Gh Dev

GitHub Issue Development

Pick up the next issue, assess it, and either complete it or document blockers. Works with any GitHub repository with worktree isolation.

Arguments: $ARGUMENTS (optional: issue number to work on specific issue)

Repository Detection

REPO=$(gh repo view --json nameWithOwner -q .nameWithOwner 2>/dev/null)
REPO_NAME=$(gh repo view --json name -q .name 2>/dev/null)
if [ -z "$REPO" ]; then
  echo "Not in a GitHub repository."
  exit 1
fi

Issue Selection (Label-Free Fallback)

Priority order:

1. If ready label exists in repo → use labeled issues
2. If no ready label → fall back to lowest open issue number

# Check if ready label exists
HAS_READY=$(gh label list --json name -q '.[].name' | grep -q "^ready$" && echo "yes" || echo "no")

if [ "$HAS_READY" = "yes" ]; then
  gh issue list --label ready --state open --json number,title,labels
else
  gh issue list --state open --json number,title,labels | jq 'sort_by(.number) | .[0:5]'
fi

Issue Locking

If in-progress label exists: Use it for locking (prevents parallel agents on same issue).

# Claim
gh issue edit <N> --add-label "in-progress"

# Release
gh issue edit <N> --remove-label "in-progress"

If no in-progress label: Skip locking (single-agent mode).

Worktree Requirement

MANDATORY: Always create a worktree for issue work. Never work directly on main.

BASE_BRANCH=$(git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@')
git worktree add .worktree/${REPO_NAME}-issue-<N> -b <type>/<N>-<desc> origin/${BASE_BRANCH}
WORKTREE_DIR="$(pwd)/.worktree/${REPO_NAME}-issue-<N>"

Use WORKTREE_DIR variable and subshells (cd "$WORKTREE_DIR" && ...) for all worktree commands.

Branch Checkout Rules

NEVER in main directory:

git checkout <branch>      # Changes branch for ALL agents
git switch <branch>        # Same problem

ALWAYS use worktrees:

git worktree add .worktree/${REPO_NAME}-issue-<N> -b <type>/<N>-<desc>

Decision Flow

START
  │
  ├─ Argument provided? ──yes──▶ Work on issue #$ARGUMENTS
  │                              Skip to PHASE 2
  │
  ├─ In worktree? ──yes──▶ Extract issue # from branch
  │                        Skip to PHASE 2
  │
  └─ In main directory ──▶ PHASE 1: Find next issue
                                │
                                ▼
                           PHASE 2: Assess & Claim
                                │
                    ┌───────────┴───────────┐
                    ▼                       ▼
              Simple                   Complex
              (≤3 files)              (>3 files)
                    │                      │
                    │              Use Plan agent
                    │                      │
                    └──────────┬───────────┘
                               ▼
                    Create worktree (MANDATORY)
                               │
                               ▼
                         PHASE 3: Implement
                               │
                               ▼
                         Run verification
                               │
                               ▼
                    ┌──── /code-review ◀────────┐
                    │          │                │
                    │    Findings?              │
                    │     yes      no           │
                    │      │       │            │
                    │      ▼       ▼            │
                    │   Fix all  Commit ────────┘
                    │   findings   │
                    │      │       ▼
                    └──────┘   Push (pre-push
                               CodeRabbit --agent
                               gate; --no-verify
                               only if transient)
                                   │
                                   ▼
                               Create PR
                                   │
                    ┌──────────┴──────────┐
                    ▼                     ▼
                 Success              Blocked
                    │                     │
                    ▼                     ▼
              Merge               Release lock
              Cleanup              WIP commit
                    │              Comment on issue
                    ▼                     │
              PHASE 4:                    ▼
              More issues?              STOP

Phase 1: Pre-flight

Skip if argument provided or already in worktree.

1a. Main Branch Verification

CURRENT=$(git branch --show-current)
if [ "$CURRENT" != "main" ] && [ "$CURRENT" != "master" ]; then
  echo "ABORT: Shared checkout is on '$CURRENT', not main/master."
  echo "Do NOT switch branches here; other worktrees/agents may depend on it."
  echo "Restore it manually, then re-run."
  exit 1
fi

1b. Worktree Detection

git worktree list

Extract claimed issue numbers from branch names.

1c. Issue Fetch

Using label-free fallback logic above. Exclude worktree-claimed issues.

Phase 2: Issue Assessment

2a. Claim Issue

# If in-progress label exists
gh issue edit <N> --add-label "in-progress"
sleep 2
gh issue view <N> --json number,title,body,labels,assignees

Abort conditions: Assignee added, conflicting comment, ready label removed.

2b. Complexity Assessment

Simple: Proceed to Phase 3. Complex: Use Plan agent first.

Phase 3: Implementation

3a. Create Worktree

git fetch origin main || git fetch origin master
BASE_BRANCH=$(git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@')
git worktree add .worktree/${REPO_NAME}-issue-<N> -b <type>/<N>-<desc> origin/${BASE_BRANCH}
WORKTREE_DIR="$(pwd)/.worktree/${REPO_NAME}-issue-<N>"

3b. Implement

Work on the issue. Follow acceptance criteria.

