The Open Source Definition does not require any specific development methodology. Open Source with a private bug tracker is still Open Source. Open Source was

The Open Source Definition does not require any specific development methodology. Open Source with a private bug tracker is still Open Source. Open Source was promoted as a pragmatic method to write better software, and public ("bazaar") development was recommended over private ("cathedral") development. But this is more a case of marketing than legal terms. The Open Source Definition was inspired by the Free Software Definition, and in practice is almost identical. Free Software is primarily about ethics, not software quality, so it has nothing to say about development methodologies. The Open Source Definition did not change this.