- Pass RuntimeState through the event bus and enable entity auto-registration
- Introduce checkpointing API:
- .checkpoint(), .from_checkpoint(), and async checkpoint support
- Provider-based storage with BaseProvider and JsonProvider
- Mid-task resume and kickoff() integration
- Add EventRecord tracking and full event serialization with subtype preservation
- Enable checkpoint fidelity via llm_type and executor_type discriminators
- Refactor executor architecture:
- Convert executors, tools, prompts, and TokenProcess to BaseModel
- Introduce proper base classes with typed fields (CrewAgentExecutorMixin, BaseAgentExecutor)
- Add generic from_checkpoint with full LLM serialization
- Support executor back-references and resume-safe initialization
- Refactor runtime state system:
- Move RuntimeState into state/ module with async checkpoint support
- Add entity serialization improvements and JSON-safe round-tripping
- Implement event scope tracking and replay for accurate resume behavior
- Improve tool and schema handling:
- Make BaseTool fully serializable with JSON round-trip support
- Serialize args_schema via JSON schema and dynamically reconstruct models
- Add automatic subclass restoration via tool_type discriminator
- Enhance Flow checkpointing:
- Support restoring execution state and subclass-aware deserialization
- Performance improvements:
- Cache handler signature inspection
- Optimize event emission and metadata preparation
- General cleanup:
- Remove dead checkpoint payload structures
- Simplify entity registration and serialization logic
