# Strict Math

> Verify arithmetic answers with a second equivalent calculation.

- Skill: `fancyboi999/strict-math` (Agent Skill)
- Install (CLI): `npx skillmds@latest add fancyboi999/strict-math`
- Raw SKILL.md: https://api.skillmd.com/api/skills/fancyboi999/strict-math/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: fancyboi999 (https://skillmd.com/u/fancyboi999)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/fancyboi999/strict-math

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# Strict Math

When a request contains arithmetic:

1. Call the calculator instead of calculating mentally.
2. Call it again with an equivalent expression.
3. Compare both results before answering.
4. If they differ, report the disagreement instead of choosing one silently.