Work With PR — Full PR Lifecycle

2. Create branch

If user provides a branch name, use it. Otherwise, derive from the task:

# Auto-generate: feature/short-description or fix/short-description
BRANCH_NAME="feature/$(echo "$TASK_SUMMARY" | tr '[:upper:] ' '[:lower:]-' | head -c 50)"
git fetch origin "$BASE_BRANCH"
git branch "$BRANCH_NAME" "origin/$BASE_BRANCH"

3. Create worktree

Place worktrees as siblings to the repo — not inside it. This avoids git nested repo issues and keeps the working tree clean.

WORKTREE_PATH="../${REPO_NAME}-wt/${BRANCH_NAME}"
mkdir -p "$(dirname "$WORKTREE_PATH")"
git worktree add "$WORKTREE_PATH" "$BRANCH_NAME"

4. Set working context

All subsequent work happens inside the worktree. Install dependencies if needed:

cd "$WORKTREE_PATH"
# If bun project:
[ -f "bun.lock" ] && bun install

Phase 1: Implement

Do the actual implementation work inside the worktree. The agent using this skill does the work directly — no subagent delegation for the implementation itself.

Scope discipline: For bug fixes, stay minimal. Fix the bug, add a test for it, done. Do not refactor surrounding code, add config options, or "improve" things that aren't broken. The verification loop will catch regressions — trust the process.

Commit strategy

Use the git-master skill's atomic commit principles. The reason for atomic commits: if CI fails on one change, you can isolate and fix it without unwinding everything.

3+ files changed  → 2+ commits minimum
5+ files changed  → 3+ commits minimum
10+ files changed → 5+ commits minimum

Each commit should pair implementation with its tests. Load git-master skill when committing:

task(category="quick", load_skills=["git-master"], prompt="Commit the changes atomically following git-master conventions. Repository is at {WORKTREE_PATH}.")

Pre-push local validation

Before pushing, run the same checks CI will run. Catching failures locally saves a full CI round-trip (~3-5 min):

bun run typecheck
bun test
bun run build

Fix any failures before pushing. Each fix-commit cycle should be atomic.

Phase 2: PR Creation

<pr_creation>

Push and create PR

git push -u origin "$BRANCH_NAME"

Create the PR using the project's template structure:

gh pr create \
  --base "$BASE_BRANCH" \
  --head "$BRANCH_NAME" \
  --title "$PR_TITLE" \
  --body "$(cat <<'EOF'
## Summary
[1-3 sentences describing what this PR does and why]

## Changes
[Bullet list of key changes]

## Testing
- `bun run typecheck` ✅
- `bun test` ✅
- `bun run build` ✅

## Related Issues
[Link to issue if applicable]
EOF
)"

Capture the PR number:

PR_NUMBER=$(gh pr view --json number -q .number)

</pr_creation>

Phase 3: Verification Loop

This is the core of the skill. Three gates must ALL pass for the PR to be ready. The loop has no iteration cap — keep going until done. Gate ordering is intentional: CI is cheapest/fastest, review-work is most thorough, Cubic is external and asynchronous.

<verify_loop>

while true:
  1. Wait for CI          → Gate A
  2. If CI fails          → read logs, fix, commit, push, continue
  3. Run review-work      → Gate B
  4. If review fails      → fix blocking issues, commit, push, continue
  5. Check Cubic          → Gate C
  6. If Cubic has issues   → fix issues, commit, push, continue
  7. All three pass       → break

Gate A: CI Checks

CI is the fastest feedback loop. Wait for it to complete, then parse results.

# Wait for checks to start (GitHub needs a moment after push)
# Then watch for completion
gh pr checks "$PR_NUMBER" --watch --fail-fast

On failure: Get the failed run logs to understand what broke:

# Find the failed run
RUN_ID=$(gh run list --branch "$BRANCH_NAME" --status failure --json databaseId --jq '.[0].databaseId')

# Get failed job logs
gh run view "$RUN_ID" --log-failed

Read the logs, fix the issue, commit atomically, push, and re-enter the loop.

Gate B: review-work

The review-work skill launches 5 parallel sub-agents (goal verification, QA, code quality, security, context mining). All 5 must pass.

Invoke review-work after CI passes — there's no point reviewing code that doesn't build:

task(
  category="unspecified-high",
  load_skills=["review-work"],
  run_in_background=false,
  description="Post-implementation review of PR changes",
  prompt="Review the implementation work on branch {BRANCH_NAME}. The worktree is at {WORKTREE_PATH}. Goal: {ORIGINAL_GOAL}. Constraints: {CONSTRAINTS}. Run command: bun run dev (or as appropriate)."
)

On failure: review-work reports blocking issues with specific files and line numbers. Fix each blocking issue, commit, push, and re-enter the loop from Gate A (since code changed, CI must re-run).

