Claude Code Skill

Claude Code Skill

Control Claude Code via MCP (Model Context Protocol). This skill unleashes the full power of Claude Code for openclaw agents, including persistent sessions, agent teams, and advanced tool control.

⚡ Quick Start

# Start a persistent Claude session for your project
claude-code-skill session-start myproject -d ~/project \
  --permission-mode acceptEdits \
  --allowed-tools "Bash,Read,Edit,Write,Glob,Grep"

# Send a plan (Claude will execute precisely)
claude-code-skill session-send myproject --stream '<精确的执行计划>'

# Send with high effort (ultrathink) for complex reasoning
claude-code-skill session-send myproject --stream --ultrathink 'Refactor the auth module'

# Enter plan mode — Claude creates a plan first, then executes
claude-code-skill session-send myproject --stream --plan 'Implement rate limiting'

# Check progress
claude-code-skill session-status myproject

# Compact session when context gets large
claude-code-skill session-compact myproject

# Switch model mid-session
claude-code-skill session-model myproject opus

🎯 When to Use This Skill

Use Persistent Sessions When:

• ✅ Multi-step tasks requiring multiple tool calls
• ✅ Iterative development (write code → test → fix → repeat)
• ✅ Long conversations needing full context
• ✅ Agent needs to work autonomously
• ✅ You want streaming real-time feedback

Use Direct MCP Tools When:

• ✅ Single command execution
• ✅ Quick file read/write
• ✅ One-off searches
• ✅ No context needed between operations

📚 Command Reference

Basic MCP Operations

# Connect to Claude Code MCP
claude-code-skill connect
claude-code-skill status
claude-code-skill tools

# Direct tool calls (no persistent session)
claude-code-skill bash "npm test"
claude-code-skill read /path/to/file.ts
claude-code-skill glob "**/*.ts" -p ~/project
claude-code-skill grep "TODO" -p ~/project -c
claude-code-skill call Write -a '{"file_path":"/tmp/test.txt","content":"Hello"}'

# Disconnect
claude-code-skill disconnect

Persistent Sessions (Agent Loop)

Starting Sessions

# Basic start
claude-code-skill session-start myproject -d ~/project

# With custom API endpoint (for Gemini/GPT proxy)
claude-code-skill session-start gemini-task -d ~/project \
  --base-url http://127.0.0.1:8082 \
  --model gemini-2.0-flash

# With permission mode (plan = preview changes before applying)
claude-code-skill session-start review -d ~/project --permission-mode plan

# With tool whitelist (auto-approve these tools)
claude-code-skill session-start safe -d ~/project \
  --allowed-tools "Bash(git:*),Read,Glob,Grep"

# With budget limit
claude-code-skill session-start limited -d ~/project --max-budget 1.50

# Full configuration
claude-code-skill session-start advanced -d ~/project \
  --permission-mode acceptEdits \
  --allowed-tools "Bash,Read,Edit,Write" \
  --disallowed-tools "Task" \
  --max-budget 5.00 \
  --model claude-opus-4-5 \
  --append-system-prompt "Always write tests" \
  --add-dir "/tmp,/var/log"

Permission Modes:

Sending Messages

# Basic send (blocks until complete)
claude-code-skill session-send myproject "Write unit tests for auth.ts"

# Streaming (see progress in real-time)
claude-code-skill session-send myproject "Refactor this module" --stream

# With custom timeout
claude-code-skill session-send myproject "Run all tests" -t 300000

# With effort control
claude-code-skill session-send myproject "Quick lint fix" --effort low
claude-code-skill session-send myproject "Design new auth system" --ultrathink

# Plan mode — Claude creates a plan, then executes
claude-code-skill session-send myproject --plan "Add rate limiting to all API endpoints"

# Auto-resume stopped sessions
claude-code-skill session-send myproject "Continue the migration" --auto-resume

# NDJSON output for programmatic consumption
claude-code-skill session-send myproject "Run tests" --stream --ndjson

Managing Sessions

# List active sessions
claude-code-skill session-list

# Get detailed status
claude-code-skill session-status myproject

# View conversation history
claude-code-skill session-history myproject -n 50

# Pause and resume
claude-code-skill session-pause myproject
claude-code-skill session-resume-paused myproject

# Fork a session (create a branch for experiments)
claude-code-skill session-fork myproject myproject-experiment

# Stop
claude-code-skill session-stop myproject

# Restart a failed session
claude-code-skill session-restart myproject

Effort & Model Control

# Set effort level for a session (persists across messages)
claude-code-skill session-effort myproject low      # Fast, minimal thinking
claude-code-skill session-effort myproject medium   # Balanced (default for Opus 4.6)
claude-code-skill session-effort myproject high     # Deep thinking
claude-code-skill session-effort myproject max      # Maximum capability, no token limit (Opus 4.6 only)
claude-code-skill session-effort myproject auto     # Reset to default

