diff --git a/crates/goose-cli/src/session/mod.rs b/crates/goose-cli/src/session/mod.rs
index 1635a65d919e..e79f954f6d08 100644
--- a/crates/goose-cli/src/session/mod.rs
+++ b/crates/goose-cli/src/session/mod.rs
@@ -1173,6 +1173,8 @@ impl Session {
                     }
                 }
                 _ = tokio::signal::ctrl_c() => {
+                    self.agent.cancel_all_subagent_executions().await;
+
                     drop(stream);
                     if let Err(e) = self.handle_interrupted_messages(true).await {
                         eprintln!("Error handling interruption: {}", e);
diff --git a/crates/goose/src/agents/agent.rs b/crates/goose/src/agents/agent.rs
index 1fbc70e8492a..0dde0a9d134c 100644
--- a/crates/goose/src/agents/agent.rs
+++ b/crates/goose/src/agents/agent.rs
@@ -219,6 +219,10 @@ impl Agent {
         *scheduler_service = Some(scheduler);
     }
 
+    pub async fn cancel_all_subagent_executions(&self) {
+        self.tasks_manager.cancel_all_executions().await;
+    }
+
     /// Get a reference count clone to the provider
     pub async fn provider(&self) -> Result<Arc<dyn Provider>, anyhow::Error> {
         match &*self.provider.lock().await {
diff --git a/crates/goose/src/agents/subagent_execution_tool/executor/mod.rs b/crates/goose/src/agents/subagent_execution_tool/executor/mod.rs
index 9a71ad4ad7f9..03e5c5a4c41b 100644
--- a/crates/goose/src/agents/subagent_execution_tool/executor/mod.rs
+++ b/crates/goose/src/agents/subagent_execution_tool/executor/mod.rs
@@ -16,10 +16,20 @@ use tokio::time::Instant;
 const EXECUTION_STATUS_COMPLETED: &str = "completed";
 const DEFAULT_MAX_WORKERS: usize = 10;
 
+/// Sets up cancellation handling for a task execution tracker
+async fn setup_cancellation_handling(
+    cancellation_token: tokio_util::sync::CancellationToken,
+    task_execution_tracker: Arc<TaskExecutionTracker>,
+) {
+    cancellation_token.cancelled().await;
+    task_execution_tracker.mark_cancelled();
+}
+
 pub async fn execute_single_task(
     task: &Task,
     notifier: mpsc::Sender<JsonRpcMessage>,
     task_config: TaskConfig,
+    cancellation_token: tokio_util::sync::CancellationToken,
 ) -> ExecutionResponse {
     let start_time = Instant::now();
     let task_execution_tracker = Arc::new(TaskExecutionTracker::new(
@@ -27,9 +37,22 @@ pub async fn execute_single_task(
         DisplayMode::SingleTaskOutput,
         notifier,
     ));
-    let result = process_task(task, task_execution_tracker.clone(), task_config).await;
 
-    // Complete the task in the tracker
+    let cancellation_future =
+        setup_cancellation_handling(cancellation_token, task_execution_tracker.clone());
+
+    let result = tokio::select! {
+        result = process_task(task, task_execution_tracker.clone(), task_config) => result,
+        _ = cancellation_future => {
+            crate::agents::subagent_execution_tool::task_types::TaskResult {
+                task_id: task.id.clone(),
+                status: crate::agents::subagent_execution_tool::task_types::TaskStatus::Failed,
+                data: None,
+                error: Some("Task execution cancelled".to_string()),
+            }
+        }
+    };
+
     task_execution_tracker
         .complete_task(&result.task_id, result.clone())
         .await;
@@ -48,12 +71,19 @@ pub async fn execute_tasks_in_parallel(
     tasks: Vec<Task>,
     notifier: mpsc::Sender<JsonRpcMessage>,
     task_config: TaskConfig,
+    cancellation_token: tokio_util::sync::CancellationToken,
 ) -> ExecutionResponse {
     let task_execution_tracker = Arc::new(TaskExecutionTracker::new(
         tasks.clone(),
         DisplayMode::MultipleTasksOutput,
         notifier,
     ));
+
+    tokio::spawn(setup_cancellation_handling(
+        cancellation_token,
+        task_execution_tracker.clone(),
+    ));
+
     let start_time = Instant::now();
     let task_count = tasks.len();
 
