fix(delegate-task): pause timeouts for active sessions

src/tools/delegate-task/sync-session-poller.ts

@@ -7,6 +7,7 @@ import { extractErrorMessage } from "../../features/background-agent/error-class
 
 const NON_TERMINAL_FINISH_REASONS = new Set(["tool-calls", "unknown"])
 const PENDING_TOOL_PART_TYPES = new Set(["tool", "tool_use", "tool-call"])
+const ACTIVE_SESSION_STATUSES = new Set(["busy", "retry", "running"])
 
 function wait(milliseconds: number): Promise<void> {
   const sharedBuffer = new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT)
@@ -24,6 +25,10 @@ function abortSyncSession(client: OpencodeClient, sessionID: string, reason: str
   })
 }
 
+function isActiveSessionStatus(status: { type: string } | undefined): boolean {
+  return status !== undefined && ACTIVE_SESSION_STATUSES.has(status.type)
+}
+
 async function fetchSessionMessages(
   client: OpencodeClient,
   sessionID: string
@@ -84,6 +89,7 @@ export async function pollSyncSession(
   const maxPollTimeMs = Math.max(timeoutMs ?? getDefaultSyncPollTimeoutMs(), 50)
   const maxTurns = input.maxAssistantTurns ?? DEFAULT_MAX_ASSISTANT_TURNS
   const pollStart = Date.now()
+  let inactiveStart = pollStart
   let pollCount = 0
   let timedOut = false
   let assistantTurnCount = 0
@@ -91,7 +97,13 @@ export async function pollSyncSession(
 
   log("[task] Starting poll loop", { sessionID: input.sessionID, agentToUse: input.agentToUse, maxTurns })
 
-  while (Date.now() - pollStart < maxPollTimeMs) {
+  while (true) {
+    const inactiveElapsedMs = Date.now() - inactiveStart
+    if (inactiveElapsedMs >= maxPollTimeMs) {
+      timedOut = true
+      break
+    }
+
     if (ctx.abort?.aborted) {
       try {
         const messages = await fetchSessionMessages(client, input.sessionID)
@@ -132,11 +144,13 @@ export async function pollSyncSession(
         sessionID: input.sessionID,
         pollCount,
         elapsed: Math.floor((Date.now() - pollStart) / 1000) + "s",
+        inactiveElapsed: Math.floor(inactiveElapsedMs / 1000) + "s",
         sessionStatus: sessionStatus?.type ?? "not_in_status",
       })
     }
 
-    if (sessionStatus && sessionStatus.type !== "idle") {
+    if (isActiveSessionStatus(sessionStatus)) {
+      inactiveStart = Date.now()
       continue
     }
 
@@ -199,8 +213,7 @@ export async function pollSyncSession(
     }
   }
 
-  if (Date.now() - pollStart >= maxPollTimeMs) {
-    timedOut = true
+  if (timedOut) {
     log("[task] Poll timeout reached", { sessionID: input.sessionID, pollCount })
     abortSyncSession(client, input.sessionID, "poll_timeout")
   }