api,types: add skill types and configuration

Add skill-related types to the API and configuration:

- api/types.go: Skill reference types for API requests/responses
- types/model/config.go: Skill configuration in model config
- envconfig/config.go: Environment configuration for skills

api/types.go

@@ -17,6 +17,9 @@ import (
 	"github.com/ollama/ollama/types/model"
 )
 
+// SkillRef is an alias for model.SkillRef representing a skill reference.
+type SkillRef = model.SkillRef
+
 // StatusError is an error with an HTTP status code and message.
 type StatusError struct {
 	StatusCode   int
@@ -557,6 +560,12 @@ type CreateRequest struct {
 	// Requires is the minimum version of Ollama required by the model.
 	Requires string `json:"requires,omitempty"`
 
+	// Skills is a list of skill references for the agent (local paths or registry refs)
+	Skills []SkillRef `json:"skills,omitempty"`
+
+	// AgentType defines the type of agent (e.g., "conversational", "task-based")
+	AgentType string `json:"agent_type,omitempty"`
+
 	// Info is a map of additional information for the model
 	Info map[string]any `json:"info,omitempty"`
 
@@ -608,6 +617,8 @@ type ShowResponse struct {
 	Capabilities  []model.Capability `json:"capabilities,omitempty"`
 	ModifiedAt    time.Time          `json:"modified_at,omitempty"`
 	Requires      string             `json:"requires,omitempty"`
+	Skills        []SkillRef         `json:"skills,omitempty"`
+	AgentType     string             `json:"agent_type,omitempty"`
 }
 
 // CopyRequest is the request passed to [Client.Copy].

envconfig/config.go

@@ -148,6 +148,16 @@ func Remotes() []string {
 	return r
 }
 
+// Skills returns the list of skill directories. Skills directories can be configured via the OLLAMA_SKILLS environment variable.
+// Returns empty slice if not configured.
+func Skills() []string {
+	raw := strings.TrimSpace(Var("OLLAMA_SKILLS"))
+	if raw == "" {
+		return []string{}
+	}
+	return strings.Split(raw, ",")
+}
+
 func BoolWithDefault(k string) func(defaultValue bool) bool {
 	return func(defaultValue bool) bool {
 		if s := Var(k); s != "" {
@@ -317,6 +327,9 @@ func AsMap() map[string]EnvVar {
 		ret["OLLAMA_VULKAN"] = EnvVar{"OLLAMA_VULKAN", EnableVulkan(), "Enable experimental Vulkan support"}
 	}
 
+	// Skills configuration would go here when added
+	ret["OLLAMA_SKILLS"] = EnvVar{"OLLAMA_SKILLS", Skills(), "Comma-separated list of skill directories"}
+
 	return ret
 }
 

types/model/config.go

@@ -1,5 +1,13 @@
 package model
 
+// SkillRef represents a reference to a skill, either by local path or by registry digest.
+type SkillRef struct {
+	// Name is the local path (for development) or registry name (e.g., "skill/calculator:1.0.0")
+	Name string `json:"name,omitempty"`
+	// Digest is the content-addressable digest of the skill blob (e.g., "sha256:abc123...")
+	Digest string `json:"digest,omitempty"`
+}
+
 // ConfigV2 represents the configuration metadata for a model.
 type ConfigV2 struct {
 	ModelFormat   string   `json:"model_format"`
@@ -20,6 +28,10 @@ type ConfigV2 struct {
 	EmbedLen     int      `json:"embedding_length,omitempty"`
 	BaseName     string   `json:"base_name,omitempty"`
 
+	// agent-specific fields
+	Skills    []SkillRef `json:"skills,omitempty"`
+	AgentType string     `json:"agent_type,omitempty"`
+
 	// required by spec
 	Architecture string `json:"architecture"`
 	OS           string `json:"os"`