diff --git a/crates/goose/src/agents/subagent_execution_tool/lib/mod.rs b/crates/goose/src/agents/subagent_execution_tool/lib/mod.rs
index faa2bcd5a578..8144b754f135 100644
--- a/crates/goose/src/agents/subagent_execution_tool/lib/mod.rs
+++ b/crates/goose/src/agents/subagent_execution_tool/lib/mod.rs
@@ -16,6 +16,7 @@ pub async fn execute_tasks(
     notifier: mpsc::Sender<JsonRpcMessage>,
     task_config: TaskConfig,
     tasks_manager: &TasksManager,
+    cancellation_token: tokio_util::sync::CancellationToken,
 ) -> Result<Value, String> {
     let task_ids: Vec<String> = serde_json::from_value(
         input
@@ -31,7 +32,8 @@ pub async fn execute_tasks(
     match execution_mode {
         ExecutionMode::Sequential => {
             if task_count == 1 {
-                let response = execute_single_task(&tasks[0], notifier, task_config).await;
+                let response =
+                    execute_single_task(&tasks[0], notifier, task_config, cancellation_token).await;
                 handle_response(response)
             } else {
                 Err("Sequential execution mode requires exactly one task".to_string())
@@ -47,8 +49,13 @@ pub async fn execute_tasks(
                     }
                 ))
             } else {
-                let response: ExecutionResponse =
-                    execute_tasks_in_parallel(tasks, notifier.clone(), task_config).await;
+                let response: ExecutionResponse = execute_tasks_in_parallel(
+                    tasks,
+                    notifier.clone(),
+                    task_config,
+                    cancellation_token,
+                )
+                .await;
                 handle_response(response)
             }
         }
diff --git a/crates/goose/src/agents/subagent_execution_tool/subagent_execute_task_tool.rs b/crates/goose/src/agents/subagent_execution_tool/subagent_execute_task_tool.rs
index f3860253eb78..d7d0910f3212 100644
--- a/crates/goose/src/agents/subagent_execution_tool/subagent_execute_task_tool.rs
+++ b/crates/goose/src/agents/subagent_execution_tool/subagent_execute_task_tool.rs
@@ -11,6 +11,7 @@ use crate::agents::{
 use mcp_core::protocol::JsonRpcMessage;
 use tokio::sync::mpsc;
 use tokio_stream;
+use tokio_util::sync::CancellationToken;
 
 pub const SUBAGENT_EXECUTE_TASK_TOOL_NAME: &str = "subagent__execute_task";
 pub fn create_subagent_execute_task_tool() -> Tool {
@@ -66,29 +67,41 @@ pub async fn run_tasks(
     tasks_manager: &TasksManager,
 ) -> ToolCallResult {
     let (notification_tx, notification_rx) = mpsc::channel::<JsonRpcMessage>(100);
+    let cancellation_token = CancellationToken::new();
+
+    // Register the execution with the tasks manager
+    tasks_manager
+        .register_execution(cancellation_token.clone())
+        .await;
 
     let tasks_manager_clone = tasks_manager.clone();
+    let cancellation_token_clone = cancellation_token.clone();
     let result_future = async move {
-        let execute_data_clone = execute_data.clone();
-        let execution_mode = execute_data_clone
+        let execution_mode = execute_data
             .get("execution_mode")
             .and_then(|v| serde_json::from_value::<ExecutionMode>(v.clone()).ok())
             .unwrap_or_default();
 
