From 28f74f8591350881ff06ef3758fa29f04eacea0a Mon Sep 17 00:00:00 2001
From: James Long <longster@gmail.com>
Date: Thu, 12 Nov 2026 10:50:11 -0600
Subject: [PATCH] fix(tui): copy the paste inside the prompt selection (#63275)

---
 packages/tui/src/component/prompt/index.tsx | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/packages/tui/src/component/prompt/index.tsx b/packages/tui/src/component/prompt/index.tsx
index 075f037dcc5..7072853b537 100644
--- a/packages/tui/src/component/prompt/index.tsx
+++ b/packages/tui/src/component/prompt/index.tsx
@@ -1822,7 +1822,18 @@ export function Prompt(props: PromptProps) {
               ref={(r: TextareaRenderable) => {
                 input = r
                 Object.assign(r, {
-                  getClipboardText: (text: string) => expandPastedTextPlaceholders(text, store.prompt.pasted),
+                  getClipboardText: (text: string) => {
+                    const range = r.getSelection()
+                    // A selection spanning other renderables is not indexed relative to this textarea.
+                    if (!range || text !== r.getSelectedText()) {
+                      return expandPastedTextPlaceholders(text, store.prompt.pasted)
+                    }
+                    const parts = store.prompt.pasted.flatMap(({ source, text }) => {
+                      if (source.start < range.start || source.end > range.end) return []
+                      return [{ start: source.start - range.start, end: source.end - range.start, text }]
+                    })
+                    return expandTrackedPastedText(text, parts, renderer.widthMethod)
+                  },
                 })
                 setInputTarget(r)
                 if (promptPartTypeId === 0) {