What The Diff

• Automated generation of pull request descriptions from code diffs
• Plain-English summaries of changes for non-technical stakeholders
• Changelog creation from merged pull requests with JSON API output
• Weekly progress reports summarizing team activity in natural language
• Inline AI refactoring: propose and apply code improvements in a pull request
• Slack, email and webhook notifications for pull request updates or summaries
• Multi-language support for summaries and notifications
• Fine-grained repository level settings (exclude files, limit tokens, skip drafts)
• Unlimited repository support under all plans
• API and integration with GitHub and GitLab for direct workflow embedding

What The Diff is an AI-powered tool designed to streamline and enhance the code review process for development teams. It connects directly to your GitHub or GitLab repositories and analyses the “diff” of each pull request to generate a rich descriptive summary of the changes, written in clear, accessible language. This means that instead of spending time writing or reading long descriptions, teams can quickly grasp what has changed, why it changed and what implications it carries for the project.

Beyond simply summarising pull requests, What The Diff offers features suited for broader team collaboration. It can generate weekly progress reports that aggregate the week’s changes and send them via Slack, email or webhooks. The tool also enables the creation of public- or internal-facing changelogs by compiling merged pull request summaries, which can be distributed or consumed as a JSON feed. For developers, inline AI refactoring means you can comment with a shorthand command and receive suggested code improvements which you can accept, reducing back-and-forth in reviews.

Managers and non-technical stakeholders benefit from translated or simplified summaries that keep them in the loop without needing to parse code. At the same time engineers keep control through repository-level settings: you can set maximum tokens per pull request, exclude build or minified files, ignore CI-generated branches or opt-in for comment triggers only. The free plan provides a generous token allowance to start, and paid plans scale for teams with higher volume of pull requests or larger codebases. By automating much of the repetitive overhead in pull request workflows, What The Diff helps teams move faster, improve code clarity, enhance communication and reduce review bottlenecks.