fix(langgraph): accept Sequence[...] for Messages #6209
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Description
Broaden the
Messages
alias fromlist[...]
toSequence[...]
to avoid list invariance errors in type checkers when passinglist[BaseMessage]
(e.g., toadd_messages
). This is a typing-only change and does not alter runtime behavior.Issue
Fixes #6207
Dependencies
None
Twitter handle
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