... system for HTTP requests. Why it matters When a bug only happens in production, try to reproduce it becomes the bottleneck. With Replay, you can record real requests , replay them locally or in staging , and diff the new response vs the recorded one instantly. What s included in v0.1.300 ReplayLayer middleware for automatic request/response recording Stores: InMemoryReplayStore + FileSystemReplayStore Admin HTTP routes to list, replay, and diff entries ReplayClient for programmatic replay testing Security: disabled by default , bearer