Roo Code 3.21.1 Release Notes (2025-06-18)

This patch release improves stability, security, and provides better error handling for several key features.

Bug Fixes

Parser Reliability: Fixed an issue that could prevent the parser from loading correctly in certain environments, improving overall stability (#4857)
Windows Stability: Resolved a crash that could occur when using MCP servers on Windows with node version managers (#4711)
Subtask Rate Limiting: Implemented global rate-limiting to prevent errors when creating subtasks, ensuring more reliable task execution (thanks olweraltuve!) (#4453)
Codebase Search Errors: Improved error messages for codebase search, making it easier to diagnose and resolve issues with embeddings (#4432)

Anthropic Cost Tracking: Improved the accuracy of cost reporting for Anthropic models (#4849)
Performance Optimization: The "Enable MCP Server Creation" setting is now disabled by default, reducing token usage and simplifying prompts for most users (#4838)
Security: Addressed security vulnerabilities by updating dependencies (#4844)