Smart Illustrator
axtonliu/smart-illustrator
Generates article illustrations, batch slide infographics and cover images from your text, using Gemini, Mermaid or Excalidraw engines and a prompt-only mode.
YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization.
Install Youtube Thumbnail Design
$ npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace youtube-thumbnail-design --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/101-skills/youtube-thumbnail-design .claude/skills/youtube-thumbnail-design && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "youtube-thumbnail-design" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/101-skills/youtube-thumbnail-design into .claude/skills/youtube-thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "youtube-thumbnail-design", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/aiskillstore/marketplace/tree/main/skills/101-skills/youtube-thumbnail-designType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace youtube-thumbnail-design --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/101-skills/youtube-thumbnail-design .agents/skills/youtube-thumbnail-design && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "youtube-thumbnail-design" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/101-skills/youtube-thumbnail-design into .agents/skills/youtube-thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "youtube-thumbnail-design", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace youtube-thumbnail-design --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/101-skills/youtube-thumbnail-design .cursor/skills/youtube-thumbnail-design && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "youtube-thumbnail-design" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/101-skills/youtube-thumbnail-design into .cursor/skills/youtube-thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "youtube-thumbnail-design", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/aiskillstore/marketplace.git --path skills/101-skills/youtube-thumbnail-design--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace youtube-thumbnail-design --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/101-skills/youtube-thumbnail-design .gemini/skills/youtube-thumbnail-design && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "youtube-thumbnail-design" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/101-skills/youtube-thumbnail-design into .gemini/skills/youtube-thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "youtube-thumbnail-design", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install aiskillstore/marketplace youtube-thumbnail-designInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/101-skills/youtube-thumbnail-design .github/skills/youtube-thumbnail-design && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "youtube-thumbnail-design" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/101-skills/youtube-thumbnail-design into .github/skills/youtube-thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "youtube-thumbnail-design", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace youtube-thumbnail-design --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/101-skills/youtube-thumbnail-design .opencode/skills/youtube-thumbnail-design && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "youtube-thumbnail-design" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/101-skills/youtube-thumbnail-design into .opencode/skills/youtube-thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "youtube-thumbnail-design", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
youtube-thumbnail-design- GitHub stars
- 433
- Used in
- 1 other repo
- Token cost
- ~2.3k tokens
- SKILL.md length
- 639 words
- Files
- 2
- Skills in repo
- 1,044
- Repo updated
- First seen
- Licence
- None found
At a glance
YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization.
- Works in 3 steps: The mood/emotion (from colors and… → The general subject (from composition) → The text (if any — only if large enough)
- : YouTube thumbnails
- SKILL.md covers Quick Start, Specifications, The 120px Test and Safe Zones, plus 8 more sections
- Calls npx
What it does
Youtube Thumbnail Design is an agent 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
Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `skill-report.json`).
It sits in Media & Creative, covering Social media graphics and A/B testing. It works with YouTube. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- : YouTube thumbnails
- Video cover images
- Click-through optimization
Example prompts
- “/youtube-thumbnail-design”
Requirements
- Node.js
- Pre-approved tools (allowed-tools): Bash(belt *)
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- The mood/emotion (from colors and expression)
- The general subject (from composition)
- The text (if any — only if large enough)
What it can do on your machine
Read from SKILL.md and the folder at commit 44923f3. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
Bash(belt *)
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
npx
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
inference.shraw.githubusercontent.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Youtube Thumbnail Design loads about 2.3k tokens when it runs. Until then it costs about 122 tokens; SKILL.md has 639 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 639 words (~2,326 tokens).
“Create high-CTR YouTube thumbnails with AI image generation via inference.sh CLI.”
- name
- youtube-thumbnail-design
- allowed-tools
- Bash(belt *)
Files
SKILL.md and 1 other file in skills/101-skills/youtube-thumbnail-design of aiskillstore/marketplace.
- SKILL.md
- skill-report.json
Open the folder on GitHubat commit 44923f3
Used in 1 other repository
We found 9 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Youtube Thumbnail Design next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Youtube Thumbnail Design this skillaiskillstore/marketplace | 433 | 1 repos | ~2.3k | Automated safety check: Pass | None | |
| Smart Illustratoraxtonliu/smart-illustrator | 564 | — | ~1.8k | Automated safety check: Pass | MIT | |
| Generate Youtube Thumbnailkrusemediallc/arcads-claude-code | 1.6k | — | ~2.4k | Automated safety check: Notes | MIT | |
| Picture Itgeongeorge/picture-it | 132 | — | ~3.7k | Automated safety check: Pass | MIT | |
| Youtube Thumbnailhassancs91/claude-youtube-editor | 328 | — | ~2.1k | Automated safety check: Notes | MIT | |
| Typography Cover Designersugarforever/01coder-agent-skills | 137 | — | ~3.3k | Automated safety check: Pass | MIT |
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Related
Works with
Categories
Questions about Youtube Thumbnail Design
What does Youtube Thumbnail Design do?
YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization. Youtube Thumbnail Design is an agent skill from aiskillstore/marketplace. YouTube thumbnail design with specific dimensions, contrast rules, and mobile preview optimization.
When should I use Youtube Thumbnail Design?
Youtube Thumbnail Design fits situations like: : YouTube thumbnails; video cover images; click-through optimization.
How do I install Youtube Thumbnail Design in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a claude-code`. Or copy the skill folder (skills/101-skills/youtube-thumbnail-design in aiskillstore/marketplace) into .claude/skills/youtube-thumbnail-design in your project. Claude Code loads it when a task matches its description.
How do I install Youtube Thumbnail Design in Codex?
Run `npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a codex`. Or copy the skill folder (skills/101-skills/youtube-thumbnail-design in aiskillstore/marketplace) into .agents/skills/youtube-thumbnail-design in your project. Codex loads it when a task matches its description.
Can I use Youtube Thumbnail Design in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aiskillstore/marketplace --skill youtube-thumbnail-design -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/youtube-thumbnail-design, .gemini/skills/youtube-thumbnail-design, .github/skills/youtube-thumbnail-design and .opencode/skills/youtube-thumbnail-design in your project.
What does Youtube Thumbnail Design need to run?
Going by SKILL.md and its folder, Youtube Thumbnail Design needs the command-line tools its instructions call (npx). Our summary lists: Node.js. Its frontmatter pre-approves these tools: Bash(belt *).
Does Youtube Thumbnail Design access the network?
SKILL.md names 2 domains. As links in the text: inference.sh and raw.githubusercontent.com. This is read from the text; nothing was executed.
Is Youtube Thumbnail Design safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Youtube Thumbnail Design use?
No licence was found for Youtube Thumbnail Design or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Youtube Thumbnail Design use?
About 2.3k tokens (SKILL.md is roughly 9.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Youtube Thumbnail Design?
Skills that share tags, products or a category with Youtube Thumbnail Design: Smart Illustrator (axtonliu/smart-illustrator, 564 stars), Generate Youtube Thumbnail (krusemediallc/arcads-claude-code, 1.6k stars), Picture It (geongeorge/picture-it, 132 stars) and Youtube Thumbnail (hassancs91/claude-youtube-editor, 328 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Youtube Thumbnail Design?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 433 GitHub stars. The repository holds 1,044 skills in this directory. The repository was last updated on October 10, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.