Features

• api: add Claude Tag metrics to the analytics summaries and users reports
• api: add reply_mode to Claude Tag Slack channel settings

Bug Fixes

• bedrock: send ";" in a model ID as is, and refuse a model ID whose part before the first ";" is empty, "." or ".."
• google-cloud: percent-encode the project, location and workspace ID in the workspace and organization base URL paths
• google-cloud: refuse an empty project, location or workspace ID that would be written into a derived base URL
• vertex: refuse an empty model, project ID or region instead of writing it into the request path
• vertex: send ";" in the model as %3B in the request path

Chores

• docs: clarify display_name for RBAC Roles created by Anthropic
• docs: clarify plugin delete and skill name conflict descriptions
• docs: clarify when to omit user_profile_id on external keys
• docs: note that Claude Tag settings accept self-hosted runner pools
• internal: make three timing tests tolerate slow test machines
• internal: remove a redundant import from the message types

Documentation

• examples: show multiagent when creating a Managed Agents agent

Features

• api: accept user_profile.program_status_updated on organization webhook endpoints
• api: add claude-fable-5-2 and claude-mythos-5-2
• api: add parent organization filtering and grouping to the usage and cost reports
• api: add the sandbox_egress_restricted error to Admin API write methods
• api: add the user_profile.program_status_updated webhook event

Bug Fixes

• bedrock,vertex: add the parse and count_tokens methods missing from beta.messages.with_raw_response and with_streaming_response
• bedrock,vertex: send the X-Stainless-Async header and stream raw requests that name no stream class
• bedrock: sign requests that have no Connection header instead of raising KeyError
• bedrock: write a list in a query as a[]=1&a[]=2 on the Bedrock Mantle clients, as Anthropic does
• client: allow API errors to be unpickled and copied
• client: read ANTHROPIC_CUSTOM_HEADERS on the Bedrock, Bedrock Mantle and Vertex clients
• foundry: stop copy, with_options and with_middleware from raising when ANTHROPIC_FOUNDRY_RESOURCE is set
• parse: keep const in structured output schemas, and drop type beside const and enum

Chores

• api: remove some error detail types and update descriptions
• docs: say when a work heartbeat does not compare its value
• internal: add this repository's review rules
• internal: remove two comments from the error classes

Features

• api: add error code for ramp limit errors
• api: add error codes for External Key validation failures
• api: add support for signing organization members out everywhere

Bug Fixes

• bedrock,vertex: raise error-code and status exception classes on platform clients
• bedrock: keep a custom http_client and aws_profile on copies made with copy and with_options

Chores

• client: stop recording sampling parameters on OpenTelemetry spans
• docs: describe the type and message of API errors
• internal: define the status error mapping once on the base client
• internal: tell contributors when a runtime type check belongs
• tests: remove ambient ANTHROPIC_ and AWS_ variables before the tests run

Documentation

• client: describe the type, message, code and details of API errors
• client: list each method's errors without their descriptions

Features

• api: add error details types and new error type values
• api: add ids filter to list workspaces
• client: add error classes for HTTP statuses and API error codes, and error_code, details and api_message on APIStatusError

Bug Fixes

• api: capitalize CMEK in error details type names
• api: move some error details types to the resource they describe
• bedrock: raise a ValueError when model is "." or ".." instead of sending the request to a different path
• bedrock: raise a ValueError when model is empty instead of sending the request to /model//invoke
• client: make OverloadedError and ServiceUnavailableError subclasses of InternalServerError
• client: make the first parse of each response model thread-safe
• client: reject path parameters such as '..;x' and ';x'
• client: validate unions correctly across threads on pydantic v1
• tools: keep the memory tool from renaming or deleting the /memories directory
• vertex: percent-encode the model, project ID and region in the request path

