feat(coding): add core host api composition

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

@@ -10,6 +10,7 @@ import type { AgentBrowserModule } from '../../electron/agent-browser';
 import {
   CodingProductHostError,
   createCodingProductHost,
+  type CodingProductHostOptions,
 } from '../../electron/api/coding-product-services';
 import { CodingAttachmentStore } from '../../electron/coding-projects/attachment-store';
 import { createCodingConversationStore } from '../../electron/coding-projects/conversation-store';
@@ -65,6 +66,35 @@ function productTools(root: string): PiProductTools {
   });
 }
 
+function projectService(
+  root: string,
+  active = true,
+): CodingProductHostOptions['projects'] {
+  const project = {
+    id: 'project-a',
+    path: root,
+    name: 'project-a',
+    createdAt: '2026-08-23T00:00:00.000Z',
+    updatedAt: '2026-08-23T00:00:00.000Z',
+    lastOpenedAt: '2026-08-23T00:00:00.000Z',
+  };
+  return {
+    getActiveProject: async () => active ? project : null,
+    findActiveConversation: async (id) => {
+      if (!active) throw new Error('No active project');
+      const conversation = await createCodingConversationStore(root).get(id);
+      if (!conversation) {
+        throw new CodingProductHostError(
+          404,
+          'CODING_CONVERSATION_NOT_FOUND',
+          'Coding Conversation does not exist',
+        );
+      }
+      return { project, conversation };
+    },
+  };
+}
+
 async function git(root: string, ...args: string[]): Promise<void> {
   await exec('git', ['-C', root, ...args], { windowsHide: true });
 }
@@ -78,7 +108,7 @@ describe('PI-105 product Host composition', () => {
     const root = await configuredProject();
     const tools = productTools(root);
     const host = createCodingProductHost({
-      getActiveProject: async () => ({ id: 'project-a', path: root }),
+      projects: projectService(root),
       productTools: tools,
       listPiCommands: async () => ({
         commands: [
@@ -113,7 +143,7 @@ describe('PI-105 product Host composition', () => {
     await writeFile(path.join(root, 'notes.txt'), 'baseline\n', 'utf8');
     const tools = productTools(root);
     const host = createCodingProductHost({
-      getActiveProject: async () => ({ id: 'project-a', path: root }),
+      projects: projectService(root),
       productTools: tools,
     });
     await tools.beginRun({ conversationId, runId: 'run-a', projectPath: root });
@@ -145,7 +175,7 @@ describe('PI-105 product Host composition', () => {
 
     const tools = productTools(root);
     const host = createCodingProductHost({
-      getActiveProject: async () => ({ id: 'project-a', path: root }),
+      projects: projectService(root),
       productTools: tools,
     });
     await tools.beginRun({ conversationId, runId: 'run-conflict', projectPath: root });
@@ -165,7 +195,7 @@ describe('PI-105 product Host composition', () => {
     const root = await configuredProject();
     const tools = productTools(root);
     const unavailable = createCodingProductHost({
-      getActiveProject: async () => null,
+      projects: projectService(root, false),
       productTools: tools,
     });
     await expect(unavailable.fileStatus()).rejects.toMatchObject<CodingProductHostError>({
@@ -173,7 +203,7 @@ describe('PI-105 product Host composition', () => {
     });
 
     const host = createCodingProductHost({
-      getActiveProject: async () => ({ id: 'project-a', path: root }),
+      projects: projectService(root),
       productTools: tools,
     });
     await expect(host.listSkills('missing')).rejects.toMatchObject<CodingProductHostError>({