This file is byte-identical to the first copy the registry indexed, one of 6 indexed copies. Same content hash, so the same checks give both the same grade.
template-skill from sethgammon/citadel is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
Replace with description of the skill and when Claude should use it.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
The line at the top of this page pins the label git:20260711.59dbe65, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
B 16 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
fail: Size between 200 bytes and 200 KB (140 bytes)
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
GitHub
sethgammon/citadel · 929 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rqcjio6zehojk4dn
GET https://markdownregistry.com/api/v1/resolve?ref=sethgammon/citadel/template-skill
GET https://markdownregistry.com/api/v1/blob/eb685d91de039ed864fbd790cddf31684b017fd4a34ee1a55760d8d7cdbadefa
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
sethgammon/citadel · skills/architect/SKILL.md · Given a PRD, produces an implementation architecture: file tree, component breakdown, data model, and a phased build…
sethgammon/citadel · skills/archon/SKILL.md · Autonomous multi-session campaign agent. Decomposes large work into phases, delegates to sub-agents, reviews output…
sethgammon/citadel · skills/create-app/SKILL.md · End-to-end app creation from a single description. Five tiers: blank project, guided, templated, fully generated, or…
sethgammon/citadel · skills/create-skill/SKILL.md · Creates new skills from the user's repeating patterns. Interview-driven: discovers the task, analyzes failure modes…
gptme/gptme-contrib · skills/template-skill/SKILL.md · Template for creating new skills in gptme-contrib. Use this as a starting point when creating your own skills.
