Genesis upgrade
Genesis is a major update to the BitcoinSV mining client which is used by the majority of miners on the BitcoinSV network.
The upgrade is seen as a return to the original Bitcoin protocol, and includes the removal of all limit based consensus rules, and their replacement with miner configurable settings that give node operators the autonomy needed to set their own limits as they determine are practical.
The full specification is available here.
Genesis is scheduled to go into effect on or around the 4th of February 2019.
See also:
https://bitcoinsv.io/2020/01/15/changes-for-the-genesis-upgrade/
https://www.prnewswire.com/news-releases/bitcoin-svs-genesis-hard-fork-300989579.html
The four following areas of the protocol and specification contain the changes required for the Genesis upgrade
Block Consensus Rules
Block Size - The size of a block in bytes of the serialized form of
the block including the block header and all of the transactions confirmed by the block.
Number of CheckSig Operations per MB of Block Space
Transaction Consensus Rules
Maximum Transaction Size - The size of a transaction is the size in
bytes of the serialized form of the transaction. The maximum size of a transaction is 1GB (1,000,000,000 bytes). This limitation is expected to be lifted in the future.
Maximum Number of CheckSig Operations per Transaction
nLockTime
nSequence
Script Language Rules P2SH sunset
Standard Local Policies
Maximum Acceptable Transaction Size Policy
Transaction Evaluation Timeout