saying 'no code' from rivals seems highly misleading, and I can't seem to see a hard citation for this, in fact, it very directly contradicts this same sentence from the article
He also said that unlike SerenityOS, Ladybird will “leverage the greater OSS ecosystem,” meaning that it will use other open source libraries for some features.
it would be better to say they aren't relying on libraries and features from rivals. not that they will use "no code" from them, good code is good code afterall