fix: sync Grok empty-group preservation

sdks/node/src/plugins/grok.ts

@@ -241,14 +241,19 @@ function removeManaged(
       result.push(group);
       continue;
     }
+    let groupChanged = false;
     const handlers = group.hooks.filter((handler) => {
       const managedId = managedAgentId(handler, scriptName);
       const remove = managedId !== undefined
         && (agentId === undefined || sameAgentId(managedId, agentId));
-      if (remove) changed = true;
+      if (remove) {
+        changed = true;
+        groupChanged = true;
+      }
       return !remove;
     });
-    if (handlers.length > 0) result.push(handlers.length === group.hooks.length ? group : { ...group, hooks: handlers });
+    if (!groupChanged) result.push(group);
+    else if (handlers.length > 0) result.push({ ...group, hooks: handlers });
   }
   return { groups: result, changed };
 }

sdks/node/test/grok-plugin.test.mjs

@@ -351,17 +351,17 @@ test('Grok install replaces stale Elydora handlers for every agent', async () =>
   }
 });
 
-test('Grok uninstall preserves an untouched empty native event', async () => {
+test('Grok uninstall preserves an untouched empty native group', async () => {
   const fixture = await createFixture({ config: { owner: 'user' } });
   try {
     assert.equal(fixture.installResult.code, 0, fixture.installResult.stderr);
     const config = JSON.parse(await readFile(fixture.configPath, 'utf-8'));
-    config.hooks.PreToolUse = [];
+    config.hooks.PreToolUse.unshift({ hooks: [], label: 'keep empty group' });
     await writeFile(fixture.configPath, JSON.stringify(config, null, 2));
     const result = await runPlugin(fixture, 'uninstall', 'agent-1');
     assert.equal(result.code, 0, result.stderr);
     const remaining = JSON.parse(await readFile(fixture.configPath, 'utf-8'));
-    assert.deepEqual(remaining.hooks.PreToolUse, []);
+    assert.deepEqual(remaining.hooks.PreToolUse, [{ hooks: [], label: 'keep empty group' }]);
     assert.equal(remaining.hooks.PostToolUse, undefined);
   } finally {
     await fixture.close();