fix(#829): enforce repository-wide runtime launch choke point

packages/coord/src/__tests__/runtime-launch-gate.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it } from 'vitest';
+
+import { resolveLaunchCommand } from '../runner.js';
+
+describe('coord consequential-runtime launch gate', () => {
+  it('routes default and direct configured Claude commands through mosaic', () => {
+    expect(resolveLaunchCommand('claude', 'continue', undefined)).toEqual([
+      'mosaic',
+      'claude',
+      '-p',
+      'continue',
+    ]);
+    expect(resolveLaunchCommand('claude', 'continue', ['claude', '-p', '{prompt}'])).toEqual([
+      'mosaic',
+      'claude',
+      '-p',
+      'continue',
+    ]);
+  });
+
+  it('preserves an already-gated Claude command and rejects unknown launchers', () => {
+    expect(
+      resolveLaunchCommand('claude', 'continue', ['mosaic', 'yolo', 'claude', '{prompt}']),
+    ).toEqual(['mosaic', 'yolo', 'claude', 'continue']);
+    expect(() => resolveLaunchCommand('claude', 'continue', ['custom-launcher'])).toThrow(
+      /must use `mosaic claude`/,
+    );
+  });
+
+  it('does not change the out-of-scope Codex command contract', () => {
+    expect(resolveLaunchCommand('codex', 'continue', undefined)).toEqual([
+      'codex',
+      '-p',
+      'continue',
+    ]);
+    expect(resolveLaunchCommand('codex', 'continue', ['codex', '{prompt}'])).toEqual([
+      'codex',
+      'continue',
+    ]);
+  });
+});