diff --git a/editors/vscode/icon.png b/editors/vscode/icon.png
new file mode 100644
index 0000000..7f1067e
Binary files /dev/null and b/editors/vscode/icon.png differ
diff --git a/editors/vscode/package-lock.json b/editors/vscode/package-lock.json
index e2170d4..35c5a96 100644
--- a/editors/vscode/package-lock.json
+++ b/editors/vscode/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "logic-md-vscode",
-	"version": "0.1.0",
+	"version": "0.1.1",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "logic-md-vscode",
-			"version": "0.1.0",
+			"version": "0.1.1",
 			"license": "MIT",
 			"devDependencies": {
 				"@types/node": "^22.0.0",
diff --git a/editors/vscode/package.json b/editors/vscode/package.json
index a514452..f753fa9 100644
--- a/editors/vscode/package.json
+++ b/editors/vscode/package.json
@@ -2,9 +2,10 @@
 	"name": "logic-md-vscode",
 	"displayName": "LOGIC.md",
 	"description": "Syntax highlighting and validation for LOGIC.md reasoning specifications",
-	"version": "0.1.1",
+	"version": "0.1.2",
 	"publisher": "singlesourceai",
 	"license": "MIT",
+	"icon": "icon.png",
 	"repository": {
 		"type": "git",
 		"url": "https://github.com/SingularityAI-Dev/logic-md"
diff --git a/editors/vscode/src/extension.ts b/editors/vscode/src/extension.ts
index 0c1ba41..4c6b0e9 100644
--- a/editors/vscode/src/extension.ts
+++ b/editors/vscode/src/extension.ts
@@ -83,9 +83,16 @@ function validateDocument(doc: vscode.TextDocument): void {
 	const text = doc.getText();
 	const lines = text.split("\n");
 
-	// Check for frontmatter delimiters
-	const frontmatterStart = text.search(/^---/m);
-	const frontmatterEnd = text.search(/^---/m, frontmatterStart + 1);
+	// Check for frontmatter delimiters.
+	// NOTE: String.prototype.search() ignores any second argument, so we use a /g regex
+	// with repeated .exec() calls to find the opening and closing --- delimiters.
+	// Frontmatter must be the very first line of the document; stray --- blocks later
+	// in the file (e.g. markdown horizontal rules) must not be treated as frontmatter.
+	const fmRegex = /^---\s*$/gm;
+	const firstMatch = fmRegex.exec(text);
+	const frontmatterStart = firstMatch && firstMatch.index === 0 ? 0 : -1;
+	const secondMatch = frontmatterStart === 0 ? fmRegex.exec(text) : null;
+	const frontmatterEnd = secondMatch ? secondMatch.index : -1;
 
 	if (frontmatterStart === -1) {
 		const range = new vscode.Range(0, 0, 0, 0);