babysit-pr

name	babysit-pr
description	Babysits a GitHub pull request by continuously polling CI checks, review comments, and mergeability state until the PR is ready to merge or closed. Diagnoses failures, retries flaky failures up to 3 times, auto-fixes branch-related issues, and stops only when user help is required. Use when asked to monitor a PR, watch CI, handle review comments, or track failures on an open PR.

PR Babysitter

Objective

Babysit a PR persistently until one of these terminal outcomes:

• PR is merged or closed.
• CI succeeded, no unaddressed review comments, not blocked on review approval, and mergeable.
• A situation requires user help (infra issues, exhausted flaky retries, permissions, or ambiguity).

Do not stop merely because a single snapshot returns idle while checks are still pending.

Inputs

• No PR argument: infer from the current branch (--pr auto)
• PR number or PR URL

Commands

# One-shot snapshot
python3 scripts/gh_pr_watch.py --pr auto --once

# Continuous watch (JSONL)
python3 scripts/gh_pr_watch.py --pr auto --watch

# Trigger flaky retry cycle
python3 scripts/gh_pr_watch.py --pr auto --retry-failed-now

# Explicit PR target
python3 scripts/gh_pr_watch.py --pr <number-or-url> --once

Core Workflow

1. Start with --watch for monitoring requests; use --once only for one-shot diagnostics.
2. Inspect actions in the JSON response and act accordingly:
   • diagnose_ci_failure → inspect logs, classify as branch-related or flaky.
   • process_review_comment → address actionable feedback, commit and push.
   • retry_failed_checks → rerun flaky jobs (prioritize review fixes first).
3. After any push or rerun, immediately resume polling on the updated SHA.
4. Repeat until a stop condition is met.

For detailed workflow steps, CI classification, review handling, git safety rules, polling cadence, and output expectations, see references/workflow.md.

Stop Conditions

Stop only when:

• PR merged or closed.
• PR is ready: CI green, no unaddressed reviews, mergeable, not blocked on approval.
• User intervention required and cannot safely proceed alone.

Keep polling when:

• Checks are still pending or running.
• CI is green but mergeability is unknown/pending.
• CI is green but blocked on review approval — continue on green-state cadence.

Final Summary

Include: final PR SHA, CI status, mergeability, fixes pushed, flaky retry cycles used, remaining unresolved items.

References

• Detailed workflow and patterns: references/workflow.md
• Heuristics and decision tree: references/heuristics.md
• GitHub CLI/API details: references/github-api-notes.md