chore: decorates model with description (#3057)

Author: dingfeli

crates/chat-cli/src/cli/chat/cli/model.rs

@@ -27,6 +27,9 @@ pub struct ModelInfo {
     /// Display name
     #[serde(skip_serializing_if = "Option::is_none")]
     pub model_name: Option<String>,
+    /// Description of the model
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub description: Option<String>,
     /// Actual model id to send in the API
     pub model_id: String,
     /// Size of the model's context window, in tokens
@@ -42,6 +45,7 @@ impl ModelInfo {
             .map_or(default_context_window(), |tokens| tokens as usize);
         Self {
             model_id: model.model_id().to_string(),
+            description: model.description.clone(),
             model_name: model.model_name().map(|s| s.to_string()),
             context_window_tokens,
         }
@@ -51,6 +55,7 @@ impl ModelInfo {
     pub fn from_id(model_id: String) -> Self {
         Self {
             model_id,
+            description: None,
             model_name: None,
             context_window_tokens: 200_000,
         }
@@ -59,6 +64,12 @@ impl ModelInfo {
     pub fn display_name(&self) -> &str {
         self.model_name.as_deref().unwrap_or(&self.model_id)
     }
+
+    pub fn description(&self) -> Option<&str> {
+        self.description
+            .as_deref()
+            .and_then(|d| if d.is_empty() { None } else { Some(d) })
+    }
 }
 
 /// Command-line arguments for model selection operations
@@ -95,10 +106,17 @@ pub async fn select_model(os: &Os, session: &mut ChatSession) -> Result<Option<C
         .iter()
         .map(|model| {
             let display_name = model.display_name();
+            let description = model.description();
             if Some(model.model_id.as_str()) == active_model_id {
-                format!("{} (active)", display_name)
+                if let Some(desc) = description {
+                    format!("{} (active) | {}", display_name, desc)
+                } else {
+                    format!("{} (active)", display_name)
+                }
+            } else if let Some(desc) = description {
+                format!("{} | {}", display_name, desc)
             } else {
-                display_name.to_owned()
+                display_name.to_string()
             }
         })
         .collect();
@@ -194,11 +212,13 @@ fn get_fallback_models() -> Vec<ModelInfo> {
         ModelInfo {
             model_name: Some("claude-sonnet-4".to_string()),
             model_id: "claude-sonnet-4".to_string(),
+            description: None,
             context_window_tokens: 200_000,
         },
         ModelInfo {
             model_name: Some("claude-3.7-sonnet".to_string()),
             model_id: "claude-3.7-sonnet".to_string(),
+            description: None,
             context_window_tokens: 200_000,
         },
     ]

crates/chat-cli/src/cli/chat/context.rs

@@ -443,6 +443,7 @@ mod tests {
         assert_eq!(
             calc_max_context_files_size(Some(&ModelInfo {
                 model_id: "CLAUDE_SONNET_4_20250514_V1_0".to_string(),
+                description: None,
                 model_name: Some("Claude".to_string()),
                 context_window_tokens: 200_000,
             })),
@@ -451,6 +452,7 @@ mod tests {
         assert_eq!(
             calc_max_context_files_size(Some(&ModelInfo {
                 model_id: "OPENAI_GPT_OSS_120B_1_0".to_string(),
+                description: None,
                 model_name: Some("GPT".to_string()),
                 context_window_tokens: 128_000,
             })),