@anthropic-ai/sdk

Features

• api: add org webhook endpoints and user profile enforcement events

Features

• api: add data_refreshed_at and has_more to analytics report pages

• api: add workspace rate-limit updates to the Admin API

• api: make User Profiles generally available

• client: yield server-sent events with unrecognized event names

• tools: accept every tool definition field in the tool helpers

Bug Fixes

• client: treat x-amz-security-token as a sensitive header

• tools: keep $ sequences literal in memory tool str_replace

Features

• api: add between_tools to thinking types in model capabilities

• api: add the speed parameter and usage.speed to Messages

• api: return a Console organization's usage-tier spend cap as a read-only spend limit

Bug Fixes

• client: close streams dropped without being read to the end

• client: keep an unread JSONL response open while it is held

Chores

• breaking

  ci: speed up breaking change detection

Features

• api: add execution_identity to Managed Agents agents

• api: add organization_type_not_supported error to spend limit lists

• api: add telemetry destination test endpoint

• api: add telemetry destinations to the Admin API

• client: add native support for OpenTelemetry tracing

  If your app registers a global tracer provider, the SDK will create spans with it after upgrading, and they'll be exported with the rest of your traces. Requests will also get trace context headers from the global propagator. To disable, pass openTelemetry: false to the client or set ANTHROPIC_OPEN_TELEMETRY=false. Learn more in the documentation.

Bug Fixes

• api: rename telemetry destination test response model

• client: close an unread stream that was dropped while tracing is on

• client: don't follow redirects on token requests

• client: treat proxy-authorization as a sensitive header

Bug Fixes

• streaming: tolerate unknown event types in MessageStream and BetaMessageStream

• streaming: stop throwing "Unexpected event order" for an event before message_start

• streaming: yield events that arrive before message_start when iterating MessageStream and BetaMessageStream

Features

• api: add types for the Chat and Cowork unified analytics metrics

• api: add workflows, multiagent configuration and thread status filtering to Managed Agents

Bug Fixes

• client: throw before sending a request with an empty path parameter

Features

• api: add claude-haiku-5-5 and typed computer and browser toolset tool calls

• api: add disabled to thinking types in model capabilities

• deprecated

  api: add display_name to RBAC roles and deprecate name

• api: add include_default parameter to list workspaces

• api: add lifecycle stage fields and filter to /v1/models

• api: add line to model objects

• api: add url_sources to the Managed Agents web_fetch tool config

• api: add web search and code execution support to model capabilities

Bug Fixes

• api: send the beta header by default when listing spend limits

• client: throw when a JSONL stream is iterated twice

• tools: keep a local edit made after a memory upload whose response was lost

Features

• api: add a refusal stop reason and stop_details to Managed Agents session idle events

• api: add Claude Enterprise analytics, spend limits, and RBAC groups and roles to the Admin API

• api: add per-user usage and cost reports to the Admin API analytics

• api: add Plugins and Plugin Marketplaces to the Admin API

• api: add repository error types to Managed Agents session errors

• api: allow removing a plugin's org-wide installation setting

• api: MCP tunnels beta: add read-only transport object to Tunnel and return the one-time relay token in the create response

• api: Organization API endpoints are now GA

Bug Fixes

• api: make memory store description, metadata, archived_at required

• api: type admin plugin preference and marketplace fields as enums

• pagination: auto-paging continues past an empty page while next_page is set

• tool-runner: only send API fields for runnable tools

• tools: stop the session tool runner after any idle that ends the turn

Features

• api: add between_tools thinking type

• api: add claude-sonnet-5-5

• api: add ClientToolUnion type for client-executed tools

• api: add include_inherited and source to workspace rate limits

• api: add typed event type values to the Managed Agents events list filter

• api: cache diagnostics GA — diagnostics on Message / MessageCreateParams

• tools: optionally start tool calls while the reply streams

Bug Fixes

• client: also send X-Stainless-Timeout for client-level timeouts

• client: send upload filenames as given, with no placeholder

• helpers: degrade between_tools thinking to disabled on fallback hops

• internal: let bundlers drop unused classes with more than ten private-member assignments

• streaming: show every complete array item and hold back unfinished numbers in partial tool input

