name: worktree-operations description: Guide for working within git worktrees in the tennis-team monorepo. Use this skill when you detect you're working in a worktree (path contains "claude-worktrees" or is outside the main project directory), when asked to "set up worktree", "install dependencies in worktree", "build in worktree", "merge worktree", or when troubleshooting worktree-specific issues. Covers Docker infrastructure, PostgreSQL/Redis setup, pnpm/turbo commands, environment setup, git workflows (merging, conflict resolution, cleanup), and common worktree pitfalls.

Worktree Operations

Detecting a Worktree

You're in a worktree if:

Path contains claude-worktrees (e.g., ~/claude-worktrees/tennis-team/my-feature-123456)
Path is outside the main project directory but contains project files
Branch name starts with worktree/

Worktrees are isolated checkouts used for parallel development without affecting the main checkout.

Initial Setup (After Worktree Creation)

When a worktree is first created, run these commands:

# Install dependencies with pnpm (runs automatically via worktree creation script)
pnpm install

# Start Docker infrastructure (PostgreSQL + Redis)
pnpm docker:infra

# Run database migrations
pnpm --filter @tennis/backend run db:migrate

Tennis-Team Project Structure

tennis-team/
├── apps/
│   ├── backend/          # Express API server (@tennis/backend)
│   ├── frontend/         # React frontend app (@tennis/frontend)
│   └── website/          # Public website (@tennis/website)
├── packages/
│   └── shared/           # Shared types and utilities (@tennis/shared)
├── docker/
│   ├── docker-compose.yml        # Infrastructure services
│   └── docker-compose.dev.yml    # Dev overrides
├── pnpm-workspace.yaml
├── turbo.json
└── package.json

Referencing Packages

Use workspace protocol in package.json:

{
  "dependencies": {
    "@tennis/shared": "workspace:*"
  }
}

Docker Infrastructure Setup

The tennis-team project uses Docker for PostgreSQL and Redis.

Starting Infrastructure

# Start PostgreSQL + Redis (from project root)
pnpm docker:infra

# Start full dev environment (all services)
pnpm docker:dev

# Check container status
docker compose -f docker/docker-compose.yml ps

Verifying Services

# Check PostgreSQL
psql -h localhost -U postgres -c "SELECT 1;"

# Check Redis
redis-cli ping
# Should return: PONG

Troubleshooting Docker

# Containers not starting
docker compose -f docker/docker-compose.yml logs postgres
docker compose -f docker/docker-compose.yml logs redis

# Reset containers
docker compose -f docker/docker-compose.yml down -v
pnpm docker:infra

Database Setup in Worktrees

Worktrees can use either a shared database (default) or an isolated database (for schema testing).

Shared Database (Default)

Uses the same database as your main development environment. No additional setup needed.

# Your .env already points to the shared dev database
# Just ensure Docker is running and start developing!
pnpm docker:infra
pnpm run dev

Isolated Database (For Schema Testing)

When you need a separate database (for migrations, schema changes, or isolated testing), use the --isolated flag when creating the worktree:

# Via worktree manager
.claude/skills/claude-worktree-manager/scripts/worktree.sh create my-feature --isolated

This automatically:

Creates a new PostgreSQL database: tennis_worktree_<timestamp>
Updates your .env with the new DATABASE_URL
Runs all migrations via pnpm --filter @tennis/backend run db:migrate

Manual Database Operations

# Run migrations
pnpm --filter @tennis/backend run db:migrate

# Connect to database
psql -h localhost -U postgres -d tennis_dev

# List all databases
psql -h localhost -U postgres -c "\l"

Isolated DB Cleanup

# List worktree databases
psql -h localhost -U postgres -c "SELECT datname FROM pg_database WHERE datname LIKE 'tennis_worktree_%';"

# Drop a specific worktree database
psql -h localhost -U postgres -c "DROP DATABASE tennis_worktree_<timestamp>;"

When to Use Isolated Database

Use isolated database when:

Testing new migrations before merging
Developing schema changes
Running destructive tests
Need a clean database state

Skip isolated database when:

Normal feature development
Bug fixes
Frontend work
Changes that don't touch the database

Redis Cache Management

Redis is used for caching. In worktrees:

# Check Redis connection
redis-cli ping

# Clear all cache (development only)
redis-cli FLUSHALL

# Monitor Redis activity
redis-cli MONITOR

Worktrees share the same Redis instance by default. If you need isolation, use a different Redis database number in your .env:

