Add the prism library in the theme

web/themes/custom/agarica/agarica.info.yml

@@ -27,6 +27,7 @@ regions:
 
 libraries:
   - agarica/global
+  - agarica/prism
 
 # This section is used by the contrib module, Component Libraries. It allows you
 # to reference .twig files in your sass/ directory by using the Twig namespace:

web/themes/custom/agarica/agarica.libraries.yml

@@ -17,3 +17,11 @@ global:
     https://unpkg.com/ionicons@4.5.0/dist/ionicons.js: {}
   dependencies:
     - octavia/global
+
+prism:
+  version: 1.15.0
+  css:
+    theme:
+      patternlibrary/agaric/css/prism.css: {}
+  js:
+    patternlibrary/agaric/js/prism.js: {}