Include mlx.metallib in release zip and bootstrap extraction

MLX compiles Metal GPU kernels into mlx.metallib at build time. The binary
has a hardcoded fallback path (from the CI build directory) that won't exist
on user machines. MLX's runtime search checks for a colocated mlx.metallib
(same directory as the binary) first, so shipping it alongside the binary
ensures it's always found.

Signed-off-by: Michael Yuan <michael@secondstate.io>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: juntao

.github/workflows/release.yml

@@ -97,6 +97,9 @@ jobs:
         run: |
           mkdir ${{ matrix.asset-name }}
           cp target/release/asr ${{ matrix.asset-name }}/asr
+          if [ "${{ matrix.backend }}" = "mlx" ]; then
+            cp target/release/build/qwen3_asr-*/out/lib/mlx.metallib ${{ matrix.asset-name }}/
+          fi
           zip -r ${{ matrix.asset-name }}.zip ${{ matrix.asset-name }}
 
       - name: Upload release asset

skills/bootstrap.sh

@@ -100,6 +100,10 @@ download_binary() {
     unzip -q "${temp_dir}/${zip_name}" -d "${temp_dir}"
     cp "${temp_dir}/${asset_name}/asr" "${SCRIPTS_DIR}/asr"
     chmod +x "${SCRIPTS_DIR}/asr"
+    # Copy mlx.metallib if present (macOS MLX backend)
+    if [ -f "${temp_dir}/${asset_name}/mlx.metallib" ]; then
+        cp "${temp_dir}/${asset_name}/mlx.metallib" "${SCRIPTS_DIR}/mlx.metallib"
+    fi
 
     rm -rf "$temp_dir"
     echo "Binary installed to ${SCRIPTS_DIR}/asr" >&2