REDIS_URL="redis://localhost:6379/1"  # Use DB 1 instead of default 0

Tennis-Team Dev Workflow

Starting Development

# Start infrastructure first
pnpm docker:infra

# Start all apps in dev mode (backend + frontend + website)
pnpm dev

# Or start specific apps
pnpm --filter @tennis/backend run dev
pnpm --filter @tennis/frontend run dev

Common Commands (pnpm + turbo)

Building

# Build all packages
pnpm run build

# Build a specific package
pnpm --filter @tennis/backend run build
pnpm --filter @tennis/shared run build

# Build with turbo (uses caching)
pnpm turbo run build

# Force rebuild (ignore cache)
pnpm turbo run build --force

Testing

# Run all tests
pnpm test

# Run tests for a specific package
pnpm --filter @tennis/backend run test

# Run with turbo (respects dependencies)
pnpm turbo run test

Development

# Start development mode (all apps)
pnpm run dev

# Run linting
pnpm run lint

# Type checking
pnpm run typecheck

pnpm and Turbo in Monorepos

pnpm Workspace Architecture

How pnpm Works:

Content-addressable store at ~/.pnpm-store
Symlinked node_modules (not flat like npm)
Shared dependencies across all worktrees
Hard links from store to project node_modules

Directory Structure:

project/
├── node_modules/
│   ├── .pnpm/                    # Actual packages (symlinked)
│   ├── @tennis/shared -> .pnpm/...  # Workspace packages
│   └── react -> .pnpm/...        # External packages
├── apps/
│   ├── backend/
│   │   └── node_modules/ -> ../../node_modules
│   └── frontend/
│       └── node_modules/ -> ../../node_modules
└── pnpm-lock.yaml               # Lock file (CRITICAL)

Dependency Installation Patterns

Pattern 1: Root Level Dependencies (Shared)

# Install dependency for all packages
pnpm add -w typescript  # -w = workspace root

# Install dev dependency at root
pnpm add -D -w eslint

Pattern 2: Package-Specific Dependencies

# Install in specific package
pnpm --filter @tennis/backend add express

# Install dev dependency in package
pnpm --filter @tennis/backend add -D jest

Pattern 3: Workspace Protocol Dependencies

// apps/backend/package.json
{
  "dependencies": {
    "@tennis/shared": "workspace:*"
  }
}

Lock File Management

Understanding pnpm-lock.yaml

Critical File: pnpm-lock.yaml must be committed and kept in sync.

Lock File Rules:

Commit pnpm-lock.yaml to git
Never manually edit lock file
Run pnpm install after pulling changes
Don't ignore lock file in .gitignore

Handling Lock File Conflicts

# During merge conflict - accept theirs and regenerate (RECOMMENDED)
git checkout --theirs pnpm-lock.yaml
pnpm install  # Regenerates lock file with your changes

