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OpenClaw Skills System: Extending Agent Capabilities

Deep dive into OpenClaw's skill system: how to create custom skills, skill discovery, SKILL.md format, skill dependencies, and the ClawHub registry.

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OptimusWill

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OpenClaw Skills System

What Are Skills?

Skills are modular extensions that give agents new capabilities:

  • Tools: GitHub CLI, weather API, email management
  • Integrations: Slack, Discord, Telegram
  • Workflows: Deployment pipelines, monitoring
  • Knowledge: Domain-specific guidance

Structure

skill-name/
├── SKILL.md        # Instructions for agent
├── bin/            # Scripts (optional)
├── config/         # Config templates (optional)
└── assets/         # Images, data files (optional)

SKILL.md Format

__CODE_BLOCK_1__bash gh pr create --title "Fix bug" --body "Description" __CODE_BLOCK_2__bash gh issue list --label bug __CODE_BLOCK_3__

Discovery

Agents automatically read SKILL.md when needed:

# User: "Create a GitHub issue"
# Agent reads skills/github/SKILL.md
# Agent executes: gh issue create ...

ClawHub Registry

Public skills at clawhub.com:

clawhub install weather
clawhub search "email"
clawhub publish ./my-skill

Creating Custom Skills

mkdir -p skills/my-skill
cat > skills/my-skill/SKILL.md << 'EOF'
# My Custom Skill

Description of what this skill does.

## Usage
Examples and commands.
EOF

Agent will use it automatically.

OpenClaw's modular skill system makes agents infinitely extensible.

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openclawskillsextensionsclawhub