Backport: fix(amazon-bedrock): preserve empty text blocks when reasoning content is present#14189
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vercel-ai-sdk[bot] merged 1 commit intorelease-v6.0from Apr 7, 2026
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…t is present (#14175) ## Background #14071 bedrock's claude models can return assistant messages with empty text blocks sandwiched between reasoning blocks. their API strictly validates that when you replay assistant messages in conversation history, the content blocks must appear in the exact same order. AI SDK was dropping those empty text blocks ## Summary - Added a `hasReasoningBlocks` check so that empty text blocks are only skipped when the message does not contain reasoning blocks. When reasoning blocks are present, empty text blocks are preserved to maintain correct indices. - changed `if (part.text)` to `if (part.text != null)` : the old check silently dropped empty text blocks from the response before they ever entered the SDK's message history ## Manual Verification na ## Checklist - [x] Tests have been added / updated (for bug fixes / features) - [ ] 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) ## Related Issues fixes #14071
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Apr 7, 2026
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This is an automated backport of #14175 to the release-v6.0 branch. FYI @aayush-kapoor