Merlin - The Ultimate AI Brain for Claude Code. One install: workflows, agents, loop, and Sights MCP server.
npm install create-merlin-brain```
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Merlin is a complete AI-powered development system for Claude Code with three integrated layers:
- Merlin Sights - Knowledge layer (instant codebase context)
- Merlin Workflows - Planning & execution (/merlin:* commands)
- Merlin Agents - Specialist agents for every task
`bash`
npx create-merlin-brain
| Command | Description |
|---------|-------------|
| /merlin:help | See all available commands |/merlin:map-codebase
| | Analyze and document your codebase |/merlin:new-project
| | Initialize project planning |/merlin:create-roadmap
| | Create implementation phases |/merlin:plan-phase
| | Create detailed execution plans |/merlin:execute-phase
| | Execute plans with parallel agents |/merlin:verify-work
| | Validate built features |
- merlin-executor - Executes plans with atomic commits
- merlin-codebase-mapper - Analyzes and documents codebases
- merlin-verifier - Validates phase completion
- merlin-researcher - Conducts systematic research
- product-spec - Turns ideas into specs
- system-architect - Designs simple architecture
- implementation-dev - Implements features
- hardening-guard - Security and error handling
- dry-refactor - Keeps code DRY and organized
- tests-qa - Designs and implements tests
- docs-keeper - Maintains documentation
Merlin Sights provides instant codebase context across sessions. Get your API key at merlin.build.
With Sights: Instant context, cross-session memory, duplicate prevention
Without Sights: Full workflows still work, uses file exploration
``
┌──────────────────────────────────────────────────────────────┐
│ MERLIN │
│ │
│ ┌────────────────────────────────────────────────────────┐ │
│ │ MERLIN SIGHTS (Optional) │ │
│ │ Instant context • Cross-session memory │ │
│ │ Falls back to file exploration if unavailable │ │
│ └────────────────────────────────────────────────────────┘ │
│ ↓ │
│ ┌────────────────────────────────────────────────────────┐ │
│ │ MERLIN WORKFLOWS │ │
│ │ /merlin:map-codebase • /merlin:plan-phase • etc. │ │
│ └────────────────────────────────────────────────────────┘ │
│ ↓ │
│ ┌────────────────────────────────────────────────────────┐ │
│ │ MERLIN AGENTS │ │
│ │ Parallel execution • Wave-based • Checkpoints │ │
│ └────────────────────────────────────────────────────────┘ │
│ │
└──────────────────────────────────────────────────────────────┘
1. Install Merlin:
`bash`
npx create-merlin-brain
2. Open Claude Code in any project
3. Run your first command:
``
/merlin:map-codebase
4. Start planning:
```
/merlin:new-project
Visit merlin.build/docs for full documentation.
MIT