claude-crap vs. tailtest

Deterministic Quality Assurance plugin for Claude Code. CRAP stands for Change Risk Anti-Patterns — a metric originally developed by Alberto Savoia and Bob Evans at Google in 2007 to identify code that is both complex and under-tested. Inspired by their work. Claude-crap wraps every Write, Edit, and Bash tool call with a PreToolUse gatekeeper, a PostToolUse verifier, and a Stop quality gate backed by the CRAP index, Technical Debt Ratio, tree-sitter AST metrics, and SARIF 2.1.0 reports. Auto-detects and runs ESLint, Semgrep, Bandit, and Stryker at boot so users get real A..E quality grades out of the box. Forbids the agent from writing functional code before a test safety net exists (the Golden Rule).

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.