Summary

This proposal seeks approval to activate Upgrade 19 on Metal L2, aligning the network with the latest OP Stack release.

Reference: https://docs.optimism.io/notices/upgrade-19

Upgrade 19 introduces major improvements across the OP Stack, including:

• L2CM (L2 Contract Manager)

• OPCMv2

• Osaka EIPs on L2

• Glamsterdam Defense

• Promotion of CANNON_KONA to the respected game type

While Metal L2 is preparing for its future migration to a sovereign Metal Blockchain subnet under MIP-002: Homecoming (https://metalhomecoming.com), it is important that we continue maintaining our OP Stack deployment and remain current with Superchain upgrades during the transition period.

Activation

Activation timestamps for Sepolia and Mainnet have not yet been published by OP Labs.

Metal L2 will follow the official OP Stack activation schedule once announced.

Important Operator Requirements

Chain operators and node operators must upgrade all required off-chain components before activation.

Permissionless fault proof chains must configure op-challenger for cannon-kona ahead of the upgrade.

⚠️ op-geth and op-program will not support Upgrade 19.

Operators must migrate to:

• op-reth

• kona-client

before activation.

End of support for legacy components is scheduled for 31 May 2026.

Application Developer Notes

Most applications will be unaffected. However, developers should review updated gas limit behavior outlined in the OP Labs notice.

Date Change Policy

Metal L2 will follow any updated activation schedules published by OP Labs to remain aligned with the Superchain roadmap.

Rationale

Activating Upgrade 19 ensures Metal L2 continues operating securely and reliably for institutional and DeFi applications while the network transitions toward the Metal Blockchain subnet architecture.

Voting Options

• YES — Approve Upgrade 19

• NO — Reject the upgrade

• ABSTAIN — No preference

If approved, Metal L2 engineering will schedule activation once official OP Labs timestamps are released.