Edge Case Discovery

What this skill does

This skill directs the agent to systematically work through a function, API endpoint, or user flow and enumerate all edge cases and boundary conditions that could cause incorrect behavior, errors, or security issues. It applies a structured checklist across multiple dimensions (data types, boundary values, state, concurrency, authorization) and outputs a prioritized list of cases to test or guard against.

Use this before writing tests, during code review, when designing a new feature, or when a production bug makes you wonder "what else could go wrong here."

How to use

Claude Code / Cline

Copy this file to .agents/skills/edge-case-discovery/SKILL.md in your project root.

Then ask:

• "Use the Edge Case Discovery skill on the transferFunds function."
• "Find edge cases for the POST /api/orders endpoint using the Edge Case Discovery skill."
• "What edge cases should I handle in the user registration flow? Use the Edge Case Discovery skill."