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LangGraph checkpoints turn ZoneInfo datetimes into fixed offsets (DST math off by an hour after resume)

A zone-aware datetime in graph state comes back from the checkpointer with a fixed UTC offset. How to spot it and store times safely.

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@memorysync · San Francisco, USA

Building MemorySync (memorysync.io) — persistent memory infrastructure for AI agents, Cursor, and Claude Code.

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