add inline error messages

Author: jl54

init.lua

@@ -599,6 +599,8 @@ require('lazy').setup({
         },
       }
 
+      require('custom.diagnostics').setup()
+
       -- Ensure the servers and tools above are installed
       --  To check the current status of installed tools and/or manually install
       --  other tools, you can run

lua/custom/diagnostics.lua

@@ -0,0 +1,28 @@
+-- Custom LSP diagnostic configuration
+local M = {}
+
+M.setup = function()
+  vim.diagnostic.config {
+    virtual_text = {
+      prefix = '●', -- Change symbol if needed
+      spacing = 4,
+    },
+    signs = true,
+    underline = true,
+    update_in_insert = false,
+    severity_sort = true,
+    float = {
+      source = 'always',
+    },
+  }
+
+  -- Show diagnostics in a floating window when hovering
+  vim.o.updatetime = 250
+  vim.api.nvim_create_autocmd('CursorHold', {
+    callback = function()
+      vim.diagnostic.open_float(nil, { focusable = false })
+    end,
+  })
+end
+
+return M