From 1dcec87c89b3585d74924263de654fcc872e39af Mon Sep 17 00:00:00 2001
From: Pradyuman Vig <me@pmn.co>
Date: Tue, 8 Sep 2026 00:05:29 -0400
Subject: [PATCH] fix: close side buffers when splitting current buffer

---
 lua/zen/init.lua      |  4 ++--
 tests/test_splits.lua | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/lua/zen/init.lua b/lua/zen/init.lua
index 2789ba3..62054b0 100644
--- a/lua/zen/init.lua
+++ b/lua/zen/init.lua
@@ -559,7 +559,7 @@ local function setup(options)
 		desc = "Recreate the side buffers if they are closed.",
 	})
 
-	vim.api.nvim_create_autocmd({ "BufWinEnter", "FileType" }, {
+	vim.api.nvim_create_autocmd({ "BufWinEnter", "FileType", "WinNew" }, {
 		pattern = "*",
 		callback = function(args)
 			if is_popup_window(vim.api.nvim_get_current_win()) then
@@ -567,7 +567,7 @@ local function setup(options)
 			end
 			local filetype = vim.bo[args.buf].filetype
 			local is_integration = is_buff_integration(args.buf)
-			if args.event == "BufWinEnter" then
+			if args.event == "BufWinEnter" or args.event == "WinNew" then
 				if filetype ~= "" and not is_integration and vim.tbl_count(get_vsplits()) >= 2 then
 					close_side_buffer("left")
 					close_side_buffer("right")
diff --git a/tests/test_splits.lua b/tests/test_splits.lua
index 35e680f..1dc5e57 100644
--- a/tests/test_splits.lua
+++ b/tests/test_splits.lua
@@ -25,6 +25,19 @@ T["vsplit"]["opening closes zen side buffers"] = function()
 	})
 end
 
+T["vsplit"]["splitting the current buffer closes zen side buffers"] = function()
+	child.cmd("edit test.lua")
+	child.cmd("vsplit")
+
+	Helpers.expect.layout(child, {
+		type = "row",
+		children = {
+			{ type = "leaf", filetype = "lua", buftype = "", width = 120, height = 50 },
+			{ type = "leaf", filetype = "lua", buftype = "", width = 119, height = 50 },
+		},
+	})
+end
+
 T["vsplit"]["closing reopens zen side buffers"] = function()
 	child.cmd("edit test.lua")
 	child.cmd("vsplit test2.lua")