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Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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agents-and-tools/agent-skills/overview Changed · +1 / -5 lines

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 The Claude API supports both pre-built Agent Skills and custom Skills. Both work identically: specify the relevant `skill_id` in the `container` parameter along with the [code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool).
 
-**Prerequisites:** Using Skills through the API requires the [code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool), whose container Skills run in, and one beta header:
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-* `skills-2025-10-02` - Enables Skills functionality
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-Add a second header, `files-api-2025-04-14`, when you use the [Files API](https://platform.claude.com/docs/en/build-with-claude/files) to upload input files to the container or download files a Skill produces.
+**Prerequisites:** Using Skills through the API requires the [code execution tool](https://platform.claude.com/docs/en/agents-and-tools/tool-use/code-execution-tool), whose container Skills run in. On the Claude API, neither the Skills API nor the `container.skills` parameter requires a beta header, and requests that still send `skills-2025-10-02` continue to work.
 
 Use pre-built Agent Skills by referencing their `skill_id` (`pptx`, `xlsx`, `docx`, or `pdf`), or create and upload your own through the Skills API (`/v1/skills` endpoints). Custom Skills are shared workspace-wide: all workspace members can access them.