Anthropic donates Agent Skills to the Agentic AI Foundation

Background

Anthropic developed Agent Skills while working on Claude Code. The company's stated reason was that the tool lacked procedural knowledge for real business tasks ^[1]. A model can reason about a problem in general terms and still not know how a particular organisation files a report, checks a dataset or runs a release. Procedural knowledge of that kind is usually written down somewhere inside an organisation, but it is not written in a form a model can pick up and follow.

Skills were Anthropic's answer to that gap: a way to hand an agent a written procedure and the files that go with it, rather than hoping the procedure is implied by the prompt.

The handover

On 22 October 2026 Anthropic donated the Agent Skills open standard to the Agentic AI Foundation (AAIF) ^[1]. The donation was not just a licence change. It included the name and the logo, the GitHub organisation that hosts the standard's repositories, and the agentskills.io domain ^[1]. Handing over the name and the address where people find the specification is what makes a standard something another organisation can carry forward; keeping those while giving away only the text would leave the original owner in control in practice.

What a skill actually is

A skill is a folder. It contains a SKILL.md file, plus any scripts or reference material the skill needs ^[1]. That is the whole shape of the format: no compiler, no service to sign up for, no special runtime. Because the unit is a folder, a skill can be copied, versioned, reviewed and shared like any other directory of files, and the scripts inside it are the same scripts an engineer would have written anyway.

The foundation

The AAIF is a Linux Foundation project, co-founded by Anthropic, Block and OpenAI ^[1]. It was already hosting MCP before Agent Skills arrived ^[1]. Placing a standard inside a foundation is a common way to signal that no single company holds the switch: the project has its own governance, and competitors can sit on the same footing as the founder. The fact that the AAIF already carried another agent protocol meant Agent Skills did not arrive in an empty room — it joined an organisation that had already been set up to hold shared agent infrastructure.

Adoption before the donation

By the time of the handover, more than 70 agent platforms had integrated Agent Skills, including ChatGPT, Cursor, GitHub Copilot and VS Code ^[1]. Products from several different companies, some of them direct competitors, were reading the same folder format.

Usage numbers were also reported alongside the donation: 1 million skills had been published, and they had been installed nearly 280 million times ^[1]. Those figures describe a format that had already spread beyond the place it was invented, which is generally the point at which a proprietary format becomes a coordination problem and an open standard becomes the cheaper option.

Who maintains it now

The standard will be maintained by engineers from Anthropic, Google, OpenAI and other companies, acting as individuals ^[1]. The lead maintainers for Agent Skills at the Agentic AI Foundation are David Soria Parra and Mahesh Murag ^[1].

Participation is not gated. Users can keep using or contributing to the Agent Skills standard without joining the Agentic AI Foundation ^[1], so the practical work of writing skills, filing issues and improving the specification stays open to anyone who wants to do it.

Why it matters

A skill format only pays off if everyone reads the same one. If each agent platform defined its own folder layout and its own metadata file, anyone writing procedures for agents would have to write them once per platform, and the material would drift apart. Moving the specification, the name and the domain into a foundation with multiple corporate founders is a structural answer to that problem: it makes the format harder for any one vendor to change unilaterally, and it lets rivals build on it without formally depending on a competitor.