feat(langchain): Add automatic instrumentation#183
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Abhijeet Prasad (AbhiPrasad) merged 1 commit intoApr 1, 2026
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Add a CallbackPatcher base primitive and use it to model LangChain as an SDK integration that installs a default Braintrust callback handler. Export the LangChain integration, wire it into auto_instrument(), and add focused setup and auto-instrument tests. Also document CallbackPatcher usage in the sdk-integrations skill so future integrations can use the same pattern for setup-only side effects.
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Building on top of #150, this PR adds automatic instrumentation for langchain. Now when you call
braintrust.auto_instrument()you'll get langchain automatically instrumented.Add a CallbackPatcher base primitive and use it to model LangChain as an SDK integration that installs a default Braintrust callback handler. Export the LangChain integration, wire it into auto_instrument(), and add focused setup and auto-instrument tests.
Also document CallbackPatcher usage in the sdk-integrations skill so future integrations can use the same pattern for setup-only side effects.