# Invalid Frontmatter

> Invalid Frontmatter

- Skill: `netanlatakademi/invalid-frontmatter` (Agent Skill)
- Install (CLI): `npx skillmds@latest add netanlatakademi/invalid-frontmatter`
- Raw SKILL.md: https://api.skillmd.com/api/skills/netanlatakademi/invalid-frontmatter/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: NetAnlatAkademi (https://skillmd.com/u/netanlatakademi)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/netanlatakademi/invalid-frontmatter

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# Invalid Frontmatter

This sample must produce SF0003 (unparsable YAML) and must never crash the CLI.

The second item under `compatibility` is indented one space less than the first. YAML rejects the
document, and SkillForge has to report that as a diagnostic pointing at the offending line rather than
as a stack trace.