fix: normalize quoted user-invocable frontmatter (#87)

* fix: normalize quoted user-invokable frontmatter

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

* fix: preserve quoted non-boolean frontmatter values

Only normalize quoted booleans for the user-invocable frontmatter flag so other quoted fields like argument-hint and description continue to round-trip as plain strings.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

---------

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

scripts/lib/utils.js

@@ -101,13 +101,19 @@ export function parseFrontmatter(content) {
       if (colonIndex > 0) {
         const key = trimmed.slice(0, colonIndex).trim();
         const value = trimmed.slice(colonIndex + 1).trim();
+        const isQuoted = /^(".*"|'.*')$/.test(value);
+        const unquotedValue = isQuoted ? value.slice(1, -1) : value;
+        const shouldCoerceBoolean =
+          key === 'user-invocable' || key === 'user-invokable' || !isQuoted;
 
         if (value) {
-          // Strip YAML quotes
-          const unquoted = (value.startsWith('"') && value.endsWith('"')) || (value.startsWith("'") && value.endsWith("'"))
-            ? value.slice(1, -1)
-            : value;
-          frontmatter[key] = unquoted === 'true' ? true : unquoted === 'false' ? false : unquoted;
+          frontmatter[key] = shouldCoerceBoolean
+            ? unquotedValue === 'true'
+              ? true
+              : unquotedValue === 'false'
+                ? false
+                : unquotedValue
+            : unquotedValue;
           currentKey = key;
           currentArray = null;
         } else {