MemorySync (@memorysync)

CrewAI memory + checkpointing: fixing 'Unable to serialize unknown type: ModelMetaclass' (no checkpoint written)

Turn on Memory and checkpointing together and every task_completed checkpoint silently fails to write. Here's why, how to catch it, and a small patch until the fix ships.

11 min readmemorysync.hashnode.dev

4h ago

Memory for AI coaches, tutors and companions: what to store per user, and what not to

How to give an AI coach, tutor or companion app memory per user: what to store, what to skip, how to scope it by user, and how to let users reset it.

7 min readmemorysync.hashnode.dev

4h ago

Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime ("Checkpoint deserialization blocked")

A workflow checkpoint with a ZoneInfo-aware datetime fails to save to file, even with zoneinfo:ZoneInfo allowlisted. Repro on 1.25.0 and what to store instead.

6 min readmemorysync.hashnode.dev

2d ago

Google ADK DatabaseSessionService: "TypeError: fromisoformat: argument must be str" on SQLite

get_session() fails when a SQLite session table holds float timestamps. Why it happens, how to reproduce it, and the version that handles it.

6 min readmemorysync.hashnode.dev

2d ago

CrewAI memory recall: "TypeError: can't subtract offset-naive and offset-aware datetimes"

CrewAI's recall scoring subtracts a naive utcnow() from your record's created_at. A timezone-aware timestamp crashes recall. Repro and workaround.

6 min readmemorysync.hashnode.dev

3d ago

MemorySync

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MemorySync's blogs

CrewAI memory + checkpointing: fixing 'Unable to serialize unknown type: ModelMetaclass' (no checkpoint written)

Memory for AI coaches, tutors and companions: what to store per user, and what not to

Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime ("Checkpoint deserialization blocked")

Google ADK DatabaseSessionService: "TypeError: fromisoformat: argument must be str" on SQLite

CrewAI memory recall: "TypeError: can't subtract offset-naive and offset-aware datetimes"

MemorySync

About

Available for

MemorySync's blogs

CrewAI memory + checkpointing: fixing 'Unable to serialize unknown type: ModelMetaclass' (no checkpoint written)

Memory for AI coaches, tutors and companions: what to store per user, and what not to

Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime ("Checkpoint deserialization blocked")

Google ADK DatabaseSessionService: "TypeError: fromisoformat: argument must be str" on SQLite

CrewAI memory recall: "TypeError: can't subtract offset-naive and offset-aware datetimes"

MemorySync

About

Available for

MemorySync's blogs

CrewAI memory + checkpointing: fixing 'Unable to serialize unknown type: ModelMetaclass' (no checkpoint written)

Memory for AI coaches, tutors and companions: what to store per user, and what not to

Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime ("Checkpoint deserialization blocked")

Google ADK DatabaseSessionService: "TypeError: fromisoformat: argument must be str" on SQLite

CrewAI memory recall: "TypeError: can't subtract offset-naive and offset-aware datetimes"

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MemorySync

About

Available for

MemorySync's blogs

CrewAI memory + checkpointing: fixing 'Unable to serialize unknown type: ModelMetaclass' (no checkpoint written)

Memory for AI coaches, tutors and companions: what to store per user, and what not to

Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime ("Checkpoint deserialization blocked")

Google ADK DatabaseSessionService: "TypeError: fromisoformat: argument must be str" on SQLite

CrewAI memory recall: "TypeError: can't subtract offset-naive and offset-aware datetimes"