Git Worktree Workflow Agent

What's New in Git Worktree & AI Agents (2025)

•AI Agent Integration: 4-5 parallel Claude Code agents working independently on different features
•Complete Isolation: Each worktree prevents agents from modifying wrong branches or interfering with each other
•Structured Organization: ./worktrees/feature/, ./worktrees/bugfix/, ./worktrees/review/ patterns for clarity
•Production Adoption: incident.io uses worktrees for parallel AI agent development
•Emergency Hotfix Pattern: Create worktree on release branch without disrupting ongoing development
•Cleanup Best Practices: Systematic removal of orphaned worktrees with git worktree prune
•Meaningful Directory Names: Avoid confusion when multiple agents or developers work simultaneously

Overview

This agent teaches using Git worktrees to isolate changes in separate working directories, enabling parallel development without branch switching and creating clean PRs when complete. Worktrees are particularly powerful for AI agent workflows, where multiple autonomous agents can work on different features simultaneously without conflict.

Core Concept

Git worktrees let you have multiple working directories from the same repository:

•Main worktree: Your primary working directory (usually main or master)
•Linked worktrees: Additional directories for features/fixes, each on different branches
•No branch switching: Each worktree has its own branch checked out
•Shared .git: All worktrees share the same repository data

CLI Commands

Creating Worktrees

bash

# Create worktree for new feature
git worktree add ../feature-auth feature/auth

# Create worktree with new branch from current HEAD
git worktree add -b fix/login-bug ../fix-login

# Create worktree from specific branch
git worktree add -b feature/api ../api-work origin/main

# Create worktree in subdirectory
git worktree add worktrees/feature-x -b feature/x

Listing Worktrees

bash

# List all worktrees
git worktree list

# List with more details
git worktree list --porcelain

Removing Worktrees

bash

# Remove worktree (deletes directory and unregisters)
git worktree remove ../feature-auth

# Remove even with uncommitted changes
git worktree remove --force ../feature-auth

# Clean up stale worktree references
git worktree prune

Moving Between Worktrees

bash

# Navigate to worktree
cd ../feature-auth

# Or use absolute path
cd ~/git/myproject-feature-auth

# Return to main worktree
cd ~/git/myproject

Complete Workflow

Starting New Work

bash

#!/bin/bash
# start-work.sh <feature-name>

set -euo pipefail

FEATURE_NAME=${1:?Usage: start-work.sh <feature-name>}
BRANCH_NAME="feature/${FEATURE_NAME}"
WORKTREE_DIR="../${FEATURE_NAME}"

echo "Starting new work: $FEATURE_NAME"

# Create worktree from main
git worktree add -b "$BRANCH_NAME" "$WORKTREE_DIR" origin/main

# Navigate to worktree
cd "$WORKTREE_DIR"

echo "✅ Worktree created at: $WORKTREE_DIR"
echo "   Branch: $BRANCH_NAME"
echo "   Ready to start coding!"

# Optional: Open in editor
# code .

Working in Worktree

bash

# In your worktree directory
cd ../feature-auth

# Make changes
echo "new feature" > feature.ts

# Stage and commit as usual
git add feature.ts
git commit -m "feat: add authentication"

# Push to remote
git push -u origin feature/auth

Creating PR from Worktree

bash

#!/bin/bash
# pr-from-worktree.sh

set -euo pipefail

# Ensure we're in a worktree (not main)
CURRENT_BRANCH=$(git branch --show-current)
if [ "$CURRENT_BRANCH" = "main" ] || [ "$CURRENT_BRANCH" = "master" ]; then
  echo "❌ Cannot create PR from main branch"
  exit 1
fi

echo "Creating PR from branch: $CURRENT_BRANCH"

# Push changes
git push -u origin "$CURRENT_BRANCH"

# Create PR
gh pr create --fill

echo "✅ PR created!"
echo "View: gh pr view --web"

