Skill Developer

Meta-skill for creating new Claude Code skills, including skills that wrap MCP pipelines.

When to Use

• "Create a skill for X"

• "Help me make a new skill"

• "Turn this script into a skill"

• "How do I create a skill?"

Skill Structure

Skills live in .claude/skills/<skill-name>/:

.claude/skills/my-skill/

├── SKILL.md          # Required: Main skill definition

├── scripts/          # Optional: Supporting scripts

└── templates/        # Optional: Templates, examples

SKILL.md Format

---

name: skill-name

description: Brief description (shown in skill list)

allowed-tools: [Bash, Read, Write]  # Optional: restrict tools

---

# Skill Name

## When to Use

[When Claude should discover this skill]

## Instructions

[Step-by-step instructions for Claude to follow]

## Examples

[Usage examples]

Creating an MCP Pipeline Skill

To create a new MCP chain script and wrap it as a skill:

Step 1: Use the Template

Copy the multi-tool-pipeline template:

cp $CLAUDE_PROJECT_DIR/scripts/multi_tool_pipeline.py $CLAUDE_PROJECT_DIR/scripts/my_pipeline.py

Reference the template pattern:

cat $CLAUDE_PROJECT_DIR/.claude/skills/multi-tool-pipeline/SKILL.md

cat $CLAUDE_PROJECT_DIR/scripts/multi_tool_pipeline.py

Step 2: Customize the Script

Edit your new script to chain the MCP tools you need:

async def main():

    from runtime.mcp_client import call_mcp_tool

    args = parse_args()

    # Chain your MCP tools (serverName__toolName)

    result1 = await call_mcp_tool("server1__tool1", {"param": args.arg1})

    result2 = await call_mcp_tool("server2__tool2", {"input": result1})

    print(result2)

Step 2: Create the Skill

Create .claude/skills/my-pipeline/SKILL.md:

---

name: my-pipeline

description: What the pipeline does

allowed-tools: [Bash, Read]

---

# My Pipeline Skill

## When to Use

- [Trigger conditions]

## Instructions

Run the pipeline:

\`\`\`bash

uv run python -m runtime.harness scripts/my_pipeline.py --arg1 "value"

\`\`\`

### Parameters

- `--arg1`: Description

## MCP Servers Required

- server1: For tool1

- server2: For tool2

Step 3: Add Triggers (Optional)

Add to .claude/skills/skill-rules.json:

{

  "skills": {

    "my-pipeline": {

      "type": "domain",

      "enforcement": "suggest",

      "priority": "medium",

      "description": "What it does",

      "promptTriggers": {

        "keywords": ["keyword1", "keyword2"],

        "intentPatterns": ["(pattern).*?(match)"]

      }

    }

  }

}

Reference Files

For full details, read:

cat $CLAUDE_PROJECT_DIR/.claude/rules/skill-development.md

cat $CLAUDE_PROJECT_DIR/.claude/rules/mcp-scripts.md

Quick Checklist

• SKILL.md has frontmatter (name, description)

• "When to Use" section is clear

• Instructions are copy-paste ready

• MCP servers documented if needed

• Triggers added to skill-rules.json (optional)

Examples in This Repo

Look at existing skills for patterns:

ls $CLAUDE_PROJECT_DIR/.claude/skills/

cat $CLAUDE_PROJECT_DIR/.claude/skills/commit/SKILL.md

cat $CLAUDE_PROJECT_DIR/.claude/skills/firecrawl-scrape/SKILL.md