diff --git a/src/agent-error-detection.ts b/src/agent-error-detection.ts
index e4e2af9..159a100 100644
--- a/src/agent-error-detection.ts
+++ b/src/agent-error-detection.ts
@@ -126,6 +126,18 @@ export function shouldRotateClaudeToken(
   );
 }
 
+export function isCodexRotationReason(
+  reason: AgentTriggerReason,
+): reason is CodexRotationReason {
+  return (
+    reason === '429' ||
+    reason === 'auth-expired' ||
+    reason === 'org-access-denied' ||
+    reason === 'overloaded' ||
+    reason === 'network-error'
+  );
+}
+
 // ── Rotation trigger classification ─────────────────────────────
 
 export type RotationTriggerResult =
diff --git a/src/message-agent-executor-rules.test.ts b/src/message-agent-executor-rules.test.ts
index 57471f3..e10a6fd 100644
--- a/src/message-agent-executor-rules.test.ts
+++ b/src/message-agent-executor-rules.test.ts
@@ -1,11 +1,16 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
-vi.mock('./agent-error-detection.js', () => ({
-  classifyRotationTrigger: vi.fn(() => ({
-    shouldRetry: false,
-    reason: '',
-  })),
-}));
+vi.mock('./agent-error-detection.js', async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import('./agent-error-detection.js')>();
+  return {
+    ...actual,
+    classifyRotationTrigger: vi.fn(() => ({
+      shouldRetry: false,
+      reason: '',
+    })),
+  };
+});
 
 vi.mock('./codex-token-rotation.js', () => ({
   detectCodexRotationTrigger: vi.fn(() => ({
@@ -71,6 +76,18 @@ describe('message-agent-executor-rules', () => {
     ).toEqual({ reason: 'auth-expired' });
   });
 
+  it('ignores streamed reasons that are not valid Codex rotation triggers', () => {
+    expect(
+      resolveCodexRetryTrigger({
+        canRetryCodex: true,
+        attempt: {
+          streamedTriggerReason: { reason: 'usage-exhausted' },
+        },
+      }),
+    ).toBeNull();
+    expect(detectCodexRotationTrigger).not.toHaveBeenCalled();
+  });
+
   it('detects retryable Claude session failures from either flag or classifier', () => {
     expect(
       isRetryableClaudeSessionFailureAttempt({
diff --git a/src/message-agent-executor-rules.ts b/src/message-agent-executor-rules.ts
index 9215300..c03c33a 100644
--- a/src/message-agent-executor-rules.ts
+++ b/src/message-agent-executor-rules.ts
@@ -2,6 +2,7 @@ import {
   classifyRotationTrigger,
   type AgentTriggerReason,
   type CodexRotationReason,
+  isCodexRotationReason,
 } from './agent-error-detection.js';
 import { detectCodexRotationTrigger } from './codex-token-rotation.js';
 import type { PairedRoomRole, PairedTaskStatus } from './types.js';
@@ -94,8 +95,11 @@ export function resolveCodexRetryTrigger(args: {
   }
 
   if (args.attempt.streamedTriggerReason) {
+    if (!isCodexRotationReason(args.attempt.streamedTriggerReason.reason)) {
+      return null;
+    }
     return {
-      reason: args.attempt.streamedTriggerReason.reason as CodexRotationReason,
+      reason: args.attempt.streamedTriggerReason.reason,
     };
   }
 
diff --git a/src/provider-retry.ts b/src/provider-retry.ts
index 52dfeea..a5ac85c 100644
--- a/src/provider-retry.ts
+++ b/src/provider-retry.ts
@@ -10,6 +10,7 @@ import { getAgentOutputText } from './agent-output.js';
 import {
   classifyRotationTrigger,
   type CodexRotationReason,
+  isCodexRotationReason,
   shouldRotateClaudeToken,
   type AgentTriggerReason,
 } from './agent-error-detection.js';
@@ -210,22 +211,35 @@ function evaluateCodexAttempt(
     attempt.streamedTriggerReason &&
     output.status !== 'error'
   ) {
+    if (!isCodexRotationReason(attempt.streamedTriggerReason.reason)) {
+      logger.error(
+        {
+          ...logContext,
+          provider: 'codex',
+          reason: attempt.streamedTriggerReason.reason,
+        },
+        'Unexpected non-Codex streamed trigger while rotating Codex account',
+      );
+      return { type: 'error' };
+    }
     return {
       type: 'continue',
       trigger: {
-        reason: attempt.streamedTriggerReason.reason as CodexRotationReason,
+        reason: attempt.streamedTriggerReason.reason,
       },
       rotationMessage: getAgentOutputText(output) ?? undefined,
     };
   }
 
