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

# Project history

> Audit all project changes with version history showing who made what and when.

Use Project History to audit when changes were made, who made them, and what went into each version. When diagnosing regressions, you can identify exactly which version introduced a problem and roll back if needed. A complete audit trail supports compliance requirements and team accountability.

The **Project history** page is found under **Deployments > Project history**. Each entry shows the event type, author, and timestamp.

<img src="https://mintcdn.com/polyai/0bpLfk5OJEC91MQz/images/environments-and-versions/project-history.png?fit=max&auto=format&n=0bpLfk5OJEC91MQz&q=85&s=d592bb953af5cb80756198b8f8b221b1" alt="Project history page showing a list of project events including deployments and branch merges." width="3016" height="1380" data-path="images/environments-and-versions/project-history.png" />

## Viewing history

1. Go to **Deployments > Project history** in the sidebar.
2. Versions appear in **reverse chronological order** (newest first).
3. Each entry shows the event type (published version, branch merge, or deleted draft), description, author, and timestamp.

## Comparing versions

Select any two versions to view a side-by-side diff of changes.

Compare versions to:

* Audit what changed between deployments
* Review changes before promoting to a new environment
* Diagnose issues introduced in a specific version

For more details on version comparison, see [Compare versions](/environments-and-versions/diffs).

## Related pages

<CardGroup cols={2}>
  <Card title="Environments" icon="server" href="/environments-and-versions/introduction">
    Manage the deployment pipeline and version promotion.
  </Card>

  <Card title="Compare versions" icon="code-compare" href="/environments-and-versions/diffs">
    Side-by-side diff view of any two versions.
  </Card>
</CardGroup>