Completing Work

bash

#!/bin/bash
# complete-work.sh

set -euo pipefail

CURRENT_BRANCH=$(git branch --show-current)
WORKTREE_PATH=$(pwd)

echo "Completing work on: $CURRENT_BRANCH"

# Ensure everything is committed
if ! git diff --quiet || ! git diff --cached --quiet; then
  echo "❌ You have uncommitted changes"
  git status
  exit 1
fi

# Push final changes
git push

# Create PR if it doesn't exist
if ! gh pr view &>/dev/null; then
  echo "Creating PR..."
  gh pr create --fill
fi

# Show PR status
gh pr view

# Return to main worktree
cd "$(git rev-parse --show-toplevel)"

echo ""
echo "Next steps:"
echo "  1. Review PR: gh pr view --web"
echo "  2. After merge: git worktree remove $WORKTREE_PATH"
echo "  3. Clean up: git branch -d $CURRENT_BRANCH"

Advanced Patterns

Organized Worktree Layout

bash

# Create worktrees in dedicated directory
WORKTREE_BASE="$HOME/worktrees/$(basename $(git rev-parse --show-toplevel))"
mkdir -p "$WORKTREE_BASE"

# Create worktree
git worktree add "$WORKTREE_BASE/feature-auth" -b feature/auth

# Your layout:
# ~/git/myproject/              (main worktree)
# ~/worktrees/myproject/
#   ├── feature-auth/            (feature worktree)
#   ├── fix-bug-123/             (bugfix worktree)
#   └── refactor-api/            (refactor worktree)

Quick Switch Script

bash

#!/bin/bash
# switch-worktree.sh <worktree-name>

WORKTREE_NAME=${1:?Usage: switch-worktree.sh <worktree-name>}
WORKTREE_BASE="$HOME/worktrees/$(basename $(git rev-parse --show-toplevel))"
WORKTREE_PATH="$WORKTREE_BASE/$WORKTREE_NAME"

if [ -d "$WORKTREE_PATH" ]; then
  cd "$WORKTREE_PATH"
  echo "✅ Switched to: $WORKTREE_PATH"
else
  echo "❌ Worktree not found: $WORKTREE_PATH"
  echo ""
  echo "Available worktrees:"
  git worktree list
  exit 1
fi

List Worktrees with Branch Status

bash

#!/bin/bash
# worktree-status.sh

git worktree list | while IFS= read -r line; do
  # Extract worktree path
  path=$(echo "$line" | awk '{print $1}')
  branch=$(echo "$line" | awk '{print $3}' | tr -d '[]')

  echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
  echo "📁 $path"
  echo "🌿 $branch"

  # Show git status in that worktree
  if [ -d "$path" ]; then
    (
      cd "$path" 2>/dev/null && {
        if git diff --quiet && git diff --cached --quiet; then
          echo "✅ Clean"
        else
          echo "⚠️  Uncommitted changes"
        fi

        # Show if branch has upstream
        if git rev-parse --abbrev-ref @{u} &>/dev/null; then
          ahead=$(git rev-list --count @{u}..HEAD)
          behind=$(git rev-list --count HEAD..@{u})
          [ $ahead -gt 0 ] && echo "⬆️  $ahead commit(s) ahead"
          [ $behind -gt 0 ] && echo "⬇️  $behind commit(s) behind"
        else
          echo "🔗 No upstream branch"
        fi
      }
    )
  fi
  echo ""
done

Cleanup Merged Worktrees

bash

#!/bin/bash
# cleanup-merged-worktrees.sh

set -euo pipefail

# Get default branch
DEFAULT_BRANCH=$(git remote show origin | grep "HEAD branch" | sed 's/.*: //')

echo "Cleaning up merged worktrees (base: $DEFAULT_BRANCH)..."

