Moonbeam RT Upgrade 3900

[themacexpert]

Description

This pull request updates documentation and configuration files to reflect the release of the Moonbeam runtime upgrade 3900. The changes ensure that references to the latest runtime version and corresponding block numbers are accurate across the codebase.

Runtime upgrade references:

• Updated the runtime upgrade table in builders/build/runtime-upgrades.md to include the block number for the 3900 upgrade on Moonbeam, ensuring consistency with Moonriver and Moonbase Alpha.
• Changed the spec_version for Moonbeam from runtime-3800 to runtime-3900 in variables.yml, aligning configuration with the latest release.

Documentation accuracy:

• Updated the line reference in the Moonbeam XCM instruction weight-to-balance conversion table in builders/interoperability/xcm/core-concepts/weights-fees.md from lib.rs#L163 to lib.rs#L165, reflecting changes in the source code location for the relevant constant.

Checklist

• Added a label 🏷️ to this PR
• Ran my changes through Grammarly
• Added a disclaimer if required
• If pages were moved, opened a corresponding PR in moonbeam-mkdocs to update redirects

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Translations

Does this PR update a page that also exists on the Chinese docs site? See mapping to confirm.

• Yes
• No

If Yes, complete the following:

• Opened a PR on the Chinese docs repo for the corresponding page
• Updated images, snippets, or variables if they were moved, renamed, or deleted

Link to the corresponding CN docs PR: <INSERT_LINK>

[Copilot]

Pull Request Overview

This PR updates documentation and configuration to reflect the Moonbeam runtime upgrade 3900 release. The changes ensure all references to runtime versions and block numbers are current and accurate.

Key changes:

• Updated Moonbeam spec_version from runtime-3800 to runtime-3900 in configuration
• Added Moonbeam block number for runtime 3900 upgrade in documentation table
• Corrected source code line reference for XCM weight conversion constant

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
variables.yml	Updates spec_version to runtime-3900 for Moonbeam network configuration
builders/build/runtime-upgrades.md	Adds Moonbeam block number (12960124) for runtime 3900 upgrade
builders/interoperability/xcm/core-concepts/weights-fees.md	Updates source code line reference from L163 to L165 for XCM weight constant

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[eshaben]

Looks like this block is in 3800

[themacexpert]

We've been using this extrinsic: system (CodeUpdated) as the old runtimeUpgradeStarted is decommed (https://moonbeam.subscan.io/event?module=migrations&event_id=RuntimeUpgradeStarted)

It takes a few blocks before the runtime is considered complete, so it the new runtime number will show in the spec version 2 blocks later in that particular example. Open to ideas if you want to reconsider which block number we show.

[eshaben]

So there's no way to get the exact block? I went 2 blocks later and it still wasn't 3900. Just kiddinggg, I was originally on the wrong block haha. Ok, so it's always going to be 2 blocks later? So far we've been consistent in this table showing the exact block, so I'd like to try to keep doing that if it's feasible

[github-actions]

Style Guide Violations Summary

builders/build/runtime-upgrades.md (Line 100)

• Issue:
  Inconsistent table cell padding; first column has excessive spaces compared to other columns violating table formatting standards

• Correction:

| [3900](https://forum.moonbeam.network/t/runtime-rt3900-schedule/2262){target=_blank} | [12960124](https://moonbeam.subscan.io/block/12960124){target=_blank} | [13423617](https://moonriver.subscan.io/block/13423617){target=_blank} | [13744972](https://moonbase.subscan.io/block/13744972){target=_blank} |

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builders/interoperability/xcm/core-concepts/weights-fees.md (Line 153)

• Issue:
  Important numeric values representing code constants should be bolded as they are 'can't-miss, important things' per style guide

• Correction:

| **[{{ networks.moonbeam.xcm.instructions.wei_per_weight.display }}](https://github.com/moonbeam-foundation/moonbeam/blob/{{networks.moonbeam.spec_version}}/runtime/moonbeam/src/lib.rs#L165){target=_blank}** | **[{{ networks.moonriver.xcm.instructions.wei_per_weight.display }}](https://github.com/moonbeam-foundation/moonbeam/blob/{{networks.moonriver.spec_version}}/runtime/moonriver/src/lib.rs#L173){target=_blank}** | **[{{ networks.moonbase.xcm.instructions.wei_per_weight.display }}](https://github.com/moonbeam-foundation/moonbeam/blob/{{networks.moonbase.spec_version}}/runtime/moonbase/src/lib.rs#L169){target=_blank}** |

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[github-actions]

Verification Review

This review focuses on style guide claims, justifications, and confidence scores in the provided documents.

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builders/build/runtime-upgrades.md (Line 96)

• Claim:
  12960124{target=_blank}

• Context:

| 3900{target=_blank} | 12960124{target=_blank} | 13423617{target=_blank} | 13744972{target=_blank} |

• Justification:

The block number for a runtime upgrade is a specific factual data point that must be verified against the blockchain explorer to ensure accuracy and avoid documentation errors.

• Requires Verification: Yes
• Confidence Score: 1

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