   if (output.status === 'error') {
-    const retryTrigger = attempt.streamedTriggerReason
-      ? {
-          shouldRotate: true,
-          reason: attempt.streamedTriggerReason.reason as CodexRotationReason,
-        }
-      : detectCodexRotationTrigger(output.error);
+    const retryTrigger =
+      attempt.streamedTriggerReason &&
+      isCodexRotationReason(attempt.streamedTriggerReason.reason)
+        ? {
+            shouldRotate: true as const,
+            reason: attempt.streamedTriggerReason.reason,
+          }
+        : detectCodexRotationTrigger(output.error);
     if (retryTrigger.shouldRotate) {
       return {
         type: 'continue',
diff --git a/src/task-scheduler.ts b/src/task-scheduler.ts
index ce13440..99aaec4 100644
--- a/src/task-scheduler.ts
+++ b/src/task-scheduler.ts
@@ -27,7 +27,7 @@ import {
 } from './group-folder.js';
 import { createScopedLogger, logger } from './logger.js';
 import { createTaskStatusTracker } from './task-status-tracker.js';
-import { runClaudeRotationLoop } from './provider-retry.js';
+import { runClaudeRotationLoop, runCodexRotationLoop } from './provider-retry.js';
 import {
   detectCodexRotationTrigger,
   rotateCodexToken,
@@ -38,6 +38,7 @@ import {
   classifyRotationTrigger,
   type AgentTriggerReason,
   type CodexRotationReason,
+  isCodexRotationReason,
 } from './agent-error-detection.js';
 import {
   getTokenCount,
@@ -489,65 +490,29 @@ async function runTask(
       initialTrigger: { reason: CodexRotationReason },
       rotationMessage?: string,
     ): Promise<void> => {
-      let trigger = initialTrigger;
-      let lastRotationMessage = rotationMessage;
-
-      while (
-        getCodexAccountCount() > 1 &&
-        rotateCodexToken(lastRotationMessage)
-      ) {
-        log.info(
-          {
-            reason: trigger.reason,
-          },
-          'Codex account unhealthy, retrying scheduled task with rotated account',
-        );
-
-        const retryAttempt = await runTaskAttempt('codex');
-        result = retryAttempt.attemptResult;
-        error = retryAttempt.attemptError;
-
-        if (
-          !retryAttempt.sawOutput &&
-          retryAttempt.streamedTriggerReason &&
-          retryAttempt.output.status !== 'error'
-        ) {
-          trigger = {
-            reason: retryAttempt.streamedTriggerReason
-              .reason as CodexRotationReason,
+      const outcome = await runCodexRotationLoop(
+        initialTrigger,
+        async () => {
+          const retryAttempt = await runTaskAttempt('codex');
+          result = retryAttempt.attemptResult;
+          error = retryAttempt.attemptError;
+          return {
+            output: retryAttempt.output,
+            thrownError: null,
+            sawOutput: retryAttempt.sawOutput,
+            streamedTriggerReason: retryAttempt.streamedTriggerReason,
           };
-          lastRotationMessage =
-            typeof retryAttempt.output.result === 'string'
-              ? retryAttempt.output.result
-              : undefined;
-          continue;
-        }
+        },
+        {
+          taskId: task.id,
+          group: context.group.name,
+          groupFolder: task.group_folder,
+        },
+        rotationMessage,
+      );
 
-        if (retryAttempt.output.status === 'error') {
-          const retryTrigger = retryAttempt.streamedTriggerReason
-            ? {
-                shouldRotate: true,
-                reason: retryAttempt.streamedTriggerReason
-                  .reason as CodexRotationReason,
-              }
-            : detectCodexRotationTrigger(
-                retryAttempt.attemptError || retryAttempt.output.error,
-              );
-
-          if (retryTrigger.shouldRotate) {
-            trigger = { reason: retryTrigger.reason };
-            lastRotationMessage =
-              retryAttempt.attemptError ||
-              retryAttempt.output.error ||
-              undefined;
-            continue;
-          }
-          return;
-        }
-
-        markCodexTokenHealthy();
+      if (outcome.type === 'success') {
         error = null;
-        return;
       }
     };
 
@@ -567,11 +532,12 @@ async function runTask(
       } else if (
         provider === 'codex' &&
         attempt.streamedTriggerReason &&
-        !attempt.sawOutput
+        !attempt.sawOutput &&
+        isCodexRotationReason(attempt.streamedTriggerReason.reason)
       ) {
         await retryCodexTaskWithRotation(
           {
-            reason: attempt.streamedTriggerReason.reason as CodexRotationReason,
+            reason: attempt.streamedTriggerReason.reason,
           },
           typeof attempt.output.error === 'string'
             ? attempt.output.error
@@ -592,13 +558,14 @@ async function runTask(
           });
         }
       } else if (attempt.output.status === 'error' && provider === 'codex') {
-        const trigger = attempt.streamedTriggerReason
-          ? {
-              shouldRotate: true,
-              reason: attempt.streamedTriggerReason
-                .reason as CodexRotationReason,
-            }
-          : detectCodexRotationTrigger(error);
+        const trigger =
+          attempt.streamedTriggerReason &&
+          isCodexRotationReason(attempt.streamedTriggerReason.reason)
+            ? {
+                shouldRotate: true as const,
+                reason: attempt.streamedTriggerReason.reason,
+              }
+            : detectCodexRotationTrigger(error);
         if (trigger.shouldRotate) {
           await retryCodexTaskWithRotation(
             { reason: trigger.reason },