Q67: in-flight requests reserve monthly quota

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/unit/quota-reservation.test.ts

@@ -0,0 +1,48 @@
+import { randomUUID } from "node:crypto";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { describe, expect, test } from "vitest";
+import { DatabaseConnection } from "../../src/main/database/connection";
+import { OrganizationService } from "../../src/main/services/organization-service";
+import { ProviderService } from "../../src/main/services/provider-service";
+import { providerAdapters } from "../../src/main/services/provider-adapters";
+import { PROVIDER_MONTHLY_LIMIT_MESSAGE } from "../../src/shared/provider-runtime-domain";
+import { PROVIDER_DATA_POLICY } from "../../src/shared/domain";
+import type { AgentTurnResult } from "../../src/main/services/provider-tool-turn";
+
+const testVault = {
+  encryptSecret: (secret: string) => Buffer.from(secret, "utf8"),
+  decryptSecret: (ciphertext: Buffer) => ciphertext.toString("utf8"),
+};
+
+describe("monthly quota reservation", () => {
+  test("with one request left, concurrent calls cannot both take it", async () => {
+    let release = () => {};
+    const gate = new Promise<void>((resolve) => { release = resolve; });
+    let started = 0;
+    const turn = async (): Promise<AgentTurnResult> => {
+      started += 1;
+      await gate;
+      return { text: "done", toolCalls: [], rawResponseJson: "{}" };
+    };
+    const connection = new DatabaseConnection(join(tmpdir(), `ac-quota-${randomUUID()}.db`));
+    const providers = new ProviderService(connection.db, providerAdapters, testVault, undefined, turn);
+    let orgId = "";
+    let providerId = "";
+    connection.transaction(() => {
+      orgId = new OrganizationService(connection.db).createOrganization({ organizationName: "Acme", employeeName: "Dana", mission: "m", goal: "g" });
+      providerId = (connection.db.prepare("select id from providers where org_id = ? and provider_key = 'openai'").get(orgId) as { id: string }).id;
+      providers.saveCredential({ orgId, providerId, secret: "sk-test", model: "gpt-5.4" });
+      providers.updatePolicy({ orgId, providerId, dataPolicy: PROVIDER_DATA_POLICY.STANDARD, backgroundEnabled: false, monthlyRequestLimit: 1, workspaceScope: "organization", contextWindowTokens: 128_000 });
+    });
+    const call = () => providers.runToolTurn({ orgId, providerId, workspaceId: null, instructions: "i", messages: [{ role: "user", text: "u" }], tools: [] });
+    const first = call();
+    const second = call();
+    await expect(second).rejects.toThrow(PROVIDER_MONTHLY_LIMIT_MESSAGE);
+    release();
+    await first;
+    expect(started).toBe(1);
+    await expect(call()).rejects.toThrow(PROVIDER_MONTHLY_LIMIT_MESSAGE);
+    connection.close();
+  });
+});