feat(wave3): @mosaic/prdy TypeScript PRD wizard (#7)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

packages/prdy/tests/prd.test.ts

@@ -0,0 +1,36 @@
+import { promises as fs } from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+
+import { describe, expect, it } from 'vitest';
+
+import { createPrd, listPrds, loadPrd } from '../src/prd.js';
+
+describe('prd document lifecycle', () => {
+  it('creates and loads PRD documents', async () => {
+    const projectDir = await fs.mkdtemp(path.join(os.tmpdir(), 'prdy-project-'));
+
+    try {
+      const created = await createPrd({
+        name: 'User Authentication',
+        projectPath: projectDir,
+        template: 'feature',
+      });
+
+      expect(created.title).toBe('User Authentication');
+      expect(created.status).toBe('draft');
+      expect(created.id).toMatch(/^user-authentication-\d{8}-\d{6}$/);
+
+      const loaded = await loadPrd(projectDir);
+      expect(loaded.id).toBe(created.id);
+      expect(loaded.title).toBe(created.title);
+      expect(loaded.sections.length).toBeGreaterThan(0);
+
+      const listed = await listPrds(projectDir);
+      expect(listed).toHaveLength(1);
+      expect(listed[0]?.id).toBe(created.id);
+    } finally {
+      await fs.rm(projectDir, { recursive: true, force: true });
+    }
+  });
+});