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chore(infra): merge v1.4 into master (#37350)

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Nick Hollon
2026-05-11 14:39:25 -04:00
committed by GitHub
parent bbd10fe918
commit da380bccf8
37 changed files with 1844 additions and 777 deletions
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5
libs/core/langchain_core/tracers/_streaming.py
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@@ -33,8 +33,9 @@ class _V2StreamingCallbackHandler:
"""Marker base class for handlers that consume `on_stream_event` (v2).
A handler inheriting from this class signals that it wants content-
block lifecycle events from `stream_v2` / `astream_v2` rather than
the v1 `on_llm_new_token` chunks. `BaseChatModel.invoke` uses
block lifecycle events from `stream_events(version="v3")` (and its
async equivalent) rather than the v1 `on_llm_new_token` chunks.
`BaseChatModel.invoke` uses
`isinstance(handler, _V2StreamingCallbackHandler)` to decide whether
to route an invoke through the v2 event generator.