Module snapshot 

W2-2: First-class KernelSnapshot — live kernel state serialization.

Enables:

• Crash recovery (save state, restart, restore)
• Agent migration (move running agent between hosts)
• Checkpointing for long-running tasks
• Cross-session state persistence

The snapshot captures the essential kernel state needed to resume execution:

• TaskTable (all TCBs with budget, wait state, proc info)
• Context summary (messages, task state, signals)
• Turn counter and budget totals

NOT captured (recreated on restore):

• SignalRouter dedup set (cleared on restore)
• Governance pipeline closures (recreated from policy data)
• MilestoneTracker state (recreated from config)
• HandleTable (recreated from context history)

Structs

ContextSnapshot

Snapshot of context state (simplified representation).

KernelSnapshot

Full kernel snapshot.

ProcInfoSnapshot

Snapshot of ProcInfo (sub-agent identity).

ResultSnapshot

Snapshot of SubAgentResult.

TcbSnapshot

Serializable snapshot of a TCB (Task Control Block).