> ## Documentation Index
> Fetch the complete documentation index at: https://docs.optimism.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Network Notices

> Active upgrade notices, deprecations, and network change announcements for OP Stack operators.

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](/op-stack/protocol/network-upgrades) recording its
activation times, governing spec, and minimum component versions, and
contract-only upgrades are listed in the registry's
[contract upgrades table](/op-stack/protocol/network-upgrades#contract-upgrades) —
notices are archived after activation, registry pages are forever.

## Network upgrades

<CardGroup cols={1}>
  <Card title="Upgrade 19" href="/notices/upgrade-19" icon="triangle-exclamation" horizontal>
    L2 Contract Manager, Osaka on L2, Kona Respected Game Type
  </Card>

  <Card title="Interop Activation Prep" href="/notices/interop-prep" icon="circle-info" horizontal>
    OP Sepolia and Unichain Sepolia interop activation preparation
  </Card>
</CardGroup>

## Deprecations

<CardGroup cols={1}>
  <Card title="End of Support: op-geth" href="/notices/op-geth-deprecation" icon="circle-xmark" horizontal>
    Migrate to op-reth before May 31, 2026
  </Card>

  <Card title="op-deployer Upgrade Deprecation" href="/notices/op-deployer-upgrade-deprecation" icon="triangle-exclamation" horizontal>
    The op-deployer upgrade flow has been deprecated
  </Card>

  <Card title="ReqResp CL Sync Deprecation" href="/notices/req-resp-cl-sync-deprecation" icon="triangle-exclamation" horizontal>
    The ReqResp consensus layer sync mechanism is deprecated
  </Card>
</CardGroup>

## Operations

<CardGroup cols={1}>
  <Card title="Specialized Node Topology" href="/notices/specialized-node-topology" icon="circle-info" horizontal>
    Guidance for Supernode and Light CL node topology
  </Card>

  <Card title="Stake-Based Priority Ordering" href="/notices/stake-based-priority-ordering" icon="circle-info" horizontal>
    New transaction priority ordering mechanism for sequencers
  </Card>
</CardGroup>