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SKILL verified MIT Self-run

Skill Creation Guide

skill-gmh5225-awesome-skills-skill-creation · by gmh5225

Guide for creating Agent Skills: structure, best practices, and SKILL.md format for Claude Code, Codex, Gemini CLI, and other AI agents.

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Install

$ agentstack add skill-gmh5225-awesome-skills-skill-creation

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

Verified badge

Passed review? Show it. Paste this badge into your README, it links to the public security report.

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[![AgentStack Verified](https://agentstack.voostack.com/badges/verified.svg)](https://agentstack.voostack.com/security/report/skill-gmh5225-awesome-skills-skill-creation)

Reliability & compatibility

✓ Security review passed
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● 2mo ago

Declared compatibility

Claude CodeClaude Desktop

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.

How agent discovery & health will work →
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About

Skill Creation Guide

Scope

Use this skill when:

  • Creating new Agent Skills
  • Understanding SKILL.md format and conventions
  • Learning best practices for skill authoring

Skill Structure

skill-name/
├── SKILL.md          # Required: Instructions and metadata
├── scripts/          # Optional: Helper scripts
├── templates/        # Optional: Document templates
└── resources/        # Optional: Reference files

SKILL.md Format

Required Frontmatter

---
name: my-skill-name
description: A clear description of what this skill does and when to use it.
---

Body Structure

# Skill Name

Detailed description of the skill's purpose.

## When to Use This Skill

- Use case 1
- Use case 2

## Instructions

[Detailed instructions for the agent]

## Examples

[Real-world examples]

Best Practices

  1. Keep descriptions exhaustive: The frontmatter description helps agents decide when to trigger the skill.
  2. Focus on execution: The body should contain clear, actionable steps.
  3. Use progressive disclosure: Put detailed references in references/ folder.
  4. Include scripts for automation: Use helper scripts for deterministic operations.
  5. Keep SKILL.md under 500 lines: For optimal performance.
  6. Test across platforms: Verify skills work with Claude Code, Codex, etc.

Token Efficiency

Skills employ progressive disclosure architecture:

  1. Metadata loading (~100 tokens): Agent scans available skills
  2. Full instructions (<5k tokens): Load when skill is activated
  3. Bundled resources: Only load as needed

Platform-Specific Paths

| Platform | Project Path | Global Path | |----------|--------------|-------------| | Claude Code | .claude/skills/ | ~/.claude/skills/ | | Codex | .codex/skills/ | ~/.codex/skills/ | | Cursor | .cursor/skills/ | ~/.cursor/skills/ | | Gemini CLI | .gemini/skills/ | ~/.gemini/skills/ | | GitHub Copilot | .github/skills/ | ~/.copilot/skills/ |

Quality Checklist

  • [ ] Clear, actionable instructions
  • [ ] Includes real-world examples
  • [ ] Written for AI agents, not end users
  • [ ] Documents prerequisites and dependencies
  • [ ] Includes error handling guidance
  • [ ] Tested on target platform(s)

Full Resource List

For more detailed skill creation resources, complete link lists, or the latest information, use WebFetch to retrieve the full README.md:

https://raw.githubusercontent.com/gmh5225/awesome-skills/refs/heads/main/README.md

The README.md contains the complete categorized resource list with all links.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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