started adding optional schema

Author: ekang7

crates/chat-cli/src/cli/agent/mod.rs

@@ -131,10 +131,11 @@ pub enum AgentConfigError {
 pub struct Agent {
     #[serde(
         rename = "$schema",
-        default = "default_schema",
-        skip_serializing_if = "String::is_empty"
+        default,
+        skip_serializing_if = "Option::is_none",
+        deserialize_with = "deserialize_optional_string"
     )]
-    pub schema: String,
+    pub schema: Option,
     /// Name of the agent
     pub name: String,
     /// This field is not model facing and is mostly here for users to discern between agents
@@ -181,9 +182,18 @@ pub struct Agent {
     pub path: Option<PathBuf>,
 }
 
+fn deserialize_optional_string<'de, D>(deserializer: D) -> Result, D::Error>
+where
+    D: serde::Deserializer<'de>,
+{
+    let opt = Option::::deserialize(deserializer)?;
+    Ok(opt.filter(|s| !s.is_empty()))
+}
+
 impl Default for Agent {
     fn default() -> Self {
         Self {
+            schema: None,
             name: DEFAULT_AGENT_NAME.to_string(),
             description: Some("Default agent".to_string()),
             prompt: Default::default(),