The Api had a version of it in ApiFormatYaml_spypc or something. Tim stripped out a lot of crap from it (security or something).

Noticed you optionally include it

00077 public static function dump( $text ) {
00078 global $wgTranslateYamlLibrary;
00079
00080 switch ( $wgTranslateYamlLibrary ) {
00081 case 'spyc':
00082 require_once( dirname( FILE ) . '/../spyc/spyc.php' );
00083 return Spyc::YAMLDump( $text );
00084 case 'syck':
00085 return self::syckDump( $text );
00086 default:
00087 throw new MWException( "Unknown Yaml library" );
00088 }
00089 }

Do you still need a seperate version?

Version: unspecified
Severity: minor