Backport: feat (provider/anthropic): support passing metadata.user_id#13783
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vercel-ai-sdk[bot] merged 1 commit intorelease-v6.0from Mar 24, 2026
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## Background The Anthropic API supports passing metadata with requests, including a `user_id` field for tracking end-users. This feature was not previously supported in the AI SDK's Anthropic provider. ## Changes Added support for passing `metadata.userId` to Anthropic models across all providers (direct Anthropic, Amazon Bedrock, and Google Vertex). The `userId` field is mapped to the Anthropic API's `user_id` parameter and should contain an external identifier like a UUID or hash value without PII. ## Manual Verification Created and tested an example that demonstrates passing metadata with a user ID to the Anthropic provider. The metadata is correctly transformed from camelCase `userId` to snake_case `user_id` in the API request. ## Checklist - [x] Tests have been added / updated (for bug fixes / features) - [x] Documentation has been added / updated (for bug fixes / features) - [x] A _patch_ changeset for relevant packages has been added (for bug fixes / features - run `pnpm changeset` in the project root) - [x] I have reviewed this pull request (self-review)
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…ta.user_id (#13785) This is an automated backport of #13783 to the release-v5.0 branch. FYI @vercel-ai-sdk[bot] This backport has conflicts that need to be resolved manually. ### `git cherry-pick` output ``` Auto-merging content/providers/01-ai-sdk-providers/05-anthropic.mdx Auto-merging content/providers/01-ai-sdk-providers/08-amazon-bedrock.mdx Auto-merging content/providers/01-ai-sdk-providers/16-google-vertex.mdx CONFLICT (file location): examples/ai-functions/src/generate-text/anthropic/metadata.ts added in 05b8ca2 (Backport: feat (provider/anthropic): support passing metadata.user_id (#13783)) inside a directory that was renamed in HEAD, suggesting it should perhaps be moved to examples/ai-core/src/generate-text/metadata.ts. Auto-merging packages/anthropic/src/anthropic-messages-language-model.test.ts Auto-merging packages/anthropic/src/anthropic-messages-language-model.ts Auto-merging packages/anthropic/src/anthropic-messages-options.ts CONFLICT (content): Merge conflict in packages/anthropic/src/anthropic-messages-options.ts error: could not apply 05b8ca2... Backport: feat (provider/anthropic): support passing metadata.user_id (#13783) hint: After resolving the conflicts, mark them with hint: "git add/rm <pathspec>", then run hint: "git cherry-pick --continue". hint: You can instead skip this commit with "git cherry-pick --skip". hint: To abort and get back to the state before "git cherry-pick", hint: run "git cherry-pick --abort". hint: Disable this message with "git config set advice.mergeConflict false" ``` --------- Co-authored-by: vercel-ai-sdk[bot] <225926702+vercel-ai-sdk[bot]@users.noreply.github.com> Co-authored-by: Walter Korman <shaper@vercel.com>
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This is an automated backport of #13782 to the release-v6.0 branch. FYI @shaper