Python: consume Anthropic beta flags

[Yufeng He (he-yufeng)]

Summary

• consume per-run additional_beta_flags into the Anthropic beta set without forwarding it as a raw request kwarg
• add a regression test for _prepare_options(...)

Fixes #5764.

To verify

• uv run pytest tests/test_anthropic_client.py -q
• uv run ruff check agent_framework_anthropic tests/test_anthropic_client.py
• uv run ruff format --check agent_framework_anthropic tests/test_anthropic_client.py
• uv run pyright
• uv run mypy --config-file pyproject.toml agent_framework_anthropic
• python -m py_compile agent_framework_anthropic\_chat_client.py tests\test_anthropic_client.py

[Copilot]

Pull request overview

Fixes an Anthropic client integration issue where per-run additional_beta_flags were being forwarded as a raw request kwarg (causing Anthropic SDK TypeErrors) instead of being consumed into the betas set used for the request.

Changes:

• Remove additional_beta_flags from the final run_options after it has been merged into betas.
• Add a regression test ensuring additional_beta_flags is consumed into betas and not forwarded.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
python/packages/anthropic/agent_framework_anthropic/_chat_client.py	Pops additional_beta_flags from run_options after preparing betas to prevent forwarding unsupported kwargs.
python/packages/anthropic/tests/test_anthropic_client.py	Adds a regression test to verify additional_beta_flags is consumed into betas and removed from run_options.

[Evan Mattson (moonbox3)]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/anthropic/agent_framework_anthropic
_chat_client.py	447	35	92%	461, 464, 545, 639, 641, 784, 820–821, 899, 901, 931–932, 977, 993–994, 1001–1003, 1007–1009, 1013–1016, 1130, 1140, 1192, 1340–1341, 1358, 1371, 1384, 1409–1410
TOTAL	37714	4394	88%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
7500	34 💤	0 ❌	0 🔥	1m 59s ⏱️

[Eduard van Valkenburg (eavanvalkenburg)]

Yufeng He (@he-yufeng) please check the failing tests.

[Evan Mattson (moonbox3)]

Please re-open the PR when CI/CD checks (unit tests) are green.

[Yufeng He (he-yufeng)]

I rebased this branch onto current upstream/main and force-pushed a linear one-commit head after the CI failure.

Validation on the new head:

uv run --dev python -m pytest packages\anthropic\tests\test_anthropic_client.py::test_prepare_options_consumes_additional_beta_flags -q --basetemp .tmp\pytest-5772-target2
uv run --dev python -m pytest packages\anthropic\tests\test_anthropic_client.py -q --basetemp .tmp\pytest-5772-full2
uv run --dev python -m ruff check packages\anthropic\agent_framework_anthropic\_chat_client.py packages\anthropic\tests\test_anthropic_client.py
uv run --dev python -m py_compile packages\anthropic\agent_framework_anthropic\_chat_client.py packages\anthropic\tests\test_anthropic_client.py
git diff --check upstream/main..HEAD

I tried to reopen the PR, but GitHub rejected the reopen request from my side. Could you reopen it so the fresh checks can run?