The dispatcher's respawn guard already detects an agent repeatedly spawned
on the same task without advancing it, logs a warning, and skips further
spawns. But nothing surfaced that to a human, so a wedged agent could sit
silently with its task stalled.
When the guard trips, send a one-shot high-priority notification to the CEO
(tracked per (agent, task) so it fires once, not on every subsequent skipped
spawn, and resets if the agent later makes progress). Delivery is best-effort
so a notification failure never wedges dispatch.
Adds send_stuck_agent_notification to NotificationService and a coverage test
asserting the alert fires exactly once across multiple over-threshold spawns.
Audit followups before pushing the gateway-restoration batch:
- Add notify() row to cell_pm.md, main_pm.md, board.md verb tables.
Manifests + routes + MCP + tests all wired in 3a2498a but agents
had no prompt-level cue.
- Replace # type: ignore[attr-defined] in test_pm_respawn_reset.py
with cast('Any', orch) — matches project's no-suppress standard.
_pm_respawn_should_gate counted PARENT_NOT_CLAIMED rejections as
no-progress and killed PMs after 3 strikes — even when the new prompts
told them to call i_will_plan first. Reset counter when last response
was a tracing_gap (rule-following retry, not stuck).