Chores

• api: update example values for pattern-constrained string fields
• ci: also run the tests with deferred pydantic model builds
• docs: clarify plugin reach values
• docs: clarify plugin version description and plugin reach
• docs: clarify plugin version description length
• docs: clarify some API field descriptions
• docs: clarify three error descriptions
• docs: clarify which blocks to send back around a fallback block
• docs: correct Claude Tag direct message notes in usage reports
• docs: reword Dream and RBAC role permission descriptions
• docs: update the telemetry destination headers description
• docs: use the Claude Platform name in analytics filter docs
• internal: accept changelog entry files in the changelog check
• internal: move error body helpers into the internal utils
• internal: remove stale TODO comments and a test that could not pass
• tests: check that a None path param is rejected

Documentation

• api: show each field's own description for speed
• clean up escapes and code spans in doc comments

Features

• api: add GA methods for analytics, spend limits and RBAC
• api: add named beta types for unified metrics and RBAC delete responses
• api: add shared analytics order and increase request actor types
• api: add tool_use_limit_reached_error and compaction_limit_reached_error session error types
• api: add types for analytics group_by and spend limit period filters
• api: add user_profile_id to External Keys and Workspaces

Bug Fixes

• api: make spend_limit nullable in the spend limit increase request approve response
• api: require always-sent analytics fields and drop the unused project product field
• client: let pydantic validate params types that accept omit

Chores

• ci: remove unused build upload steps
• docs: clarify the Slack channel id description
• docs: clarify what disabling the Compliance API stops
• docs: clarify what the capability_access_all role action grants
• docs: link Dreams model fields to the supported models section
• docs: update example user ID in Admin API examples
• internal: add a section for each repository's own review rules
• internal: plainer wording in worker comments

Documentation

• client: add missing await to the async parse() docstring example
• examples: keep the message threads example valid on Sonnet 5.5
• examples: use current model IDs
• readme: point to the docs site for documentation
• link to the SDK documentation instead of removed README sections

Features

• api: add Claude Tag endpoints for Claude Enterprise organizations

Bug Fixes

• google-cloud: send user profiles requests to the organization endpoint

Chores

• client: stop sending query params hardcoded in endpoint paths
• docs: improve the descriptions of the code execution tool and its encrypted results
• docs: reword work queue, skill and external key descriptions
• docs: update descriptions of the per-user usage and cost reports
• internal: carry endpoint path query params to the request layer
• internal: check the repository by owner and public name in workflows
• internal: read the beta route qualifier instead of the beta=true query
• internal: remove preview build upload from CI
• internal: stop sending the beta query param from parse and stream

Documentation

• mcp: remove the stray await from the async tool_runner examples
• google-cloud: update the product name
• client: link the Bedrock and Vertex raw response docstrings to the SDK documentation
• update the README and the example request

Features

• api: add support for message threads
• api: add usage and cost reports by dimension, mark older reports legacy

Bug Fixes

• client: stop suggesting math.inf in the max_retries error message
• tools: leave the tool runner's history to the caller after append_messages(), and keep the current reply out of the set_messages_params() callback
• tools: keep running the tool runner's function tools when set_messages_params() gives tools as definitions, and stop running one it takes out of tools
• tools: give the set_messages_params() callback of a tool runner its tools as definitions again
• tools: keep a tool runner's betas, user_profile_id and workspace_id when set_messages_params() leaves them out

Chores

• deps: bump certifi in the dev lockfile
• docs: clarify plugin content scan and validation descriptions
• docs: clarify plugin served_version_pinned and updated_at
• docs: fix usage and cost report examples and ending_at docs
• docs: rate limit model lists vary by organization and workspace

Features

• api: add enforcement status, actions and filter to user profiles

⚠ BREAKING CHANGES

• api: add support for new API version 2026-10-21

Features

• api: add a workspace_id filter and the usage_tier scope type to list spend limits
• api: add support for new API version 2026-10-21

Documentation

• api: remove outdated system role note from messages description

Features

• api: add org webhook endpoints and user profile enforcement events
• api: add RBAC Group owner-access error codes to the Admin API
• api: document the unsupported_charset error code for plugin uploads

Bug Fixes

• bedrock: keep a workspace ID set in default_headers on the Bedrock and Mantle clients
• google-cloud: keep workspace and user profile IDs set in default_headers

Chores

• ci: run the changelog check on a standard runner