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fix(usage-limits): invalidate legacy Antigravity cache #147

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Merged
pitimon merged 1 commit into from
Aug 5, 2026
Merged

fix(usage-limits): invalidate legacy Antigravity cache #147

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6 changes: 6 additions & 0 deletions src/lib/usage-limits.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,10 @@ const runUsageLimitsFetch = createSingleFlight();
const CACHE_TTL_MS = 2 * 60 * 1000;
const DEFAULT_PROVIDER_TIMEOUT_MS = 15_000;
const ANTIGRAVITY_LIMITS_CACHE_FILE = "usage-limits-cache.json";
// Trust marker, not a user identity: only cache blocks written after the
// current-user process-scan fix may be served. Missing/unknown markers fail
// closed so a legacy multi-user cache cannot disclose another account.
const ANTIGRAVITY_CACHE_PROCESS_SCOPE = "current-user-v1";
const ANTIGRAVITY_LIMITS_CACHE_MAX_AGE_MS = 7 * 24 * 60 * 60 * 1000;
const ANTIGRAVITY_LIMITS_CACHE_UNKNOWN_RESET_TTL_MS = 12 * 60 * 60 * 1000;
const CLAUDE_LIMITS_CACHE_MAX_AGE_MS = 24 * 60 * 60 * 1000;
Expand Down Expand Up @@ -1447,6 +1451,7 @@ function hasAntigravityWindow(limits) {
}

function normalizeAntigravityCachedLimits(raw, { nowMs = Date.now() } = {}) {
if (raw?.process_scope !== ANTIGRAVITY_CACHE_PROCESS_SCOPE) return null;
const cachedAtMs = parseTimeMs(raw?.cached_at);
if (!Number.isFinite(cachedAtMs)) return null;
if (cachedAtMs > nowMs + 60_000) return null;
Expand Down Expand Up @@ -1475,6 +1480,7 @@ function writeAntigravityLimitsCache(limits, { home, nowMs = Date.now() } = {})
if (!limits?.configured || limits.error || !hasAntigravityWindow(limits)) return;
const payload = {
antigravity: {
process_scope: ANTIGRAVITY_CACHE_PROCESS_SCOPE,
account_email: limits.account_email || null,
account_plan: limits.account_plan || null,
primary_window: limits.primary_window || null,
Expand Down
40 changes: 40 additions & 0 deletions test/usage-limits.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1352,6 +1352,7 @@ lang 123 me 22u IPv4 0x123 0t0 TCP 127.0.0.1:51234 (LISTEN)

const cachedPath = path.join(tmp, ".tokentracker", "tracker", "usage-limits-cache.json");
const cached = JSON.parse(fs.readFileSync(cachedPath, "utf8"));
assert.equal(cached.antigravity.process_scope, "current-user-v1");
assert.equal(cached.antigravity.primary_window.used_percent, 75);
assert.equal(cached.antigravity.cached_at, "2026-05-21T00:00:00.000Z");
} finally {
Expand All @@ -1368,6 +1369,7 @@ lang 123 me 22u IPv4 0x123 0t0 TCP 127.0.0.1:51234 (LISTEN)
path.join(trackerDir, "usage-limits-cache.json"),
JSON.stringify({
antigravity: {
process_scope: "current-user-v1",
primary_window: {
used_percent: 42,
reset_at: "2026-05-22T00:00:00.000Z",
Expand All @@ -1393,6 +1395,43 @@ lang 123 me 22u IPv4 0x123 0t0 TCP 127.0.0.1:51234 (LISTEN)
}
});

it("does not serve Antigravity cache with missing or unknown current-user provenance", async () => {
const tmp = fs.mkdtempSync(path.join(os.tmpdir(), "tokentracker-antigravity-cache-legacy-"));
try {
const trackerDir = path.join(tmp, ".tokentracker", "tracker");
fs.mkdirSync(trackerDir, { recursive: true });
const commandRunner = () => ({ stdout: "", stderr: "", status: 1 });

for (const processScope of [undefined, "current-user-v2"]) {
const antigravity = {
account_email: "another-user@example.com",
account_plan: "Pro",
primary_window: {
used_percent: 42,
reset_at: "2026-05-22T00:00:00.000Z",
},
cached_at: "2026-05-21T00:00:00.000Z",
};
if (processScope !== undefined) antigravity.process_scope = processScope;
fs.writeFileSync(
path.join(trackerDir, "usage-limits-cache.json"),
JSON.stringify({ antigravity }),
"utf8",
);

const result = await fetchAntigravityLimits({
home: tmp,
commandRunner,
nowMs: Date.parse("2026-05-21T01:00:00.000Z"),
});

assert.deepEqual(result, { configured: false });
}
} finally {
fs.rmSync(tmp, { recursive: true, force: true });
}
});

it("does not use cached Antigravity quota after all cached windows reset", async () => {
const tmp = fs.mkdtempSync(path.join(os.tmpdir(), "tokentracker-antigravity-cache-expired-"));
try {
Expand All @@ -1402,6 +1441,7 @@ lang 123 me 22u IPv4 0x123 0t0 TCP 127.0.0.1:51234 (LISTEN)
path.join(trackerDir, "usage-limits-cache.json"),
JSON.stringify({
antigravity: {
process_scope: "current-user-v1",
primary_window: {
used_percent: 42,
reset_at: "2026-05-21T00:00:00.000Z",
Expand Down