charlie947/social-media-skills · skills/youtube-thumbnail/SKILL.md

youtube-thumbnail skillA

youtube-thumbnail is agent-read markdown (skill) from charlie947/social-media-skills: Generate a branded YouTube thumbnail from a video title. Uses a reference photo of the creator, high-CTR thumbnail principles, and brand colours to produce a ready-to-generate image prompt for Gemini. Use this skill whenever the user says "thumbnail", "youtube thumbnail", "build me a thumbnail", or wants a video cover image before writing the script. The thumbnail-first workflow mirrors the graphic-first approach for LinkedIn: sells the video before anyone hears a word of the script..

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 charlie947/social-media-skills/youtube-thumbnail@git:20260915.0c3b055
Exact content
mdr add charlie947/social-media-skills/youtube-thumbnail@sha256:b57a1412b3aa9207

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_ah66tbipfzhv2wal.svg)](https://markdownregistry.com/a/art_ah66tbipfzhv2wal)

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Versions

versioncommittedcommitsizeaudit
git:20260915.0c3b055 latest2026-09-15 0c3b055 7,727 BA view · diff
git:20260915.8cbf92a2026-09-15 8cbf92a 7,547 BA view · diff
git:20260422.ce848602026-04-22 ce84860 5,181 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 (7727 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

charlie947/social-media-skills · 3,480 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ah66tbipfzhv2wal
GET https://markdownregistry.com/api/v1/resolve?ref=charlie947/social-media-skills/youtube-thumbnail
GET https://markdownregistry.com/api/v1/blob/b57a1412b3aa9207330dc5059ae13140434a4ab0a13d1e0c1a0c1d38abbad038