3c. Verification (if configured)

Check CLAUDE.md for ### Verification Commands. If found, run them:

(cd "$WORKTREE_DIR" && <commands from CLAUDE.md>)

If not configured, skip or ask user.

3d. Local Code Review (before PR)

MANDATORY before opening a PR. Review the diff and resolve findings before pushing.

Do NOT run the CodeRabbit CLI here. Repos that gate on CodeRabbit run it at push time via a pre-push hook in agent mode (see 3f). Running it manually first doubles the work.

┌─────────────────────────────────────────┐
│            CODE REVIEW LOOP             │
├─────────────────────────────────────────┤
│                                         │
│  1. Run /code-review (or fallback)      │
│         │                               │
│         ▼                               │
│  2. Findings? ──no──▶ Proceed to commit │
│         │                               │
│        yes                              │
│         ▼                               │
│  3. Fix each finding                    │
│         │                               │
│         ▼                               │
│  4. Re-run verification commands        │
│         │                               │
│         └────────▶ Back to step 1       │
│                                         │
└─────────────────────────────────────────┘

Step 1: Run the review (auto-detect)

• Preferred: if a /code-review command is available in this environment, use it. It reviews the current diff for correctness bugs plus reuse/simplification/efficiency cleanups.
• Fallback: if /code-review is unavailable, use the repo's configured reviewer (check CLAUDE.md ### Review Command). If none, self-review the diff against the issue's acceptance criteria.

Step 2: Fix findings

Address each finding. For multiple findings, track them as tasks and mark completed as you go.

Step 3: Re-verify

After fixing, re-run verification commands (lint, test, build), then re-review. Only proceed when the review is clean.

Exit Conditions:

• Success: review returns no findings → proceed to commit
• Max iterations (3): if findings persist after 3 cycles, ask the user whether to proceed or abort

3e. Commit

(cd "$WORKTREE_DIR" && git add -A && git commit -m "<type>: <desc>

Fixes #<N>")

3f. Push (mind the pre-push gate)

(cd "$WORKTREE_DIR" && git push -u origin <branch>)

Some repos run a pre-push hook that gates the push on a CodeRabbit review. Detect a CodeRabbit gate specifically (not just any pre-push hook):

HOOK_FILE=""
[ -f .husky/pre-push ] && HOOK_FILE=".husky/pre-push"
[ -f .git/hooks/pre-push ] && HOOK_FILE=".git/hooks/pre-push"
if [ -n "$HOOK_FILE" ] && grep -qi "coderabbit" "$HOOK_FILE"; then
  echo "CodeRabbit pre-push gate detected"
fi

When present, the hook runs CodeRabbit in agent mode (coderabbit review --agent, default-deny) and blocks the push on real findings. The --no-verify fallback below applies only to a CodeRabbit gate. If a hook runs other checks (tests, lint), do not bypass them blindly.

If the push is blocked, classify the cause:

Only use --no-verify for transient/infrastructure failures. Never bypass to skip real findings.

3g. Create PR

(cd "$WORKTREE_DIR" && gh pr create \
  --title "<type>: <description> (#<N>)" \
  --body "## Summary
<bullets>

## Test Plan
- [ ] <verification>

Closes #<N>")

3h. Merge

gh pr checks <PR> --watch
gh pr merge <PR> --squash --delete-branch --auto

3i. Cleanup

# Release lock if label exists
gh issue edit <N> --remove-label "in-progress" 2>/dev/null || true

# Refresh main (shared checkout is already on main) and clean worktree
git pull
git worktree remove .worktree/${REPO_NAME}-issue-<N>
git worktree prune

Phase 4: Continue or Stop

Check for more issues:

# Re-run issue fetch logic

Continue if: More issues AND autonomous mode. Stop if: No issues, blocker hit, or user interruption.

Blocker Handling

1. Commit WIP: git commit -m "wip: partial #<N>" --no-verify && git push --no-verify (parking incomplete work; the review gate would block it)
2. Release lock: gh issue edit <N> --remove-label "in-progress"
3. Comment on issue with status, blocker, what was attempted
4. Stop

CLAUDE.md Overrides

If project has ## GitHub Workflow section, read for:

Verification Commands

### Verification Commands

```bash
npm run lint
npm run test:run
npm run build
```

Branch Prefixes

### Branch Prefixes

- Bug: fix/
- Feature: feat/
- Chore: chore/

Worktree Pattern

### Worktree Pattern

.worktree/<custom>-issue-<N>

Review Command

Used by step 3d when /code-review is unavailable in the environment.

### Review Command

```bash
<repo-specific local review command>
```

Output Format

After Each Issue

## Issue #<N>: <title>

**Status:** Completed | Blocked **Branch:** `<branch>` **PR:** <url>

**Summary:** <what was done>

**Files Changed:**

- `file.ts`: <change>

Session End

## Session Summary

**Completed:** N issues **Blocked:** M issues

**Completed:**

1. #42: Title - PR #123

**Blocked:**

1. #44: Title - <reason>