add new agent components

tests/test_agent_context.py

@@ -40,6 +40,23 @@ class AgentContextTests(unittest.TestCase):
 
         self.assertEqual(snapshot.system_context['cacheBreaker'], '[CACHE_BREAKER: debug-token]')
 
+    def test_user_context_loads_plugin_cache_snapshot(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            workspace = Path(tmp_dir) / 'repo'
+            workspace.mkdir(parents=True)
+            plugin_cache = workspace / '.port_sessions' / 'plugin_cache.json'
+            plugin_cache.parent.mkdir(parents=True, exist_ok=True)
+            plugin_cache.write_text(
+                '{"plugins":[{"name":"demo-plugin","version":"1.2.3","enabled":true}]}',
+                encoding='utf-8',
+            )
+
+            snapshot = build_context_snapshot(AgentRuntimeConfig(cwd=workspace))
+
+        self.assertIn('pluginCache', snapshot.user_context)
+        self.assertIn('demo-plugin', snapshot.user_context['pluginCache'])
+        self.assertIn('1.2.3', snapshot.user_context['pluginCache'])
+
     @unittest.skipIf(shutil.which('git') is None, 'git is required for git context tests')
     def test_git_status_snapshot_contains_branch_and_status(self) -> None:
         with tempfile.TemporaryDirectory() as tmp_dir: