types: ConfigV2 and RootFS (#13504)

Refactored the ConfigV2 and RootFS types from server/images.go to a new types/model/config.go file under the model package. Updated all references to use model.ConfigV2 and model.RootFS. This allows for use in other projects without worrying about compiling the c code in the llama package.

server/create.go

@@ -42,10 +42,10 @@ var (
 )
 
 func (s *Server) CreateHandler(c *gin.Context) {
-	config := &ConfigV2{
+	config := &model.ConfigV2{
 		OS:           "linux",
 		Architecture: "amd64",
-		RootFS: RootFS{
+		RootFS: model.RootFS{
 			Type: "layers",
 		},
 	}
@@ -126,7 +126,7 @@ func (s *Server) CreateHandler(c *gin.Context) {
 						configPath, pErr := GetBlobsPath(manifest.Config.Digest)
 						if pErr == nil {
 							if cfgFile, fErr := os.Open(configPath); fErr == nil {
-								var baseConfig ConfigV2
+								var baseConfig model.ConfigV2
 								if decErr := json.NewDecoder(cfgFile).Decode(&baseConfig); decErr == nil {
 									if config.Renderer == "" {
 										config.Renderer = baseConfig.Renderer
@@ -459,7 +459,7 @@ func kvFromLayers(baseLayers []*layerGGML) (ggml.KV, error) {
 	return ggml.KV{}, fmt.Errorf("no base model was found")
 }
 
-func createModel(r api.CreateRequest, name model.Name, baseLayers []*layerGGML, config *ConfigV2, fn func(resp api.ProgressResponse)) (err error) {
+func createModel(r api.CreateRequest, name model.Name, baseLayers []*layerGGML, config *model.ConfigV2, fn func(resp api.ProgressResponse)) (err error) {
 	var layers []Layer
 	for _, layer := range baseLayers {
 		if layer.GGML != nil {
@@ -789,7 +789,7 @@ func setMessages(layers []Layer, m []api.Message) ([]Layer, error) {
 	return layers, nil
 }
 
-func createConfigLayer(layers []Layer, config ConfigV2) (*Layer, error) {
+func createConfigLayer(layers []Layer, config model.ConfigV2) (*Layer, error) {
 	digests := make([]string, len(layers))
 	for i, layer := range layers {
 		digests[i] = layer.Digest

server/images.go

@@ -54,7 +54,7 @@ type registryOptions struct {
 
 type Model struct {
 	Name           string `json:"name"`
-	Config         ConfigV2
+	Config         model.ConfigV2
 	ShortName      string
 	ModelPath      string
 	ParentModel    string
@@ -266,35 +266,6 @@ func (m *Model) String() string {
 	return modelfile.String()
 }
 
-type ConfigV2 struct {
-	ModelFormat   string   `json:"model_format"`
-	ModelFamily   string   `json:"model_family"`
-	ModelFamilies []string `json:"model_families"`
-	ModelType     string   `json:"model_type"` // shown as Parameter Size
-	FileType      string   `json:"file_type"`  // shown as Quantization Level
-	Renderer      string   `json:"renderer,omitempty"`
-	Parser        string   `json:"parser,omitempty"`
-
-	RemoteHost  string `json:"remote_host,omitempty"`
-	RemoteModel string `json:"remote_model,omitempty"`
-
-	// used for remotes
-	Capabilities []string `json:"capabilities,omitempty"`
-	ContextLen   int      `json:"context_length,omitempty"`
-	EmbedLen     int      `json:"embedding_length,omitempty"`
-	BaseName     string   `json:"base_name,omitempty"`
-
-	// required by spec
-	Architecture string `json:"architecture"`
-	OS           string `json:"os"`
-	RootFS       RootFS `json:"rootfs"`
-}
-
-type RootFS struct {
-	Type    string   `json:"type"`
-	DiffIDs []string `json:"diff_ids"`
-}
-
 func GetManifest(mp ModelPath) (*Manifest, string, error) {
 	fp, err := mp.GetManifestPath()
 	if err != nil {

server/routes.go

@@ -1223,7 +1223,7 @@ func (s *Server) ListHandler(c *gin.Context) {
 
 	models := []api.ListModelResponse{}
 	for n, m := range ms {
-		var cf ConfigV2
+		var cf model.ConfigV2
 
 		if m.Config.Digest != "" {
 			f, err := m.Config.Open()

server/routes_create_test.go

@@ -241,7 +241,7 @@ func TestCreateFromModelInheritsRendererParser(t *testing.T) {
 	}
 	defer cfgFile.Close()
 
