diff --git a/.gitignore b/.gitignore
index 275236c..2d95cd9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -107,3 +107,6 @@ dist
 .vscode/**/*
 !.vscode/launch.json
 .DS_Store
+
+# Test files
+test-frontmatter.sudo.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7978bb8..493c692 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 ### Added
 
+- YAML frontmatter syntax highlighting for .sudo.md files - Keys, values, and quoted strings now have proper syntax highlighting matching standard .md files.
 - New [Autodux](examples/autodux.sudo) demonstrates how to use SudoLang to create a Redux state management system that automatically generates reducers, action creators, and selectors based on a brief description.
 - New [Whispers](examples/whispers.sudo) text adventure game demonstrates rich constraint-based programming and game `/save` and `/load` commands.
 
diff --git a/package-lock.json b/package-lock.json
index 36afb72..29e9bf2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "sudolang-llm-support",
-  "version": "2.0.0-rc.1",
+  "version": "2.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "sudolang-llm-support",
-      "version": "2.0.0-rc.1",
+      "version": "2.0.0",
       "hasInstallScript": true,
       "devDependencies": {
         "@types/node": "14.x",
diff --git a/sudolang-llm-support-2.0.0.vsix b/sudolang-llm-support-2.0.0.vsix
index cbb2caf..5c8bca1 100644
Binary files a/sudolang-llm-support-2.0.0.vsix and b/sudolang-llm-support-2.0.0.vsix differ
diff --git a/syntaxes/sudolang.tmLanguage.json b/syntaxes/sudolang.tmLanguage.json
index 02796f9..61d703d 100644
--- a/syntaxes/sudolang.tmLanguage.json
+++ b/syntaxes/sudolang.tmLanguage.json
@@ -3,6 +3,7 @@
   "name": "SudoLang",
   "fileTypes": ["sudo", "sudo.md", "mdc"],
   "patterns": [
+    { "include": "#frontmatter" },
     { "include": "#comments" },
     { "include": "#markdown-headers" },
     { "include": "#keywords" },
@@ -15,6 +16,21 @@
     { "include": "#expressions" }
   ],
   "repository": {
+    "frontmatter": {
+      "begin": "\\A(---)",
+      "beginCaptures": {
+        "1": { "name": "punctuation.definition.comment.yaml" }
+      },
+      "end": "^(---|\\.\\.\\.)",
+      "endCaptures": {
+        "1": { "name": "punctuation.definition.comment.yaml" }
+      },
+      "name": "meta.embedded.block.frontmatter",
+      "contentName": "source.yaml",
+      "patterns": [
+        { "include": "source.yaml" }
+      ]
+    },
     "markdown-headers": {
       "patterns": [
         {