youtube-thumbnails SKILL.md skillA
youtube-thumbnails from swyxio/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add swyxio/skills/youtube-thumbnails@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- swyxio/skills
- Path
youtube-thumbnails/SKILL.md- Versions recorded
- 2
- Latest version
- v0.1.0, committed Oct 1, 2026
- First version recorded
- Apr 8, 2026
- Size
- 6,432 bytes
- Repository stars
- 194
- License
- MIT
This skill should be used when the user asks to "create YouTube thumbnails", "generate thumbnails", "make video thumbnails", or needs AI-generated thumbnail images via Google Gemini for YouTube videos. Covers prompt engineering, image generation, compression, and upload to YouTube Studio.
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 Generation via Gemini ## Overview Generate custom YouTube thumbnails using Google Gemini's image generation (Pro mode). Each thumbnail is a 1280x720 image with bold text overlays, thematic visuals, and branding. ## Step-by-Step Workflow ### 1. Gather Video Info For each video that needs a thumbnail, collect: - **Title** (already set on YouTube) - **Content type**: "AI in Action" weekly jam or "Paper Club" reading - **Topic summary**: What was presented/demoed (from frame extraction or title) - **Presenter name** (optional, for subtitle text) - **Date** in `D Mon YYYY` format ### 2. Navigate to Gemini - Go to `gemini.google.com` - Click **Tools** button (bottom toolbar) - Enable **Create images** - Click the model dropdown (shows "Fast" by default) and select **Pro** - Confirm "Image" chip and "Pro" label appear in the chat input area ### 3. Craft the Thumbnail Prompt Use this prompt template, customized per video: ``` Create a YouTube thumbnail (1280x720) for a video titled "[FULL TITLE]". [1-2 sentences describing what the video is about — the demo, paper, or topic]. …
Read the whole file at its exact version.
How to install
mdr add swyxio/skills/youtube-thumbnails@sha256:03c60a035a3d42f3The line at the top of this page pins the label v0.1.0, 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_7rpm5emuvxncwvzp)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Apr 8, 2026 and Oct 1, 2026, about one every 176 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.0 latest | 2026-10-01 | 7a57f05 | 6,432 B | A | view · diff |
| v0.1.0 | 2026-04-08 | e0355eb | 6,418 B | A | view |
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 (6432 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
swyxio/skills · 194 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7rpm5emuvxncwvzp GET https://markdownregistry.com/api/v1/resolve?ref=swyxio/skills/youtube-thumbnails GET https://markdownregistry.com/api/v1/blob/03c60a035a3d42f3fca58c616a90d8e9313a6aad83503ceea8a2d5824041bc34
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.