coalesce-labs/catalyst · plugins/meta/skills/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@v1.0.0
Exact content
mdr add coalesce-labs/catalyst/validate-frontmatter@sha256:97df8ef077e2abd0

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_d3u4meazxvuj3el7.svg)](https://markdownregistry.com/a/art_d3u4meazxvuj3el7)

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Versions

versioncommittedcommitsizeaudit
v1.0.0 latest2026-08-26 e9b5dac 2,824 BA view · diff
v1.0.02026-08-26 5f4fa48 15,867 BA view · diff
v1.0.02026-06-25 c996d95 15,868 BA view · diff
v1.0.02026-06-24 42ffc53 15,313 BA view · diff
v1.0.02026-04-29 870e84e 15,483 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 (2824 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_d3u4meazxvuj3el7
GET https://markdownregistry.com/api/v1/resolve?ref=coalesce-labs/catalyst/validate-frontmatter
GET https://markdownregistry.com/api/v1/blob/97df8ef077e2abd081d65fa9b6d8bcbca334256f080fdc314b7f4b3a636fa121

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