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Documentation | 2025.4

# What's New in P4 Code Review 2025.4

Released: October 2025

For a complete list of what’s new and bug fixes in this release, see the release notes.

## Added syntax highlighting for shader files

To make it easier to read and review shader code, syntax highlighting has been added for the following file types:

- `.hlsl`

- `.usf`

- `.ush`

## Enhance comments with AI

To help you improve the text within a comment, an AI assistant has been added to the comments box in the Review page. After you have entered text into the comment box, you can use the AI assistant to review what you have written before posting the comment. You can choose from the following options:

- Improve comment

- Summarize writing

- Fix spelling and grammar

The text is sent to an AI vendor and returned for you to review before posting the comment. You can also add custom prompts to the AI assistant. For information on how to update the AI assistant prompts, see AI Assistant for comments.

## Improved icons in changelist

To make it easier to see how a file has been modified within a changelist, new icons have been added to the review page. There are seven new icons for the following different file modifications:

- Files added

- Files edited

- Files deleted

- Files added and moved

- Files moved and deleted

- File branched

- File integrated

For more information on these new icons, see File list.

## Added API keys to AI configuration

To offer more flexibility when configuring AI integrations, you can now specify both the `api_key` and `api_end_point` in OpenAI, GenericAI, and CustomAI configurations.

## PHP 8.1 Deprecation Notice

From version 2025.5, P4 Code Review will drop support for PHP 8.1.

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