agentskills.io is an open standard for portable, shareable Markdown skill documents — YAML frontmatter plus body — that AI agents like 📝Hermes Agent implement and contribute to.
A skill document is a single Markdown file with structured YAML frontmatter — name, description, version, supported platforms, optional metadata — followed by a procedural body that captures how to perform a task, the pitfalls to avoid, and the verification steps that confirm the work is complete. The format is deliberately minimal: any agent runtime that can read Markdown and parse YAML can load a skill, and any human can audit one.
The standard's goal is portability. A skill written for one agent runs unmodified on any other that implements agentskills.io, so a procedure refined in production by one team becomes reusable across the broader agent ecosystem. The agentskills.io domain hosts both the specification and a community marketplace where teams publish skills under the standard.
Hermes generates agentskills.io-compliant skills autonomously after complex tasks — typically five or more tool calls — and patches them in place during use, a self-improving variant the broader standard accommodates but does not require. Nous Research positions agentskills.io adoption as a coordination layer for the agent ecosystem: a shared procedural lexicon that compounds in value as more runtimes implement it.