fix(auth): distinguish revoked API keys from transient auth errors (#25754)

Merged via /review-pr -> /prepare-pr -> /merge-pr.

Prepared head SHA: 8f9c07a200
Co-authored-by: rrenamed <87486610+rrenamed@users.noreply.github.com>
Co-authored-by: gumadeiras <5599352+gumadeiras@users.noreply.github.com>
Reviewed-by: @gumadeiras

src/agents/auth-profiles/usage.test.ts

@@ -141,6 +141,24 @@ describe("resolveProfilesUnavailableReason", () => {
     ).toBe("billing");
   });
 
+  it("returns auth_permanent for active permanent auth disables", () => {
+    const now = Date.now();
+    const store = makeStore({
+      "anthropic:default": {
+        disabledUntil: now + 60_000,
+        disabledReason: "auth_permanent",
+      },
+    });
+
+    expect(
+      resolveProfilesUnavailableReason({
+        store,
+        profileIds: ["anthropic:default"],
+        now,
+      }),
+    ).toBe("auth_permanent");
+  });
+
   it("uses recorded non-rate-limit failure counts for active cooldown windows", () => {
     const now = Date.now();
     const store = makeStore({
@@ -490,7 +508,7 @@ describe("markAuthProfileFailure — active windows do not extend on retry", ()
   async function markFailureAt(params: {
     store: ReturnType<typeof makeStore>;
     now: number;
-    reason: "rate_limit" | "billing";
+    reason: "rate_limit" | "billing" | "auth_permanent";
   }): Promise<void> {
     vi.useFakeTimers();
     vi.setSystemTime(params.now);
@@ -528,6 +546,18 @@ describe("markAuthProfileFailure — active windows do not extend on retry", ()
       }),
       readUntil: (stats: WindowStats | undefined) => stats?.disabledUntil,
     },
+    {
+      label: "disabledUntil(auth_permanent)",
+      reason: "auth_permanent" as const,
+      buildUsageStats: (now: number): WindowStats => ({
+        disabledUntil: now + 20 * 60 * 60 * 1000,
+        disabledReason: "auth_permanent",
+        errorCount: 5,
+        failureCounts: { auth_permanent: 5 },
+        lastFailureAt: now - 60_000,
+      }),
+      readUntil: (stats: WindowStats | undefined) => stats?.disabledUntil,
+    },
   ];
 
   for (const testCase of activeWindowCases) {
@@ -573,6 +603,19 @@ describe("markAuthProfileFailure — active windows do not extend on retry", ()
       expectedUntil: (now: number) => now + 20 * 60 * 60 * 1000,
       readUntil: (stats: WindowStats | undefined) => stats?.disabledUntil,
     },
+    {
+      label: "disabledUntil(auth_permanent)",
+      reason: "auth_permanent" as const,
+      buildUsageStats: (now: number): WindowStats => ({
+        disabledUntil: now - 60_000,
+        disabledReason: "auth_permanent",
+        errorCount: 5,
+        failureCounts: { auth_permanent: 2 },
+        lastFailureAt: now - 60_000,
+      }),
+      expectedUntil: (now: number) => now + 20 * 60 * 60 * 1000,
+      readUntil: (stats: WindowStats | undefined) => stats?.disabledUntil,
+    },
   ];
 
   for (const testCase of expiredWindowCases) {