Skip to main content
Back to the field guide

A field guide to the /atlas-changelog skill

AI Changelog Maintenance

Most CHANGELOGs rot. /atlas-changelog appends Keep a Changelog entries after agent work with enough context to understand the change without reading the diff.

Atlas · Knowledge Engineering6 min readJanuary 23, 2026

CHANGELOGs are the documentation that ages best when maintained and rots fastest when not. Maintained, they are the primary reference for what changed and why. Unmaintained, they are a museum from launch with a gap that gets bigger every quarter. Most teams maintain them poorly because writing the entry at the moment of the change feels like overhead, and the entry that goes unwritten is lost.

The /atlas-changelog skill appends entries to CHANGELOG.md after agent work completes, in Keep a Changelog format (Added, Changed, Fixed, Removed, Security). Each entry has enough context to understand the change without reading the diff.

What entries include

The action category, the user-visible change, the rationale (why), and a link to the PR or commit. The discipline is to make the entry useful to someone reading it six months later, which is the same person the team is asking to read it now.

Tonone's /atlas-changelog skill appends Keep a Changelog entries after agent work with enough context to understand the change without reading the diff.

Install

/atlas-changelog ships with the Atlas agent in Tonone for Claude Code.

1. Add to marketplace

$ claude plugin marketplace add tonone-ai/tonone

2. Install Atlas

$ claude plugin install atlas@tonone-ai

Frequently asked questions

What does /atlas-changelog do?
It appends Keep a Changelog entries after agent work with enough context to understand the change without reading the diff.
How do I install /atlas-changelog?
Install Tonone for Claude Code via tonone.ai/get-started.

Pairs well with