# Switch model mid-session
claude-code-skill session-model myproject opus
claude-code-skill session-model myproject sonnet
claude-code-skill session-model myproject gemini-pro

# Start session with effort preset
claude-code-skill session-start myproject -d ~/project --effort high

# Model aliases (built-in: opus, sonnet, haiku, gemini-flash, gemini-pro)
# Custom aliases via --model-overrides
claude-code-skill session-start myproject -d ~/project \
  --model-overrides '{"fast":"gemini-2.0-flash","smart":"claude-opus-4-5"}'

Cost Tracking

# Show cost breakdown for a session
claude-code-skill session-cost myproject
# → Model: claude-opus-4-5
# → Tokens in: 12,345 | out: 3,456 | cached: 8,901
# → Breakdown: Input $0.0103 | Cached $0.0033 | Output $0.0518
# → 💰 Total: $0.0654

Branching

# Branch a session (fork + optional model/effort change)
claude-code-skill session-branch myproject experiment
claude-code-skill session-branch myproject fast-branch --model sonnet --effort low

# Branch preserves full conversation history from parent
# Both parent and branch continue independently

Hooks (Webhook Callbacks)

# List available hooks
claude-code-skill session-hooks myproject

# Register webhook URLs for events
claude-code-skill session-hooks myproject \
  --on-tool-error http://localhost:8080/webhook \
  --on-context-high http://localhost:8080/webhook \
  --on-stop http://localhost:8080/webhook

# Available hooks:
# onToolError    — a tool call failed
# onContextHigh  — context usage exceeded 70%
# onStop         — session stopped (includes cost summary)
# onTurnComplete — each turn finished (includes usage)
# onStopFailure  — API error (rate limit, auth failure)

Config Files

# Load session config from JSON file
claude-code-skill session-start myproject --config agent.json

# agent.json example:
# {
#   "cwd": "~/project",
#   "permissionMode": "acceptEdits",
#   "allowedTools": ["Bash", "Read", "Edit", "Write"],
#   "effort": "high",
#   "maxBudget": "5.00",
#   "modelOverrides": { "fast": "gemini-2.0-flash" },
#   "appendSystemPrompt": "Always write tests"
# }

Context Management

# Compact session to reclaim context window
claude-code-skill session-compact myproject

# Compact with custom summary
claude-code-skill session-compact myproject --summary "Finished auth refactor, now on tests"

# Check context usage
claude-code-skill session-context myproject

Session History & Search

# Browse all Claude Code sessions
claude-code-skill sessions -n 20

# Search sessions by project
claude-code-skill session-search --project ~/myapp

# Search by time
claude-code-skill session-search --since "2h"
claude-code-skill session-search --since "2024-02-01"

# Search by query
claude-code-skill session-search "bug fix"

# Resume a historical session
claude-code-skill resume <session-id> "Continue where we left off" -d ~/project

Batch Operations

# Read multiple files at once
claude-code-skill batch-read "src/**/*.ts" "tests/**/*.test.ts" -p ~/project

🤝 Agent Team Features

Deploy multiple Claude agents working together on complex tasks.

Basic Agent Team

# Define a team of agents
claude-code-skill session-start team-project -d ~/project \
  --agents '{
    "architect": {
      "description": "Designs system architecture",
      "prompt": "You are a senior software architect. Design scalable, maintainable systems."
    },
    "developer": {
      "description": "Implements features",
      "prompt": "You are a full-stack developer. Write clean, tested code."
    },
    "reviewer": {
      "description": "Reviews code quality",
      "prompt": "You are a code reviewer. Check for bugs, style issues, and improvements."
    }
  }' \
  --agent architect

# Switch between agents mid-conversation
claude-code-skill session-send team-project "Design the authentication system"
# (architect responds)

claude-code-skill session-send team-project "@developer implement the design"
# (developer agent takes over)

claude-code-skill session-send team-project "@reviewer review the implementation"
# (reviewer agent takes over)

Pre-configured Team Templates

# Code review team
claude-code-skill session-start review -d ~/project \
  --agents '{
    "security": {"prompt": "Focus on security vulnerabilities"},
    "performance": {"prompt": "Focus on performance issues"},
    "quality": {"prompt": "Focus on code quality and maintainability"}
  }' \
  --agent security

# Full-stack team
claude-code-skill session-start fullstack -d ~/project \
  --agents '{
    "frontend": {"prompt": "React/TypeScript frontend specialist"},
    "backend": {"prompt": "Node.js/Express backend specialist"},
    "database": {"prompt": "PostgreSQL/Redis database specialist"}
  }' \
  --agent frontend

