Backport: fix(amazon-bedrock): drop foreign-provider reasoning blocks instead of sending them unsigned#14882
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gr2m merged 2 commits intorelease-v6.0from Apr 30, 2026
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…f sending them unsigned (#14765) ## Background When a conversation contains reasoning blocks signed by a different provider (e.g. Anthropic-signed reasoning replayed through Bedrock during cross-provider fallback), the converter pushes the reasoning text without a signature, and Bedrock's converse API rejects the request with: messages.N.content.M.thinking.signature: Field required `@ai-sdk/anthropic` already handles the symmetric case gracefully — it drops unrecognized reasoning metadata and emits a warning. ## Fix In the `case 'reasoning'` branch of `convertToBedrockChatMessages`, only fall through to the unsigned-reasoning push when `providerOptions` is empty or contains exclusively the `bedrock` key. Foreign-provider metadata (e.g. `anthropic`) causes the block to be dropped instead. This preserves the existing prefill behavior introduced in #13972 while fixing the cross-provider replay case. ## Repro A conversation that has assistant turns with `providerOptions.anthropic` on its reasoning parts, sent through `bedrock(...).doStream(...)`, currently reproduces the validation error. The added test covers this. After gh pr create runs, it'll print the PR URL. CI will run automatically; the CLA bot will comment with a sign link if you haven't signed before. Co-authored-by: asdf <asdfsdf>
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Two new tests called the non-existent `convertToAmazonBedrockChatMessages` and one used `providerOptions.amazonBedrock` (which the source does not parse for signatures), so both failed at runtime. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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This is an automated backport of #14765 to the release-v6.0 branch. FYI @thestonechat