fix: namespace claude managed install paths

tests/lib/install-targets.test.js

@@ -65,6 +65,42 @@ function runTests() {
     assert.strictEqual(statePath, path.join(homeDir, '.claude', 'ecc', 'install-state.json'));
   })) passed++; else failed++;
 
+  if (test('plans claude rules and skills under ECC-managed subdirectories', () => {
+    const repoRoot = path.join(__dirname, '..', '..');
+    const homeDir = '/Users/example';
+
+    const plan = planInstallTargetScaffold({
+      target: 'claude',
+      repoRoot,
+      homeDir,
+      modules: [
+        {
+          id: 'rules-core',
+          paths: ['rules'],
+        },
+        {
+          id: 'workflow-quality',
+          paths: ['skills/tdd-workflow'],
+        },
+      ],
+    });
+
+    assert.ok(
+      plan.operations.some(operation => (
+        normalizedRelativePath(operation.sourceRelativePath) === 'rules'
+        && operation.destinationPath === path.join(homeDir, '.claude', 'rules', 'ecc')
+      )),
+      'Should install bundled Claude rules under rules/ecc'
+    );
+    assert.ok(
+      plan.operations.some(operation => (
+        normalizedRelativePath(operation.sourceRelativePath) === 'skills/tdd-workflow'
+        && operation.destinationPath === path.join(homeDir, '.claude', 'skills', 'ecc', 'tdd-workflow')
+      )),
+      'Should install bundled Claude skills under skills/ecc'
+    );
+  })) passed++; else failed++;
+
   if (test('plans scaffold operations and flattens native target roots', () => {
     const repoRoot = path.join(__dirname, '..', '..');
     const projectRoot = '/workspace/app';