Gate C: Cubic Approval

Cubic (cubic-dev-ai[bot]) is an automated review bot that comments on PRs. It does NOT use GitHub's APPROVED review state — instead it posts comments with issue counts and confidence scores.

Approval signal: The latest Cubic comment contains **No issues found** and confidence **5/5**.

Issue signal: The comment lists issues with file-level detail.

# Get the latest Cubic review
CUBIC_REVIEW=$(gh api "repos/${REPO}/pulls/${PR_NUMBER}/reviews" \
  --jq '[.[] | select(.user.login == "cubic-dev-ai[bot]")] | last | .body')

# Check if approved
if echo "$CUBIC_REVIEW" | grep -q "No issues found"; then
  echo "Cubic: APPROVED"
else
  echo "Cubic: ISSUES FOUND"
  echo "$CUBIC_REVIEW"
fi

On issues: Cubic's review body contains structured issue descriptions. Parse them, determine which are valid (some may be false positives), fix the valid ones, commit, push, re-enter from Gate A.

Cubic reviews are triggered automatically on PR updates. After pushing a fix, wait for the new review to appear before checking again. Use gh api polling with a conditional loop:

# Wait for new Cubic review after push
PUSH_TIME=$(date -u +%Y-%m-%dT%H:%M:%SZ)
while true; do
  LATEST_REVIEW_TIME=$(gh api "repos/${REPO}/pulls/${PR_NUMBER}/reviews" \
    --jq '[.[] | select(.user.login == "cubic-dev-ai[bot]")] | last | .submitted_at')
  if [[ "$LATEST_REVIEW_TIME" > "$PUSH_TIME" ]]; then
    break
  fi
  # Use gh api call itself as the delay mechanism — each call takes ~1-2s
  # For longer waits, use: timeout 30 gh pr checks "$PR_NUMBER" --watch 2>/dev/null || true
done

Iteration discipline

Each iteration through the loop:

1. Fix ONLY the issues identified by the failing gate
2. Commit atomically (one logical fix per commit)
3. Push
4. Re-enter from Gate A (code changed → full re-verification)

Avoid the temptation to "improve" unrelated code during fix iterations. Scope creep in the fix loop makes debugging harder and can introduce new failures.

</verify_loop>

Phase 4: Merge & Cleanup

Once all three gates pass:

<merge_cleanup>

Merge the PR

# Squash merge to keep history clean
gh pr merge "$PR_NUMBER" --squash --delete-branch

Sync .sisyphus state back to main repo

Before removing the worktree, copy .sisyphus/ state back. When .sisyphus/ is gitignored, files written there during worktree execution are not committed or merged — they would be lost on worktree removal.

# Sync .sisyphus state from worktree to main repo (preserves task state, plans, notepads)
if [ -d "$WORKTREE_PATH/.sisyphus" ]; then
  mkdir -p "$ORIGINAL_DIR/.sisyphus"
  cp -r "$WORKTREE_PATH/.sisyphus/"* "$ORIGINAL_DIR/.sisyphus/" 2>/dev/null || true
fi

Clean up the worktree

The worktree served its purpose — remove it to avoid disk bloat:

cd "$ORIGINAL_DIR"  # Return to original working directory
git worktree remove "$WORKTREE_PATH"
# Prune any stale worktree references
git worktree prune

Report completion

Summarize what happened:

## PR Merged ✅

- **PR**: #{PR_NUMBER} — {PR_TITLE}
- **Branch**: {BRANCH_NAME} → {BASE_BRANCH}
- **Iterations**: {N} verification loops
- **Gates passed**: CI ✅ | review-work ✅ | Cubic ✅
- **Worktree**: cleaned up

</merge_cleanup>

Failure Recovery

<failure_recovery>

If you hit an unrecoverable error (e.g., merge conflict with base branch, infrastructure failure):

1. Do NOT delete the worktree — the user may want to inspect or continue manually
2. Report what happened, what was attempted, and where things stand
3. Include the worktree path so the user can resume

For merge conflicts:

cd "$WORKTREE_PATH"
git fetch origin "$BASE_BRANCH"
git rebase "origin/$BASE_BRANCH"
# Resolve conflicts, then continue the loop

</failure_recovery>

Anti-Patterns