tailtest или tdd-evolutionary-loop

tailtest automatically generates and runs tests every time Claude Code edits a file. No commands, no configuration, no reminders needed. It hooks into Claude's file write event, detects your language and test runner automatically, generates production-like test scenarios for the code that was just written, and runs them immediately. If everything passes, it stays silent. If something breaks, you see it in the same session while the context is still fresh. Supports Python (pytest), TypeScript and JavaScript (vitest, jest), Go, Rust, Ruby, Java, and PHP. Works on new projects and existing codebases. On first run, a ramp-up scan queues your existing untested files for gradual background coverage.

Automate the TDD cycle with a collaborative agent team: two parallel coders and a devil's advocate, working on isolated files for rapid, safe iteration. Describe a feature or point to failing tests and the plugin handles the rest — writing tests, implementing in parallel variants, reviewing code quality, and promoting the best result.