sanity-check
✓Before building on assumptions, validates them first. Activates when making claims about how code works, what exists, or why something happens. Prevents assumption cascades where one wrong guess leads to a completely wrong solution.
Installation
SKILL.md
Claude confidently builds on assumptions that turn out to be wrong. "The auth middleware probably checks X" becomes a 50-line solution for a problem that doesn't exist. This skill forces verification of key assumptions before building on them.
| Function X does Y | Read the function | Verified / Wrong | | Error caused by Z | Check error logs | Verified / Wrong | | File imported by W | Grep for imports | Verified / Wrong |
Stop if any key assumption is wrong. Don't patch - reassess.
Before building on assumptions, validates them first. Activates when making claims about how code works, what exists, or why something happens. Prevents assumption cascades where one wrong guess leads to a completely wrong solution. Source: elliotjlt/claude-skill-potions.
Facts (cite-ready)
Stable fields and commands for AI/search citations.
- Install command
npx skills add https://github.com/elliotjlt/claude-skill-potions --skill sanity-check- Category
- </>Dev Tools
- Verified
- ✓
- First Seen
- 2026-02-11
- Updated
- 2026-02-18
Quick answers
What is sanity-check?
Before building on assumptions, validates them first. Activates when making claims about how code works, what exists, or why something happens. Prevents assumption cascades where one wrong guess leads to a completely wrong solution. Source: elliotjlt/claude-skill-potions.
How do I install sanity-check?
Open your terminal or command line tool (Terminal, iTerm, Windows Terminal, etc.) Copy and run this command: npx skills add https://github.com/elliotjlt/claude-skill-potions --skill sanity-check Once installed, the skill will be automatically configured in your AI coding environment and ready to use in Claude Code or Cursor
Where is the source repository?
https://github.com/elliotjlt/claude-skill-potions
Details
- Category
- </>Dev Tools
- Source
- skills.sh
- First Seen
- 2026-02-11