skill-creator is agent-read markdown (skill) from openhands/extensions: This skill should be used when the user wants to "add a skill", "create a skill", "make a new skill", "write a new skill", "improve skill description", "organize skill content", or needs guidance on skill structure, progressive disclosure, or skill development best practices. Use this (not add-skill) when authoring a new skill from scratch rather than importing one from a GitHub URL..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Skill Creator
This skill provides guidance for creating effective skills.
Windows PowerShell equivalents for the Unix shell commands used in examples are in `references/windows.md`.
## About Skills
Skills are modular, self-contained packages that extend OpenHands's capabilities by providing
specialized knowledge, workflows, and tools. Think of them as "onboarding guides" for specific
domains or tasks—they transform OpenHands from a general-purpose agent into a specialized agent
equipped with procedural knowledge that no model can fully possess.
### What Skills Provide
1. Specialized workflows - Multi-step procedures for specific domains
2. Tool integrations - Instructions for working with specific file formats or APIs
3. Domain expertise - Company-specific knowledge, schemas, business logic
4. Bundled resources - Scripts, references, and assets for complex and repetitive tasks
### Anatomy of a Skill
Every skill consists of a required SKILL.md file and optional bundled resources:
```
skill-name/
├── SKILL.md (required)
│ ├── YAML frontmatter metadata (required)
│ │ ├── name: (required)
│ │ └── description: (required)
│ └── Markdown instructions (required)
…
Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
A 17 of 17 checks passed. Deterministic, no model, same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (20969 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
openhands/extensions · 150 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qcp7jmorli7heo4o
GET https://markdownregistry.com/api/v1/resolve?ref=openhands/extensions/skill-creator
GET https://markdownregistry.com/api/v1/blob/651c6a4db39a16d3a58ee4559ec52209aefc097f58bfa32dd4a24ba4f285fbb2
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
openhands/extensions · plugins/cobol-modernization/skills/build-setup/SKILL.md · Set up build environment and test fixtures for COBOL-to-Java migrations. Creates compilation infrastructure for both…
openhands/extensions · plugins/cobol-modernization/skills/mainframe-planning/SKILL.md · Create a transformation guide for replacing mainframe-specific COBOL constructs with standard COBOL equivalents. Use…
openhands/extensions · plugins/cobol-modernization/skills/to-java-migration/SKILL.md · Migrate COBOL code to idiomatic Java, preserving business logic while following Java best practices. Use for COBOL…
openhands/extensions · plugins/migration-scoring/skills/migration-mapping/SKILL.md · Create a mapping from source language files to target language files for code migrations. Use when evaluating or…
openhands/extensions · plugins/migration-scoring/skills/migration-report/SKILL.md · Generate a comprehensive migration report summarizing quality scores and providing recommendations. Use after scoring a…
openhands/extensions · plugins/migration-scoring/skills/score-quality/SKILL.md · Score code migration quality based on coverage and correctness. Evaluates how well target code represents source…
openhands/extensions · plugins/migration-scoring/skills/score-style/SKILL.md · Score migrated code against style guidelines and best practices. Evaluates code quality independent of functional…
anthropics/skills · skills/skill-creator/SKILL.md · Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a…
bytedance/deer-flow · skills/public/skill-creator/SKILL.md · Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a…
cherryhq/cherry-studio · resources/skills/skill-creator/SKILL.md · Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a…
volcengine/openviking · bot/workspace/skills/skill-creator/SKILL.md · Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
eigent-ai/eigent · resources/example-skills/skill-creator/SKILL.md · Guide for creating effective skills. Use when creating a new skill or updating an existing skill that extends agent…
thinkinaixyz/deepchat · resources/skills/skill-creator/SKILL.md · Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an…
