ai-regression-testing

name	ai-regression-testing
description	Use when regression testing for AI-assisted development — sandbox-mode API testing without DB, automated bug-check workflows, and patterns for AI blind spots where same model writes and reviews code. Use only when AI agents have modified API routes, after bug fixes, or running bug-check review.

AI Regression Testing

Adapted from ECC's ai-regression-testing skill (MIT).

Testing patterns specifically designed for AI-assisted development, where the same model writes code and reviews it — creating systematic blind spots that only automated tests can catch.

When to Activate

• AI agent (OpenCode, Cursor, Codex) has modified API routes or backend logic
• A bug was found and fixed — need to prevent re-introduction
• Project has a sandbox/mock mode that can be leveraged for DB-free testing
• Running /bug-check or similar review commands after code changes
• Multiple code paths exist (sandbox vs production, feature flags, etc.)

The Core Problem

When an AI writes code and then reviews its own work, it carries the same assumptions into both steps.

See REFERENCE.md for setup, test helpers, regression test patterns, bug-check workflow, common AI regression patterns with code examples, and best practices.