feat: vendor permission system source

pi-permission-system/test/permission-request-id.test.ts

@@ -0,0 +1,18 @@
+import { describe, expect, it } from "vitest";
+
+import { createPermissionRequestId } from "#src/permission-request-id";
+
+describe("createPermissionRequestId", () => {
+  it("prefixes the id so it is distinguishable from an SDK tool call id", () => {
+    expect(createPermissionRequestId()).toMatch(
+      /^perm-[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/,
+    );
+  });
+
+  it("mints a distinct id on every call", () => {
+    const ids = new Set(
+      Array.from({ length: 100 }, () => createPermissionRequestId()),
+    );
+    expect(ids.size).toBe(100);
+  });
+});