What's New in P4 Code Review 2026.3

Released: August 2026

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

Added support for OpenAPI docs

Explore and integrate with the P4 Code Review REST API more easily using OpenAPI documentation. You can view available endpoints, request formats, and response details directly from the P4 Code Review user interface.

To view the available API endpoints, append api/docs to your P4 Code Review URL.

To learn more, see API endpoints (v11).

Azure OpenAI support

P4 Code Review now supports Azure OpenAI as an AI vendor. Administrators can configure Azure OpenAI directly from the AI Configuration UI. To learn more see Configuration Azure-specific authentication and API requirements are handled automatically, eliminating the need for manual PHP configuration changes. The reviewer experience is unchanged.

Webhooks for external integrations

Integrate P4 Code Review with external systems using webhooks. Webhooks send event data to external services when review activity occurs, making it easier to trigger automation, update ticketing systems, notify chat tools, or connect AI-based workflows.

Administrators can create webhook definitions, test deliveries, monitor delivery history, and retry failed events.

To learn more, see Webhooks.

Real-time updates for review pages

Stay up to date with review activity without manually refreshing the page. When enabled, review pages update automatically as activity occurs, including reviewer changes, votes, status updates, and CI activity.

This feature complements existing email, Slack, and Jira notifications.

Open Projects

Apply review policies to shared code areas without managing large project membership lists. Open projects allow administrators to enforce workflows, tests, and checklists while allowing any authenticated user to participate in reviews and approvals.

This is useful for teams that want consistent review governance without restricting collaboration.

To learn more, see Open projects

Default reviewer improvements

P4 Code Review now manages default reviewers more intelligently when review content or project configuration changes.

Default reviewers are automatically added or removed as project branch rules begin or stop matching files in a review, helping keep reviewer lists accurate and up to date.

Slack integration improvements

Improve team communication with enhanced Slack integration capabilities. This release adds support for multiple Slack workspaces, targeted notifications, expanded user mentions, configuration in the user interface, and image previews in notifications.

These improvements make Slack notifications easier to manage and more relevant to the people who need them.

To learn more, see Slack integration.

Activity record retention and cleanup

Manage activity data growth more effectively with automatic cleanup of older activity records. Administrators can configure a retention period to remove outdated records and help keep high-volume environments running efficiently.

To learn more, see Activity cleanup.

Improved protection filtering for review comments

Improved security and privacy by restricting review comment visibility when users do not have read access to at least one file in a review. This is controlled by the restrict_review_comments configurable, which is enabled by default.

Valkey support

P4 Code Review now officially supports Valkey as a cache backend. This provides a supported alternative for organizations that prefer Valkey while maintaining Redis-compatible behavior.

To learn more, see Redis and Valkey configuration.

Improved review experience

Several updates improve the review experience and make it easier to work with large reviews and complex code changes.

These enhancements include improved handling of large draft comments, better support for viewing long lines in diffs, and other usability improvements throughout the review interface.

Added support for P4D 2026.1

P4 Code Review now supports P4D 2026.1.

Security, performance, and reliability improvements

This release includes a range of performance, security, and stability enhancements.

Highlights include improved handling of very large reviews, performance optimizations for caching and page loading, strengthened access controls, security updates, dependency upgrades, and fixes across API, authentication, AI, and review workflows.

For a complete list of fixes, see the the release notes.