# After resolving
git add pnpm-lock.yaml
git commit --no-edit

Common pnpm Issues in Worktrees

Issue 1: .pnpm-install.pid Blocking Operations

# Before merging branches
rm -f .pnpm-install.pid

# If locked by process
lsof .pnpm-install.pid  # Find process using file
kill <PID>
rm .pnpm-install.pid

Issue 2: node_modules Symlink Confusion

# Workspace packages symlink
ls -la node_modules/@tennis/shared  # -> ../packages/shared

Issue 3: Workspace Dependencies Not Updating

# Rebuild affected packages
pnpm --filter @tennis/shared run build

# Or rebuild everything
pnpm turbo run build --force

Issue 4: Different pnpm Versions

# Check required version
cat package.json | jq .packageManager

# Install correct version globally
npm install -g pnpm@9.15.4

# Or use Corepack (recommended)
corepack enable
corepack prepare pnpm@9.15.4 --activate

Turbo Build Caching

Turbo in Worktrees

Issue: Turbo cache is worktree-local

# Workaround: Share cache between worktrees
export TURBO_CACHE_DIR=~/.turbo-cache

Cache Invalidation

# Clear turbo cache
pnpm turbo run build --force  # Bypass cache

# Delete cache directory
rm -rf node_modules/.cache/turbo

Debugging Turbo

# See what turbo is doing
pnpm turbo run build --dry-run

# Verbose output
pnpm turbo run build --verbose

# Show cache hits/misses
pnpm turbo run build --summarize

pnpm Commands Reference

Installation

# Install all dependencies (respects lock file)
pnpm install

# Install with frozen lock file (CI mode)
pnpm install --frozen-lockfile

# Force reinstall everything
pnpm install --force

Adding Dependencies

# Add to root workspace
pnpm add -w <package>

# Add to specific package
pnpm --filter <package-name> add <dependency>

# Add with version constraint
pnpm add react@^18.0.0

Removing Dependencies

# Remove from specific package
pnpm --filter <package-name> remove <dependency>

# Remove from workspace root
pnpm remove -w <package>

Workspace Commands

# Run script in all packages
pnpm -r run build  # -r = recursive

# Run in specific package
pnpm --filter @tennis/backend run test

# Run in packages matching glob
pnpm --filter "./apps/*" run start

# Run with dependencies first
pnpm --filter @tennis/frontend... run build
# ... = include dependencies

Best Practices for pnpm in Worktrees

Keep lock file in sync
```
git pull origin main
pnpm install
```

Clean install for stale worktrees

rm -rf node_modules
rm pnpm-lock.yaml
git checkout main -- pnpm-lock.yaml
pnpm install

Use consistent pnpm version
```
{
  "packageManager": "pnpm@9.15.4"
}
```

Ignore temporary files

.pnpm-install.pid
.pnpm-debug.log
node_modules/.cache/

Use filters for focused work

pnpm --filter @tennis/backend... run build
pnpm turbo run test --filter=[HEAD^1]

Handle lock file conflicts properly

git checkout --theirs pnpm-lock.yaml
pnpm install
git add pnpm-lock.yaml

Clean up before merging

rm -f .pnpm-install.pid
rm -rf node_modules/.cache
pnpm install
pnpm run build

Don't mix npm and pnpm

# Always use pnpm in this project
pnpm install

Troubleshooting pnpm Issues

"EBUSY: resource busy or locked"

pkill -f pnpm
rm .pnpm-install.pid
pnpm install

"Cannot find module '@tennis/shared'"

pnpm --filter @tennis/shared run build
pnpm run build

"integrity check failed"

rm pnpm-lock.yaml
pnpm install
git add pnpm-lock.yaml

Common Git Worktree Workflows

Workflow 1: Merging Worktree Branch to Main (via PR)

# 1. Ensure branch is pushed
cd ~/claude-worktrees/tennis-team/my-feature-1234567
git push -u origin HEAD

# 2. Create PR using gh CLI
gh pr create \
  --base main \
  --title "feat: my feature" \
  --body "Summary of changes"

# 3. After merge, clean up worktree
cd /path/to/main/repo
git worktree remove ~/claude-worktrees/tennis-team/my-feature-1234567
git fetch origin --prune

Workflow 2: Syncing Worktree with Main Branch

# 1. Navigate to worktree
cd ~/claude-worktrees/tennis-team/my-feature-1234567

# 2. Stash any uncommitted changes
git stash push -m "WIP: before sync"

# 3. Fetch latest from origin
git fetch origin main

# 4. Rebase onto main (cleaner history)
git rebase origin/main

# 5. Restore stashed changes
git stash pop

# 6. Rebuild dependencies and code
pnpm install
pnpm run build

Workflow 3: Handling Stale Worktrees

Option A: Update and Continue Working

cd ~/claude-worktrees/tennis-team/my-old-feature

# 1. Fetch latest
git fetch origin --prune

# 2. Rebase or merge latest changes
git rebase origin/main

# 3. Update dependencies (critical for stale worktrees)
pnpm install

# 4. Rebuild everything
pnpm turbo run build --force

# 5. Start Docker infrastructure
pnpm docker:infra

# 6. Run migrations
pnpm --filter @tennis/backend run db:migrate

Option B: Abandon and Remove

# From main repo directory
cd /path/to/main/repo

# 1. Remove worktree (even if dirty)
git worktree remove ~/claude-worktrees/tennis-team/my-old-feature --force

# 2. Delete local branch
git branch -D worktree/my-old-feature

# 3. Delete remote branch if exists
git push origin --delete worktree/my-old-feature

# 4. Prune remote references
git fetch origin --prune

Workflow 4: Environment Synchronization

# Get main repo path
MAIN_REPO=/path/to/main/repo

# Copy environment files
cp $MAIN_REPO/.env .env

# Copy Claude settings
cp $MAIN_REPO/.claude/settings.local.json .claude/settings.local.json

What NOT to Sync:

node_modules/ - Should be installed per worktree
dist/, build/ - Build artifacts are worktree-specific
.pnpm-install.pid - Process-specific temporary files

