Is the Flashbots "builder" repository used for ETH staking relayers or something else?

Hi Flashboters, I’m a researcher and nomad looking to learn more about Ethereum by running a validator on testnet. This week I’m starting research on remote self staking (RSS) [1] as I wrap up my current project on the Safe grants council helping teams finish wave 1 of the grants program.

Much appreciated!

*None of the info I share or receive is financial or legal advice.

[1]: Remote self staking (RSS) = Running an ETH staking validator in a separate location than where you live/spend most of your time, e.g. nomads.