# Update refs
git fetch origin --prune

# Find merged branches
git worktree list --porcelain | grep -E "^worktree|^branch" | while read -r line; do
  if [[ $line =~ ^worktree ]]; then
    current_worktree=$(echo "$line" | awk '{print $2}')
  elif [[ $line =~ ^branch ]]; then
    branch=$(echo "$line" | awk '{print $2}' | sed 's|refs/heads/||')

    # Skip default branch
    [ "$branch" = "$DEFAULT_BRANCH" ] && continue

    # Check if merged
    if git branch --merged "origin/$DEFAULT_BRANCH" | grep -q "^[* ]*$branch$"; then
      echo "🗑️  Removing merged worktree: $current_worktree ($branch)"
      git worktree remove "$current_worktree" || true
      git branch -d "$branch" || true
    fi
  fi
done

# Prune stale references
git worktree prune

echo "✅ Cleanup complete"

AI Agent Workflows (2025)

The incident.io Case Study

Real-world example: incident.io runs 4-5 Claude Code agents in parallel using worktrees, enabling multiple AI agents to work on different features simultaneously without conflicts.

Key benefits:

•Complete isolation: Each agent operates in its own worktree with its own branch and file state
•No cross-contamination: Agents can't accidentally modify files from other agents' work
•Parallel execution: 4-5 features developed concurrently by autonomous agents
•Clean git history: Each agent creates focused, single-purpose PRs
•Zero coordination overhead: No need to orchestrate agent work order

Structured Directory Organization for AI Agents

bash

# Organized worktree structure for AI agent workflows
project/
├── .git/                          # Shared git repository
├── main/                          # Main development worktree
└── worktrees/
    ├── feature/
    │   ├── agent-1-auth/          # Claude agent working on authentication
    │   ├── agent-2-api/           # Claude agent building API endpoints
    │   └── agent-3-ui/            # Claude agent creating UI components
    ├── bugfix/
    │   ├── agent-4-login-fix/     # Claude agent fixing login bug
    │   └── agent-5-perf/          # Claude agent optimizing performance
    └── review/
        └── human-review-pr-123/   # Human reviewing AI-generated PR

Setting Up AI Agent Worktrees

bash

#!/bin/bash
# setup-ai-agent-worktree.sh <agent-id> <task-type> <task-name>
# Usage: setup-ai-agent-worktree.sh agent-1 feature authentication

set -euo pipefail

AGENT_ID=${1:?Usage: setup-ai-agent-worktree.sh <agent-id> <task-type> <task-name>}
TASK_TYPE=${2:?Usage: setup-ai-agent-worktree.sh <agent-id> <task-type> <task-name>}
TASK_NAME=${3:?Usage: setup-ai-agent-worktree.sh <agent-id> <task-type> <task-name>}

REPO_ROOT=$(git rev-parse --show-toplevel)
WORKTREE_BASE="$REPO_ROOT/worktrees"
TASK_DIR="$WORKTREE_BASE/$TASK_TYPE/$AGENT_ID-$TASK_NAME"
BRANCH_NAME="$TASK_TYPE/$TASK_NAME"

echo "🤖 Setting up AI agent worktree"
echo "   Agent: $AGENT_ID"
echo "   Task: $TASK_TYPE/$TASK_NAME"
echo "   Path: $TASK_DIR"

# Create organized directory structure
mkdir -p "$WORKTREE_BASE/$TASK_TYPE"

# Fetch latest changes
git fetch origin

# Create worktree for agent
git worktree add -b "$BRANCH_NAME" "$TASK_DIR" origin/main

echo "✅ AI agent worktree ready!"
echo ""
echo "Next steps:"
echo "  1. Navigate: cd $TASK_DIR"
echo "  2. Agent starts working in isolated environment"
echo "  3. Agent commits: git commit -m 'feat: ...'"
echo "  4. Agent creates PR: gh pr create --fill"

AI Agent Isolation Benefits

Complete isolation prevents:

•✅ Agent A modifying Agent B's files
•✅ Merge conflicts between parallel agent work
•✅ Branch checkout race conditions
•✅ Uncommitted changes interfering with other agents
•✅ Accidental deletion of other agents' work

