coalesce-labs/catalyst · .agents/skills/catalyst-meta-validate-frontmatter/SKILL.md

validate-frontmatter skillA

validate-frontmatter is agent-read markdown (skill) from coalesce-labs/catalyst: Validates YAML frontmatter on plugins/*/skills/*/SKILL.md and plugins/*/agents/*.md against docs/frontmatter-standard.md and .claude/rules/plugin-editing.md: required fields, the disable-model-invocation/user-invocable polarity, allowed-tools vs tools, and skill-only fields that must not leak (model, category). Use when adding or editing a skill or agent, before opening a PR that touches plugins/**, or paired with audit-references to confirm a plugin cleanup's frontmatter didn't drift..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add coalesce-labs/catalyst/validate-frontmatter@git:20260826.e9b5dac
Exact content
mdr add coalesce-labs/catalyst/validate-frontmatter@sha256:6c6f9a579bf7556a

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_mkkonprchmagq2w4.svg)](https://markdownregistry.com/a/art_mkkonprchmagq2w4)

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Versions

versioncommittedcommitsizeaudit
git:20260826.e9b5dac latest2026-08-26 e9b5dac 2,740 BA view · diff
git:20260824.3b803572026-08-24 3b80357 15,785 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (2740 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

coalesce-labs/catalyst · 20 stars · license none · pushed 2026-09-16 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_mkkonprchmagq2w4
GET https://markdownregistry.com/api/v1/resolve?ref=coalesce-labs/catalyst/validate-frontmatter
GET https://markdownregistry.com/api/v1/blob/6c6f9a579bf7556a78525b853e9bee8a8561fa465f921140f0be4607972e7bc6

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.