--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/highlight/languages/diff.js	Mon Jan 19 18:59:10 2026 -0800
@@ -0,0 +1,72 @@
+/*! `diff` grammar compiled for Highlight.js 11.11.1 */
+  (function(){
+    var hljsGrammar = (function () {
+  'use strict';
+
+  /*
+  Language: Diff
+  Description: Unified and context diff
+  Author: Vasily Polovnyov <[email protected]>
+  Website: https://www.gnu.org/software/diffutils/
+  Category: common
+  */
+
+  /** @type LanguageFn */
+  function diff(hljs) {
+    const regex = hljs.regex;
+    return {
+      name: 'Diff',
+      aliases: [ 'patch' ],
+      contains: [
+        {
+          className: 'meta',
+          relevance: 10,
+          match: regex.either(
+            /^@@ +-\d+,\d+ +\+\d+,\d+ +@@/,
+            /^\*\*\* +\d+,\d+ +\*\*\*\*$/,
+            /^--- +\d+,\d+ +----$/
+          )
+        },
+        {
+          className: 'comment',
+          variants: [
+            {
+              begin: regex.either(
+                /Index: /,
+                /^index/,
+                /={3,}/,
+                /^-{3}/,
+                /^\*{3} /,
+                /^\+{3}/,
+                /^diff --git/
+              ),
+              end: /$/
+            },
+            { match: /^\*{15}$/ }
+          ]
+        },
+        {
+          className: 'addition',
+          begin: /^\+/,
+          end: /$/
+        },
+        {
+          className: 'deletion',
+          begin: /^-/,
+          end: /$/
+        },
+        {
+          className: 'addition',
+          begin: /^!/,
+          end: /$/
+        }
+      ]
+    };
+  }
+
+  return diff;
+
+})();
+
+    hljs.registerLanguage('diff', hljsGrammar);
+  })();
\ No newline at end of file