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Agent Skills and the Skills API are out of beta on the Claude API

GAVerifiedAdded Sep 22, 2026

Agent Skills and /v1/skills no longer require the skills-2025-10-02 beta header, including Messages requests that load Skills via the container parameter. Requests still sending the header continue to work unchanged.

Read Anthropic's release notes

https://platform.claude.com/docs/en/release-notes/overview#august-19-2026

Summaries of vendors' own notes. Product names and logos belong to their owners; logos via logo.dev.

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