-	var cfg ConfigV2
+	var cfg model.ConfigV2
 	if err := json.NewDecoder(cfgFile).Decode(&cfg); err != nil {
 		t.Fatalf("decode config: %v", err)
 	}

server/routes_delete_test.go

@@ -89,7 +89,7 @@ func TestDeleteDuplicateLayers(t *testing.T) {
 	n := model.ParseName("test")
 
 	var b bytes.Buffer
-	if err := json.NewEncoder(&b).Encode(&ConfigV2{}); err != nil {
+	if err := json.NewEncoder(&b).Encode(&model.ConfigV2{}); err != nil {
 		t.Fatal(err)
 	}
 

server/routes_test.go

@@ -126,10 +126,10 @@ func TestRoutes(t *testing.T) {
 			t.Fatalf("failed to create model: %v", err)
 		}
 
-		config := &ConfigV2{
+		config := &model.ConfigV2{
 			OS:           "linux",
 			Architecture: "amd64",
-			RootFS: RootFS{
+			RootFS: model.RootFS{
 				Type: "layers",
 			},
 		}
@@ -775,7 +775,7 @@ func TestFilterThinkTags(t *testing.T) {
 				{Role: "user", Content: "What is the answer?"},
 			},
 			model: &Model{
-				Config: ConfigV2{
+				Config: model.ConfigV2{
 					ModelFamily: "qwen3",
 				},
 			},
@@ -793,7 +793,7 @@ func TestFilterThinkTags(t *testing.T) {
 				{Role: "user", Content: "What is the answer?"},
 			},
 			model: &Model{
-				Config: ConfigV2{
+				Config: model.ConfigV2{
 					ModelFamily: "qwen3",
 				},
 			},
@@ -815,7 +815,7 @@ func TestFilterThinkTags(t *testing.T) {
 				{Role: "assistant", Content: "<think>thinking yet again</think>hjk"},
 			},
 			model: &Model{
-				Config: ConfigV2{
+				Config: model.ConfigV2{
 					ModelFamily: "qwen3",
 				},
 			},
@@ -833,7 +833,7 @@ func TestFilterThinkTags(t *testing.T) {
 				{Role: "user", Content: "What is the answer?"},
 			},
 			model: &Model{
-				Config: ConfigV2{
+				Config: model.ConfigV2{
 					ModelFamily: "llama3",
 				},
 			},
@@ -853,7 +853,7 @@ func TestFilterThinkTags(t *testing.T) {
 			model: &Model{
 				Name:      "registry.ollama.ai/library/deepseek-r1:latest",
 				ShortName: "deepseek-r1:7b",
-				Config:    ConfigV2{},
+				Config:    model.ConfigV2{},
 			},
 		},
 	}

types/model/config.go

+package model
+
+// ConfigV2 represents the configuration metadata for a model.
+type ConfigV2 struct {
+	ModelFormat   string   `json:"model_format"`
+	ModelFamily   string   `json:"model_family"`
+	ModelFamilies []string `json:"model_families"`
+	ModelType     string   `json:"model_type"` // shown as Parameter Size
+	FileType      string   `json:"file_type"`  // shown as Quantization Level
+	Renderer      string   `json:"renderer,omitempty"`
+	Parser        string   `json:"parser,omitempty"`
+
+	RemoteHost  string `json:"remote_host,omitempty"`
+	RemoteModel string `json:"remote_model,omitempty"`
+
+	// used for remotes
+	Capabilities []string `json:"capabilities,omitempty"`
+	ContextLen   int      `json:"context_length,omitempty"`
+	EmbedLen     int      `json:"embedding_length,omitempty"`
+	BaseName     string   `json:"base_name,omitempty"`
+
+	// required by spec
+	Architecture string `json:"architecture"`
+	OS           string `json:"os"`
+	RootFS       RootFS `json:"rootfs"`
+}
+
+// RootFS represents the root filesystem configuration for a model.
+type RootFS struct {
+	Type    string   `json:"type"`
+	DiffIDs []string `json:"diff_ids"`
+}