From 12ae5b846987dadd15a71c14e92f48832d2ccc6a Mon Sep 17 00:00:00 2001
From: cyberksh <125770189+cyberksh@users.noreply.github.com>
Date: Mon, 13 Apr 2026 17:08:30 +0530
Subject: [PATCH] feat(tmux): focus tmux pane after sending text

When using tmux mux mode with create = "split" or "window", sending
text to the tool pane now switches focus to it via `tmux select-pane`.

Adds M:focus() to the tmux session backend and calls it from
State.attach() for external sessions that implement it.
---
 lua/sidekick/cli/session/tmux.lua | 8 ++++++++
 lua/sidekick/cli/state.lua        | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/lua/sidekick/cli/session/tmux.lua b/lua/sidekick/cli/session/tmux.lua
index 942ed7d1..b1c02a4e 100644
--- a/lua/sidekick/cli/session/tmux.lua
+++ b/lua/sidekick/cli/session/tmux.lua
@@ -186,6 +186,14 @@ function M:submit()
   Util.exec({ "tmux", "send-keys", "-t", self.tmux_pane_id, "Enter" })
 end
 
+---Focus the tmux pane (select it as the active pane)
+function M:focus()
+  local pane_id = self:pane_id()
+  if pane_id then
+    Util.exec({ "tmux", "select-pane", "-t", pane_id })
+  end
+end
+
 function M:dump()
   local pane_id = self:pane_id()
   if not pane_id then
diff --git a/lua/sidekick/cli/state.lua b/lua/sidekick/cli/state.lua
index 01f1f3e3..a11aa02a 100644
--- a/lua/sidekick/cli/state.lua
+++ b/lua/sidekick/cli/state.lua
@@ -194,6 +194,8 @@ function M.attach(state, opts)
         terminal:focus()
       end
     end
+  elseif state.session and state.session.focus and opts.focus ~= false then
+    state.session:focus()
   elseif attached then
     Util.info("Attached to `" .. state.tool.name .. "`")
   end