watch-pr

name	watch-pr
description	Monitor a PR's CI checks and Greptile code review after submission. Polls CI status, auto-fixes failures via ralph-loop, waits for Greptile review, addresses comments, and iterates until green.
allowed-tools	Read, Grep, Glob, Bash, Edit, Write, Skill

/watch-pr

Monitor a submitted PR until CI passes and code reviews are addressed.

EXECUTE THESE STEPS NOW

When this skill is invoked, you MUST execute these steps immediately. Do NOT just describe what will happen — actually do it.

Step 0: Resolve PR Number and Repo

Extract the PR number from $ARGUMENTS. If no argument was provided, detect from the current branch:

gh pr view --json number -q '.number'

If no PR is found, stop with: "No PR found for current branch. Create one with gh pr create or pass a PR number: /watch-pr 123"

Also resolve the repo identifier:

gh repo view --json nameWithOwner -q '.nameWithOwner'

Store as PR_NUMBER and REPO. Initialize counters:

• CI_FIX_COUNT = 0 (max 5)
• REVIEW_FIX_COUNT = 0 (max 3)

Report to the user:

## Watching PR #<PR_NUMBER>
Monitoring CI and reviews for https://github.com/<REPO>/pull/<PR_NUMBER>

---

Step 1: WAITING_CI — Poll CI Checks

Run the CI polling script with a 30-minute timeout:

bash .claude/hooks/ci-wait.sh <PR_NUMBER> 1800

Important: Set the Bash tool timeout to 600000ms (10 minutes). If the script exceeds this, re-invoke it with the remaining timeout: bash .claude/hooks/ci-wait.sh <PR_NUMBER> <REMAINING_SECONDS>.

Evaluate the exit code:

• Exit 0 (all checks passed): Go to Step 3 (WAITING_REVIEW).
• Exit 1 (checks failed): Go to Step 2 (CI_FAILED).
• Exit 2 (timeout): Report to user: "CI checks did not complete within 30 minutes. Check manually." Stop.
• Exit 3 (error): Report error and stop.

---

Step 2: CI_FAILED — Fix and Retry

Increment CI_FIX_COUNT. If CI_FIX_COUNT > 5, stop with:

CI has failed 5 times. Manual intervention required.
PR: https://github.com/<REPO>/pull/<PR_NUMBER>

2a. Identify failed checks and get logs:

# Get the head SHA for this PR
HEAD_SHA=$(gh pr view <PR_NUMBER> --json headRefOid -q '.headRefOid')

# List failed workflow runs for this commit
gh run list --commit "$HEAD_SHA" --json databaseId,name,conclusion --jq '.[] | select(.conclusion == "failure")'

For each failed run, fetch the failure logs:

gh run view <RUN_ID> --log-failed 2>&1 | tail -200

2b. Try ralph-loop first:

Invoke the ralph-loop plugin to fix the failures:

Skill tool: skill: "ralph-loop"

If ralph-loop successfully fixes the issues (tests pass locally), commit and push the changes, then go to Step 1.

2c. Fallback to inline fix (if ralph-loop unavailable or fails):

1. Read the failure logs from step 2a
2. Identify the root cause (test failure, lint error, build error, etc.)
3. Read the relevant source files
4. Fix the code
5. Verify locally:

   bash .claude/hooks/lint.sh && bash .claude/hooks/test.sh
   

6. Stage, commit, and push:

   git add <specific-files>
   git commit -m "fix: address CI failure (<brief description>)"
   git push
   

2d. Return to Step 1 (WAITING_CI).

After pushing the fix, CI will re-run. Go back to Step 1.

---

Step 3: WAITING_REVIEW — Poll for Greptile Review

All CI checks have passed. Now wait for Greptile's code review.

Poll every 120 seconds for up to 3 hours (max 90 polls). On each poll:

# Check for reviews from greptile-apps[bot]
REVIEW_COUNT=$(gh api repos/<REPO>/pulls/<PR_NUMBER>/reviews \
  --jq '[.[] | select(.user.login == "greptile-apps[bot]")] | length')

# Check for line-level comments from greptile-apps[bot]
COMMENT_COUNT=$(gh api repos/<REPO>/pulls/<PR_NUMBER>/comments \
  --jq '[.[] | select(.user.login == "greptile-apps[bot]")] | length')

Decision logic:

• If both counts are 0: print "Waiting for Greptile review... (poll N/90)", sleep 120 seconds, and poll again.
• If 3-hour timeout reached with no review: go to Step 5 (DONE) with note "Greptile review did not arrive within 3 hours."
• If review exists, check if actionable:
  • Actionable (go to Step 4): The latest review state is CHANGES_REQUESTED, OR there are line-level comments from greptile-apps[bot].
  • Not actionable (go to Step 5): Review state is APPROVED or COMMENTED with no line-level comments.

