tailtest или memoriant-test-coverage-skill

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.

AST-powered test coverage analysis for Claude Code. Scans source and test directories, identifies untested functions by parsing Python abstract syntax trees, and generates pytest test skeletons automatically. Finds coverage gaps that line-based tools miss by understanding function signatures, class methods, and module structure.