diff --git a/Gemfile b/Gemfile
index 9d68fb8..3f5a96a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,8 +8,12 @@ gem 'asciidoctor-html5s'
 gem 'asciidoctor-rouge'
 gem 'asciidoctor-tabs', github: 'asciidoctor/asciidoctor-tabs'
 gem 'asciidoctor-interdoc-reftext'
+gem 'concurrent-ruby'
+gem 'open-uri-cached'
 gem 'rouge'
 gem 'rubocop'
+gem 'slim'
+gem 'tilt'
 
 group :development do
   gem 'ruby-lsp', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index fabc2cd..6352d82 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,6 +37,7 @@ GEM
     citeproc-ruby (1.1.14)
       citeproc (~> 1.0, >= 1.0.9)
       csl (~> 1.6)
+    concurrent-ruby (1.2.2)
     csl (1.6.0)
       namae (~> 1.0)
       rexml
@@ -46,6 +47,7 @@ GEM
     language_server-protocol (3.17.0.3)
     latex-decode (0.4.0)
     namae (1.1.1)
+    open-uri-cached (1.0.0)
     parallel (1.22.1)
     parser (3.2.1.0)
       ast (~> 2.4.1)
@@ -71,10 +73,15 @@ GEM
       sorbet-runtime
       syntax_tree (>= 6, < 7)
     ruby-progressbar (1.13.0)
+    slim (5.1.0)
+      temple (~> 0.10.0)
+      tilt (>= 2.0.6, < 2.2)
     sorbet-runtime (0.5.10693)
     syntax_tree (6.0.1)
       prettier_print (>= 1.2.0)
+    temple (0.10.0)
     thread_safe (0.3.6)
+    tilt (2.1.0)
     unicode-display_width (2.4.2)
 
 PLATFORMS
@@ -88,9 +95,13 @@ DEPENDENCIES
   asciidoctor-interdoc-reftext
   asciidoctor-rouge
   asciidoctor-tabs!
+  concurrent-ruby
+  open-uri-cached
   rouge
   rubocop
   ruby-lsp
+  slim
+  tilt
 
 BUNDLED WITH
    2.3.7
diff --git a/gemset.nix b/gemset.nix
index 30f35e9..4f014dd 100644
--- a/gemset.nix
+++ b/gemset.nix
@@ -30,7 +30,6 @@
     platforms = [];
     source = {
       path = "gems";
-      target = "ruby";
       type = "path";
     };
     targets = [];
@@ -141,6 +140,18 @@
     targets = [];
     version = "1.1.14";
   };
+  concurrent-ruby = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0krcwb6mn0iklajwngwsg850nk8k9b35dhmc2qkbdqvmifdi2y9q";
+      target = "ruby";
+      type = "gem";
+    };
+    targets = [];
+    version = "1.2.2";
+  };
   csl = {
     dependencies = ["namae" "rexml"];
     groups = ["default"];
@@ -215,6 +226,18 @@
     targets = [];
     version = "1.1.1";
   };
+  open-uri-cached = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "03v0if3jlvbclnd6jgjk94fbhf0h2fq1wxr0mbx7018sxzm0biwr";
+      target = "ruby";
+      type = "gem";
+    };
+    targets = [];
+    version = "1.0.0";
+  };
   parallel = {
     groups = ["default"];
     platforms = [];
@@ -351,6 +374,19 @@
     targets = [];
     version = "1.13.0";
   };
+  slim = {
+    dependencies = ["temple" "tilt"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1rp437r8hr9kdgabb7c96yw4z2wyrajl4cxiij038y10f8i6hbn4";
+      target = "ruby";
+      type = "gem";
+    };
+    targets = [];
+    version = "5.1.0";
+  };
   sorbet-runtime = {
     groups = ["default" "development"];
     platforms = [];
@@ -376,6 +412,18 @@
     targets = [];
     version = "6.0.1";
   };
+  temple = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "07k5wr2ypsmsbyc9d1plhdki4xr7vvggld8r1i49iljkrpx5nbqc";
+      target = "ruby";
+      type = "gem";
+    };
+    targets = [];
+    version = "0.10.0";
+  };
   thread_safe = {
     groups = ["default"];
     platforms = [];
@@ -388,6 +436,18 @@
     targets = [];
     version = "0.3.6";
   };
+  tilt = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1qmhi6d9przjzhsyk9g5pq2j75c656msh6xzprqd2mxgphf23jxs";
+      target = "ruby";
+      type = "gem";
+    };
+    targets = [];
+    version = "2.1.0";
+  };
   unicode-display_width = {
     groups = ["default"];
     platforms = [];