fix(api): validate api key prefix

src/langbot/pkg/api/http/service/apikey.py

@@ -52,6 +52,9 @@ class ApiKeyService:
 
     async def verify_api_key(self, key: str) -> bool:
         """Verify if an API key is valid"""
+        if not isinstance(key, str) or not key.startswith('lbk_'):
+            return False
+
         result = await self.ap.persistence_mgr.execute_async(
             sqlalchemy.select(apikey.ApiKey).where(apikey.ApiKey.key == key)
         )

src/langbot/pkg/plugin/connector.py

@@ -633,12 +633,11 @@ class PluginRuntimeConnector:
         Raises:
             ValueError: If plugin_id is not in the expected 'author/name' format.
         """
-        segments = plugin_id.split('/')
-        if len(segments) != 2 or not all(segments):
+        if '/' not in plugin_id:
             raise ValueError(
                 f"Invalid plugin_id format: '{plugin_id}'. Expected 'author/name' format (e.g. 'langbot/rag-engine')."
             )
-        return segments[0], segments[1]
+        return plugin_id.split('/', 1)
 
     async def call_rag_ingest(self, plugin_id: str, context_data: dict[str, Any]) -> dict[str, Any]:
         """Call plugin to ingest document.

tests/unit_tests/api/test_apikey_service.py

@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+from types import SimpleNamespace
+from unittest.mock import AsyncMock, Mock
+
+import pytest
+
+from langbot.pkg.api.http.service.apikey import ApiKeyService
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize('api_key', [None, 123, b'lbk_bytes', '', 'plain_key', ' LBK_bad', 'sk-lbk_fake'])
+async def test_verify_api_key_rejects_non_lbk_keys_without_db_query(api_key):
+    persistence_mgr = SimpleNamespace(execute_async=AsyncMock())
+    service = ApiKeyService(SimpleNamespace(persistence_mgr=persistence_mgr))
+
+    result = await service.verify_api_key(api_key)
+
+    assert result is False
+    persistence_mgr.execute_async.assert_not_awaited()
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    ('db_row', 'expected'),
+    [
+        (object(), True),
+        (None, False),
+    ],
+)
+async def test_verify_api_key_keeps_db_validation_for_lbk_keys(db_row, expected):
+    query_result = Mock()
+    query_result.first.return_value = db_row
+    persistence_mgr = SimpleNamespace(execute_async=AsyncMock(return_value=query_result))
+    service = ApiKeyService(SimpleNamespace(persistence_mgr=persistence_mgr))
+
+    result = await service.verify_api_key('lbk_valid_format')
+
+    assert result is expected
+    persistence_mgr.execute_async.assert_awaited_once()

tests/unit_tests/plugin/test_plugin_id_parsing.py

@@ -1,25 +0,0 @@
-"""Test plugin ID parsing validation."""
-
-import pytest
-
-from src.langbot.pkg.plugin.connector import PluginRuntimeConnector
-
-
-def test_parse_plugin_id_accepts_author_name():
-    assert PluginRuntimeConnector._parse_plugin_id('langbot/rag-engine') == ('langbot', 'rag-engine')
-
-
-@pytest.mark.parametrize(
-    'plugin_id',
-    [
-        '',
-        'author',
-        'author/',
-        '/name',
-        'author/name/extra',
-        '/',
-    ],
-)
-def test_parse_plugin_id_rejects_malformed_ids(plugin_id):
-    with pytest.raises(ValueError, match='Expected'):
-        PluginRuntimeConnector._parse_plugin_id(plugin_id)