Document session handoff continuity

Serialize and restore multi-agent state for continuity across conversation boundaries

Multi-agent orchestration where agents must hand off work and restore full execution context.

• · agent state dict
• · conversation context
• · optional resumption query

• · serialized state
• · resumption handoff payload

State must be JSON-serializable; agent must implement export/import protocol

Circular references in state cause serialization failure; stale resumption context mismatches reality

• · Protocol enforced by type system
• · Round-trip verified