feat: add Harper grammar checker LSP

modules/module/settings/cat-packages.nix

@@ -5,10 +5,10 @@
   ...
 }:
 let
-  -- Include packages from a category only if that category is enabled.
-  -- NOTE: The package list expression is still evaluated (packages in Nix are
-  -- lazy by default, so derivations are not built), so keep side-effecting
-  -- expressions out of these lists.
+  # Include packages from a category only if that category is enabled.
+  # NOTE: Package list expressions are lazily evaluated, and derivations are
+  # not built until needed, so keep side-effecting expressions out of these
+  # lists.
   maybe = cat: pkgsList:
     lib.optionals (config.cats.${cat} or false) pkgsList;
   rPackages = (pkgs.baseRPackages or [ ]) ++ config.settings.lang_packages.r;
@@ -25,7 +25,9 @@ in
   };
 
   config.catPkgs = {
-    always = maybe "always" (with pkgs; [ ]);
+    always = maybe "always" (with pkgs; [
+      ripgrep
+    ]);
 
     clickhouse = maybe "clickhouse" (with pkgs; [ clickhouse-lts ]);
 
@@ -51,7 +53,7 @@ in
       marksman
       texlab
       imagemagick
-      luaPackages.magick
+      harper
     ]);
 
     nix = maybe "nix" (with pkgs; [

modules/module/settings/lang-packages.nix

@@ -44,7 +44,10 @@
         data_table
         janitor
         styler
-        vscDebugger
+        # vscDebugger is not on CRAN/Bioconductor, so it is not available in
+        # pkgs.rpkgs.rPackages. Install it manually in your R library if you
+        # want to use the nvim-dap R adapter (see plugin/26_dap.lua).
+        # vscDebugger
         lintr
       ])
     );

modules/module/specs/plugins.nix

@@ -36,7 +36,6 @@ let
     "rnoweb"
     "regex"
     "sql"
-    "stata"
     "toml"
     "vim"
     "vimdoc"
@@ -190,9 +189,9 @@ in {
     ];
   };
 
-  -- Lazy-loaded plugins needed when the `r` cat is on. Kept separate from
-  -- `utils-lazy` so users with `r=true` and `utils=false` still get the
-  -- R debugger (via vscDebugger) and in-buffer image rendering for plots.
+  # Lazy-loaded plugins needed when the `r` cat is on. Kept separate from
+  # `utils-lazy` so users with `r=true` and `utils=false` still get the
+  # nvim-dap R adapter and in-buffer image rendering for plots.
   config.specs.r-lazy = lib.mkIf (config.cats.r or false) {
     lazy = true;
     data = with pkgs.vimPlugins; [

plugin/25_lsp.lua

@@ -17,6 +17,37 @@ now_if_args(function()
     marksman = {
       filetypes = { "markdown", "markdown_inline", "codecompanion" },
     },
+    harper_ls = {
+      cmd = { "harper-ls", "--stdio" },
+      filetypes = { "markdown", "quarto", "text", "tex", "typst" },
+      root_markers = { ".git", ".harper" },
+      settings = {
+        ["harper-ls"] = {
+          linters = {
+            SpellCheck = true,
+            SpelledNumbers = false,
+            AnA = true,
+            SentenceCapitalization = true,
+            UnclosedQuotes = true,
+            WrongApostrophe = false,
+            LongSentences = true,
+            RepeatedWords = true,
+            Spaces = true,
+            CorrectNumberSuffix = true,
+          },
+          codeActions = {
+            ForceStable = false,
+          },
+          markdown = {
+            IgnoreLinkTitle = false,
+          },
+          diagnosticSeverity = "hint",
+          isolateEnglish = false,
+          dialect = "American",
+          maxFileLength = 120000,
+        },
+      },
+    },
     nil_ls = {
       settings = {
         ["nil"] = {