Issues

• TextEvent.parsed_snapshot() raises ValueError on ordinary text (and on the empty first delta), and its return annotation is wrong for non-object JSON

  anthropics/anthropic-sdk-python#1961 · Filter by author feiiiiii5 opened on Sep 29, 2026

• Messages API: text after a tool_result is held for several seconds, then sent in one burst (claude-sonnet-5-5)

  anthropics/anthropic-sdk-python#1960 · Filter by author rohanlad opened on Sep 29, 2026
  2

• Claude Sonnet 4.6 doesn't call tools properly when thinking + structured output is used

  anthropics/anthropic-sdk-python#1949 · Filter by author minhduc0711 opened on Sep 24, 2026

• Managed Agents: make SessionToolRunner's per-tool-call TOOL_TIMEOUT (150 s) configurable on EnvironmentWorker

  anthropics/anthropic-sdk-python#1948 · Filter by author hlee-cb opened on Sep 24, 2026
  1

• Expose remaining prepaid credit balance (endpoint, error body, or low-balance webhook)

  anthropics/anthropic-sdk-python#1942 · Filter by author paul-schappert opened on Sep 20, 2026
  2

• streaming: a later message_delta that omits stop_reason resets it to None (container is guarded, the stop_* fields are not)

  anthropics/anthropic-sdk-python#1940 · Filter by author feiiiiii5 opened on Sep 18, 2026
  1

• Batch result decoders leave responses open after parsing or transport errors

  anthropics/anthropic-sdk-python#1928 · Filter by author betacatsling opened on Sep 11, 2026

• Sonnet 5 strict tool calls double-escape Unicode and introduce control characters into copied text

  anthropics/anthropic-sdk-python#1926 · Filter by author crayola opened on Sep 10, 2026

• Sonnet 5 strict tool use returns a string for an array-typed property

  anthropics/anthropic-sdk-python#1925 · Filter by author crayola opened on Sep 10, 2026

• Transport errors while consuming a stream escape as raw httpx exceptions instead of APITimeoutError / APIConnectionError

  anthropics/anthropic-sdk-python#1919 · Filter by author HardMax71 opened on Sep 7, 2026
  1

• Mid-stream error events still raise APIStatusError with status_code=200 (#1258 closed without a fix)

  anthropics/anthropic-sdk-python#1918 · Filter by author HardMax71 opened on Sep 7, 2026

• Three symlink tests in test_agent_toolset.py are missing the needs_symlinks marker

  anthropics/anthropic-sdk-python#1915 · Filter by author iam-kira opened on Sep 6, 2026
  3

• beta_tool generates a type: array input_schema and an uncallable tool for positional-only parameters (and *args)

  anthropics/anthropic-sdk-python#1911 · Filter by author azrabano23 opened on Sep 4, 2026

• Messages.parse (and AsyncMessages.parse) don't take cache_control?

  anthropics/anthropic-sdk-python#1907 · Filter by author jheiss opened on Sep 3, 2026

• Asynchronous identity_token_provider to WorkloadIdentityCredentials

  anthropics/anthropic-sdk-python#1901 · Filter by author jheiss opened on Sep 1, 2026
  3

• Add an explicit authentication mode to AnthropicBedrockMantle

  anthropics/anthropic-sdk-python#1893 · Filter by author gouveags opened on Aug 28, 2026
  3

• Structured outputs (output_config.format/json_schema): mid-stream invalid_request_error triggered by quoted string content in the prompt, not the schema

  anthropics/anthropic-sdk-python#1889 · Filter by author MathewHancock opened on Aug 26, 2026

• setup_skills re-downloads and rmtrees skills on every session, racing when workers share a workdir

  anthropics/anthropic-sdk-python#1871 · Filter by author ogiogi93 opened on Aug 22, 2026
  3

• Managed Agents self-hosted worker: download_session_skills skips roster agents' skills, so subagent threads run without them

  anthropics/anthropic-sdk-python#1870 · Filter by author ogiogi93 opened on Aug 22, 2026
  1

• Windows: os.fchmod in credential write-back bricks the OAuth refresh token

  anthropics/anthropic-sdk-python#1868 · Filter by author Anklebuster opened on Aug 21, 2026
  1

• BetaCompactionBlockParam.encrypted_content accepted by SDK types but rejected by the live API with "Extra inputs are not permitted"

  anthropics/anthropic-sdk-python#1828 · Filter by author Anirudh-rb26 opened on Aug 14, 2026
  2

• output_config.format cannot take the pydantic model that output_format deprecates, and the dict workaround silently skips transform_schema

  anthropics/anthropic-sdk-python#1819 · Filter by author percymcn opened on Aug 10, 2026

• transform_schema empties a patternProperties map: field can only ever be {}

  anthropics/anthropic-sdk-python#1817 · Filter by author percymcn opened on Aug 10, 2026

• Streaming accumulator crashes when message_start omits usage as shown in thinking docs

  anthropics/anthropic-sdk-python#1806 · Filter by author zifeng-yw opened on Aug 6, 2026
  5

• Self-hosted environments: outcome grader's tool results rejected with 400, so grading never completes

  anthropics/anthropic-sdk-python#1790 · Filter by author MattMencel opened on Jul 30, 2026
  1