Restore terminal state on startup and resume failures

packages/cli/index.ts

@@ -32,7 +32,9 @@ process.on('uncaughtException', (error) => {
   } else {
     writeToStderr(String(error) + '\n');
   }
-  process.exit(1);
+  void runExitCleanup().finally(() => {
+    process.exit(1);
+  });
 });
 
 main().catch(async (error) => {

packages/cli/src/gemini.tsx

@@ -641,16 +641,27 @@ export async function main() {
 
     const wasRaw = process.stdin.isRaw;
     if (config.isInteractive() && !wasRaw && process.stdin.isTTY) {
+      const restoreRawMode = () => {
+        if (
+          process.stdin.isTTY &&
+          process.stdin.isRaw !== wasRaw &&
+          typeof process.stdin.setRawMode === 'function'
+        ) {
+          process.stdin.setRawMode(wasRaw);
+        }
+      };
+
       // Set this as early as possible to avoid spurious characters from
       // input showing up in the output.
       process.stdin.setRawMode(true);
+      registerCleanup(restoreRawMode);
 
-      // This cleanup isn't strictly needed but may help in certain situations.
+      // Best-effort terminal restoration if terminated by signals.
-      process.on('SIGTERM', () => {
+      process.on('SIGTERM', restoreRawMode);
-        process.stdin.setRawMode(wasRaw);
+      process.on('SIGINT', restoreRawMode);
-      });
+      registerCleanup(() => {
-      process.on('SIGINT', () => {
+        process.off('SIGTERM', restoreRawMode);
-        process.stdin.setRawMode(wasRaw);
+        process.off('SIGINT', restoreRawMode);
       });
     }