Here is a vibe coded rebase of BIP-444 by @Luke Dashjr & Dathon onto Bitcoin Core version 30. To be clear - this thing vibe coded all the merge conflicts, do not use this for real money, just a visual aid:

GitHub

Vibe Coded rebase of 444 onto version 30 by Rob1Ham · Pull Request #1 · Rob1Ham/bitcoin

To be clear - for visualization purposes only, for the love of Satoshi do not do anything with this code that touches even regtest.