Minimally disable subagents when not in autonomous model (#5149)

crates/goose/src/agents/prompt_manager.rs

@@ -113,6 +113,12 @@ impl PromptManager {
             Value::String(suggest_disable_extensions_prompt.to_string()),
         );
 
+        // Add the mode to the context for conditional rendering
+        let config = Config::global();
+        let goose_mode = config.get_param("GOOSE_MODE").unwrap_or("auto".to_string());
+        context.insert("goose_mode", Value::String(goose_mode.clone()));
+        context.insert("is_autonomous", Value::Bool(goose_mode == "auto"));
+
         // First check the global store, and only if it's not available, fall back to the provided model_name
         let model_to_use: Option<String> =
             get_current_model().or_else(|| model_name.map(|s| s.to_string()));
@@ -139,8 +145,6 @@ impl PromptManager {
         };
 
         let mut system_prompt_extras = self.system_prompt_extras.clone();
-        let config = Config::global();
-        let goose_mode = config.get_param("GOOSE_MODE").unwrap_or("auto".to_string());
         if goose_mode == "chat" {
             system_prompt_extras.push(
                 "Right now you are in the chat only mode, no access to any tool use and system."

crates/goose/src/agents/reply_parts.rs

@@ -40,9 +40,20 @@ impl Agent {
         // Get tools from extension manager
         let mut tools = self.list_tools_for_router().await;
 
+        let config = crate::config::Config::global();
+        let is_autonomous = config.get_param("GOOSE_MODE").unwrap_or("auto".to_string()) == "auto";
+
         // If router is disabled and no tools were returned, fall back to regular tools
         if !router_enabled && tools.is_empty() {
+            // Get all tools but filter out subagent tools if not in autonomous mode
             tools = self.list_tools(None).await;
+            if !is_autonomous {
+                // Filter out subagent-related tools
+                tools.retain(|tool| {
+                    tool.name != crate::agents::subagent_execution_tool::subagent_execute_task_tool::SUBAGENT_EXECUTE_TASK_TOOL_NAME
+                        && tool.name != crate::agents::recipe_tools::dynamic_task_tools::DYNAMIC_TASK_TOOL_NAME_PREFIX
+                });
+            }
         }
 
         // Add frontend tools

crates/goose/src/agents/todo_extension.rs

@@ -62,8 +62,8 @@ impl TodoClient {
                 - [ ] Implement feature X
                   - [ ] Update API
                   - [ ] Write tests
-                  - [ ] Run tests (subagent in parallel)
+                  - [ ] Run tests
-                  - [ ] Run lint (subagent in parallel)
+                  - [ ] Run lint
                 - [ ] Blocked: waiting on credentials
             "#}.to_string()),
         };

crates/goose/src/prompts/system.md

@@ -48,7 +48,7 @@ No extensions are defined. You should let the user know that they should add ext
 {% endif %}
 
 {{tool_selection_strategy}}
-
+{% if is_autonomous %}
 # sub agents
 
 Execute self contained tasks where step-by-step visibility is not important through subagents.
@@ -60,6 +60,7 @@ Execute self contained tasks where step-by-step visibility is not important thro
 - Provide all needed context — subagents cannot see your context
 - Use extension filters to limit resource access
 - Use return_last_only when only a summary or simple answer is required — inform subagent of this choice.
+{% endif %}
 
 # Response Guidelines