fix(todo-continuation-enforcer): stop idle continuation after repeated stagnation

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/todo-continuation-enforcer/idle-event.ts

@@ -16,6 +16,7 @@ import {
 } from "./constants"
 import { isLastAssistantMessageAborted } from "./abort-detection"
 import { hasUnansweredQuestion } from "./pending-question-detection"
+import { shouldStopForStagnation } from "./stagnation-detection"
 import { getIncompleteCount } from "./todo"
 import type { MessageInfo, ResolvedMessageInfo, Todo } from "./types"
 import type { SessionStateStore } from "./session-state"
@@ -93,12 +94,14 @@ export async function handleSessionIdle(args: {
   }
 
   if (!todos || todos.length === 0) {
+    sessionStateStore.resetContinuationProgress(sessionID)
     log(`[${HOOK_NAME}] No todos`, { sessionID })
     return
   }
 
   const incompleteCount = getIncompleteCount(todos)
   if (incompleteCount === 0) {
+    sessionStateStore.resetContinuationProgress(sessionID)
     log(`[${HOOK_NAME}] All todos complete`, { sessionID, total: todos.length })
     return
   }
@@ -183,6 +186,11 @@ export async function handleSessionIdle(args: {
     return
   }
 
+  const progressUpdate = sessionStateStore.trackContinuationProgress(sessionID, incompleteCount)
+  if (shouldStopForStagnation({ sessionID, incompleteCount, progressUpdate })) {
+    return
+  }
+
   startCountdown({
     ctx,
     sessionID,