refactor: remove printMode in favor of Ink-only streaming

Print Mode (direct stdout.write) conflicts with Ink's terminal control
and provides no real benefit over Ink Mode's real-time Markdown rendering.
A proper non-interactive mode (like Claude Code's -p flag) would bypass
Ink entirely rather than mixing stdout.write within the React tree.

Removed: printMode prop, stdout.write branches, printMode state.

Author: Travelguest

src/cli/tui/app.tsx

@@ -30,7 +30,7 @@ export function App({
   commands: SlashCommand[];
   supportProjectWideAllow?: boolean;
 }) {
-  const { streaming, messages, streamingText, printMode, onSubmit, abort } = useAgentLoop();
+  const { streaming, messages, streamingText, onSubmit, abort } = useAgentLoop();
   const { approvalRequest, respondToApproval } = useApprovalManager();
   const { askUserQuestionRequest, respondWithAnswers } = useAskUserQuestionManager();
   const { latestTodos, todoSnapshots } = useMemo(() => buildTodoViewState(messages), [messages]);
@@ -47,7 +47,7 @@ export function App({
   useFlushToScrollback(messages, flushedRef, write);
 
   // Show streaming text in Ink mode (not print mode)
-  const showStreamingText = streaming && streamingText && !printMode;
+  const showStreamingText = streaming && !!streamingText;
   // Only show the shimmer indicator when there is no streaming text to display
   const showShimmer = streaming && !streamingText && !approvalRequest && !askUserQuestionRequest;
 

src/cli/tui/hooks/use-agent-loop.ts

@@ -12,7 +12,6 @@ type AgentLoopState = {
   streaming: boolean;
   messages: NonSystemMessage[];
   streamingText: string;
-  printMode: boolean;
   // eslint-disable-next-line no-unused-vars
   onSubmit: (submission: PromptSubmission) => Promise<void>;
   abort: () => void;
@@ -24,12 +23,10 @@ const AgentLoopContext = createContext<AgentLoopState | null>(null);
 export function AgentLoopProvider({
   agent,
   commands = [],
-  printMode = false,
   children,
 }: {
   agent: Agent;
   commands?: SlashCommand[];
-  printMode?: boolean;
   children: ReactNode;
 }) {
   const [streaming, setStreaming] = useState(false);
@@ -135,23 +132,11 @@ export function AgentLoopProvider({
             setStreamingText("");
             enqueueMessage(event.message);
           } else if (event.type === "progress" && event.subtype === "thinking") {
-            if (printMode) {
-              // Print Mode: write delta directly to stdout for instant output
-              if (event.delta) {
-                process.stdout.write(event.delta);
-              }
-            } else {
-              // Ink Mode: update React state for re-rendering
-              setStreamingText(event.text);
-            }
+            setStreamingText(event.text);
           }
           // tool progress events are handled by StreamingIndicator
         }
 
-        if (printMode) {
-          // Ensure a newline after print-mode streaming completes
-          process.stdout.write("\n");
-        }
       } catch (error) {
         if (isAbortError(error)) return;
         throw error;
@@ -162,7 +147,7 @@ export function AgentLoopProvider({
         setStreaming(false);
       }
     },
-    [agent, commands, enqueueMessage, flushPendingMessages, printMode],
+    [agent, commands, enqueueMessage, flushPendingMessages],
   );
 
   const value = useMemo(
@@ -171,12 +156,11 @@ export function AgentLoopProvider({
       streaming,
       messages,
       streamingText,
-      printMode,
       onSubmit,
       abort,
       tokenCount,
     }),
-    [abort, agent, messages, onSubmit, streaming, streamingText, printMode, tokenCount],
+    [abort, agent, messages, onSubmit, streaming, streamingText, tokenCount],
   );
 
   return createElement(AgentLoopContext.Provider, { value }, children);