diff --git a/.config/kak/autoload/lsp.kak b/.config/kak/autoload/lsp.kak
index da6c2e6e..9652a9ef 100644
--- a/.config/kak/autoload/lsp.kak
+++ b/.config/kak/autoload/lsp.kak
@@ -2,8 +2,21 @@
 eval %sh{kak-lsp}
 # eval %sh{kak-lsp-diags}
 
+declare-option str diags_dev "$HOME/dev/kak-lsp-diags"
+define-command -params 0..1 -docstring %{
+    enable lsp-diags. give -dev switch to run dev build.
+} diags %{
+    evaluate-commands %sh{
+        if [ "$1" = "-dev" ]; then
+            uv run --project "$kak_opt_diags_dev" kak-lsp-diags
+        else
+            kak-lsp-diags
+        fi
+    }
+}
+
 define-command -override -hidden lsp-do-send-async %{
-    # echo -debug ===BEGIN-LSP
+# echo -debug ===BEGIN-LSP
     # echo -quoting shell -debug %reg{a}
     # echo -debug ===END-LSP
     echo -quoting shell -to-file %opt{lsp_fifo} %reg{a}