From 0771e3a8bee1b099468f3c95e19bd78699f62b12 Mon Sep 17 00:00:00 2001
From: Rasheed <99349713+gitRasheed@users.noreply.github.com>
Date: Thu, 12 Feb 2026 17:27:53 +0000
Subject: [PATCH] fix(app): preserve undo history for plain-text paste (#13351)

---
 packages/app/src/components/prompt-input/attachments.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/app/src/components/prompt-input/attachments.ts b/packages/app/src/components/prompt-input/attachments.ts
index 232b7557d..9ea2e62a6 100644
--- a/packages/app/src/components/prompt-input/attachments.ts
+++ b/packages/app/src/components/prompt-input/attachments.ts
@@ -89,6 +89,9 @@ export function createPromptAttachments(input: PromptAttachmentsInput) {
     }
 
     if (!plainText) return
+    const inserted = typeof document.execCommand === "function" && document.execCommand("insertText", false, plainText)
+    if (inserted) return
+
     input.addPart({ type: "text", content: plainText, start: 0, end: 0 })
   }