Summary

Only Cooperative with Timeout (Strategy 1) is implemented. The spec defines three additional strategies.

Design Spec Reference

• §6.7 Graceful Shutdown Protocol — Strategies 2, 3, 4

Scope

• Immediate Cancel (Strategy 2): Force-cancel all agent tasks immediately
• Finish Current Tool (Strategy 3): Wait for current tool invocation to complete even past grace period (needs per-tool timeout backstop)
• Checkpoint and Stop (Strategy 4): Persist full AgentContext snapshot, transition to SUSPENDED, resume on restart
• All must implement ShutdownStrategy protocol