Example scenario (4 parallel agents):

bash

# Agent 1: Authentication feature
cd worktrees/feature/agent-1-auth/
# Works on: src/auth/*.ts

# Agent 2: API endpoints
cd worktrees/feature/agent-2-api/
# Works on: src/api/*.ts

# Agent 3: UI components
cd worktrees/feature/agent-3-ui/
# Works on: src/components/*.tsx

# Agent 4: Database migrations
cd worktrees/feature/agent-4-db/
# Works on: prisma/migrations/*.sql

# All 4 agents operate independently without conflicts!

Emergency Hotfix with AI Agent (No Main Disruption)

bash

# Production bug discovered while agents work on features
# Create emergency hotfix worktree without disrupting main development

# Agent 5: Emergency hotfix
git worktree add worktrees/bugfix/agent-5-hotfix -b hotfix/critical-bug release/v1.0

cd worktrees/bugfix/agent-5-hotfix/

# Agent makes critical fix
echo "fix" > critical-fix.ts
git add critical-fix.ts
git commit -m "fix: critical production bug"
git push -u origin hotfix/critical-bug

# Create hotfix PR targeting release branch
gh pr create --base release/v1.0 --title "fix: critical bug" --fill

# Main worktree and other agent worktrees continue unaffected!

Cleanup After AI Agent Completion

bash

#!/bin/bash
# cleanup-ai-agent-worktree.sh <agent-id> <task-type> <task-name>

set -euo pipefail

AGENT_ID=${1:?}
TASK_TYPE=${2:?}
TASK_NAME=${3:?}

REPO_ROOT=$(git rev-parse --show-toplevel)
TASK_DIR="$REPO_ROOT/worktrees/$TASK_TYPE/$AGENT_ID-$TASK_NAME"
BRANCH_NAME="$TASK_TYPE/$TASK_NAME"

echo "🧹 Cleaning up AI agent worktree: $AGENT_ID"

# Check if PR is merged
if gh pr view "$BRANCH_NAME" --json state --jq .state 2>/dev/null | grep -q "MERGED"; then
  echo "✅ PR merged, cleaning up..."

  # Remove worktree
  git worktree remove "$TASK_DIR" 2>/dev/null || {
    echo "⚠️  Worktree already removed or has uncommitted changes"
    git worktree remove --force "$TASK_DIR"
  }

  # Delete local branch
  git branch -d "$BRANCH_NAME" 2>/dev/null || {
    echo "⚠️  Force deleting branch"
    git branch -D "$BRANCH_NAME"
  }

  # Delete remote branch
  git push origin --delete "$BRANCH_NAME" 2>/dev/null || {
    echo "ℹ️  Remote branch already deleted"
  }

  echo "✅ Cleanup complete for $AGENT_ID"
else
  echo "⚠️  PR not merged yet"
  gh pr view "$BRANCH_NAME"
  exit 1
fi

Orphaned Worktree Cleanup

bash

#!/bin/bash
# find-orphaned-worktrees.sh
# Finds worktrees where the branch has been deleted remotely

set -euo pipefail

echo "🔍 Searching for orphaned worktrees..."

git fetch --prune  # Update remote tracking branches

ORPHANED=0

git worktree list --porcelain | grep -E "^worktree|^branch" | while read -r line; do
  if [[ $line =~ ^worktree ]]; then
    current_worktree=$(echo "$line" | awk '{print $2}')
  elif [[ $line =~ ^branch ]]; then
    branch=$(echo "$line" | awk '{print $2}' | sed 's|refs/heads/||')

    # Skip main/master branches
    [[ "$branch" =~ ^(main|master)$ ]] && continue

    # Check if remote branch exists
    if ! git show-ref --verify --quiet "refs/remotes/origin/$branch"; then
      echo "🗑️  Orphaned worktree found:"
      echo "   Path: $current_worktree"
      echo "   Branch: $branch (remote deleted)"
      echo "   Cleanup: git worktree remove $current_worktree && git branch -d $branch"
      echo ""
      ORPHANED=$((ORPHANED + 1))
    fi
  fi
done

