feat: integrate marketplace plugins with coding runtime

tests/unit/pi-product-tools.test.ts

@@ -246,6 +246,20 @@ describe('PI-090 product tools', () => {
     });
   });
 
+  it('preserves an uninstalled unknown assignment in project config without blocking projections', async () => {
+    const root = await temporaryRoot('makelore-pi-removed-skill-');
+    const tools = new PiProductTools({
+      browser: {} as AgentBrowserModule,
+      attachments: new CodingAttachmentStore(path.join(root, 'attachments')),
+      bundledSkillsDir: path.resolve('resources/coding-skills'),
+      getPluginSkillSources: async () => [],
+    });
+
+    await expect(tools.listSkills(['removed-plugin-skill'])).resolves.not.toContainEqual(
+      expect.objectContaining({ id: 'removed-plugin-skill' }),
+    );
+  });
+
   it('projects effective plugin Skills in the worker runtime context', async () => {
     const root = await temporaryRoot('makelore-pi-runtime-context-');
     const tools = new PiProductTools({