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MCP Skills Author

Author AI agent skills as SKILL.md bundles — name, description, instructions, and referenced resources. Everything runs in your browser and is saved locally.

Skill Definition

Referenced resources (optional)

• name: name is required

• description: description is required

Rendered instructions appear here.

What is an MCP Skill?

An MCP Skill is a self-contained bundle that teaches an AI agent how to perform a task. The heart of the bundle is a SKILL.md file: a YAML frontmatter with a name and description, followed by a markdown body of instructions the agent follows when the skill is triggered. Larger skills reference extra files (scripts, templates, reference docs) that live alongside the SKILL.md.

This tool helps you author those bundles — it is not an MCP server and never connects to one.

The SKILL.md Format

Every skill file starts with frontmatter:

---
name: pdf-extractor
description: Extract text, tables, and metadata from PDF files and summarize the results.
---
 
# PDF Extractor
 
Use this skill when the user provides a PDF and wants its contents.
 
## Steps
1. Parse the document with a PDF library.
2. Extract text blocks and tables.
3. Return a structured summary.
  • name — a short, lowercase, kebab-case identifier (required)
  • description — a clear summary of what the skill does and when to use it (required)
  • instructions — the markdown body the agent reads (recommended)
  • resources — optional sibling files referenced from the instructions

Features

  • Live frontmatter validation — instantly see whether the required name and description are present and within limits
  • Live SKILL.md preview — watch the rendered file and the raw markdown update as you type
  • Referenced resources — list the extra files that belong to the bundle
  • One-click export — copy the SKILL.md to your clipboard or download it
  • Local-first — your draft is saved to your browser's localStorage; nothing is uploaded
  • Privacy-first — no account, no server, no tracking

How to Author a Skill

  1. Name it — pick a lowercase kebab-case identifier (e.g. pdf-extractor)
  2. Describe it — write a description that tells the agent when to trigger the skill
  3. Write instructions — explain the steps, with examples and edge cases
  4. Add resources — list any sibling files the instructions reference
  5. Validate & export — confirm the frontmatter is valid, then copy or download the SKILL.md

Why Use a Local-First Authoring Tool?

  • No account required — open the page and start writing
  • Private by design — your drafts never leave your browser
  • Fast feedback — validation and preview update on every keystroke
  • Portable output — the exported SKILL.md works with any skill-compatible agent directory

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