-        match execute_tasks(
-            execute_data,
-            execution_mode,
-            notification_tx,
-            task_config,
-            &tasks_manager_clone,
-        )
-        .await
-        {
-            Ok(result) => {
-                let output = serde_json::to_string(&result).unwrap();
-                Ok(vec![Content::text(output)])
+        tokio::select! {
+            result = execute_tasks(
+                execute_data,
+                execution_mode,
+                notification_tx,
+                task_config,
+                &tasks_manager_clone,
+                cancellation_token_clone.clone(),
+            ) => {
+                match result {
+                    Ok(result) => {
+                        let output = serde_json::to_string(&result).unwrap();
+                        Ok(vec![Content::text(output)])
+                    }
+                    Err(e) => Err(ToolError::ExecutionError(e.to_string())),
+                }
+            }
+            _ = cancellation_token_clone.cancelled() => {
+                Err(ToolError::ExecutionError("Task execution cancelled".to_string()))
             }
-            Err(e) => Err(ToolError::ExecutionError(e.to_string())),
         }
     };
 
diff --git a/crates/goose/src/agents/subagent_execution_tool/task_execution_tracker.rs b/crates/goose/src/agents/subagent_execution_tool/task_execution_tracker.rs
index c720459e01ae..70194a2385c0 100644
--- a/crates/goose/src/agents/subagent_execution_tool/task_execution_tracker.rs
+++ b/crates/goose/src/agents/subagent_execution_tool/task_execution_tracker.rs
@@ -1,6 +1,7 @@
 use mcp_core::protocol::{JsonRpcMessage, JsonRpcNotification};
 use serde_json::json;
 use std::collections::HashMap;
+use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use tokio::sync::{mpsc, RwLock};
 use tokio::time::{sleep, Duration, Instant};
@@ -61,6 +62,7 @@ pub struct TaskExecutionTracker {
     last_refresh: Arc<RwLock<Instant>>,
     notifier: mpsc::Sender<JsonRpcMessage>,
     display_mode: DisplayMode,
+    is_cancelled: Arc<AtomicBool>,
 }
 
 impl TaskExecutionTracker {
@@ -92,6 +94,7 @@ impl TaskExecutionTracker {
             last_refresh: Arc::new(RwLock::new(Instant::now())),
             notifier,
             display_mode,
+            is_cancelled: Arc::new(AtomicBool::new(false)),
         }
     }
 
@@ -162,7 +165,9 @@ impl TaskExecutionTracker {
                             })),
                         }))
                 {
-                    tracing::warn!("Failed to send live output notification: {}", e);
+                    if !self.should_suppress_error(&e) {
+                        tracing::warn!("Failed to send live output notification: {}", e);
+                    }
                 }
             }
             DisplayMode::MultipleTasksOutput => {
@@ -235,7 +240,9 @@ impl TaskExecutionTracker {
                 })),
             }))
         {
-            tracing::warn!("Failed to send tasks update notification: {}", e);
+            if !self.should_suppress_error(&e) {
+                tracing::warn!("Failed to send tasks update notification: {}", e);
+            }
         }
     }
 
@@ -296,10 +303,36 @@ impl TaskExecutionTracker {
                 })),
             }))
         {
-            tracing::warn!("Failed to send tasks complete notification: {}", e);
+            if !self.should_suppress_error(&e) {
+                tracing::warn!("Failed to send tasks complete notification: {}", e);
+            }
         }
 
         // Brief delay to ensure completion notification is processed
-        sleep(Duration::from_millis(COMPLETION_NOTIFICATION_DELAY_MS)).await;
+        if !self.is_cancelled() {
+            sleep(Duration::from_millis(COMPLETION_NOTIFICATION_DELAY_MS)).await;
+        }
+    }
+
+    fn is_channel_closed(
+        &self,
+        error: &tokio::sync::mpsc::error::TrySendError<JsonRpcMessage>,
+    ) -> bool {
+        matches!(error, tokio::sync::mpsc::error::TrySendError::Closed(_))
+    }
+
+    fn should_suppress_error(
+        &self,
+        error: &tokio::sync::mpsc::error::TrySendError<JsonRpcMessage>,
+    ) -> bool {
+        self.is_cancelled() && self.is_channel_closed(error)
+    }
+
+    pub fn is_cancelled(&self) -> bool {
+        self.is_cancelled.load(Ordering::SeqCst)
+    }
+
+    pub fn mark_cancelled(&self) {
+        self.is_cancelled.store(true, Ordering::SeqCst);
     }
 }
diff --git a/crates/goose/src/agents/subagent_execution_tool/tasks_manager.rs b/crates/goose/src/agents/subagent_execution_tool/tasks_manager.rs
index 4864994b7a0d..f43884cc9cd3 100644
--- a/crates/goose/src/agents/subagent_execution_tool/tasks_manager.rs
+++ b/crates/goose/src/agents/subagent_execution_tool/tasks_manager.rs
@@ -2,12 +2,14 @@ use anyhow::Result;
 use std::collections::HashMap;
 use std::sync::Arc;
 use tokio::sync::RwLock;
+use tokio_util::sync::CancellationToken;
 
