skill-developer

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