SeedXOR is not a project per say, its just a formal guidance on how you can apply the XOR mathematical operator to securely turn multiple mnemonics into 1.

It has some neat properties:

1. Every mnemonic is a valid wallet
2. As long as each mnemonic is random, learning 1 mnemonic does not reveal anything about the others, nor about your combined result.

Do you have any specific questions about it?