Performance Improvements

• streaming: drop the redundant iterSSEChunks layer

• streaming: take each string token as one slice in the partial JSON tokenizer

Chores

• deprecated

  api: deprecate the betas param on GA models and completions methods

Features

• api: add support for claude-opus-5-5, inline tool definitions and MCP tool-list pinning (beta)

Bug Fixes

• api: share one evaluated_permission enum across Managed Agents events

• tools: addTools() takes effect straight away

• tools: leave reply-only params off the tool runner's compaction request

Features

• api: add group with display_name to rate limits, deprecate group_type

• tools: add compactBeforeNextTurn() to the tool runner

Bug Fixes

• BetaMessageStream: stop coercing a null compaction_delta content into "null"

• client: don't retry requests whose body is a stream or iterator

• client: join multiple anthropic-beta values with a comma and no space

• client: make pagination exports on the client namespace type-only

• internal: drop jest from tsconfig types

• middleware: echo a streamed compaction summary in the fallback continuation

• tools: keep $defs when transformJSONSchema root is a $ref

Performance Improvements

• client: skip formatting request details when debug logging is off

Features

• api: add auto mode tool permissions for Managed Agents

• api: add compaction parameter and signed compaction blocks (beta)

• api: add enum types for workspace data-residency geo fields

• api: add thinking_mismatch_allowed entries to input_transformations (beta)

• api: add url_sources to the web fetch tool

• api: add workspace_id parameter to user profiles methods

Bug Fixes

• api: mark usage iteration model as nullable

• api: use one input transformation type for message and delta event

• client: ignore invalid Retry-After values and validate maxRetries

• client: retry connection errors in the async client and stop blocking in the coroutine retry loop

• client: stop waiting for a retry as soon as the request is aborted

• client: use the default backoff when Retry-After is out of range

• internal: stop a declaration file using a type that needs TypeScript 5.7

Performance Improvements

• add "sideEffects": false so bundlers can drop unused modules

• mark classes as pure so bundlers can drop unused ones

Features

• api: add auto mode tool permissions for Managed Agents

• api: add content_too_large web_fetch tool error code

• api: add the user-profiles-2026-09-04 beta value and external_user_details to user profiles

• api: support mounting public GitHub repositories without an authorization_token in Managed Agents sessions

Features

• api: add Claude Tag category and user breakdowns to usage reports

• api: add named types for organization compliance settings state

• api: add support for sending a workspace ID on more endpoints

Bug Fixes

• repair custom-code merge in messages resources

• tools: create agent-toolset files and directories owner-only

Features

• api: beta user profiles: add external_user_onboarded_at, remove relationship in favor of access_type

• api: manual updates

• api: organization compliance settings, user-profile order_by, memory-store and toolset schema updates

Bug Fixes

• keep credential file access out of non-Node bundles

Features

• api: beta files/skills namespaces use GA shapes; drop dated beta header pins

Bug Fixes

• client: classify cross-realm DOMException abort/timeout errors correctly

• client: use configured logger for SSE parse errors

• sessions: make event accumulator forward-compatible with new event types

• tools: let read return a view_range of a file over the size cap

• uploads: default bare Blob filename on skills endpoints

• webhooks: require headers to be passed to unwrap()

Features

• api: add updates thinking display mode (beta)

• api: add missing anthropic-beta values

• api: add support for Organization API endpoints

• helpers: support Standard Schema for structured outputs and tools

Bug Fixes

• tools: keep the tool runner going on pause_turn

• types: don't reference NodeJS.ProcessEnv from published types

Features

• api: managed agents web search config and self hosted sandbox memory

Features

• api: additions to files and memory stores

• api: updates to skill, files, and user profiles

• client: add helpers for accessing the workspace ID in response headers

Bug Fixes

• api: remove unsupported mid_conv_system content block

• session-runner: retry tool-result sends for at least the lease TTL

Features

• api: add mid-conversation-tool-changes-2026-07-01 beta

• api: add support for session budgets, advisor tool, pinned inference location and skills auto-loading from GitHub

• tools: make bash timeout and abort errors matchable by class

Bug Fixes

• client: use hardcoded User-Agent strings instead of constructor names