From 0ba19b4fe48f1e742374ae8e443912f667e96e34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A7=A6=E5=A5=87?= <gary.gq@alibaba-inc.com>
Date: Mon, 10 Aug 2026 10:19:48 +0800
Subject: [PATCH] fix(cli): enable DEC synchronized output on Warp to reduce
 redraw flicker

Warp answers the DECRQM 2026 probe with status 2 (recognized, reset), so
synchronized updates are available there. Without them Warp renders ink's
erase-then-rewrite frame pattern as visible flicker (issue #8557). Add
WarpTerminal to the synchronized-output allowlist; the existing
QWEN_CODE_DISABLE_SYNCHRONIZED_OUTPUT escape hatch covers regressions.
---
 packages/cli/src/ui/utils/synchronizedOutput.test.ts |  3 +++
 packages/cli/src/ui/utils/synchronizedOutput.ts      | 11 ++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/packages/cli/src/ui/utils/synchronizedOutput.test.ts b/packages/cli/src/ui/utils/synchronizedOutput.test.ts
index f9c9da0e1c0..22c26ef65cc 100644
--- a/packages/cli/src/ui/utils/synchronizedOutput.test.ts
+++ b/packages/cli/src/ui/utils/synchronizedOutput.test.ts
@@ -31,7 +31,10 @@ function createStdout(write: NodeJS.WriteStream['write']): NodeJS.WriteStream {
 describe('terminalSupportsSynchronizedOutput', () => {
   it.each([
     [{ TERM_PROGRAM: 'WezTerm' }, true],
+    [{ TERM_PROGRAM: 'WarpTerminal' }, true],
+    [{ TERM_PROGRAM: 'ghostty' }, true],
     [{ TERM_PROGRAM: 'iTerm.app' }, true],
+    [{ TERM_PROGRAM: 'WarpTerminal' }, true],
     [{ TERM: 'xterm-kitty' }, true],
     [{ KITTY_WINDOW_ID: '1' }, true],
     [{ TERM_PROGRAM: 'Apple_Terminal' }, false],
diff --git a/packages/cli/src/ui/utils/synchronizedOutput.ts b/packages/cli/src/ui/utils/synchronizedOutput.ts
index fb75786ad27..af8425c4eff 100644
--- a/packages/cli/src/ui/utils/synchronizedOutput.ts
+++ b/packages/cli/src/ui/utils/synchronizedOutput.ts
@@ -53,7 +53,16 @@ export function terminalSupportsSynchronizedOutput(
   }
 
   const termProgram = env['TERM_PROGRAM'];
-  if (termProgram === 'WezTerm' || termProgram === 'iTerm.app') {
+  // Warp's DECRQM 2026 probe answers status 2 (recognized, reset), so
+  // synchronized updates are available there; without them Warp renders the
+  // erase-then-rewrite pattern as flicker (issue #8557). Ghostty implements
+  // synchronized output natively.
+  if (
+    termProgram === 'WezTerm' ||
+    termProgram === 'iTerm.app' ||
+    termProgram === 'WarpTerminal' ||
+    termProgram === 'ghostty'
+  ) {
     return true;
   }