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Anthropic SDK release notes, breaking changes, and upgrade notes.

Official TypeScript SDK for the Anthropic API StackPulse turns upstream changelogs into scannable summaries with risky changes, deprecations, migration notes, and source links.

releases
11
breaking
1
security
0
deprecated
0
migrations
0

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what stackpulse tracks

Anthropic SDK releases from GitHub

StackPulse watches Anthropic SDK release notes and keeps the original source link close to every summary.

upgrade risk

Breaking changes and deprecations

Risky changes are separated from normal feature notes so you can scan upgrade impact before changing production dependencies.

migration notes

Source-backed next steps

Migration steps and recommended actions are only shown when the upstream release notes support them.

# latest_releases

source-backed
sdk-v0.106.0mediumfeatureJun 24, 2026

sdk: v0.106.0

Added support for system.message streaming events and fixed helper middleware issues. The release also includes minor API updates for refusal categories and user profile IDs.

affected

Users who need streaming events for system.message will benefit from this update.

action

Update to the latest version to utilize new streaming event features.

release_signals
+Add support for system.message streaming events
view source on github->
aws-sdk-v0.5.0mediumfeatureJun 18, 2026

aws-sdk: v0.5.0

This release introduces lazy parsing of partial tool JSON input in the stream functionality and removes the use of deprecated models in tests.

affected

Developers using the stream functionality with partial tool JSON input are affected.

action

Update to version 0.5.0 to benefit from the new lazy parsing feature.

release_signals
+Lazily parse partial tool JSON input in the stream functionality
view source on github->
foundry-sdk-v0.4.0mediumfeatureJun 18, 2026

foundry-sdk: v0.4.0

This release introduces lazy parsing for partial tool JSON input in the stream functionality.

release_signals
+Lazily parse partial tool JSON input in stream functionality
view source on github->
bedrock-sdk-v0.31.0mediumfeatureJun 18, 2026

bedrock-sdk: v0.31.0

This release introduces lazy parsing of partial tool JSON input in streams and removes deprecated models from tests.

affected

Users working with streaming data containing partial tool JSON inputs will benefit from improved parsing efficiency.

release_signals
+Lazily parse partial tool JSON input in streams for improved efficiency
view source on github->
vertex-sdk-v0.18.0mediumfeatureJun 18, 2026

vertex-sdk: v0.18.0

Added lazy parsing for partial tool JSON input and stopped using deprecated models in tests.

affected

Developers using stream parsing of partial tool JSON inputs will benefit from improved performance.

action

Update to take advantage of lazy JSON parsing improvements.

release_signals
+Stream: lazily parse partial tool json input
view source on github->
sdk-v0.105.0mediumfeatureJun 18, 2026

sdk: v0.105.0

This release adds support for a new code execution tool and improves streaming functionality by implementing lazy parsing of partial tool JSON.

affected

Users requiring code execution capabilities via the new tool or those using streaming with partial JSON will be affected.

action

Update to utilize the new code_execution_20260120 tool and benefit from improved stream parsing.

release_signals
+Added support for the new code_execution_20260120 tool
+Implemented lazy parsing of partial tool JSON input for streams
view source on github->
sdk-v0.104.2mediumbreakingJun 15, 2026

sdk: v0.104.2

This release focuses on removing retired models from the API and SDKs as part of maintenance and cleanup.

affected

Applications using retired models will be affected and may need to update their dependencies.

action

Update your application to remove dependencies on retired models.

release_signals
-Removed retired models from the API and SDKs, which may affect applications relying on these models.
view source on github->
sdk-v0.104.1lowfeatureJun 9, 2026

sdk: v0.104.1

This release introduces a bug fix related to the API, specifically adding a new refusal category for `frontier_llm`.

affected

Users relying on the API's refusal categorization may be affected by this change.

action

Update to version 0.104.1 to ensure proper handling of the `frontier_llm` refusal category.

view source on github->
sdk-v0.104.0highfeatureJun 9, 2026

sdk: v0.104.0

This release introduces support for Managed Agents deployments and environment variable credentials, enhancing the SDK's flexibility and integration capabilities.

affected

Developers using the SDK for Managed Agents deployments or requiring environment variable-based authentication will benefit from this update.

action

Update to version 0.104.0 to utilize the new Managed Agents and environment variable credentials features.

release_signals
+Add support for Managed Agents deployments
+Add environment variable credentials
view source on github->
vertex-sdk-v0.17.1lowfeatureJun 9, 2026

vertex-sdk: v0.17.1

This release focuses on fixing a bug related to third-party middleware ordering in the client.

affected

Users relying on third-party middleware ordering in the client are affected.

action

Update to version 0.17.1 to ensure proper middleware ordering.

view source on github->
sdk-v0.103.0highfeatureJun 9, 2026

sdk: v0.103.0

This release introduces support for new Claude models and enhances fallback mechanisms for API providers, along with middleware improvements.

affected

Developers using the SDK for Claude models or requiring fallback mechanisms will be affected.

action

Update to version 0.103.0 to utilize new features and improvements.

release_signals
+Add support for claude-mythos-5 and claude-fable-5 with server-side fallbacks on refusal
+Introduce client-side fallbacks middleware for API providers lacking server-side fallbacks
+Add ctx.logger to middleware for enhanced logging capabilities
view source on github->
Anthropic SDK release notes, breaking changes, and upgrade notes · StackPulse