fix(plugins): expose enabled skills for agent assignment

tests/unit/coding-product-services.test.ts

@@ -218,6 +218,56 @@ describe('PI-105 product Host composition', () => {
     }));
   });
 
+  it('offers an enabled Web Search Skill before its first Agent assignment', async () => {
+    const root = await configuredProject(['agent-browser']);
+    const tools = new PiProductTools({
+      browser: {} as AgentBrowserModule,
+      attachments: new CodingAttachmentStore(path.join(root, 'attachments')),
+      bundledSkillsDir: path.resolve('resources/coding-skills'),
+      pluginSkillSources: [{
+        id: 'makelore-web-search',
+        pluginId: 'makelore.web-search',
+        directory: path.resolve(
+          'resources/coding-plugins/web-search/skills/makelore-web-search',
+        ),
+      }],
+    });
+    const effectiveResolver = {
+      resolve: vi.fn(async () => ({
+        accountSessionId: 'account-a\u00001',
+        projectId: 'project-a',
+        pluginReleaseIds: [],
+        effectiveSkillIds: [],
+        skillEntries: [],
+        toolDefinitions: [],
+        runtimePolicies: [],
+        unavailableReasons: [{
+          pluginId: 'makelore.web-search',
+          code: 'skill_unassigned' as const,
+          message: 'Plugin Skill is not assigned',
+        }],
+      })),
+      getSkillSources: vi.fn(async () => []),
+      getPolicyState: vi.fn(() => ({
+        status: 'current' as const, catalog: null, revision: 1, lastVerifiedAt: 1,
+      })),
+    };
+    const host = createCodingProductHost({
+      projects: projectService(root),
+      productTools: tools,
+      effectiveResolver,
+      getEnabledPluginIds: async () => ['makelore.web-search'],
+    });
+
+    await expect(host.listSkills()).resolves.toContainEqual(expect.objectContaining({
+      id: 'makelore-web-search', selected: false, available: true, effective: false,
+    }));
+    expect(effectiveResolver.resolve).not.toHaveBeenCalled();
+    await expect(host.listSkills('builder')).resolves.not.toContainEqual(
+      expect.objectContaining({ id: 'makelore-web-search', available: true }),
+    );
+  });
+
   it('reads exact-run changes from the same PiProductTools tracker instance', async () => {
     const root = await configuredProject();
     await writeFile(path.join(root, 'notes.txt'), 'baseline\n', 'utf8');