> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-feat-add-changelog.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Changes introduced by Base protocol upgrades.

This changelog tracks developer-facing changes introduced by Base protocol upgrades.

## Upgrade changelogs

Select an upgrade in the sidebar to view its changes:

* [Beryl](/base-chain/changelog/beryl)
* [Cobalt: B20](/base-chain/changelog/cobalt/b20)
* [Denim](/base-chain/changelog/denim)