diff --git a/javascripts/discourse/api-initializers/theme-initializer.gjs b/javascripts/discourse/api-initializers/theme-initializer.gjs
index 45f6474..078f1e6 100644
--- a/javascripts/discourse/api-initializers/theme-initializer.gjs
+++ b/javascripts/discourse/api-initializers/theme-initializer.gjs
@@ -627,6 +627,106 @@ function julia(hljs) {
   return DEFAULT;
 }
 
+/*
+Language: Julia IR
+Description: Julia Static Single Assignment (SSA) form Intermediate Representation
+Author: Matt Bauman
+Website: https://docs.julialang.org/en/v1/devdocs/ssair/
+Category: scientific
+Extends: julia.js
+*/
+
+function juliaIR(hljs) {
+  // Get the base Julia language definition
+  const jl = hljs.getLanguage("julia");
+
+  if (!jl) {
+    throw new Error(
+      "Julia language definition not found. Julia IR extends Julia."
+    );
+  }
+
+  // Clone the Julia definition to avoid modifying the original
+  const jlir = {
+    ...jl,
+    name: "julia-ir",
+  };
+
+  // Add IR-specific keywords to existing Julia keywords
+  const IR_KEYWORDS = [
+    "goto",
+    "not",
+    "invoke",
+    "call",
+    "enter",
+    "leave",
+    "unreachable",
+    "φᶜ",
+    "φ",
+    "π",
+    "ϒ",
+  ];
+
+  // Extend keywords
+  if (jlir.keywords) {
+    jlir.keywords = {
+      ...jlir.keywords,
+      keyword: [...(juliaIR.keywords.keyword || []), ...IR_KEYWORDS],
+    };
+  }
+
+  // IR-specific patterns that need to be added to the contains array
+  const IR_PATTERNS = [
+    // SSA values (%1, %2, etc.) - highest priority
+    {
+      scope: "variable",
+      match: /%\d+/,
+      relevance: 10,
+    },
+
+    // Basic block labels (1 ─, 2 ┄, etc.) and box drawing
+    {
+      scope: "section",
+      match: /^\s*\d*[ ─│╻╷└┃┌┄]+/,
+      relevance: 8,
+    },
+
+    // Control flow labels (#1, #2, etc.)
+    {
+      scope: "symbol",
+      match: /#\d+/,
+      relevance: 5,
+    },
+
+    // Warned type annotations
+    {
+      scope: "type.unstable",
+      match: /::(Any|Box)\b/,
+      relevance: 8,
+    },
+
+    // CodeInfo wrapper
+    {
+      scope: "meta",
+      begin: /\bCodeInfo\s*\(/,
+      end: /$/,
+      contains: ["self"],
+      relevance: 10,
+    },
+  ];
+
+  // Prepend IR patterns to the contains array (higher priority than base Julia patterns)
+  if (jlir.contains) {
+    jlir.contains = [...IR_PATTERNS, ...jlir.contains];
+  } else {
+    jlir.contains = IR_PATTERNS;
+  }
+
+  jlir.case_insensitive = false;
+
+  return jlir;
+}
+
 /*
     Language: Julia REPL
     Description: Julia REPL sessions
@@ -703,6 +803,30 @@ function juliaRepl(hljs) {
           ],
         },
       },
+      {
+        className: "meta.prompt",
+        begin: /^julia>(?=\s+@?code_(typed|lowered|warntype)\b)/,
+        relevance: 15,
+        starts: {
+          end: /^(?=julia>)/,
+          returnBegin: true,
+          contains: [
+            {
+              // The Julia command line itself
+              begin: /\s+@?code_(typed|lowered|warntype)/,
+              end: /^(?![ ]{6})/,
+              subLanguage: "julia",
+              endsWithParent: true,
+            },
+            {
+              // The IR that follows
+              begin: /^./,
+              subLanguage: "julia-ir",
+              endsWithParent: true,
+            },
+          ],
+        },
+      },
       {
         className: "meta.prompt",
         begin: /^julia>/,
@@ -777,6 +901,7 @@ function juliaRepl(hljs) {
 
 export default apiInitializer((api) => {
   api.registerHighlightJSLanguage("julia", julia);
+  api.registerHighlightJSLanguage("julia-ir", juliaIR);
   api.registerHighlightJSLanguage("julia-repl", juliaRepl);
   // Register meta-language that auto-detects between julia and julia-repl
   api.registerHighlightJSLanguage("julia-auto", function (hljs) {