To check review state:

gh api repos/<REPO>/pulls/<PR_NUMBER>/reviews \
  --jq '[.[] | select(.user.login == "greptile-apps[bot]")] | last | .state'

---

Step 4: REVIEW_RECEIVED — Address Greptile Comments

Increment REVIEW_FIX_COUNT. If REVIEW_FIX_COUNT > 3, stop with:

Greptile has requested changes 3 times. Manual intervention required.
PR: https://github.com/<REPO>/pull/<PR_NUMBER>

4a. Fetch the review body:

gh api repos/<REPO>/pulls/<PR_NUMBER>/reviews \
  --jq '[.[] | select(.user.login == "greptile-apps[bot]")] | last | .body'

4b. Fetch all line-level comments:

gh api repos/<REPO>/pulls/<PR_NUMBER>/comments \
  --jq '[.[] | select(.user.login == "greptile-apps[bot]")] | .[] | {id: .id, path: .path, line: .line, body: .body}'

4c. Address each comment:

For each line-level comment:

1. Read the file at the specified path and line
2. Understand the suggestion
3. If it aligns with project principles: apply the fix
4. If it conflicts with .claude/docs/PRINCIPLES.md or .claude/docs/INVARIANTS.md: do NOT apply it. Reply explaining why:

   gh api repos/<REPO>/pulls/<PR_NUMBER>/comments/<COMMENT_ID>/replies \
     -f body="Not applied: <reason based on project principles>"
   

5. For applied fixes, reply to acknowledge:

   gh api repos/<REPO>/pulls/<PR_NUMBER>/comments/<COMMENT_ID>/replies \
     -f body="Fixed in latest push."
   

4d. Human approval checkpoint:

Before committing review fixes, present a summary to the user for approval:

## Greptile Review Changes Summary

| # | Comment | Action | File |
|---|---------|--------|------|
| 1 | <brief description> | Applied / Declined | <path> |
| 2 | ... | ... | ... |

Approve these changes before pushing? (y/n)

Use the AskUserQuestion tool to get explicit approval. If the user declines, stop and let them handle the review manually.

4e. Verify, commit, and push:

After user approval:

bash .claude/hooks/lint.sh && bash .claude/hooks/test.sh

If local checks pass:

git add <specific-files>
git commit -m "fix: address Greptile review comments"
git push

4f. Return to Step 1 (WAITING_CI).

CI will re-run after the push. Go back to Step 1.

---

Step 5: DONE — Final Report

## Watch PR Complete

### PR
https://github.com/<REPO>/pull/<PR_NUMBER>

### CI Status: PASSED
- CI fix iterations: <CI_FIX_COUNT>

### Greptile Review
| Status | Details |
|--------|---------|
| Received | YES / NO (timed out) |
| Actionable comments | N |
| Comments addressed | N |
| Comments declined | N (with reasons) |
| Review fix iterations | <REVIEW_FIX_COUNT> |

### Final Status: READY FOR HUMAN REVIEW / NEEDS ATTENTION

If final status is READY (CI green, reviews addressed), report:

PR is ready for human review.

If final status is NEEDS ATTENTION (hit iteration limits), explain what remains.

---

Safeguards

Limit	Value	Behavior when exceeded
CI fix iterations	5	Stop, report failures, ask user
Greptile wait timeout	3 hours	Continue without review
Review fix iterations	3	Stop, report outstanding comments

When to Use

• After /pre-submit-pr creates and pushes a PR
• After pushing fixes to an existing PR
• When you want automated CI monitoring and review handling

When NOT to Use

• Before a PR exists (run /pre-submit-pr first)
• For draft PRs that aren't ready for review
• When you want manual control over CI fixes

Workflow Integration

/work-on-issue #42  →  Start from GitHub issue
    ↓
/write-tests        →  Create failing tests (Red)
    ↓
/implement          →  Make tests pass (Green)
    ↓
/update-docs        →  Fix stale docs across repo
    ↓
/simplify           →  Refactor (optional)
    ↓
/pre-submit-pr      →  Validate before PR
    ↓
/watch-pr           →  Monitor CI + Greptile review  ← THIS SKILL