From 5c25c389619892d309ae05fa24787049a627a6ee Mon Sep 17 00:00:00 2001
From: "opencode-agent[bot]"
 <219766164+opencode-agent[bot]@users.noreply.github.com>
Date: Tue, 25 Aug 2026 18:19:28 +0530
Subject: [PATCH] fix(tui): paste into active custom answers (#44849)

Co-authored-by: rekram1-node <rekram1-node@users.noreply.github.com>
---
 packages/tui/src/routes/session/form.tsx |  8 ++++++-
 packages/tui/test/cli/tui/form.test.tsx  | 29 ++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/packages/tui/src/routes/session/form.tsx b/packages/tui/src/routes/session/form.tsx
index f9c1a3027af..de93cfb4bd8 100644
--- a/packages/tui/src/routes/session/form.tsx
+++ b/packages/tui/src/routes/session/form.tsx
@@ -329,7 +329,13 @@ export function FormPrompt(props: { form: FormWithLocation }) {
 
   usePaste((event) => {
     if (keymap.mode.current() !== FORM_MODE) return
-    if (!pasteCustom(stripAnsiSequences(decodePasteBytes(event.bytes)).replace(/\r\n?/g, "\n"))) return
+    const value = stripAnsiSequences(decodePasteBytes(event.bytes)).replace(/\r\n?/g, "\n")
+    if (store.editing && renderer.currentFocusedEditor === textarea) {
+      textarea.insertText(value)
+      event.preventDefault()
+      return
+    }
+    if (!pasteCustom(value)) return
     event.preventDefault()
   })
 
diff --git a/packages/tui/test/cli/tui/form.test.tsx b/packages/tui/test/cli/tui/form.test.tsx
index 6f3efe9e615..4c762f9c9b5 100644
--- a/packages/tui/test/cli/tui/form.test.tsx
+++ b/packages/tui/test/cli/tui/form.test.tsx
@@ -310,6 +310,35 @@ test("pasting on a custom choice opens its editor without submitting", async ()
   }
 })
 
+test("pasting in an active custom editor inserts at the cursor", async () => {
+  await using tmp = await tmpdir()
+  const prompt = await mountForm(tmp.path, 80, [
+    {
+      key: "target",
+      type: "string",
+      options: [{ value: "staging", label: "Staging" }],
+      custom: true,
+    },
+  ])
+  try {
+    prompt.app.mockInput.pressArrow("down")
+    prompt.app.mockInput.pressEnter()
+    await prompt.app.waitFor(() => prompt.app.renderer.currentFocusedEditor !== null)
+    await prompt.app.mockInput.typeText("prodwest")
+    const editor = prompt.app.renderer.currentFocusedEditor
+    if (editor) editor.cursorOffset = 4
+
+    await prompt.app.mockInput.pasteBracketedText("uction ")
+    await prompt.app.waitFor(() => prompt.app.renderer.currentFocusedEditor?.plainText === "production west")
+    await prompt.app.mockInput.typeText("!")
+
+    expect(prompt.app.renderer.currentFocusedEditor?.plainText).toBe("production !west")
+    expect(prompt.replies).toEqual([])
+  } finally {
+    prompt.app.renderer.destroy()
+  }
+})
+
 test("clipboard shortcut opens a custom choice editor without submitting", async () => {
   await using tmp = await tmpdir()
   const prompt = await mountForm(