fix(coding): resolve packaged Pi imports from runtime root

tests/unit/pi-agent-server-process-real.test.ts

@@ -1,6 +1,6 @@
 // @vitest-environment node
 
-import { mkdtemp, mkdir, rm, writeFile } from 'node:fs/promises';
+import { copyFile, mkdtemp, mkdir, rm, writeFile } from 'node:fs/promises';
 import { createServer, type ServerResponse } from 'node:http';
 import { tmpdir } from 'node:os';
 import path from 'node:path';
@@ -165,6 +165,32 @@ afterEach(async () => {
 });
 
 describe('Pi Agent Server real process', () => {
+  it('resolves runtime packages when the server resource is outside the project module tree', async () => {
+    const root = await mkdtemp(path.join(tmpdir(), 'makelore-pi-agent-server-packaged-layout-'));
+    roots.push(root);
+    const resourcesDir = path.join(root, 'product-resources', 'resources');
+    const configDir = path.join(root, 'config');
+    await Promise.all([
+      mkdir(resourcesDir, { recursive: true }),
+      mkdir(configDir, { recursive: true }),
+    ]);
+    const serverPath = path.join(resourcesDir, 'pi-agent-server.mjs');
+    await copyFile(path.resolve('resources/pi-agent-server.mjs'), serverPath);
+    const runtimeRoot = path.resolve('node_modules/@earendil-works/pi-coding-agent');
+    const server = new PiAgentServerProcess({
+      executablePath: process.execPath,
+      serverPath,
+      runtimeRoot,
+      configDir,
+    });
+    try {
+      await expect(server.start()).resolves.toBeUndefined();
+      expect(server.processId).toBeTypeOf('number');
+    } finally {
+      await server.stop().catch(() => undefined);
+    }
+  }, 10_000);
+
   it('executes two write-leased Bash calls without waiting for the HTTP idle timeout', async () => {
     const root = await mkdtemp(path.join(tmpdir(), 'makelore-pi-agent-server-bash-batch-'));
     roots.push(root);