test(quota): pin live Cursor GetCurrentPeriodUsage remaining

Signed-in Ultra session returned planUsage remaining/limit 40000
and totalPercentUsed 0. Parse billingCycleEnd as reset time.

Author: Adam-Dalloul

src/lib/subscription-quota.test.ts

@@ -188,6 +188,31 @@ describe("subscription quota inventory", () => {
     expect(parsed?.remaining).toBe(25)
   })
 
+  it("parses the live Cursor GetCurrentPeriodUsage envelope from this machine", () => {
+    // Sanitized from a signed-in Ultra cursor-agent session on 2026-08-16.
+    // Token never stored. Numbers are the real planUsage fields.
+    const payload = {
+      enabled: true,
+      billingCycleStart: "1786889793000",
+      billingCycleEnd: "1789568193000",
+      planUsage: {
+        remaining: 40000,
+        limit: 40000,
+        remainingBonus: false,
+        autoPercentUsed: 0,
+        apiPercentUsed: 0,
+        totalPercentUsed: 0,
+      },
+    }
+    const parsed = remainingFromOfficialPayload("cursor", payload)
+    expect(parsed?.remaining).toBe(100)
+    expect(parsed?.resetsAt).toBe(1_789_568_193)
+    expect(parsed?.extras?.map((e) => e.label).sort()).toEqual([
+      "API",
+      "Auto / Composer",
+    ])
+  })
+
   it("does not invent Cursor remaining from about/status identity", () => {
     expect(
       remainingFromOfficialPayload("cursor", {

src/lib/subscription-quota.ts

@@ -126,9 +126,17 @@ function percentRemaining(usedPercent: unknown): number | null {
 }
 
 function parseResetsAt(value: unknown): number | undefined {
-  if (typeof value === "number" && Number.isFinite(value)) return value
+  if (typeof value === "number" && Number.isFinite(value)) {
+    return value > 1e12 ? Math.floor(value / 1000) : value
+  }
   if (typeof value === "string") {
-    const ms = Date.parse(value)
+    const trimmed = value.trim()
+    if (/^\d+$/.test(trimmed)) {
+      const n = Number(trimmed)
+      if (!Number.isFinite(n)) return undefined
+      return n > 1e12 ? Math.floor(n / 1000) : n
+    }
+    const ms = Date.parse(trimmed)
     if (!Number.isNaN(ms)) return Math.floor(ms / 1000)
   }
   return undefined
@@ -338,6 +346,7 @@ export function remainingFromCursorPeriodUsage(
     limit: 100,
     source: "cursor DashboardService/GetCurrentPeriodUsage",
     extras: extras.length ? extras : undefined,
+    resetsAt: parseResetsAt(rec.billingCycleEnd ?? rec.billing_cycle_end),
   }
 }