Merge pull request #2975 from OffchainLabs/add-how-to-arbos51

update: clean up language for arbos51 release doc

Author: anegg0

docs/run-arbitrum-node/arbos-releases/arbos51.mdx

@@ -17,20 +17,22 @@ import { VanillaAdmonition } from '@site/src/components/VanillaAdmonition';
 
 </VanillaAdmonition>
 
-This page is intended for all Arbitrum node operators and Arbitrum chain owners chains. This page summarizes the changes brought by ArbOS 51 Dia, and what you should do to ensure a seamless upgrade.
+This page is intended for all Arbitrum node operators and Arbitrum chain owners chains. This page summarizes the changes brought by ArbOS 51 "Dia", and what you should do to ensure a seamless upgrade.
 
 <VanillaAdmonition type="warning" title="Action Required">
 
-Before Ethereum <a data-quicklook-from="parent-chain">Parent chain</a> Sepolia and Mainnet upgrade to Fusaka: ensure that your Nitro node version is upgraded and consensus layer client is configured as per the [Fusaka upgrade notice](../../notices/fusaka-upgrade-notice.mdx).
+For operators of Arbitrum chains that settle on a Fusaka-enabled <a data-quicklook-from="parent-chain">Parent chain</a>: ensure that your Nitro node version is upgraded and consensus layer client is configured as per the [Fusaka upgrade notice](../../notices/fusaka-upgrade-notice.mdx).
 
 </VanillaAdmonition>
-The minimum Nitro version that supports ArbOS 51 "Dia" is [Nitro v3.9.3](https://github.com/OffchainLabs/nitro/releases/tag/v3.9.3), which is available on Docker Hub with the image tag `Noffchainlabs/nitro-node:v3.9.3-8bc5554`. This release of Nitro is a mandatory upgrade for <a data-quicklook-from="arbitrum-one">Arbitrum One</a> and <a data-quicklook-from="arbitrum-nova">Nova</a> node operators if adopted. For Arbitrum One and Nova, the ArbOS 51 "Dia" upgrade will require a governance vote to activate.
+
+The minimum Nitro version that supports ArbOS 51 "Dia" is [Nitro v3.9.3](https://github.com/OffchainLabs/nitro/releases/tag/v3.9.3), which is available on Docker Hub with the image tag `offchainlabs/nitro-node:v3.9.3-8bc5554`. This release of Nitro is a mandatory upgrade for <a data-quicklook-from="arbitrum-one">Arbitrum One</a> and <a data-quicklook-from="arbitrum-nova">Nova</a> node operators. For Arbitrum One and Nova, an ArbOS upgrade requires a governance vote to activate; the vote for ArbOS 51 was [passed on December 18, 2025](https://www.tally.xyz/gov/arbitrum/proposal/53154361738756237993090798888616593723057470462495169047773178676976253908001?govId=eip155:42161:0xf07DeD9dC292157749B6Fd268E37DF6EA38395B9) and will be [activated on January 8, 2026](../../notices/arbos51-upgrade-notice.mdx).
 
 As a refresher, ArbOS upgrades get treated as Arbitrum's equivalent of a hard fork. To learn more, refer to the [Arbitrum ArbOS upgrades forum post](https://forum.arbitrum.foundation/t/arbitrum-arbos-upgrades/19695). Note that ArbOS 51 Dia is an upgrade that builds upon [ArbOS 40 Callisto](./arbos40.mdx).
 
 ### Requirements
 
 - Having read and understood the [ArbOS Software Releases Overview page](./01-overview.mdx).
+- Following the [Guide for how to upgrade ArbOS on your Arbitrum chain](../../launch-arbitrum-chain/02-configure-your-chain/common-configurations/13-arbos-upgrade.mdx).
 - Running [Nitro v3.9.3](https://github.com/OffchainLabs/nitro/releases/tag/v3.9.3) or higher, which is available on Docker Hub with the image tag `offchainlabs/nitro-node:v3.9.3-8bc5554`.
   - Note that it's important to run Nitro v3.9.3 only against trusted databases. If you want to use an untrusted database, you can first remove the `wasm` directory if it exists (potentially inside the `nitro` folder). Otherwise, the database may have malicious, unvalidated code that can result in remote code execution. Avoiding unvalidated code is also mitigated by ensuring you run the <a data-quicklook-from="arbitrum-nitro">Arbitrum Nitro</a> node inside Docker.
 - Running [nitro-contracts v3.1.0](https://github.com/OffchainLabs/nitro-contracts/releases/tag/v3.1.0) or higher
@@ -146,8 +148,8 @@ While ArbOS 51 Dia will be compatible with both `nitro-contracts 3.1.X` and `nit
 - [nitro-contracts v3.1.1](https://github.com/OffchainLabs/nitro-contracts/releases/tag/v3.1.1)
 - [nitro-contracts v2.1.3](https://github.com/OffchainLabs/nitro-contracts/releases/tag/v2.1.3) (only relevant for Arbitrum chains that don't have BoLD enabled yet)
 - [On-chain vote to Activate ArbOS 51 (Dia) and Gas Pricing Updates](https://www.tally.xyz/gov/arbitrum/proposal/53154361738756237993090798888616593723057470462495169047773178676976253908001?govId=eip155:42161:0xf07DeD9dC292157749B6Fd268E37DF6EA38395B9)
-- [Temperature check vote on Snapshot for ArbOS 50 Dia](https://snapshot.box/#/s:arbitrumfoundation.eth/proposal/0x33754da4006d0ef38666ec5d5e85fd0966a891a594ab9dc21f23beedea2d330b)
-- [Temperature check vote on Snapshot for AIP: Raising the gas target & improvements to pricing algorithm](https://snapshot.box/#/s:arbitrumfoundation.eth/proposal/0x4a96a91d162975de0d402b83ca8b8a24e808ca357150120fc0d44ae0bf1cc4a5)
-- [AIP: ArbOS Version 50 Dia Forum Post](https://forum.arbitrum.foundation/t/constitutional-aip-arbos-version-50-dia/)
-- [AIP: Raising the gas target & improvements to pricing algorithm Forum Post](https://forum.arbitrum.foundation/t/aip-raise-the-gas-target-implement-improvements-to-the-pricing-algorithm/30182)
+- [Temperature check vote on Snapshot for "AIP: ArbOS Version 50 Dia"](https://snapshot.box/#/s:arbitrumfoundation.eth/proposal/0x33754da4006d0ef38666ec5d5e85fd0966a891a594ab9dc21f23beedea2d330b)
+- [Temperature check vote on Snapshot for "AIP: Raising the gas target & improvements to pricing algorithm"](https://snapshot.box/#/s:arbitrumfoundation.eth/proposal/0x4a96a91d162975de0d402b83ca8b8a24e808ca357150120fc0d44ae0bf1cc4a5)
+- [Forum post for "AIP: ArbOS Version 50 Dia"](https://forum.arbitrum.foundation/t/constitutional-aip-arbos-version-50-dia/)
+- [Forum post for "AIP: Raising the gas target & improvements to pricing algorithm"](https://forum.arbitrum.foundation/t/aip-raise-the-gas-target-implement-improvements-to-the-pricing-algorithm/30182)
 - [ArbOS 50 & ArbOS 51 Audit Report, from Trail of Bits](https://github.com/trailofbits/publications/blob/master/reviews/2025-12-offchain-arbos50-and-51-securityreview.pdf)