- Reject classes and builtin values in _instance_to_dotted_path
- Require classes in _dotted_path_to_instance
- Drop unused SerializableInstance alias
- Raise on unknown FlowPersistence types in _serialize_persistence
- Gate Knowledge.embedder provider_class restore behind
CREWAI_DESERIALIZE_CALLBACKS
- Raise on unknown source_type tags in _resolve_knowledge_sources
- Tighten _backfill_source_type: only infer 'string' when content is
str; raise otherwise so legacy file-based sources fail loudly
- Add BeforeValidator(_ensure_memory_kind) to Crew/Agent/Flow memory
fields so legacy dict configs get the discriminator at construction
- Default MemoryScope/MemorySlice._memory to None; add _require_memory()
helper and route all internal accesses through it
- Convert test_flow_ask persistence mocks to RecordingPersistence
