Resolve db_path before handing it to lancedb.connect_async. Closes #355

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog
 ## [Unreleased]
 
+### Fixed
+
+- **`Store` and CLI commands accept relative database paths again.** The 0.43 migration to `lancedb.connect_async` started routing the path through LanceDB's async URI sanitizer, which treats anything that doesn't look like an absolute local path as a possibly-cloud URI and demands `api_key`/`region`, surfacing as `ValueError: An api_key is required when connecting to LanceDb Cloud`. The path is now resolved to absolute before being handed to LanceDB.
+
 ## [0.43.0] - 2026-04-24
 
 ### Changed

haiku_rag_slim/haiku/rag/store/engine.py

@@ -70,7 +70,7 @@ async def connect_lancedb(
     else:
         if db_path is None:
             raise ValueError("No lancedb.uri configured and no db_path provided")
-        return await lancedb.connect_async(db_path)
+        return await lancedb.connect_async(db_path.resolve())
 
 
 class DocumentRecord(LanceModel):

tests/test_lancedb_connection.py

@@ -49,7 +49,20 @@ class TestConnectLancedb:
             "haiku.rag.store.engine.lancedb.connect_async", new_callable=AsyncMock
         ) as mock_connect:
             await connect_lancedb(config, db_path=temp_db_path)
-            mock_connect.assert_called_once_with(temp_db_path)
+            mock_connect.assert_called_once_with(temp_db_path.resolve())
+
+    @pytest.mark.asyncio
+    async def test_local_resolves_relative_db_path(self, tmp_path, monkeypatch):
+        from pathlib import Path
+
+        monkeypatch.chdir(tmp_path)
+        relative = Path("db/rag/rag.lancedb")
+        config = AppConfig(lancedb=LanceDBConfig(uri=""))
+        with patch(
+            "haiku.rag.store.engine.lancedb.connect_async", new_callable=AsyncMock
+        ) as mock_connect:
+            await connect_lancedb(config, db_path=relative)
+            mock_connect.assert_called_once_with((tmp_path / relative).resolve())
 
     @pytest.mark.asyncio
     async def test_cloud_passes_uri_api_key_region(self):