From 7d6e766027b610051fd315e3de8d3ea19f854f6e Mon Sep 17 00:00:00 2001
From: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Date: Thu, 9 Apr 2026 16:23:16 +0200
Subject: [PATCH] fix(cli): fallback to plain prompt on VTE terminals with
 broken emoji width (#8385)

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Signed-off-by: Douwe Osinga <douwe@squareup.com>
Co-authored-by: Douwe Osinga <douwe@squareup.com>
---
 crates/goose-cli/src/session/input.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/crates/goose-cli/src/session/input.rs b/crates/goose-cli/src/session/input.rs
index 7265cc4d..af9db363 100644
--- a/crates/goose-cli/src/session/input.rs
+++ b/crates/goose-cli/src/session/input.rs
@@ -400,9 +400,23 @@ fn parse_plan_command(input: String) -> Option<InputResult> {
 }
 
 fn get_input_prompt_string() -> String {
+    if is_vte_with_broken_emoji_width() {
+        return "> ".to_string();
+    }
     "🪿 ".to_string()
 }
 
+/// VTE < 0.70 renders 🪿 as 1 cell while unicode-width counts 2, causing cursor offset.
+fn is_vte_with_broken_emoji_width() -> bool {
+    let Ok(vte_version) = std::env::var("VTE_VERSION") else {
+        return false;
+    };
+    let Ok(version) = vte_version.parse::<u32>() else {
+        return true;
+    };
+    version < 7000
+}
+
 fn print_help() {
     let newline_key = get_newline_key().to_ascii_uppercase();
     let modes = GooseMode::VARIANTS.join(", ");