aiskillstore/marketplace · skills/101-skills/youtube-thumbnail-design/SKILL.md

youtube-thumbnail-design skillA

youtube-thumbnail-design is agent-read markdown (skill) from aiskillstore/marketplace: YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization. Covers safe zones, text placement, face expression psychology, and A/B testing. Use for: YouTube thumbnails, video cover images, click-through optimization. Triggers: youtube thumbnail, thumbnail design, video thumbnail, click through rate, ctr optimization, youtube cover, video cover image, thumbnail maker, thumbnail tips, youtube design, video preview image.

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 aiskillstore/marketplace/youtube-thumbnail-design@git:20260710.e1c4d84
Exact content
mdr add aiskillstore/marketplace/youtube-thumbnail-design@sha256:e7e42243da58435a

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_c3o5plxb2azg5cxe.svg)](https://markdownregistry.com/a/art_c3o5plxb2azg5cxe)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260710.e1c4d84 latest2026-07-10 e1c4d84 9,639 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 (9639 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

aiskillstore/marketplace · 427 stars · license none · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_c3o5plxb2azg5cxe
GET https://markdownregistry.com/api/v1/resolve?ref=aiskillstore/marketplace/youtube-thumbnail-design
GET https://markdownregistry.com/api/v1/blob/e7e42243da58435a7d5b465b9ca9f2cf94d5ad06cbc0cbd76dab017aef8b7bfd

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