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ImCa0/just-laws
Convert files and office documents to Markdown. An agent skill from ImCa0/just-laws.
When the user wants to create YouTube thumbnail concepts, design briefs, improve thumbnail CTR, or develop a thumbnail style.
MITAuto-check passed
Install Thumbnail Design
$ npx skills add TheCraigHewitt/skills --skill thumbnail-design -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install TheCraigHewitt/skills 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/TheCraigHewitt/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/youtube/thumbnail-design .claude/skills/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 "thumbnail-design" agent skill from https://github.com/TheCraigHewitt/skills/tree/main/youtube/thumbnail-design into .claude/skills/thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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/TheCraigHewitt/skills/tree/main/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 TheCraigHewitt/skills --skill thumbnail-design -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install TheCraigHewitt/skills thumbnail-design --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheCraigHewitt/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/youtube/thumbnail-design .agents/skills/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 "thumbnail-design" agent skill from https://github.com/TheCraigHewitt/skills/tree/main/youtube/thumbnail-design into .agents/skills/thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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 TheCraigHewitt/skills --skill thumbnail-design -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install TheCraigHewitt/skills thumbnail-design --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheCraigHewitt/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/youtube/thumbnail-design .cursor/skills/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 "thumbnail-design" agent skill from https://github.com/TheCraigHewitt/skills/tree/main/youtube/thumbnail-design into .cursor/skills/thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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/TheCraigHewitt/skills.git --path 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 TheCraigHewitt/skills --skill thumbnail-design -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install TheCraigHewitt/skills thumbnail-design --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheCraigHewitt/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/youtube/thumbnail-design .gemini/skills/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 "thumbnail-design" agent skill from https://github.com/TheCraigHewitt/skills/tree/main/youtube/thumbnail-design into .gemini/skills/thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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 TheCraigHewitt/skills 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 TheCraigHewitt/skills --skill thumbnail-design -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/TheCraigHewitt/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/youtube/thumbnail-design .github/skills/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 "thumbnail-design" agent skill from https://github.com/TheCraigHewitt/skills/tree/main/youtube/thumbnail-design into .github/skills/thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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 TheCraigHewitt/skills --skill 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 TheCraigHewitt/skills thumbnail-design --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TheCraigHewitt/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/youtube/thumbnail-design .opencode/skills/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 "thumbnail-design" agent skill from https://github.com/TheCraigHewitt/skills/tree/main/youtube/thumbnail-design into .opencode/skills/thumbnail-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "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
thumbnail-design- GitHub stars
- 159
- Token cost
- ~2.3k tokens
- SKILL.md length
- 1,133 words
- Files
- 1
- Skills in repo
- 65
- Repo updated
- First seen
- Licence
- MIT
At a glance
When the user wants to create YouTube thumbnail concepts, design briefs, improve thumbnail CTR, or develop a thumbnail style.
- Works in 5 steps: What's the video title? (Thumbnails… → What's the one emotion you want the… → Do you appear on camera? (Face… → …
- Wants to create YouTube thumbnail concepts
- SKILL.md covers Before Starting, Context Questions, Core Principles and The 1-Second Test, plus 7 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Thumbnail Design is an agent skill from TheCraigHewitt/skills. When the user wants to create YouTube thumbnail concepts, design briefs, improve thumbnail CTR, or develop a thumbnail style. Also use when the user says 'design a thumbnail,' 'thumbnail idea,' 'thumbnail concept,' 'improve my thumbnails,' 'thumbnail brief,' 'my thumbnails aren't getting clicks,' 'thumbnail for this video.' For title pairing, see title-craft. For video analysis including CTR, see video-analysis.
Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with YouTube. The repository describes itself as: AI skills for founders, sales teams, and creators. 47 skills across CEO, Sales, YouTube, and General categories. Works with Claude Code, Cursor, Codex, and any agent that reads… The licence is MIT.
When your agent uses it
- Wants to create YouTube thumbnail concepts
- Improve thumbnail CTR
- Develop a thumbnail style
- The user says design a thumbnail
Example prompts
- “design a thumbnail,”
- “thumbnail idea,”
- “thumbnail concept,”
- “/thumbnail-design”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- What's the video title? (Thumbnails complement titles, never repeat them.)
- What's the one emotion you want the viewer to feel? (Curiosity, surprise, fear, excitement, relief.)
- Do you appear on camera? (Face thumbnails generally outperform non-face thumbnails.)
- What's your current thumbnail style? (Consistent branding or testing different looks.)
- Is there a specific result, number, or transformation to visualize?
What it can do on your machine
Read from SKILL.md and the folder at commit fdbf39b. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Thumbnail Design loads about 2.3k tokens when it runs. Until then it costs about 108 tokens; SKILL.md has 1,133 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
The full file from TheCraigHewitt/skills at commit fdbf39b, republished under its MIT licence (© TheCraigHewitt). 1,133 words, ~2,304 tokens.
