JetBrains Releases Rider and ReSharper 2026.2.2 with AI Agent Enhancements
New update introduces AI Agent Setup widget and improved test coverage for TUnit.
1AI Agent Setup widget
Rider 2026.2.2 introduces a new AI Agent Setup widget in the bottom-right status bar. This centralizes all coding agent features including MCP tools, skills, and hooks. The widget shows enabled features and provides direct links to settings pages. It works whether agents run inside Rider or external terminals, simplifying setup and discovery of available functionalities.
2Improved hooks for AI agents
Rider's updated hooks now provide more targeted feedback to AI agents after code changes. The Run files inspections hook only shows results for code the agent added, not entire files. The Reformat file hook displays diffs of IDE formatting changes, eliminating need to reread files. These changes reduce noise and help agents focus on relevant changes.
3TUnit test coverage support
Rider's dotCover integration now supports measuring coverage for TUnit unit tests. Developers must install JetBrains.dotCover.Framework package and enable Testing Platform support in settings. The feature requires Microsoft.Testing.Platform version 2.3.0 or later. This expands Rider's testing capabilities for projects using the TUnit framework.
4macOS freeze fix
The update resolves a critical issue where Rider could freeze indefinitely on macOS 26.2.2. The problem occurred when collecting thread dumps from backend processes due to a broken macOS system API call. The fix ensures proper process resumption after suspension, restoring full macOS support. This primarily affected users working with large solutions.
5Unity Editor attachment improvement
Rider's Attach to Unity Editor feature no longer depends on the editor executable name. This change addresses compatibility issues with recent Unity Hub versions and custom engine builds. The modification makes the attachment process more reliable across different Unity configurations and development setups.
6MCP server access fixes
File operations now work correctly across all folders attached to solutions, not just the main directory. This resolves previous MCP server access errors that limited functionality in attached folders. The improvement enhances Rider's performance when working with complex, multi-folder solution structures.
7Update installation options
The 2026.2.2 update can be installed through the tools themselves, the Toolbox App, or JetBrains' website. Rider is also available as a snap package for Linux users. The release includes numerous other fixes and improvements detailed in the full release notes available on JetBrains' documentation site.
8Developer workflow impact
This update significantly enhances Rider's AI agent capabilities while improving stability and compatibility. The new widget simplifies agent feature discovery, while hook improvements optimize agent workflows. Expanded test coverage and critical bug fixes make this a substantial quality-of-life improvement for developers across platforms.