Workflow 5: Safe Worktree Removal

Before Removing - Checklist:

cd ~/claude-worktrees/tennis-team/my-feature

# 1. Check if there are uncommitted changes
git status

# 2. Check if branch is pushed
git log origin/HEAD..HEAD
# Empty = all commits are pushed

# If unpushed commits:
git push origin HEAD

Removal Steps:

# From main repo (NOT from worktree directory)
cd /path/to/main/repo

# 1. Remove worktree
git worktree remove ~/claude-worktrees/tennis-team/my-feature

# If worktree is dirty:
git worktree remove ~/claude-worktrees/tennis-team/my-feature --force

# 2. Delete branch (if no longer needed)
git branch -D worktree/my-feature

# 3. Delete remote branch
git push origin --delete worktree/my-feature

# 4. Prune
git fetch origin --prune
git worktree prune

Conflict Resolution Patterns

1. Package Lock File Conflicts

# Accept theirs and regenerate (RECOMMENDED)
git checkout --theirs pnpm-lock.yaml
pnpm install
git add pnpm-lock.yaml
git commit --no-edit

2. .pnpm-install.pid Conflicts

# This file should NEVER be committed
rm -f .pnpm-install.pid
git add .pnpm-install.pid 2>/dev/null || true

3. Environment File Conflicts

# Keep your worktree's environment
git checkout --ours .env
git add .env

4. Build Artifact Conflicts

# Delete and rebuild
rm -rf apps/*/dist packages/*/dist
git add -A
pnpm turbo run build --force

TypeScript Module Resolution Errors After Merge

# Solution 1: Force Rebuild with Turbo
pnpm turbo run build --force

# Solution 2: Clean Install and Build
rm -rf node_modules
rm -rf apps/*/node_modules packages/*/node_modules
rm -rf apps/*/dist packages/*/dist
pnpm install
pnpm turbo run build --force

# Solution 3: Build Specific Package First
pnpm --filter @tennis/shared run build
pnpm turbo run build

Complete Merge Workflow Example

# 1. Pre-merge cleanup
rm -f .pnpm-install.pid
git stash push -m "WIP before merge" 2>/dev/null || true

# 2. Fetch and merge
git fetch origin main
git merge origin/main --no-edit

# 3. If conflicts occur:
# Handle lock file
if git diff --name-only --diff-filter=U | grep -q "pnpm-lock.yaml"; then
  git checkout --theirs pnpm-lock.yaml
fi

# Handle .env (keep ours)
if git diff --name-only --diff-filter=U | grep -q ".env"; then
  git checkout --ours .env
fi

# Remove temp files from conflicts
rm -f .pnpm-install.pid
git add pnpm-lock.yaml .env 2>/dev/null || true
git commit --no-edit 2>/dev/null || true

# 4. Reinstall and rebuild
pnpm install
pnpm turbo run build --force

# 5. Restore stashed changes
git stash pop 2>/dev/null || true

# 6. Verify
pnpm run typecheck
echo "Merge complete!"

Best Practices Summary

Always remove .pnpm-install.pid before merging
Use git checkout --theirs pnpm-lock.yaml for lock conflicts
Keep your .env file (use git checkout --ours .env)
Run pnpm turbo run build --force after every merge
Use pnpm install before building (lock file may have changed)
Don't manually edit pnpm-lock.yaml
Don't commit build artifacts (dist/)
Don't skip the rebuild step after merging

Worktree Branch Naming Conventions

# Feature development
worktree/feature-name-<timestamp>

# Bug fixes
worktree/fix-bug-description-<timestamp>

# Environment-specific
worktree/staging-env-<timestamp>

Troubleshooting Common Issues

Issue: "fatal: 'branch' is already checked out"

# You can't checkout same branch in multiple worktrees
# Solution: Create new branch from it
git worktree add ~/worktrees/new -b new-branch existing-branch

Issue: Worktree directory deleted but git still tracks it

git worktree prune

Issue: Cannot remove worktree - "uncommitted changes"

git worktree remove ~/claude-worktrees/tennis-team/feature --force

Issue: Merge conflicts in multiple files

# Abort and rebase instead
git merge --abort
git fetch origin
git rebase origin/main

Cleanup

When done with a worktree:

Push any unpushed commits
Remove the worktree: git worktree remove <path>
Delete the branch: git branch -D <branch>
If isolated DB was used, drop it: psql -h localhost -U postgres -c "DROP DATABASE tennis_worktree_<timestamp>;"
Prune: git worktree prune && git fetch origin --prune

worktree-operations

SKILL.md