muapi-youtube-thumbnail SKILL.md skillA
This file is byte-identical to the first copy the registry indexed, one of 4 indexed copies. Same content hash, so the same checks give both the same grade.
muapi-youtube-thumbnail from anil-matcha/generative-media-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add anil-matcha/generative-media-skills/muapi-youtube-thumbnail@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- anil-matcha/generative-media-skills
- Path
.opencode/skills/muapi-youtube-thumbnail/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Sep 29, 2026
- Size
- 3,304 bytes
- Repository stars
- 13
- License
- MIT
Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.
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.
What the file says
# YouTube Thumbnail **Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.** ## Inputs | Name | Type | Required | Default | Description | |:---|:---|:---|:---|:---| | `title` | text | yes | — | The video title or topic (e.g. "I tried 7 AI tools in 24 hours — here's what happened"). | | `channel_style` | text | no | bold, high contrast, bright colors, clean design, YouTube tech aesthetic | Channel brand style (e.g. "dark moody gaming", "bright educational", "minimal corporate"). | | `subject_description` | text | no | — | Optional description of the person or subject to feature (e.g. "a surprised young man in a hoodie"). | ## Steps Thumbnails are the #1 factor in YouTube CTR. Generate a single, maximum-impact 16:9 image. ### Phase A — Plan the composition Before generating, briefly reason about the best thumbnail formula for this topic: - **Emotion-first**: shocked/curious face if relevant + bold text = high CTR - **Text overlay**: 3–5 words max, high-contrast (white/yellow on dark, or vice-versa) - **Contrast & saturation**: thumbnails compete in a grid — they must pop ### Phase B — Generate the thumbnail …
Read the whole file at its exact version.
How to install
mdr add anil-matcha/generative-media-skills/muapi-youtube-thumbnail@sha256:c5a8a08d04c0b989The line at the top of this page pins the label v1.0.0, 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.
[](https://markdownregistry.com/a/art_xe3xazuk7bt4buwx)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 29, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3304 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
anil-matcha/generative-media-skills · 13 stars · license MIT · pushed 2026-09-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xe3xazuk7bt4buwx GET https://markdownregistry.com/api/v1/resolve?ref=anil-matcha/generative-media-skills/muapi-youtube-thumbnail GET https://markdownregistry.com/api/v1/blob/c5a8a08d04c0b989acb0b8e1c0add3a0110dfeaeb0a4ec6acac7f277e88d9586
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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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