fix(gallery): correct HTDemucs checksum (#12919)

* fix(watchdog): track models on address-based external backends

A backend reached by address has no process, so StartProcess never registered it with the watchdog and LRU and group eviction never saw it loaded.

Fixes #12900

Assisted-by: Claude:claude-opus-5-5

* fix(gallery): correct HTDemucs checksum

Match the published SHA256 so HTDemucs downloads pass verification.

Fixes #12912

Assisted-by: Codex:gpt-6

---------

Co-authored-by: berce <75228263+bercedev@users.noreply.github.com>
Co-authored-by: localai-org-maint-bot <306269227+localai-org-maint-bot@users.noreply.github.com>

gallery/index.yaml

@@ -73694,7 +73694,7 @@
     - ggml
   files:
     - filename: audio-cpp/htdemucs-f16.gguf
-      sha256: 27763c59d7e65f64bbb326dc0c15beec952291954b70a813b7f4b83ebe6bd0c9
+      sha256: f8c54ba35df95aafea7881eac214b58ec18a73cbcb6ff5a90f4b762631a286b6
       uri: huggingface://audio-cpp/audio.cpp-gguf/HTDemucs-GGUF/htdemucs-f16.gguf
   overrides:
     backend: audio-cpp

pkg/model/initializers.go

@@ -230,6 +230,13 @@ func (ml *ModelLoader) spawnGRPCModel(backend, uri string, o *Options, modelID,
 		ml.wd.RegisterModelSize(modelID, o.modelSizeBytes)
 	}
 
+	// StartProcess registers a spawned backend with the watchdog. A backend
+	// reached by address has no process, so register it here or LRU and group
+	// eviction never see it loaded.
+	if ml.wd != nil && client.Process() == nil {
+		ml.wd.AddAddressModelMap(uri, modelID)
+	}
+
 	return client, nil
 }
 

pkg/model/initializers_external_address_test.go

@@ -0,0 +1,45 @@
+package model
+
+import (
+	"context"
+	"net"
+
+	pb "github.com/mudler/LocalAI/pkg/grpc/proto"
+	"github.com/mudler/LocalAI/pkg/system"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"google.golang.org/grpc"
+)
+
+// addressBackend stands in for an external backend that is already running at
+// an address, as configured in external_backends.json.
+type addressBackend struct{ pb.UnimplementedBackendServer }
+
+func (addressBackend) Health(context.Context, *pb.HealthMessage) (*pb.Reply, error) {
+	return &pb.Reply{Message: []byte("OK")}, nil
+}
+
+func (addressBackend) LoadModel(context.Context, *pb.ModelOptions) (*pb.Result, error) {
+	return &pb.Result{Success: true}, nil
+}
+
+var _ = Describe("address-based external backends", func() {
+	It("registers the loaded model with the watchdog", func() {
+		lis, err := net.Listen("tcp", "127.0.0.1:0")
+		Expect(err).ToNot(HaveOccurred())
+		server := grpc.NewServer()
+		pb.RegisterBackendServer(server, addressBackend{})
+		go func() { _ = server.Serve(lis) }()
+		DeferCleanup(server.Stop)
+
+		loader := NewModelLoader(&system.SystemState{Model: system.Model{ModelsPath: GinkgoT().TempDir()}})
+		wd := NewWatchDog(WithProcessManager(loader), WithLRULimit(1))
+		loader.SetWatchDog(wd)
+		options := NewOptions(WithLoadGRPCLoadModelOpts(&pb.ModelOptions{}))
+
+		address := lis.Addr().String()
+		_, err = loader.spawnGRPCModel("external", address, options, "model-a", "model-a", "")
+		Expect(err).ToNot(HaveOccurred())
+		Expect(wd.GetState().AddressModelMap).To(Equal(map[string]string{address: "model-a"}))
+	})
+})