diff --git a/src/providers/quota.ts b/src/providers/quota.ts
index 29a57c452a..bb3bab2837 100644
--- a/src/providers/quota.ts
+++ b/src/providers/quota.ts
@@ -237,21 +237,27 @@ function providerLabel(providerId: string): string {
 }
 
 function normalizeResetAt(value: unknown): number | undefined {
-  if (typeof value === "number" && Number.isFinite(value)) return value > 10_000_000_000 ? value : value * 1000;
+  if (typeof value === "number" && Number.isFinite(value)) return epochMillis(value);
   if (typeof value === "string" && value.trim()) {
     const trimmed = value.trim();
     // Cursor Connect RPC returns billingCycleEnd as a unix-ms decimal string ("1771077734000").
     // Date.parse treats that as invalid; numeric epoch strings must be handled explicitly.
-    if (/^\d+(\.\d+)?$/.test(trimmed)) {
+    if (/^[+-]?\d+(\.\d+)?$/.test(trimmed)) {
       const numeric = Number(trimmed);
-      if (Number.isFinite(numeric)) return numeric > 10_000_000_000 ? numeric : numeric * 1000;
+      return epochMillis(numeric);
     }
     const parsed = Date.parse(trimmed);
-    return Number.isFinite(parsed) ? parsed : undefined;
+    return Number.isFinite(parsed) && parsed > 0 ? parsed : undefined;
   }
   return undefined;
 }
 
+/** Unix 0 / negative values are sentinels, not reset clocks (Command Code fiveHour.resetAt: 0). */
+function epochMillis(value: number): number | undefined {
+  if (!Number.isFinite(value) || value <= 0) return undefined;
+  return value > 10_000_000_000 ? value : value * 1000;
+}
+
 function toFiniteNumber(value: unknown): number | undefined {
   if (typeof value === "number" && Number.isFinite(value)) return value;
   if (typeof value === "string" && value.trim()) {
diff --git a/tests/command-code-quota.test.ts b/tests/command-code-quota.test.ts
index e840bb8dd3..3e8da6d0d3 100644
--- a/tests/command-code-quota.test.ts
+++ b/tests/command-code-quota.test.ts
@@ -118,6 +118,66 @@ describe("Command Code provider quota", () => {
     expect(JSON.stringify(result)).not.toContain("commandcode-secret");
   });
 
+  test("omits a zero Command Code window reset instead of treating it as the Unix epoch", async () => {
+    globalThis.fetch = (async (input: RequestInfo | URL) => {
+      const url = String(input);
+      if (url === "https://api.commandcode.ai/alpha/whoami"
+        || url === "https://api.commandcode.ai/alpha/billing/subscriptions"
+        || url === "https://api.commandcode.ai/alpha/usage/summary") {
+        return new Response("down", { status: 500 });
+      }
+      if (url !== "https://api.commandcode.ai/alpha/billing/credits") {
+        throw new Error(`unexpected Command Code quota probe: ${url}`);
+      }
+      return new Response(JSON.stringify({
+        windowLimits: {
+          fiveHour: { cap: 14, used: 0, resetAt: 0 },
+          weekly: { cap: 35, used: 34.9522404823, resetAt: 1_787_184_801_319 },
+        },
+      }), { status: 200, headers: { "content-type": "application/json" } });
+    }) as typeof fetch;
+
+    const result = await fetchProviderQuotaReports(commandCodeConfig(), true);
+
+    expect(result.reports[0]?.quota).toEqual({
+      fiveHourPercent: 0,
+      weeklyPercent: 99.86354423514285,
+      weeklyResetAt: 1_787_184_801_319,
+      updatedAt: expect.any(Number),
+    });
+    expect(result.reports[0]?.quota).not.toHaveProperty("fiveHourResetAt");
+  });
+
+  test("omits a signed numeric Command Code window reset instead of Date.parse-ing it", async () => {
+    globalThis.fetch = (async (input: RequestInfo | URL) => {
+      const url = String(input);
+      if (url === "https://api.commandcode.ai/alpha/whoami"
+        || url === "https://api.commandcode.ai/alpha/billing/subscriptions"
+        || url === "https://api.commandcode.ai/alpha/usage/summary") {
+        return new Response("down", { status: 500 });
+      }
+      if (url !== "https://api.commandcode.ai/alpha/billing/credits") {
+        throw new Error(`unexpected Command Code quota probe: ${url}`);
+      }
+      return new Response(JSON.stringify({
+        windowLimits: {
+          fiveHour: { cap: 14, used: 0, resetAt: "-1" },
+          weekly: { cap: 35, used: 34.9522404823, resetAt: 1_787_184_801_319 },
+        },
+      }), { status: 200, headers: { "content-type": "application/json" } });
+    }) as typeof fetch;
+
+    const result = await fetchProviderQuotaReports(commandCodeConfig(), true);
+
+    expect(result.reports[0]?.quota).toEqual({
+      fiveHourPercent: 0,
+      weeklyPercent: 99.86354423514285,
+      weeklyResetAt: 1_787_184_801_319,
+      updatedAt: expect.any(Number),
+    });
+    expect(result.reports[0]?.quota).not.toHaveProperty("fiveHourResetAt");
+  });
+
   test("keeps rolling windows when whoami and usage summary fail", async () => {
     const seen: string[] = [];
     globalThis.fetch = (async (input: RequestInfo | URL) => {