diff --git a/dot_config/nvim/ftplugin/tex.lua b/dot_config/nvim/ftplugin/tex.lua
index 08fe8fe..b679a2b 100644
--- a/dot_config/nvim/ftplugin/tex.lua
+++ b/dot_config/nvim/ftplugin/tex.lua
@@ -9,3 +9,16 @@ vim.opt_local.spelllang = { "en_gb", "de_de", "fr" }
 vim.opt_local.wrap = true
 vim.opt_local.linebreak = true
 vim.opt_local.textwidth = 0 -- don't hard-wrap LaTeX
+
+-- Normalize display-math delimiters: $$ … $$ → \[ … \] on every save.
+-- Uses a unique augroup per buffer to avoid double-registration on :edit.
+vim.api.nvim_create_autocmd("BufWritePre", {
+  buffer = 0,
+  group = vim.api.nvim_create_augroup("user_tex_normalize_math_" .. vim.api.nvim_get_current_buf(), { clear = true }),
+  callback = function()
+    local view = vim.fn.winsaveview()
+    vim.cmd([[silent! keeppatterns %s/\v\$\$(\_.{-})\$\$/\\[\1\\]/g]])
+    vim.fn.winrestview(view)
+  end,
+})
+
diff --git a/dot_config/nvim/lua/lsp/texlab.lua b/dot_config/nvim/lua/lsp/texlab.lua
index d0f6062..2a07b15 100644
--- a/dot_config/nvim/lua/lsp/texlab.lua
+++ b/dot_config/nvim/lua/lsp/texlab.lua
@@ -15,6 +15,10 @@ vim.lsp.config("texlab", {
       formatterLineLength = 80,
       bibtexFormatter = "texlab",
       latexFormatter = "latexindent",
+      latexindent = {
+        ["local"] = "localSettings.yaml",
+        modifyLineBreaks = false,
+      },
     },
   },
 })
diff --git a/dot_config/nvim/lua/plugins/ai.lua b/dot_config/nvim/lua/plugins/ai.lua
index 6b4cb99..432108c 100644
--- a/dot_config/nvim/lua/plugins/ai.lua
+++ b/dot_config/nvim/lua/plugins/ai.lua
@@ -8,7 +8,7 @@ return {
     },
     opts = {
       backend = "ollama",
-      model = "qwen2.5-coder:latest",
+      model = "qwen2.5-coder:1.5b-base",
       url = vim.env.OLLAMA_HOST or "http://localhost:11434",
       tokens_to_clear = { "<|endoftext|>" },
       fim = {
diff --git a/dot_config/nvim/lua/plugins/editing.lua b/dot_config/nvim/lua/plugins/editing.lua
index 4cfc69f..b9f2476 100644
--- a/dot_config/nvim/lua/plugins/editing.lua
+++ b/dot_config/nvim/lua/plugins/editing.lua
@@ -60,6 +60,20 @@ return {
         tex             = { "latexindent" },
         ["jinja.html"]  = { "djlint" },
       },
+      formatters = {
+        latexindent = {
+          -- Pass -l <localSettings.yaml> if found anywhere up the directory tree,
+          -- so project-local verbatimEnvironments guards are respected.
+          prepend_args = function(_, ctx)
+            local found = vim.fs.find("localSettings.yaml", {
+              upward = true,
+              path = vim.fs.dirname(ctx.filename),
+              type = "file",
+            })[1]
+            return found and { "-l", found } or {}
+          end,
+        },
+      },
       format_on_save = {
         timeout_ms = 2000,
         lsp_fallback = true,