diff --git a/.github/workflows/build-reusable.yml b/.github/workflows/build-reusable.yml
index a23439e..eeab519 100644
--- a/.github/workflows/build-reusable.yml
+++ b/.github/workflows/build-reusable.yml
@@ -204,7 +204,7 @@ jobs:
           # Create a virtual environment
           uv venv
           source .venv/bin/activate || source .venv/Scripts/activate
-          
+
           # Install the built wheels
           if [[ "${{ matrix.os }}" == ubuntu-* ]]; then
             uv pip install packages/leann-core/dist/*.whl
@@ -226,7 +226,7 @@ jobs:
         run: |
           # Activate virtual environment
           source .venv/bin/activate || source .venv/Scripts/activate
-          
+
           # Run all tests
           pytest tests/
 
@@ -234,7 +234,7 @@ jobs:
         run: |
           # Activate virtual environment
           source .venv/bin/activate || source .venv/Scripts/activate
-          
+
           # Run distance function tests if available
           if [ -f test/sanity_checks/test_distance_functions.py ]; then
             echo "Running distance function sanity checks..."
diff --git a/.gitignore b/.gitignore
index 6b9890d..3d49d4d 100755
--- a/.gitignore
+++ b/.gitignore
@@ -86,3 +86,5 @@ packages/leann-backend-diskann/third_party/DiskANN/_deps/
 *.passages.json
 
 batchtest.py
+tests/__pytest_cache__/
+tests/__pycache__/
diff --git a/packages/leann-backend-hnsw/CMakeLists.txt b/packages/leann-backend-hnsw/CMakeLists.txt
index 100e70b..1f41393 100644
--- a/packages/leann-backend-hnsw/CMakeLists.txt
+++ b/packages/leann-backend-hnsw/CMakeLists.txt
@@ -10,12 +10,12 @@ if(APPLE)
     set(OpenMP_C_LIB_NAMES "omp")
     set(OpenMP_CXX_LIB_NAMES "omp")
     set(OpenMP_omp_LIBRARY "/opt/homebrew/opt/libomp/lib/libomp.dylib")
-    
+
     # Force use of system libc++ to avoid version mismatch
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++")
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -stdlib=libc++")
-    
+
     # Set minimum macOS version for better compatibility
     set(CMAKE_OSX_DEPLOYMENT_TARGET "11.0" CACHE STRING "Minimum macOS version")
 endif()
diff --git a/packages/leann-core/src/leann/__init__.py b/packages/leann-core/src/leann/__init__.py
index 25cbc51..7ac156d 100644
--- a/packages/leann-core/src/leann/__init__.py
+++ b/packages/leann-core/src/leann/__init__.py
@@ -8,6 +8,10 @@ if platform.system() == "Darwin":
     os.environ["MKL_NUM_THREADS"] = "1"
     os.environ["KMP_DUPLICATE_LIB_OK"] = "TRUE"
     os.environ["KMP_BLOCKTIME"] = "0"
+    # Additional fixes for PyTorch/sentence-transformers on macOS ARM64 only in CI
+    if os.environ.get("CI") == "true":
+        os.environ["PYTORCH_ENABLE_MPS_FALLBACK"] = "0"
+        os.environ["TOKENIZERS_PARALLELISM"] = "false"
 
 from .api import LeannBuilder, LeannChat, LeannSearcher
 from .registry import BACKEND_REGISTRY, autodiscover_backends
diff --git a/packages/leann-core/src/leann/api.py b/packages/leann-core/src/leann/api.py
index 5848b87..9efefde 100644
--- a/packages/leann-core/src/leann/api.py
+++ b/packages/leann-core/src/leann/api.py
@@ -23,6 +23,11 @@ from .registry import BACKEND_REGISTRY
 logger = logging.getLogger(__name__)
 
 
+def get_registered_backends() -> list[str]:
+    """Get list of registered backend names."""
+    return list(BACKEND_REGISTRY.keys())
+
+
 def compute_embeddings(
     chunks: list[str],
     model_name: str,