feat: strengthen install lifecycle and target adapters (#512)

* fix: strengthen install lifecycle adapters

* fix: restore template content on uninstall

scripts/lib/install-targets/antigravity-project.js

@@ -1,4 +1,10 @@
-const { createInstallTargetAdapter } = require('./helpers');
+const path = require('path');
+
+const {
+  createFlatRuleOperations,
+  createInstallTargetAdapter,
+  createManagedScaffoldOperation,
+} = require('./helpers');
 
 module.exports = createInstallTargetAdapter({
   id: 'antigravity-project',
@@ -6,4 +12,58 @@ module.exports = createInstallTargetAdapter({
   kind: 'project',
   rootSegments: ['.agent'],
   installStatePathSegments: ['ecc-install-state.json'],
+  planOperations(input, adapter) {
+    const modules = Array.isArray(input.modules)
+      ? input.modules
+      : (input.module ? [input.module] : []);
+    const {
+      repoRoot,
+      projectRoot,
+      homeDir,
+    } = input;
+    const planningInput = {
+      repoRoot,
+      projectRoot,
+      homeDir,
+    };
+    const targetRoot = adapter.resolveRoot(planningInput);
+
+    return modules.flatMap(module => {
+      const paths = Array.isArray(module.paths) ? module.paths : [];
+      return paths.flatMap(sourceRelativePath => {
+        if (sourceRelativePath === 'rules') {
+          return createFlatRuleOperations({
+            moduleId: module.id,
+            repoRoot,
+            sourceRelativePath,
+            destinationDir: path.join(targetRoot, 'rules'),
+          });
+        }
+
+        if (sourceRelativePath === 'commands') {
+          return [
+            createManagedScaffoldOperation(
+              module.id,
+              sourceRelativePath,
+              path.join(targetRoot, 'workflows'),
+              'preserve-relative-path'
+            ),
+          ];
+        }
+
+        if (sourceRelativePath === 'agents') {
+          return [
+            createManagedScaffoldOperation(
+              module.id,
+              sourceRelativePath,
+              path.join(targetRoot, 'skills'),
+              'preserve-relative-path'
+            ),
+          ];
+        }
+
+        return [adapter.createScaffoldOperation(module.id, sourceRelativePath, planningInput)];
+      });
+    });
+  },
 });