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Notices are time-bound action items for application developers, node operators, and chain operators: upcoming network upgrades, deprecations, and operational changes. Each hardfork also has a permanent entry in the hardfork registry recording its activation times, governing spec, and minimum component versions, and contract-only upgrades are listed in the registry’s contract upgrades table — notices are archived after activation, registry pages are forever.

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Network upgrades

Upgrade 20

Prepare Fault Proof services for Super Root Dispute Games and other maintenance smart contract upgrades

Interop Activation Prep

OP Sepolia and Unichain Sepolia interop activation preparation

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Operations

Specialized Node Topology

Guidance for Supernode and Light CL node topology