 use crate::agents::subagent_execution_tool::task_types::Task;
 
 #[derive(Debug, Clone)]
 pub struct TasksManager {
     tasks: Arc<RwLock<HashMap<String, Task>>>,
+    active_tokens: Arc<RwLock<Vec<CancellationToken>>>,
 }
 
 impl Default for TasksManager {
@@ -20,6 +22,7 @@ impl TasksManager {
     pub fn new() -> Self {
         Self {
             tasks: Arc::new(RwLock::new(HashMap::new())),
+            active_tokens: Arc::new(RwLock::new(Vec::new())),
         }
     }
 
@@ -50,6 +53,22 @@ impl TasksManager {
         }
         Ok(tasks)
     }
+
+    pub async fn register_execution(&self, cancellation_token: CancellationToken) {
+        let mut tokens = self.active_tokens.write().await;
+        tokens.retain(|token| !token.is_cancelled());
+        tokens.push(cancellation_token);
+    }
+
+    pub async fn cancel_all_executions(&self) {
+        let mut tokens = self.active_tokens.write().await;
+
+        for token in tokens.iter() {
+            token.cancel();
+        }
+
+        tokens.clear();
+    }
 }
 
 #[cfg(test)]
@@ -100,4 +119,43 @@ mod tests {
         assert_eq!(task1.unwrap().id, "task1");
         assert_eq!(task2.unwrap().id, "task2");
     }
+
+    #[tokio::test]
+    async fn test_cancellation_token_tracking() {
+        let manager = TasksManager::new();
+
+        let token1 = CancellationToken::new();
+        let token2 = CancellationToken::new();
+
+        manager.register_execution(token1.clone()).await;
+        manager.register_execution(token2.clone()).await;
+
+        assert!(!token1.is_cancelled());
+        assert!(!token2.is_cancelled());
+
+        manager.cancel_all_executions().await;
+
+        assert!(token1.is_cancelled());
+        assert!(token2.is_cancelled());
+    }
+
+    #[tokio::test]
+    async fn test_automatic_cleanup_on_register() {
+        let manager = TasksManager::new();
+
+        let token1 = CancellationToken::new();
+        let token2 = CancellationToken::new();
+
+        manager.register_execution(token1.clone()).await;
+        manager.register_execution(token2.clone()).await;
+
+        token1.cancel();
+
+        let token3 = CancellationToken::new();
+        manager.register_execution(token3.clone()).await;
+
+        let tokens = manager.active_tokens.read().await;
+        assert_eq!(tokens.len(), 2);
+        assert!(!tokens.iter().any(|t| t.is_cancelled()));
+    }
 }
diff --git a/crates/goose/src/agents/subagent_execution_tool/workers.rs b/crates/goose/src/agents/subagent_execution_tool/workers.rs
index 4ae0ab250737..f3597d871811 100644
--- a/crates/goose/src/agents/subagent_execution_tool/workers.rs
+++ b/crates/goose/src/agents/subagent_execution_tool/workers.rs
@@ -31,7 +31,9 @@ async fn worker_loop(state: Arc<SharedState>, _worker_id: usize, task_config: Ta
         .await;
 
         if let Err(e) = state.result_sender.send(result).await {
-            tracing::error!("Worker failed to send result: {}", e);
+            if !state.task_execution_tracker.is_cancelled() {
+                tracing::error!("Worker failed to send result: {}", e);
+            }
             break;
         }
     }