From 15539d3dec40bcc40e6f4bb0eaa4f073ad26b74f Mon Sep 17 00:00:00 2001
From: Can Celik <ogulcancelik@gmail.com>
Date: Sat, 15 Aug 2026 15:09:53 +0300
Subject: feat: make headless terminal size configurable (#2829)

refs #2828
---
 src/app/state.rs | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'src/app/state.rs')

diff --git a/src/app/state.rs b/src/app/state.rs
index ea550472..e03d90a9 100644
--- a/src/app/state.rs
+++ b/src/app/state.rs
@@ -1428,6 +1428,8 @@ pub struct AppState {
     // Config
     pub prefix_code: KeyCode,
     pub prefix_mods: KeyModifiers,
+    /// Virtual terminal size (columns, rows) used when no client is attached.
+    pub(crate) headless_size: (u16, u16),
     pub default_sidebar_width: u16,
     pub sidebar_width: u16,
     pub sidebar_min_width: u16,
@@ -1618,7 +1620,7 @@ impl AppState {
         if let Some(info) = self.view.pane_infos.first() {
             (info.rect.height, info.rect.width)
         } else {
-            (24, 80)
+            (self.headless_size.1, self.headless_size.0)
         }
     }
 
@@ -1800,6 +1802,10 @@ impl AppState {
             outer_terminal_focus: None,
             prefix_code: KeyCode::Char('b'),
             prefix_mods: KeyModifiers::CONTROL,
+            headless_size: (
+                crate::config::DEFAULT_HEADLESS_COLS,
+                crate::config::DEFAULT_HEADLESS_ROWS,
+            ),
             default_sidebar_width: 26,
             sidebar_width: 26,
             sidebar_min_width: 18,
@@ -2242,6 +2248,14 @@ mod tests {
     use super::*;
     use crossterm::event::KeyEvent;
 
+    #[test]
+    fn pane_size_estimate_uses_headless_size_before_first_view() {
+        let mut state = AppState::test_new();
+        state.headless_size = (132, 41);
+
+        assert_eq!(state.estimate_pane_size(), (41, 132));
+    }
+
     #[test]
     fn agent_terminal_keeps_final_child_cursor_exposed() {
         let mut state = AppState::test_new();
-- 
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