Claude Code Skill

Use Anthropic's Claude Code CLI via OpenClaw for intelligent coding assistance. Claude Code can build features, fix bugs, review code, and automate tedious development tasks.

Installation

Install Claude Code first:

# macOS / Linux / WSL
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell
irm https://claude.ai/install.ps1 | iex

# Homebrew
brew install --cask claude-code

# WinGet
winget install Anthropic.ClaudeCode

Prerequisites:

• Claude subscription (Pro, Max, Teams, or Enterprise) OR Claude Console account
• On first run, you'll be prompted to log in

⚠️ Critical: Use PTY Mode

Claude Code is an interactive terminal application. Always use

pty: true

# ✅ Correct - with PTY
bash pty: true command: "claude 'Build a REST API'"

# ❌ Wrong - will break or hang
bash command: "claude 'Build a REST API'"

Quick Start Patterns

One-Shot Task

For quick tasks in any directory:

bash pty: true workdir: ~/Projects/myapp command: "claude 'Add input validation to the login form'"

Background Long-Running Task

# Start in background
bash pty: true workdir: ~/Projects/myapp background: true command: "claude 'Refactor the authentication module'"

# Monitor with sessionId
process action: log sessionId: <session-id>

# Check if still running
process action: poll sessionId: <session-id>

# Send input if Claude asks a question
process action: submit sessionId: <session-id> data: "yes"

# Kill if needed
process action: kill sessionId: <session-id>

Spec-Driven Development with Claude Code

Claude Code integrates with Spec Kit (GitHub) and OpenSpec (Fission AI) for structured, specification-driven development.

Quick Comparison

OpenSpec

Philosophy: Fluid, iterative, easy, built for brownfield projects.

Installation

npm install -g @fission-ai/openspec@latest

Initialize Project

# In your project directory
cd ~/Projects/myapp
openspec init --tools claude

OpenSpec Workflow

# 1. Start a new change
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:new add-dark-mode'"

# 2. Fast-forward - create all planning docs at once
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:ff'"

# 3. Or step-by-step
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:continue'"  # creates proposal
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:continue'"  # creates specs
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:continue'"  # creates design
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:continue'"  # creates tasks

# 4. Apply - implement the tasks
bash pty: true workdir: ~/Projects/myapp background: true command: "claude '/opsx:apply'"

# 5. Verify - check implementation matches spec
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:verify'"

# 6. Archive - finalize and merge specs
bash pty: true workdir: ~/Projects/myapp command: "claude '/opsx:archive'"

OpenSpec Key Commands

/opsx:explore

/opsx:new <name>

/opsx:continue

/opsx:ff

/opsx:apply

/opsx:verify

/opsx:sync

/opsx:archive

/opsx:bulk-archive

/opsx:onboard

OpenSpec Project Structure

myapp/
├── openspec/
│   ├── specs/              # Main specs (source of truth)
│   │   └── ui/
│   │       └── spec.md
│   └── changes/            # Changes (one folder per feature)
│       └── add-dark-mode/
│           ├── proposal.md
│           ├── specs/      # Delta specs (ADDED/MODIFIED/REMOVED)
│           ├── design.md
│           └── tasks.md
└── .claude/commands/opsx/  # Claude slash commands

Spec Kit (GitHub)

Philosophy: Structured, phase-gated, comprehensive, ideal for enterprise.

Installation

# Install uv first: https://docs.astral.sh/uv/
uv tool install specify-cli --from git+https://github.com/github/spec-kit.git

Initialize Project

# Create new project
specify init my-project --ai claude

# Or initialize in existing project
cd ~/Projects/myapp
specify init . --ai claude

Spec Kit Workflow

# 1. Establish constitution (project principles)
bash pty: true workdir: ~/Projects/myapp command: "claude '/speckit.constitution Create principles for code quality, testing, and performance'"

# 2. Create specification
bash pty: true workdir: ~/Projects/myapp command: "claude '/speckit.specify Build a photo album app with drag-and-drop organization'"

# 3. Clarify (optional but recommended)
bash pty: true workdir: ~/Projects/myapp command: "claude '/speckit.clarify'"

# 4. Create technical plan
bash pty: true workdir: ~/Projects/myapp command: "claude '/speckit.plan Use React, Vite, and localStorage. No backend.'"

# 5. Generate tasks
bash pty: true workdir: ~/Projects/myapp command: "claude '/speckit.tasks'"

# 6. Implement
bash pty: true workdir: ~/Projects/myapp background: true command: "claude '/speckit.implement'"

Spec Kit Key Commands

/speckit.constitution

/speckit.specify

/speckit.clarify

/speckit.plan

/speckit.tasks

/speckit.implement

/speckit.analyze

/speckit.checklist

Spec Kit Project Structure

myapp/
├── .specify/
│   ├── memory/
│   │   └── constitution.md     # Project principles
│   ├── specs/
│   │   └── 001-photo-albums/   # Feature specs
│   │       ├── spec.md
│   │       ├── plan.md
│   │       ├── tasks.md
│   │       └── research.md
│   ├── scripts/                # Helper scripts
│   └── templates/              # Document templates
└── .claude/commands/           # Claude slash commands
    ├── speckit.constitution.md
    ├── speckit.specify.md
    └── ...

Choosing Between OpenSpec and Spec Kit

Use OpenSpec when:

• You want to get started quickly ⭐
• Working on existing (brownfield) projects
• Prefer iterative, fluid workflow
• Personal projects or small teams
• Need delta specs to track changes

Use Spec Kit when:

• Need strict, structured process
• Enterprise environment with compliance requirements
• Large teams needing governance
• Starting new (greenfield) projects
• Want comprehensive documentation

Using Both:

• OpenSpec for day-to-day iteration and quick features
• Spec Kit for major architectural decisions and large features
• Both can coexist in the same project

CLI Reference

OpenSpec CLI

openspec init [--tools claude,cursor,...]    # Initialize project
openspec list                                 # List active changes
openspec show <change-name>                   # View change details
openspec validate <change-name>               # Validate spec format
openspec update                               # Update agent instructions
openspec view                                 # Interactive dashboard

Spec Kit CLI

specify init <project> --ai claude            # Create new project
specify init . --ai claude                    # Init in current directory
specify init --here --ai claude               # Alternative syntax
specify check                                 # Check installed tools
specify init . --force --ai claude            # Force overwrite

See Also

• Claude Code Docs
• Claude Code on the Web
• MCP Documentation
• GitHub Actions Integration
• Slack Integration
• OpenSpec Docs
• Spec Kit Docs

Remember: Claude Code is powerful - give it clear instructions and trust it to do the work, but always review the results before committing! 🚀