Make image optional on ContainerAgent

agentschema-emitter/lib/model/container.tsp

@@ -66,7 +66,7 @@ model ContainerAgent extends AgentDefinition {
 
   @doc("Container image path (e.g., '<acr-endpoint>/<container-image-name>')")
   @sample(#{ image: "myregistry.azurecr.io/my-agent" })
-  image: string;
+  image?: string;
 
   @doc("Path to a Dockerfile for deployment. Can be relative to the working directory or an absolute path.")
   @sample(#{ dockerfilePath: "./Dockerfile" })

runtime/csharp/AgentSchema/ContainerAgent.cs

@@ -40,7 +40,7 @@ public ContainerAgent()
     /// <summary>
     /// Container image path (e.g., '<acr-endpoint>/<container-image-name>')
     /// </summary>
-    public string Image { get; set; } = string.Empty;
+    public string? Image { get; set; }
 
     /// <summary>
     /// Path to a Dockerfile for deployment. Can be relative to the working directory or an absolute path.

runtime/python/agentschema/src/agentschema/_AgentDefinition.py

@@ -457,7 +457,7 @@ class ContainerAgent(AgentDefinition):
         Type of agent, e.g., 'hosted'
     protocols : list[ProtocolVersionRecord]
         Protocol used by the containerized agent
-    image : str
+    image : Optional[str]
         Container image path (e.g., '<acr-endpoint>/<container-image-name>')
     dockerfilePath : Optional[str]
         Path to a Dockerfile for deployment. Can be relative to the working directory or an absolute path.
@@ -471,7 +471,7 @@ class ContainerAgent(AgentDefinition):
 
     kind: str = field(default="hosted")
     protocols: list[ProtocolVersionRecord] = field(default_factory=list)
-    image: str = field(default="")
+    image: Optional[str] = None
     dockerfilePath: Optional[str] = None
     resources: ContainerResources = field(default_factory=ContainerResources)
     environmentVariables: list[EnvironmentVariable] = field(default_factory=list)

runtime/rust/agentschema/src/agent_definition.rs

@@ -373,7 +373,7 @@ pub struct ContainerAgent {
     /// Protocol used by the containerized agent
     pub protocols: serde_json::Value,
     /// Container image path (e.g., '<acr-endpoint>/<container-image-name>')
-    pub image: String,
+    pub image: Option<String>,
     /// Path to a Dockerfile for deployment. Can be relative to the working directory or an absolute path.
     pub dockerfile_path: Option<String>,
     /// Resource allocation for the container
@@ -415,8 +415,7 @@ impl ContainerAgent {
             image: value
                 .get("image")
                 .and_then(|v| v.as_str())
-                .unwrap_or_default()
-                .to_string(),
+                .map(|s| s.to_string()),
             dockerfile_path: value
                 .get("dockerfilePath")
                 .and_then(|v| v.as_str())
@@ -445,11 +444,8 @@ impl ContainerAgent {
         if !self.protocols.is_null() {
             result.insert("protocols".to_string(), self.protocols.clone());
         }
-        if !self.image.is_empty() {
-            result.insert(
-                "image".to_string(),
-                serde_json::Value::String(self.image.clone()),
-            );
+        if let Some(ref val) = self.image {
+            result.insert("image".to_string(), serde_json::Value::String(val.clone()));
         }
         if let Some(ref val) = self.dockerfile_path {
             result.insert(

runtime/rust/agentschema/tests/container_agent_test.rs

@@ -35,7 +35,11 @@ fn test_container_agent_load_json() {
     );
     let instance = result.unwrap();
     assert_eq!(instance.kind, "hosted");
-    assert_eq!(instance.image, "myregistry.azurecr.io/my-agent");
+    assert!(instance.image.is_some(), "Expected image to be Some");
+    assert_eq!(
+        instance.image.as_ref().unwrap(),
+        &"myregistry.azurecr.io/my-agent"
+    );
     assert!(
         instance.dockerfile_path.is_some(),
         "Expected dockerfile_path to be Some"
@@ -68,7 +72,7 @@ environmentVariables:
     );
     let instance = result.unwrap();
     assert_eq!(instance.kind, "hosted");
-    assert_eq!(instance.image, "myregistry.azurecr.io/my-agent");
+    assert!(instance.image.is_some(), "Expected image to be Some");
     assert!(
         instance.dockerfile_path.is_some(),
         "Expected dockerfile_path to be Some"

runtime/typescript/agentschema/src/agent-definition.ts

@@ -722,7 +722,7 @@ export class ContainerAgent extends AgentDefinition {
   /**
    * Container image path (e.g., '<acr-endpoint>/<container-image-name>')
    */
-  image: string = "";
+  image?: string | undefined;
 
   /**
    * Path to a Dockerfile for deployment. Can be relative to the working directory or an absolute path.
@@ -749,7 +749,9 @@ export class ContainerAgent extends AgentDefinition {
 
     this.protocols = init?.protocols ?? [];
 
-    this.image = init?.image ?? "";
+    if (init?.image !== undefined) {
+      this.image = init.image;
+    }
 
     if (init?.dockerfilePath !== undefined) {
       this.dockerfilePath = init.dockerfilePath;

schemas/v1.0/ContainerAgent.yaml

@@ -41,7 +41,6 @@ properties:
 required:
   - kind
   - protocols
-  - image
   - resources
 allOf:
   - $ref: AgentDefinition.yaml