Make ctrl-c work like in claude code (#6900)

Co-authored-by: Douwe Osinga <douwe@squareup.com>

crates/goose-cli/src/session/mod.rs

@@ -166,11 +166,19 @@ pub struct CliSession {
     output_format: String,
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum HintStatus {
+    Default,
+    Interrupted,
+    MaybeExit,
+}
+
 // Cache structure for completion data
-struct CompletionCache {
-    prompts: HashMap<String, Vec<String>>,
-    prompt_info: HashMap<String, output::PromptInfo>,
-    last_updated: Instant,
+pub struct CompletionCache {
+    pub prompts: HashMap<String, Vec<String>>,
+    pub prompt_info: HashMap<String, output::PromptInfo>,
+    pub last_updated: Instant,
+    pub hint_status: HintStatus,
 }
 
 impl CompletionCache {
@@ -179,6 +187,7 @@ impl CompletionCache {
             prompts: HashMap::new(),
             prompt_info: HashMap::new(),
             last_updated: Instant::now(),
+            hint_status: HintStatus::Default,
         }
     }
 }
@@ -1095,7 +1104,11 @@ impl CliSession {
     }
 
     async fn handle_interrupted_messages(&mut self, interrupt: bool) -> Result<()> {
-        // First, get any tool requests from the last message if it exists
+        if interrupt {
+            let mut cache = self.completion_cache.write().unwrap();
+            cache.hint_status = HintStatus::Interrupted;
+        }
+
         let tool_requests = self
             .messages
             .last()
@@ -1116,6 +1129,7 @@ impl CliSession {
         if !tool_requests.is_empty() {
             // Interrupted during a tool request
             // Create tool responses for all interrupted tool requests
+            // TODO(Douwe): if we need this, it should happen in agent reply
             let mut response_message = Message::user();
             let last_tool_name = tool_requests
                 .last()
@@ -1142,7 +1156,6 @@ impl CliSession {
                     }),
                 ));
             }
-            // TODO(Douwe): update also db
             self.push_message(response_message);
             let prompt = format!(
                 "The existing call to {} was interrupted. How would you like to proceed?",