fix: fetch descriptions from graph agent configs as well when listing agents

assets/agents/librarian/graph.yaml

@@ -8,8 +8,6 @@ description: |
   sisyphus alongside explore when unfamiliar libraries/APIs/frameworks are
   involved.
 
-  Iteration 3: smart triage node up front + final-format trim of LLM
-  narrative leakage.
 version: "1.0"
 
 global_tools:

src/config/agent.rs

@@ -1020,15 +1020,30 @@ pub fn list_agents_with_descriptions() -> Vec<(String, String)> {
     list_agents()
         .into_iter()
         .map(|name| {
-            let description = AgentConfig::load(&paths::agent_config_file(&name))
-                .ok()
-                .map(|c| c.description)
-                .unwrap_or_default();
+            let description = load_agent_description(&name);
             (name, description)
         })
         .collect()
 }
 
+#[derive(Deserialize)]
+struct AgentMetadataStub {
+    #[serde(default)]
+    description: String,
+}
+
+fn load_agent_description(name: &str) -> String {
+    if let Ok(config) = AgentConfig::load(&paths::agent_config_file(name)) {
+        return config.description;
+    }
+    if let Ok(contents) = read_to_string(paths::agent_graph_file(name))
+        && let Ok(meta) = serde_yaml::from_str::<AgentMetadataStub>(&contents)
+    {
+        return meta.description;
+    }
+    String::new()
+}
+
 pub fn complete_agent_variables(agent_name: &str) -> Vec<(String, Option<String>)> {
     let config_path = paths::agent_config_file(agent_name);
     if !config_path.exists() {
@@ -1218,4 +1233,38 @@ variables:
         assert_eq!(config.max_agent_depth, default_max_agent_depth());
         assert_eq!(config.escalation_timeout, default_escalation_timeout());
     }
+
+    #[test]
+    fn agent_metadata_stub_extracts_description_from_graph_yaml() {
+        let yaml = r#"
+name: librarian
+description: External-reference research agent.
+version: "1.0"
+start: triage
+nodes: {}
+"#;
+        let meta: AgentMetadataStub = serde_yaml::from_str(yaml).unwrap();
+        assert_eq!(meta.description, "External-reference research agent.");
+    }
+
+    #[test]
+    fn agent_metadata_stub_extracts_multiline_description() {
+        let yaml = r#"
+name: coder
+description: |
+  Implementation agent. Plans, implements, and runs build + tests in a
+  bounded fix-loop until verified.
+version: "1.0"
+"#;
+        let meta: AgentMetadataStub = serde_yaml::from_str(yaml).unwrap();
+        assert!(meta.description.starts_with("Implementation agent."));
+        assert!(meta.description.contains("bounded fix-loop"));
+    }
+
+    #[test]
+    fn agent_metadata_stub_defaults_when_description_missing() {
+        let yaml = "name: nameless\nversion: \"1.0\"\n";
+        let meta: AgentMetadataStub = serde_yaml::from_str(yaml).unwrap();
+        assert_eq!(meta.description, "");
+    }
 }

src/config/request_context.rs

@@ -10,8 +10,8 @@ use super::{
     AGENTS_DIR_NAME, Agent, AgentVariables, AppConfig, AppState, AssetCategory, CREATE_TITLE_ROLE,
     Input, InstallFilter, LEFT_PROMPT, LastMessage, MESSAGES_FILE_NAME, RIGHT_PROMPT, Role,
     RoleLike, SESSIONS_DIR_NAME, SUMMARIZATION_PROMPT, SUMMARY_CONTEXT_PROMPT, StateFlags,
-    TEMP_ROLE_NAME, TEMP_SESSION_NAME, WorkingMode, ensure_parent_exists, list_agents, memory,
-    paths,
+    TEMP_ROLE_NAME, TEMP_SESSION_NAME, WorkingMode, ensure_parent_exists, list_agents,
+    list_agents_with_descriptions, memory, paths,
 };
 use super::{MessageContentToolCalls, prompts};
 use crate::client::{Model, ModelType, list_models};
@@ -2338,21 +2338,18 @@ impl RequestContext {
             "rags" => print_asset_names("RAGs", &paths::list_rags()),
             "macros" => print_asset_names("macros", &paths::list_macros()),
             "agents" => {
-                let names = list_agents();
-                if names.is_empty() {
+                let entries = list_agents_with_descriptions();
+                if entries.is_empty() {
                     println!("No agents found.");
                     return Ok(());
                 }
 
                 println!("Agents:");
-                for name in names {
-                    let description = AgentConfig::load(&paths::agent_config_file(&name))
-                        .ok()
-                        .map(|c| c.description)
-                        .filter(|d| !d.is_empty());
-                    match description {
-                        Some(description) => println!("  • {name} — {description}"),
-                        None => println!("  • {name}"),
+                for (name, description) in entries {
+                    if description.is_empty() {
+                        println!("  • {name}");
+                    } else {
+                        println!("  • {name} — {description}");
                     }
                 }