Source Intelligence
Sweep 28 Aug 2026 · 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.

One change

overview

build-with-claude/overview

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Nearest release: v2.1.237, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

build-with-claude/overview Changed · +4 / -4 lines

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 | Feature                                                                                                                  | Description                                                                                                                                                                                                           | ZDR              | Availability                                                                   |
 | ------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------- | ------------------------------------------------------------------------------ |
-| [Agent Skills](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview)                               | Extend Claude's capabilities with Skills. Use pre-built Skills (PowerPoint, Excel, Word, PDF) or create custom Skills with instructions and scripts. Skills use progressive disclosure to efficiently manage context. | Not ZDR eligible | <PlatformAvailability claudeApiBeta claudePlatformAwsBeta azureAiBeta />†      |
+| [Agent Skills](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview)                               | Extend Claude's capabilities with Skills. Use pre-built Skills (PowerPoint, Excel, Word, PDF) or create custom Skills with instructions and scripts. Skills use progressive disclosure to efficiently manage context. | Not ZDR eligible | <PlatformAvailability claudeApi claudePlatformAwsBeta azureAiBeta />†          |
 | [Fine-grained tool streaming](https://platform.claude.com/docs/en/agents-and-tools/tool-use/fine-grained-tool-streaming) | Stream tool use parameters without buffering/JSON validation, reducing latency for receiving large parameters.                                                                                                        | ZDR eligible     | <PlatformAvailability claudeApi claudePlatformAws bedrock vertexAi azureAi />  |
 | [MCP connector](https://platform.claude.com/docs/en/agents-and-tools/mcp-connector)                                      | Connect to remote [MCP](https://platform.claude.com/docs/en/mcp) servers directly from the Messages API without a separate MCP client.                                                                                | Not ZDR eligible | <PlatformAvailability claudeApiBeta claudePlatformAwsBeta azureAiBeta />†      |
 | [Programmatic tool calling](https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling)     | Enable Claude to call your tools programmatically from within code execution containers, reducing latency and token consumption for multi-tool workflows.                                                             | Not ZDR eligible | <PlatformAvailability claudeApi claudePlatformAws azureAi />†                  |
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 Manage files and assets for use with Claude.
 
-| Feature                                                                  | Description                                                                                                                       | ZDR              | Availability                                                              |
-| ------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------- | ---------------- | ------------------------------------------------------------------------- |
-| [Files API](https://platform.claude.com/docs/en/build-with-claude/files) | Upload and manage files to use with Claude without re-uploading content with each request. Supports PDFs, images, and text files. | Not ZDR eligible | <PlatformAvailability claudeApiBeta claudePlatformAwsBeta azureAiBeta />† |
+| Feature                                                                  | Description                                                                                                                       | ZDR              | Availability                                                          |
+| ------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------- | ---------------- | --------------------------------------------------------------------- |
+| [Files API](https://platform.claude.com/docs/en/build-with-claude/files) | Upload and manage files to use with Claude without re-uploading content with each request. Supports PDFs, images, and text files. | Not ZDR eligible | <PlatformAvailability claudeApi claudePlatformAwsBeta azureAiBeta />† |
 
 \* **Structured outputs:** Your prompts and Claude's outputs are not stored. Only JSON schemas are cached, for up to 24 hours since last use. **Web search and web fetch:** ZDR-eligible except when [dynamic filtering](https://platform.claude.com/docs/en/agents-and-tools/tool-use/web-search-tool#dynamic-filtering) is enabled. **Fallback credit and server-side fallback:** The features retain no message content, but both handle refusals from Claude Fable 5, which [is not available under ZDR](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). See [ZDR details](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#feature-eligibility).