.

nvim/init.lua

@@ -938,6 +938,19 @@ if vim.env.TMUX then
 	]])
 end
 
+local diag_format = function(d)
+	return string.format("(%s) %s", d.code, d.message)
+end
+
+vim.diagnostic.config({
+	virtual_text = {
+		format = diag_format,
+	},
+	float = {
+		format = diag_format,
+	}
+})
+
 ------------------------------------------------------------------------------------------------------------------------
 -- Commands
 ------------------------------------------------------------------------------------------------------------------------