What's New
In addition to this page, you may also follow us on twitter (@WallabyJs) to be notified whenever we release notable features.
Most Recent Major Features and Changes
The What’s New section includes major features and changes that have been made in the last 12-18 months. For older news or more details about minor updates and changes, please refer to our changelog.
CLI for Coding AgentsMay 27 2026
Wallaby CLI brings runtime intelligence into agentic coding workflows. Whether you're using Claude Code, Codex CLI, Copilot CLI, OpenCode, Pi, or any other AI coding agent, Wallaby can now run directly from the command line without requiring an editor session or an MCP server to be running. This is especially useful for git worktrees and other headless workflows.
Coverage Complexity and Change Risk MetricsMay 26 2026
Wallaby's Coverage tab now helps you prioritize testing and refactoring work by highlighting files where complex code and lower coverage combine to create higher maintenance risk.
Support for Vitest v4.1.4+Apr 10 2026
Wallaby now supports the latest version of vitest (v4.1.4+). The recent update of vitest included major breaking changes that required updates to Wallaby's vitest integration.
Support for Vitest v4.1.0+Mar 13 2026
Wallaby now supports the latest version of vitest (v4.1.0+). The recent update of vitest included major breaking changes that required updates to Wallaby's vitest integration.
Angular v21 Support with VitestMar 12 2026
For Angular CLI v21 workspaces and projects, Wallaby now automatically detects and configures the default Vitest runner. Wallaby runs tests in Node.js environments such as jsdom and happy-dom, or in browsers via playwright or webdriverio, and provides better incremental run performance, reliability, and live results streaming.
Support for Vitest Browser ModeJan 21 2026
Wallaby now supports running Vitest v4.x+ in browser mode, using either the playwright or webdriverio providers. Wallaby will run your browser instances in headless mode by default (overridable by setting headless: false in your vitest config).
Previous major features and changes
Our what’s new archive contains the full history of our major features and changes (starting February 2020).
Full Change Log
Our changelog is available in our public repository. Please note that while we update our changelog every few months, we release new versions of Wallaby a few times a week (sometimes a few times a day).
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