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[Enhancement proposal] Agentic summarization for Enterprise and Max customers

Status: Open.

#1018 In anthropics/anthropic-sdk-typescript;

· darthcoder opened on Apr 28, 2026

[Vertex] anthropic-beta header forwarded to countTokens fallback fails on lagging model backends

code-changeHand-written SDK code — fix directly in this repoHand-written SDK code — fix directly in this repo

Status: Open.

#1016 In anthropics/anthropic-sdk-typescript;

· this-fifo opened on Apr 27, 2026

feature request: expose thinking / output_config on Managed Agents request-side types

spec-changeStainless-generated code — fix in OpenAPI spec / Stainless configStainless-generated code — fix in OpenAPI spec / Stainless config

Status: Open.

#1012 In anthropics/anthropic-sdk-typescript;

· rluisr opened on Apr 24, 2026

TS2322: Type BetaRunnableTool<{}> is not assignable to type ToolUnion

code-changeHand-written SDK code — fix directly in this repoHand-written SDK code — fix directly in this repo

Status: Open.

#1010 In anthropics/anthropic-sdk-typescript;

· marc-wilson opened on Apr 23, 2026

perf(MessageStream): O(N²) complexity in text accumulation during structured output streaming

code-changeHand-written SDK code — fix directly in this repoHand-written SDK code — fix directly in this repo

Status: Open.

#995 In anthropics/anthropic-sdk-typescript;

· bilal-azam opened on Apr 12, 2026

partialParse in _vendor/partial-json-parser crashes on invalid JSON escape sequences from model output

code-changeHand-written SDK code — fix directly in this repoHand-written SDK code — fix directly in this repo

Status: Open.

#986 In anthropics/anthropic-sdk-typescript;

· HazAT opened on Apr 9, 2026

SDK strips directory paths from filenames in multipart uploads, breaking skills.versions.create()

spec-changeStainless-generated code — fix in OpenAPI spec / Stainless configStainless-generated code — fix in OpenAPI spec / Stainless config

Status: Open.

#968 In anthropics/anthropic-sdk-typescript;

· akhileshrangani4 opened on Mar 31, 2026

Bug: toolRunner does not propagate container.id across iterations, and setMessagesParams causes duplicate tool call loops

bugSomething isn't workingSomething isn't working

code-changeHand-written SDK code — fix directly in this repoHand-written SDK code — fix directly in this repo

Status: Open.

#964 In anthropics/anthropic-sdk-typescript;

· leonardomalzacher opened on Mar 30, 2026

Claude Opus 4.6 and Sonnet 4.6 fail to make parallel tool calls in Batch API

apiIssues pertaining to the underlying Anthropic API (not the SDK)Issues pertaining to the underlying Anthropic API (not the SDK)

Status: Open.

#956 In anthropics/anthropic-sdk-typescript;

· erangross27 opened on Mar 23, 2026

O(N²) performance bottleneck in [MessageStream](src/lib/MessageStream.ts#51-747) during structured output streaming

code-changeHand-written SDK code — fix directly in this repoHand-written SDK code — fix directly in this repo

Status: Open.

#933 In anthropics/anthropic-sdk-typescript;

· Emeenent14 opened on Mar 8, 2026

toBase64 stack overflow on large inputs (e.g. image uploads) in non-Node environments

code-changeHand-written SDK code — fix directly in this repoHand-written SDK code — fix directly in this repo

Status: Open.

#932 In anthropics/anthropic-sdk-typescript;

· Emeenent14 opened on Mar 8, 2026

Message Batches API CORS misconfiguration

apiIssues pertaining to the underlying Anthropic API (not the SDK)Issues pertaining to the underlying Anthropic API (not the SDK)

Status: Open.

#930 In anthropics/anthropic-sdk-typescript;

· Randomblock1 opened on Mar 8, 2026