Anthropic SDK v0.122.0

Version 0.122.0 adds `output_behavior` to `dream` creation, letting callers either create a new memory store or update the input store in place, and exposes `beta.messages.parse`, `stream`, and `tool_runner` for Bedrock and Vertex. It also fixes async SigV4 signing, streaming message accumulation, and several client edge cases like empty Anthropic API credentials being treated as unset and symlink loops being rejected in tool paths.

0.122.0 (2026-08-13) Full Changelog: v0.121.0...v0.122.0 Features api: add output_behavior to dream creation (create a new memory store or update the input store in place) ( 852c4bb ) Bug Fixes bedrock,aws: run SigV4 signing off the event loop in async clients ( #334 ) ( 2bae6c8 ) bedrock: expose beta.messages.parse, stream and tool_runner ( #366 ) ( 6eca7bb ) client: add models ( 52e9d94 ) client: keep token exchange bound per client across copy() ( #388 ) ( c13e6e3 ) client: read PathLike contents passed inside a file tuple ( 070f953 ) client: treat empty ANTHROPIC_API_KEY / ANTHROPIC_AUTH_TOKEN as unset ( #341 ) ( 76a2e68 ) streaming: add context to malformed tool input JSON errors in the non-beta accumulator ( #339 ) ( a343e17 ) streaming: apply all message_delta fields when accumulating streamed messages ( #380 ) ( fc1599b ) streaming: emit input_json events for server tool use blocks ( #336 ) ( ccfc8e1 ) streaming: keep omitted content block fields unset in accumulated messages ( #346 ) ( cd40aab ) streaming: run the request transform once in messages.stream() ( #347 ) ( 81a92da ) streaming: silence pydantic serializer warnings on message_stop events ( #338 ) ( 41f9cdc ) tools: reject symlink loops in tool paths and skip special skill-archive members ( #322 ) ( 43e8669 ) vertex: expose beta.messages.parse and tool_runner ( #367 ) ( 96723a0 ) Chores ci: run breaking-change detection as a ci.yml job on every push ( 6dfd16e ) examples: update messages_stream.py shebang from rye to uv ( #1519 ) ( 7d72364 ) internal: codegen related update ( 21a0e3d ) internal: drop remaining references to black ( 13df390 ) internal: remove misc things ( d6ee99e ) tests: use pytest monkeypatch and fakes instead of unittest.mock ( 55d246f ) tests: use pytest monkeypatch instead of unittest.mock ( e0c6488 ) Documentation api: clarify that user profile name is optional for resold profiles ( b8f9f61 ) fix fulfillment typos in session runner ( #1795 ) ( 009b035 ) fix incorrect docstring in AsyncAnthropicFoundry.models ( #1592 ) ( f1f5e9b ) Refactors use the not_given singleton instead of the legacy NOT_GIVEN alias ( eeb4d74 )