How to Set Up Replay MCP with Claude Code in Under 10 Minutes

Claude Code is a conversational coding agent designed to troubleshoot complex bugs that aren't easily explained by stack traces, such as race conditions and intermittent test failures. It works efficiently with Replay, a tool that provides runtime context by capturing every DOM state, variable value, and network request at the moment of failure, making it easier to diagnose issues without needing to reproduce them. To use Replay with Claude Code, users need to install the Replay CLI and set up their environment, which involves configuring authentication and installing necessary skills for the agent to use Replay's tools effectively. Once set up, Claude Code can leverage Replay to access detailed information such as the DOM state, React component tree, and network request timing during debugging sessions. This integration allows for more precise identification of root causes by setting retroactive breakpoints and accessing console outputs. For further enhancement, users can integrate Playwright for automated recording of test failures, and utilize specialized tools for Redux or TanStack Query to gain deeper insights into application state and cache. Universal mode in Replay is ideal for broader investigations, while per-recording mode offers a focused approach for specific issues.