# Prune stale worktree admin files
git worktree prune

if [ $ORPHANED -eq 0 ]; then
  echo "✅ No orphaned worktrees found"
else
  echo "⚠️  Found $ORPHANED orphaned worktree(s)"
fi

Best Practices for AI Agent Workflows

•

Meaningful Directory Names: Use descriptive names like agent-1-auth instead of agent-1 or temp-worktree

bash

# ✅ Good - clear what agent is working on
worktrees/feature/agent-1-authentication/
worktrees/feature/agent-2-api-endpoints/

# ❌ Bad - unclear purpose
worktrees/feature/agent-1/
worktrees/feature/temp/

•

Structured Categories: Organize by task type (feature/bugfix/review)

bash

worktrees/
├── feature/    # New capabilities
├── bugfix/     # Bug fixes
├── refactor/   # Code improvements
├── docs/       # Documentation
└── review/     # Human review of AI work

•

Agent Coordination: Use clear branch naming for visibility

bash

# Agent creates branch with clear prefix
feature/add-authentication      # Agent 1
feature/add-api-endpoints       # Agent 2
bugfix/fix-login-validation     # Agent 3

•

Automatic Cleanup: Run cleanup scripts after PR merge

bash

# In CI/CD after merge
cleanup-ai-agent-worktree.sh agent-1 feature authentication

•

Monitoring: Track active agent worktrees

bash

# List all active AI agent worktrees
git worktree list | grep "agent-"

Integration with PR Workflow

Combined Start-to-PR Script

bash

#!/bin/bash
# feature.sh <command> [name]
# Commands: start, pr, done

set -euo pipefail

COMMAND=${1:?Usage: feature.sh <start|pr|done> [name]}
WORKTREE_BASE="$HOME/worktrees/$(basename $(git rev-parse --show-toplevel))"

case $COMMAND in
  start)
    FEATURE_NAME=${2:?Usage: feature.sh start <feature-name>}
    BRANCH_NAME="feature/${FEATURE_NAME}"
    WORKTREE_DIR="$WORKTREE_BASE/$FEATURE_NAME"

    echo "Starting feature: $FEATURE_NAME"

    # Ensure we're up to date
    git fetch origin

    # Create worktree
    git worktree add -b "$BRANCH_NAME" "$WORKTREE_DIR" origin/main

    # Navigate
    cd "$WORKTREE_DIR"

    echo "✅ Ready to code!"
    echo "   Path: $WORKTREE_DIR"
    echo "   Branch: $BRANCH_NAME"
    ;;

  pr)
    # Must be in worktree
    CURRENT_BRANCH=$(git branch --show-current)
    if [ "$CURRENT_BRANCH" = "main" ]; then
      echo "❌ Must be in feature worktree"
      exit 1
    fi

    # Push and create PR
    git push -u origin "$CURRENT_BRANCH"
    gh pr create --fill

    echo "✅ PR created!"
    gh pr view
    ;;

  done)
    CURRENT_BRANCH=$(git branch --show-current)
    WORKTREE_PATH=$(pwd)

    # Ensure clean
    if ! git diff --quiet || ! git diff --cached --quiet; then
      echo "❌ Uncommitted changes"
      exit 1
    fi

    # Check if PR is merged
    if gh pr view --json state --jq .state | grep -q "MERGED"; then
      echo "✅ PR merged!"

      # Return to main worktree
      MAIN_WORKTREE=$(git worktree list | grep "(main)" | awk '{print $1}')
      cd "$MAIN_WORKTREE"

      # Update main
      git pull origin main

      # Remove worktree and branch
      git worktree remove "$WORKTREE_PATH"
      git branch -d "$CURRENT_BRANCH"

      echo "✅ Cleaned up worktree and branch"
    else
      echo "⚠️  PR not merged yet"
      gh pr view
    fi
    ;;

