Babysitting PRs

Drive a branch or GitHub pull request to the end state the user requested: published, updated, merge-ready, or merged.

Authorization And Scope

• Inspecting local or PR state is read-only. A request to publish, update, address feedback, prepare, land, or merge authorizes the corresponding branch and PR writes; preserve unrelated work and avoid rewriting remote history unless explicitly authorized.
• Merge only when the user explicitly asks to merge, land, ship, queue, or get the PR merged. “Prepare to land,” “babysit,” “make mergeable,” and “ready for review” mean merge-ready only. Ambiguous follow-ups such as “looks good” do not grant new merge permission.
• Do not introduce GitHub Codex review. Continue it only when the PR already has Codex review activity or the user explicitly asks for it.

Companion Skills

• Use writing-pr-descriptions before creating a PR and after material changes to an existing PR.
• Use auto-review when the user asks for it or the diff is materially risky: behavior, public contracts, data, security, concurrency, migrations, or cross-cutting structure. For small docs, metadata, configuration, or mechanical changes, use focused inspection and risk-matched validation instead of a mandatory full review loop.
• Use handling-codex-reviews only for an already-active or explicitly requested Codex loop.

Workflow

Use a bounded loop, normally no more than three fix cycles. Batch related fixes before pushing.

1. Resolve the target and requested end state

- Read repository instructions, git status, branch, remotes, and existing PR metadata. - Identify the base and current head SHA. Preserve unrelated dirty files. - If no PR exists and publication is in scope, use the repository’s branch convention, commit only intended changes, and push the branch. Do not create a PR when the user asked only for local work.

1. Review and publish when needed

- Apply the risk rule above rather than running auto-review by rote. - Use writing-pr-descriptions against the final base-to-head diff and applicable template, then create or update a non-draft PR unless the user requested a draft. - Re-fetch the PR number, URL, head SHA, and merge state after publishing.

1. Read current PR state

- Run scripts/pr_babysit.sh status --pr <pr> --repo <owner/repo>. - Treat unresolved review threads as the source of truth for inline feedback. Include submitted top-level reviews, but ignore withdrawn, pending, already acknowledged, or stale feedback that no longer applies to the current diff.

1. Clear branch and review blockers

- Rebase or merge the base according to repository convention and resolve conflicts with the smallest correct change. - Classify feedback as actionable, already addressed, inaccurate, or requiring user judgement. Fix grounded items in one batch and run focused validation. - Commit and push before replying. Reply inline with Fixed in <sha>: <what changed>; for top-level reviews include the review ID so later runs can correlate it. - Add reactions only when they accurately acknowledge the feedback. Resolve a thread only after the pushed fix and reply are visible, then re-query unresolved threads. - Do not amend a commit after publishing replies that cite its SHA. Re-request only reviewers already participating, using their established mechanism; do not substitute or introduce a different bot.

1. Handle Codex only when present

- If status reports existing Codex activity, pending review, actionable Codex feedback, or active eyes, use handling-codex-reviews. - If Codex is unavailable, continue with non-Codex blockers. Do not post another trigger or block on approval unless completing Codex review was explicitly requested.

1. Clear CI blockers

- Run scripts/pr_babysit.sh checks --pr <pr> --repo <owner/repo> and inspect failures through GitHub first. - Use Buildkite-specific tools only when the PR has Buildkite checks and linked GitHub output is insufficient. Missing Buildkite access blocks only that diagnosis. - Fix branch-caused failures and retry one evidenced flaky or external failure once. Stop after two serious attempts at the same branch-caused failure.

1. Refresh metadata and finish

- If code, behavior, scope, or evidence changed materially, run writing-pr-descriptions against the final head. - Before merge or handoff, re-fetch head SHA, reviews, unresolved threads, checks, and merge state. Never merge a head different from the reviewed green head. - Use the repository’s merge queue, auto-merge, or normal merge method. Delete the branch only when requested or established repository configuration does so.

Helper Commands

scripts/pr_babysit.sh status --pr 32 --repo owner/repo
scripts/pr_babysit.sh resolve --pr 32 --repo owner/repo --comment-ids 12345,67890
scripts/pr_babysit.sh checks --pr 32 --repo owner/repo

The status result includes mergeblockers, readyto_merge, unresolved review threads, check state, and Codex state. It is a fast summary, not a substitute for judgement.

Stop And Report

Stop for missing authorization, contradictory feedback, required human or product judgement, unavailable essential credentials, branch protection, or a repeated blocker that evidence-based fixes did not clear.

Report the achieved state, PR URL, and exact blocker when unfinished. Mention commits or validation only when they materially help the handoff.