Upgrade proposal: MCP - This protocol upgrade strengthens the security and upgradeability of the Superchain by enabling L1 contracts to be upgraded atomically across multiple chains in a single transaction. This upgrade also extends the SystemConfig to contain the addresses of the contracts in the network, allowing users to discover the system’s contract addresses programmatically. The upgrade is code complete as of commit e6ef3a900c42c8722e72c2e2314027f85d12ced5 (release and tag) in the Optimism monorepo.

This proposal is eligible for Voting Cycle #19: https://gov.optimism.io/t/upgrade-proposal-6-multi-chain-prep-mcp-l1/7677

If passed in the Token House, it will proceed to a veto period in the Citizens’ House.