feat(backends): darwin build for the localvqe backend (acoustic echo cancellation) (#10512)

feat(backends): darwin build for the localvqe backend

LocalVQE (acoustic echo cancellation / noise suppression / dereverberation)
already builds on Darwin - its Makefile takes the OS=Darwin branch with
GGML_METAL=OFF (upstream is CPU + Vulkan only), producing a native arm64 CPU
image. It was just never wired into CI.

- .github/backend-matrix.yml: add localvqe to includeDarwin (build-type metal,
  lang go) - the darwin/arm64 build profile; the backend itself stays CPU.
- backend/index.yaml: metal: capability + concrete metal-localvqe(-development)
  entries pointing at the -metal-darwin-arm64-localvqe images.
- backend/go/localvqe/Makefile: note on the existing Darwin branch (also the
  per-backend change the CI path filter needs to build it here).


Assisted-by: Claude:opus-4.8 [Claude Code]

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>

Author: localai-bot

.github/backend-matrix.yml

@@ -4941,6 +4941,12 @@ includeDarwin:
     tag-suffix: "-metal-darwin-arm64-sam3-cpp"
     build-type: "metal"
     lang: "go"
+  # LocalVQE has no Metal path; on Apple Silicon it builds CPU-only (GGML_METAL
+  # OFF) but is still a native arm64 image. Uses the darwin/metal build profile.
+  - backend: "localvqe"
+    tag-suffix: "-metal-darwin-arm64-localvqe"
+    build-type: "metal"
+    lang: "go"
   - backend: "voxtral"
     tag-suffix: "-metal-darwin-arm64-voxtral"
     build-type: "metal"

backend/go/localvqe/Makefile

@@ -32,6 +32,8 @@ endif
 ifeq ($(BUILD_TYPE),vulkan)
 	CMAKE_ARGS+=-DGGML_VULKAN=ON -DLOCALVQE_VULKAN=ON
 else ifeq ($(OS),Darwin)
+	# Apple Silicon: CPU-only (no Metal upstream); built + published as an arm64
+	# image by CI (includeDarwin in .github/backend-matrix.yml) for macOS install.
 	CMAKE_ARGS+=-DGGML_METAL=OFF
 endif
 

backend/index.yaml

@@ -1057,6 +1057,8 @@
     nvidia-l4t: "vulkan-localvqe"
     nvidia-l4t-cuda-12: "vulkan-localvqe"
     nvidia-l4t-cuda-13: "vulkan-localvqe"
+    # Apple Silicon: CPU build (LocalVQE has no Metal path); still arm64-native.
+    metal: "metal-localvqe"
 - &privacyfilter
   name: "privacy-filter"
   alias: "privacy-filter"
@@ -4149,6 +4151,16 @@
   uri: "quay.io/go-skynet/local-ai-backends:master-gpu-vulkan-localvqe"
   mirrors:
     - localai/localai-backends:master-gpu-vulkan-localvqe
+- !!merge <<: *localvqecpp
+  name: "metal-localvqe"
+  uri: "quay.io/go-skynet/local-ai-backends:latest-metal-darwin-arm64-localvqe"
+  mirrors:
+    - localai/localai-backends:latest-metal-darwin-arm64-localvqe
+- !!merge <<: *localvqecpp
+  name: "metal-localvqe-development"
+  uri: "quay.io/go-skynet/local-ai-backends:master-metal-darwin-arm64-localvqe"
+  mirrors:
+    - localai/localai-backends:master-metal-darwin-arm64-localvqe
 ## kokoro
 - !!merge <<: *kokoro
   name: "kokoro-development"