fix(aws): normalize Bedrock reasoning blocks#11200
Merged
Merged
Conversation
🦋 Changeset detectedLatest commit: 7894e35 The changes in this PR will be included in the next version bump. This PR includes changesets to release 2 packages
Not sure what this means? Click here to learn what changesets are. Click here if you're a maintainer who wants to add another changeset to this PR |
![open-swe[bot]](https://avatars.githubusercontent.com/in/1395372?s=60&v=4){kind=small}
Jacob Lee (jacoblee93)
previously approved these changes
Jul 14, 2026
| block.type === "reasoning_content" | ||
| ) { | ||
| const reasoningContent = | ||
| langchainReasoningBlockToBedrockReasoningBlock(block); |
Hunter Lovell (hntrl)
pushed a commit
that referenced
this pull request
Jul 14, 2026
This PR was opened by the [Changesets release](https://github.com/changesets/action) GitHub action. When you're ready to do a release, you can merge this and the packages will be published to npm automatically. If you're not ready to do a release yet, that's fine, whenever you add more changesets to main, this PR will be updated. # Releases ## @langchain/core@1.2.3 ### Patch Changes - [#11200](#11200) [`08e5888`](08e5888) Thanks [@hntrl](https://github.com/hntrl)! - fix(aws): normalize and safely replay Bedrock reasoning blocks Emit standard reasoning blocks with preserved signatures, omit incomplete signature-only reasoning during replay, and retain compatibility with legacy and redacted Bedrock reasoning. ## @langchain/aws@1.4.3 ### Patch Changes - [#11200](#11200) [`08e5888`](08e5888) Thanks [@hntrl](https://github.com/hntrl)! - fix(aws): normalize and safely replay Bedrock reasoning blocks Emit standard reasoning blocks with preserved signatures, omit incomplete signature-only reasoning during replay, and retain compatibility with legacy and redacted Bedrock reasoning. Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Normalize Bedrock Converse reasoning into LangChain's standard reasoning block shape by default, including opaque signatures and streaming block indexes. Prevent incomplete signature-only reasoning from being replayed as an invalid Bedrock
reasoningTextblock while preserving tool calls and compatibility with persisted provider-native content.Changes
@langchain/aws{ type: "reasoning", reasoning, signature }for ordinary Bedrock reasoning without requiringoutput_version: "v1".non_standardwrappers, and redacted reasoning.@langchain/core