# File Validator

> Validate a filename extension without opening any filesystem path

- Skill: `gabrielmoreira/file-validator` (Agent Skill)
- Install (CLI): `npx skillmds@latest add gabrielmoreira/file-validator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/gabrielmoreira/file-validator/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- License: Apache-2.0
- Author: gabrielmoreira (https://skillmd.com/u/gabrielmoreira)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/gabrielmoreira/file-validator

---


# File Validator

Use [validate.py](validate.py) to check whether a filename has an allowed
extension. The helper performs no I/O.