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Add REFUTE scientific critique + calibration benchmark

Status: Open.

#1781 In anthropics/anthropic-sdk-python;

· connerlambden opened on Jul 24, 2026

Self-hosted environment: worker spawned per claimed work item is told to shut down before executing (sandbox-per-session handoff broken; in-process pattern works)

Status: Open.

#1779 In anthropics/anthropic-sdk-python;

· raghu-giatec opened on Jul 24, 2026

AsyncAnthropicBedrock blocks the event loop during AWS credential resolution or signing

Status: Open.

#1770 In anthropics/anthropic-sdk-python;

· jjurm opened on Jul 22, 2026

AttributeError: 'WindowsPath' object has no attribute 'read'

Status: Open.

#1769 In anthropics/anthropic-sdk-python;

· kannanwisen opened on Jul 22, 2026

Document file retention policy for uploaded files when an account lapses

Status: Open.

#1767 In anthropics/anthropic-sdk-python;

· dhanuk13 opened on Jul 20, 2026

transform_schema raises AssertionError on valid list-form types, e.g. {"type": ["string", "null"]}

Status: Open.

#1764 In anthropics/anthropic-sdk-python;

· shamashel opened on Jul 16, 2026

First API request forks a subprocess via platform.platform() — child segfaults on macOS in long-running processes

Status: Open.

#1762 In anthropics/anthropic-sdk-python;

· ratpH1nk opened on Jul 16, 2026

backoff() raises OverflowError instead of returning the cap for very large attempt counts

Status: Open.

#1760 In anthropics/anthropic-sdk-python;

· winklemad opened on Jul 15, 2026

Structured output not working for opus-4.8 and sonnet 5

Status: Open.

#1759 In anthropics/anthropic-sdk-python;

· kamalkraj opened on Jul 15, 2026

Consider migrating from httpx to httpx2

Status: Open.

#1755 In anthropics/anthropic-sdk-python;

· peterlundberg opened on Jul 13, 2026

SessionToolRunner can re-execute a tool call after a stream reconnect if its result post failed

Status: Open.

#1749 In anthropics/anthropic-sdk-python;

· PranavMishra28 opened on Jul 11, 2026

[BUG] MCP connector: parallel mcp_tool_use calls stall ~300s per turn; one call per batch runs twice

Status: Open.

#1747 In anthropics/anthropic-sdk-python;

· Moosapoor opened on Jul 9, 2026