🔧 Advanced Features

Tool Control

# Allow specific tools with patterns
--allowed-tools "Bash(git:*,npm:*),Read,Edit"

# Deny dangerous operations
--disallowed-tools "Bash(rm:*,sudo:*),Write(/etc/*)"

# Limit to specific tool set
--tools "Read,Glob,Grep"

# Disable all tools
--tools ""

System Prompts

# Replace system prompt completely
--system-prompt "You are a Python expert. Always use type hints."

# Append to existing prompt
--append-system-prompt "Always run tests after changes."

Session Management

# Resume with fork (create a branch)
--resume <session-id> --fork-session

# Use custom UUID for session
--session-id "550e8400-e29b-41d4-a716-446655440000"

# Add additional working directories
--add-dir "/var/log,/tmp/workspace"

Multi-Model Support (Proxy)

Use --base-url to route requests through a proxy, enabling other models (Gemini, GPT) to power Claude Code:

# Use Gemini via claude-code-proxy
claude-code-skill session-start gemini-task -d ~/project \
  --base-url http://127.0.0.1:8082 \
  --model claude-3-5-sonnet-20241022  # Proxy will map to Gemini

# Use GPT via proxy
claude-code-skill session-start gpt-task -d ~/project \
  --base-url http://127.0.0.1:8082 \
  --model claude-3-haiku-20240307  # Proxy will map to GPT

Note: Requires claude-code-proxy running on port 8082 with proper API keys configured.

# Start the proxy
cd ~/clawd/claude-code-proxy && source .venv/bin/activate
uvicorn server:app --host 127.0.0.1 --port 8082

🎓 Best Practices

For OpenClaw Agents

1. Always use persistent sessions for multi-step tasks

   # ❌ Bad: Multiple disconnect/reconnect cycles
   claude-code-skill bash "step1"
   claude-code-skill bash "step2"
   
   # ✅ Good: Single persistent session
   claude-code-skill session-start task -d ~/project
   claude-code-skill session-send task "Do step1 then step2"
   

2. Use --stream for long-running tasks

   claude-code-skill session-send task "Run full test suite" --stream
   

3. Set budget limits for safety

   --max-budget 2.00  # Stop after $2 of API usage
   

4. Use plan mode for critical changes

   --permission-mode plan  # Preview before applying
   

5. Fork before experiments

   claude-code-skill session-fork main experimental
   claude-code-skill session-send experimental "Try risky refactor"
   

Error Recovery

# If session fails:
claude-code-skill session-status myproject  # Check what happened
claude-code-skill session-history myproject -n 20  # See recent events
claude-code-skill session-restart myproject  # Restart from last good state

# If you need to start over:
claude-code-skill session-stop myproject
claude-code-skill session-start myproject -d ~/project --resume <old-session-id>

🏗️ Architecture

openclaw agent
    ↓
claude-code-skill CLI (this tool)
    ↓ HTTP
backend-api API (:18795)
    ↓ MCP
claude mcp serve (Claude Code)
    ↓
Your files & tools

🔌 Available Tools (via MCP)

All Claude Code tools are accessible:

📊 Examples

Example 1: Code Review

claude-code-skill session-start review -d ~/myapp \
  --permission-mode plan \
  --agents '{"security":{"prompt":"Focus on security"},"quality":{"prompt":"Focus on quality"}}' \
  --agent security

claude-code-skill session-send review \
  "Review all TypeScript files in src/, check for security issues and code quality problems" \
  --stream

Example 2: Automated Testing

claude-code-skill session-start test -d ~/myapp \
  --allowed-tools "Bash(npm:*,git:*),Read,Write" \
  --max-budget 1.00

claude-code-skill session-send test \
  "Find all untested functions, write unit tests, run tests, fix failures"

Example 3: Multi-Agent Debugging

claude-code-skill session-start debug -d ~/myapp \
  --agents '{
    "detective": {"prompt": "Find the root cause of bugs"},
    "fixer": {"prompt": "Implement fixes"},
    "tester": {"prompt": "Verify fixes work"}
  }' \
  --agent detective

claude-code-skill session-send debug "We have a memory leak in the API server" --stream
# Detective investigates, then hands off to fixer, then to tester

🔗 Integration with OpenClaw

When openclaw needs to perform complex coding tasks:

# From within openclaw agent context:
openclaw skills run claude-code-skill -- session-start task -d ~/project
openclaw skills run claude-code-skill -- session-send task "Implement feature X" --stream
openclaw skills run claude-code-skill -- session-status task

Or use the skill programmatically via backend-api HTTP API (see TOOLS.md section 3).

📖 See Also

• TOOLS.md section 3 - Full HTTP API documentation
• backend-api endpoints - Backend integration details
• Claude Code docs - Official Claude Code documentation (query via qmd tool)