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command-r-plus resolves to command-r-plus-04-2024 which was deprecated 2025-09-15, causing flaky tool calling failures. Patch the cloned langchain-cohere tests to use command-a-03-2025 instead. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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The test_langchain_tool_calling_agent test uses deprecated models and hits the live API without temperature=0, causing non-deterministic failures unrelated to SDK changes. See PR #738 for investigation. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Instead of skipping the entire langchain-cohere job, deselect only the single flaky test. The remaining 39 integration tests and 98 unit tests still run. See PR #738 for investigation. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Investigation into the failing
test-langchain-cohereCI job.Findings
The
test_langchain_tool_calling_agentintegration test in langchain-cohere is failing because the model returns empty tool call arguments{}for a tool that requires aninputparameter, causing a Pydantic validation error.Root causes investigated:
command-r-plus, which resolves tocommand-r-plus-04-2024(deprecated Sept 15, 2025)command-a-03-2025— same failuretemperature=0setting, making it inherently non-deterministicReproduction: A whitespace-only change on a fresh branch produces the same failure, confirming it's unrelated to any SDK code changes.
Recommendation
We should skip the
test-langchain-cohereCI job (or mark it ascontinue-on-error) until the upstream test is fixed. The job clones langchain-cohere at HEAD and runs its integration tests against the live API — we have no control over its stability. The issue should be reported to https://github.com/langchain-ai/langchain-cohere.