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fix(tui): only use alternate screen buffer on Terminal.app

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The alternate screen disables terminal scrollback. Only enable it
on Terminal.app where it's needed to prevent IME XPC crashes.
Other terminals (iTerm2, etc.) keep native scrolling.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
fanghanjun
2026-04-13 01:49:46 -07:00
parent 76523568de
commit e80a41def7
1 changed files with 10 additions and 7 deletions
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packages/cli/src/tui/app.ts
+10 -7
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@@ -186,13 +186,14 @@ export async function launchTui(
return (originalStderrWrite as Function)(chunk, ...args);
};
// Enter alternate screen buffer — isolates Ink rendering from the primary
// terminal view. This prevents IME XPC corruption on Terminal.app (the IME's
// Terminal.app only: enter alternate screen buffer to isolate Ink rendering
// from the primary terminal view. This prevents IME XPC corruption (the IME's
// NSRemoteView interacts with the primary screen; the alt screen is separate).
// Claude Code uses the same approach via <AlternateScreen> + DEC 1049.
const ENTER_ALT = "\x1b[?1049h";
const EXIT_ALT = "\x1b[?1049l";
process.stdout.write(ENTER_ALT);
// Other terminals keep their scrollback.
const useAltScreen = isAppleTerminal;
if (useAltScreen) {
process.stdout.write("\x1b[?1049h");
}
try {
await animateStartup(version, basename(projectRoot), session.activeBookId, modelInfo);
@@ -214,7 +215,9 @@ export async function launchTui(
);
await app.waitUntilExit();
} finally {
process.stdout.write(EXIT_ALT);
if (useAltScreen) {
process.stdout.write("\x1b[?1049l");
}
process.emitWarning = originalEmitWarning;
process.stderr.write = originalStderrWrite;
}