Reconcile Claude background task state

server/src/session/claude.rs

@@ -214,6 +214,7 @@ impl ClaudeDriver {
         session_dir: &Path,
         sink: EventSink,
         subagents: Arc<Subagents>,
+        initial_status: SessionStatus,
     ) -> Result<Self> {
         let state = Arc::new(Mutex::new(Translator::new(
             session_dir.to_path_buf(),
@@ -261,6 +262,9 @@ impl ClaudeDriver {
                 Self::start(meta, provider, transport, session_dir)?
             }
         };
+        if !started_here && matches!(initial_status, SessionStatus::Idle | SessionStatus::Waiting) {
+            state.lock().unwrap().mark_settled();
+        }
 
         // A process this driver has just started has been asked for nothing,
         // which is what idle means. Said here because nothing else will: the
@@ -320,14 +324,22 @@ impl ClaudeDriver {
             format!("{} {}", provider.name, transport.describe()),
         ));
 
-        Ok(Self {
+        let driver = Self {
             sink,
             queue,
             to_child,
             state,
             session_dir: session_dir.to_path_buf(),
             reading,
-        })
+        };
+        if !started_here {
+            // Claude 2.1.261 sends a full background-task snapshot after a
+            // repeated initialize. That repairs a completion edge missed by a
+            // backend that was down while the CLI kept running; older CLIs
+            // accept the request and simply send no snapshot.
+            driver.send_control(json!({"subtype": "initialize"}), None);
+        }
+        Ok(driver)
     }
 
     /// Starts a new CLI for this session, with its streams in the session
@@ -866,8 +878,12 @@ fn translate_line(
         return true;
     };
     let opens_a_model_call = starts_a_model_call(&message);
+    let parent_running = queue.lock().unwrap().running;
     let (events, new_session_id, before) = {
         let mut state = state.lock().unwrap();
+        if parent_running {
+            state.mark_running();
+        }
         let before = state.session_id.clone();
         let events = state.translate(&message);
         let after = state.session_id.clone();