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Agent Skills

Open folder format (a SKILL.md plus optional scripts and files) for packaging instructions an agent loads on demand.

Reference by Originally developed by Anthropic, released as an open standard

IndexedApache-2.0★ 26,562
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About

Defines the SKILL.md file with name and description metadata and the progressive-disclosure loading model that compatible agents follow.

Use cases: prompt-engineering

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About the protocol

Maintainer
Originally developed by Anthropic, released as an open standardagentskills.io
Governance
Agentic AI Foundation (Linux Foundation) projectaaif.io
Launched
2025-10-16anthropic.com
  • Published as an open standard for cross-platform use on 2025-12-18. anthropic.com
  • Client showcase lists Claude Code, Codex, Gemini CLI, GitHub Copilot, Cursor, goose and others. agentskills.io

Listings that use it

124,017 visible listings declare Agent Skills: 123,917 skills, 83 agents, 17 harnesses & sdks.

Signals

Stars
26,562
Forks
1,955
Open issues
49
Contributors
42
Last commit
Aug 9, 2026 (2 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License
Apache-2.0
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Cite this page

Agent Skills. Agent Mart. https://agentmart.dev/reference/agent-skills (last updated 2026-10-24)