Hunter Lovell 7902fa3238 feat(core): add usage_metadata to metadata in LangChainTracer (#34414) ...

Adds `usage_metadata` (token counts, etc.) to the run metadata in
`LangChainTracer`.

When an LLM run ends, usage metadata is extracted from all generations
and aggregated using the existing `add_usage` helper, then stored in
`run.extra["metadata"]["usage_metadata"]`.

The original data in outputs remains unchanged.

Also, see #34415

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Co-authored-by: Mason Daugherty <github@mdrxy.com>
Co-authored-by: Mason Daugherty <mason@langchain.dev>

2025-12-19 12:59:52 -06:00

..

benchmarks

feat: Use uuid7 for run ids (#34172)

2025-12-03 10:09:10 -08:00

integration_tests

core: Add ruff rules for PIE (#26939)

2024-09-27 12:08:35 -04:00

unit_tests

feat(core): add usage_metadata to metadata in LangChainTracer (#34414)

2025-12-19 12:59:52 -06:00

__init__.py

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