocked`, `behind`, `dirty`, `unstable`, `draft`, `unknown`).
+5. Its check runs (`get_check_runs`) exist, are all `completed`, and every one has conclusion `success`.
+6. No review with `CHANGES_REQUESTED` (`get_reviews`) and no unresolved review thread (`get_review_comments`).
+
+## Steps
+1. `list_pull_requests` (state `open`). Skip, with the reason, everything that fails 1-3.
+2. For each remaining PR, read it fresh from GitHub: `pull_request_read` `get`, `get_check_runs`, `get_reviews`,
+   `get_review_comments`. Never rely on earlier results or memory for a PR's state.
+3. Checks still `queued` or `in_progress` -> "waiting", do nothing. Any failure -> "red", say which check, do not merge.
+   `behind` or conflicted -> report; do not update the branch or merge without being asked.
+4. Eligible -> `merge_pull_request` with `merge_method: merge` and `expectedHeadSha` set to the head SHA you just read
+   (so a push that lands in between aborts the merge).
+5. Read the PR back from GitHub and confirm `merged: true`. If the session was subscribed to it, unsubscribe.
+6. Finish with one table: PR number and title, outcome (merged / waiting / red / blocked / skipped), and the reason.
+
+## Never
+- Merge a PR from a branch that doesn't start with `claude/`, a fork, a draft, or one with a failing, missing or pending check.
+- Skip, disable or re-run tests to get green; push to a PR's branch; force-push; approve reviews; close PRs; delete branches.
+- State a PR's status without reading it from GitHub in this run.

CLAUDE.md

@@ -7,6 +7,7 @@ MCP data tools and web search. User-facing docs are in `README.md`; this file is
 - `make check`: ruff + pytest (no network, a few seconds). Run it before every commit, on Python 3.13.5 (production;
   `uv venv --python 3.13.5`). GitHub CI runs the latest stable Python and Node.js instead, to catch breakage from the next upgrade early.
 - `make prompt-report`: token breakdown of a sample request. `python bot.py [label]` runs the bot.
+- `/merge-green-prs` (`.claude/skills/merge-green-prs/SKILL.md`): check open PRs and merge the green ones from `claude/*` branches.
 - Tests use fakes (`tests/conftest.py`: FakeBot, user_msg; `tests/fakes.py`: ScriptedBackend,
   FakeMcp, fake SDK clients; `tests/fixtures/` real anonymised MCP output). Add a test next to the module you change;
   don't write scratch scripts.