  *)
    echo "Unknown command: $COMMAND"
    echo "Usage: feature.sh <start|pr|done> [name]"
    exit 1
    ;;
esac

Best Practices

1. Worktree Naming Convention

bash

# Use consistent naming
git worktree add ../feature-auth -b feature/auth         # ✅ Good
git worktree add ../auth -b feature/authentication       # ❌ Inconsistent

# Match directory name to branch suffix
feature/auth     → ../feature-auth
fix/login-bug    → ../fix-login-bug
refactor/api     → ../refactor-api

2. Keep Worktrees Outside Main Repo

bash

# ✅ Good - outside main repo
~/git/myproject/                    (main)
~/git/myproject-feature-auth/       (worktree)
~/git/myproject-fix-bug/            (worktree)

# ❌ Bad - inside main repo (causes confusion)
~/git/myproject/                    (main)
~/git/myproject/feature-auth/       (worktree - AVOID)

3. Regular Cleanup

bash

# Weekly cleanup of merged worktrees
git fetch --prune
git worktree prune
git branch --merged | grep -v "main\|master" | xargs git branch -d

4. Don't Share Branches Between Worktrees

bash

# ❌ Bad - same branch in multiple worktrees
git worktree add ../feature-1 -b feature/auth
git worktree add ../feature-2 feature/auth  # ERROR!

# ✅ Good - unique branch per worktree
git worktree add ../feature-1 -b feature/auth
git worktree add ../feature-2 -b feature/auth-v2

5. Backup Before Removing

bash

# Check for uncommitted changes before removing
if ! (cd ../feature-auth && git diff --quiet); then
  echo "⚠️  Uncommitted changes in worktree!"
  exit 1
fi

git worktree remove ../feature-auth

Common Workflows

Workflow 1: Quick Bug Fix

bash

# Start fix
git worktree add ../fix-critical -b fix/critical-bug origin/main
cd ../fix-critical

# Make fix
echo "fix" > bug-fix.ts
git add bug-fix.ts
git commit -m "fix: critical bug"

# Create PR
git push -u origin fix/critical-bug
gh pr create --title "fix: critical bug" --body "Fixes #123"

# After merge
cd ~/git/myproject
git worktree remove ../fix-critical
git branch -d fix/critical-bug

Workflow 2: Long-Running Feature

bash

# Start feature
git worktree add ../feature-big -b feature/big-feature origin/main
cd ../feature-big

# Work over several days
git commit -m "feat: part 1"
git push -u origin feature/big-feature

# Sync with main periodically
git fetch origin
git rebase origin/main

# Create PR when ready
gh pr create --fill

Workflow 3: Parallel Features

bash

# Work on multiple features simultaneously
git worktree add ../feature-api -b feature/api
git worktree add ../feature-ui -b feature/ui
git worktree add ../feature-docs -b feature/docs

# Switch between them without branch checkout
cd ../feature-api    # Work on API
cd ../feature-ui     # Switch to UI
cd ../feature-docs   # Switch to docs

Troubleshooting

Issue: "Cannot remove worktree with uncommitted changes"

bash

# Option 1: Commit or stash changes
cd ../feature-auth
git add -A && git commit -m "WIP"
# or
git stash

# Option 2: Force remove (loses changes!)
git worktree remove --force ../feature-auth

Issue: "Branch already checked out"

bash

# You can't check out the same branch in multiple worktrees
# Solution: Create a new branch
git worktree add ../feature-auth-v2 -b feature/auth-v2 feature/auth

Issue: Worktree directory deleted manually

bash

# Clean up stale references
git worktree prune

# Verify
git worktree list

When to Ask for Help

Ask the user for clarification when:

•Worktree layout preferences (flat vs nested, naming conventions)
•How to handle merge conflicts during rebase
•Whether to keep or remove worktree after PR merge
•Multiple people working on same repository with worktrees
•Integration with IDEs or editors for worktree navigation