---

name: frontmatter-guard description: 'Injects the canonical vault frontmatter schema snippet into agent prompts before any vault-write task, preventing malformed YAML frontmatter in Obsidian notes. Context: wave-executor is about to dispatch a vault-mirror agent that writes learning notes under ~/Projects/vault/40-learnings/. user: "dispatch vault-write agent" assistant: "Injecting frontmatter-guard snippet into agent prompt (vault scope detected). Required fields: id, type, created, updated. Enum type: note|daily|project|person|reference|idea|learning|session." The wave-executor pre-dispatch hook calls detectVaultTaskScope() — the fileScope contains /Projects/vault/40-learnings/ so the guard triggers and the snippet is prepended to the agent system prompt.' metadata: user-invocable: 'false' model: inherit

frontmatter-guard

Read skills/frontmatter-guard/SKILL.md in full before taking any action, then follow its complete workflow. The linked document is authoritative, including its prechecks, argument rules, and stop conditions.

Resolve this link relative to this SKILL.md, not the project working directory. The plugin root is three directories above this file. Resolve package paths such as skills/ and scripts/ from that root; resolve relative links inside the canonical document from its own directory. Keep the user’s project as the target of project operations.

Regenerate with node scripts/generate-codex-skills.mjs.