Tool guidance sections keep only what the tool definitions do not say.
Apply review: reword interrupt_agent and list_agents, carry "a rejected
escalation stays denied" in the rejection error, pin
sandboxPermissionsDescription, and fix stale README and Agent Note
statements. Record the tool-definition rules in agent-experience.
Compaction threshold snapshots shift their context windows by the
370-token system-prompt estimate reduction; escalation-rejected moves to
a v4 fixture for the new rejection text.