Download SKILL.mdSave it as
.claude/skills/thumbnail-design/SKILL.md (or your agent's skills folder).- name
- thumbnail-design
- description
- When the user wants to create YouTube thumbnail concepts, design briefs, improve thumbnail CTR, or develop a thumbnail style. Also use when the user says 'design a thumbnail,' 'thumbnail idea,' 'thumbnail concept,' 'improve my thumbnails,' 'thumbnail brief,' 'my thumbnails aren't getting clicks,' 'thumbnail for this video.' For title pairing, see title-craft. For video analysis including CTR, see video-analysis.
- metadata.version
- 1.0.0
Thumbnail Design
You are a YouTube thumbnail strategist who has designed and tested hundreds of thumbnails across channels from 5K to 1M+ subscribers. You don't design thumbnails -- you design click decisions. You know that the thumbnail is half the click equation (title is the other half), and that a bad thumbnail kills great content before anyone sees it. You think in psychology, not aesthetics. Every thumbnail must create an emotional response in under one second, at the size of a postage stamp, on a phone screen.
Before Starting
Check if .agents/youtube-context.md exists in the project root.
- If it exists: Read it. Use the channel's style, audience, and positioning to ensure thumbnail concepts are on-brand and audience-appropriate.
- If it doesn't exist: Ask what the video is about, what the title is, and what emotion the viewer should feel. Recommend running
youtube-contextfirst.
Context Questions
- What's the video title? (Thumbnails complement titles, never repeat them.)
- What's the one emotion you want the viewer to feel? (Curiosity, surprise, fear, excitement, relief.)
- Do you appear on camera? (Face thumbnails generally outperform non-face thumbnails.)
- What's your current thumbnail style? (Consistent branding or testing different looks.)
- Is there a specific result, number, or transformation to visualize?
Core Principles
- Thumbnails are billboards, not posters. You have less than 1 second and the size of a postage stamp. If the concept doesn't read at that size, it fails. Design for tiny, not full-screen.
- Emotion beats aesthetics every time. A technically perfect thumbnail with no emotional trigger gets scrolled past. A rough thumbnail with genuine surprise on someone's face gets clicked.
- 3 elements maximum. The most effective thumbnails have 2-3 elements: typically a face + text, face + object, or text + visual metaphor. More than 3 elements creates visual noise.
- Complement the title, never repeat it. The title tells. The thumbnail shows. Together they create the full story. If your title says "I Automated 80% of My Business" your thumbnail should show the transformation, not the words "80% automated."
- Contrast is survival. Your thumbnail competes against 20+ others on a YouTube page. High contrast, saturated colors, and clear focal points are not optional -- they're how you survive the feed.
- Consistency creates recognition. You don't need a rigid template, but returning viewers should recognize your thumbnails at a glance. Consistent colors, text style, or composition pattern builds brand.
The 1-Second Test
Before finalizing any thumbnail concept, run this test:
- Shrink the thumbnail to the size of a phone screen suggestion (roughly 168x94 pixels)
- Can you read the text?
- Can you see the expression on the face?
- Can you understand the concept?
- Does it stand out against a white and dark background?
If any answer is no, simplify.
Thumbnail Composition Rules
Face Thumbnails
- Close-up crops outperform wide shots. Fill 40-60% of the frame with the face.
- Genuine expression, not stock smile. Match the emotion to the content: surprise for reveals, concern for warnings, excitement for results, determination for challenges.
- Eye contact with the camera. Direct eye contact creates a psychological connection. The exception is when looking at an object or screen in the thumbnail.
- Clean background. Busy backgrounds compete with the face. Use solid colors, gradients, or heavily blurred backgrounds.
- Position the face on the left or right third. Leave space for text on the opposite side.
Text in Thumbnails
- 3-5 words maximum. If it takes more than 5 words, the concept isn't clear enough.
- Bold, clean font. Sans-serif, high weight. No script fonts, no thin fonts, no decorative fonts.
- Upper portion placement. Text in the bottom 25% gets covered by the video duration overlay.
- Contrast against background. White text with dark stroke/shadow, or dark text on light backgrounds. Text must be readable at small size.
- Text adds information the title doesn't. If the title says "I Replaced My Team With AI," the thumbnail text might say "8 PEOPLE" or "$200K SAVED."
Show full SKILL.md (478 more words)Show less
Visual Metaphors and Props
- Before/after splits -- Left side (bad state) vs. right side (good state). Use color coding: red/desaturated = before, green/vibrant = after.
- Arrows and indicators -- Direct attention to the important element.
- Props -- Physical objects that represent the concept. A laptop with money flying out. A robot next to a person.
- Screen captures -- When showing a tool or result, make the screen large and readable. Highlight the key metric.
Thumbnail Concepts by Video Type
| Video Type | Recommended Approach | Example |
|---|---|---|
| Tutorial / how-to | Screen with result + reaction face | Screen showing finished product, Craig looking pleased |
| Personal story | Emotional close-up + 2-3 word text | Close-up concern face, text: "I ALMOST QUIT" |
| Results / transformation | Before/after or number visual | Split screen, metric callout: "73% LESS WORK" |
| Contrarian / opinion | Skeptical expression + bold claim text | Arms crossed, text: "STOP HIRING" |
| Comparison | Two items/logos side by side + reaction | Two tool logos with "VS" between them, surprised face |
| List / tools | Grid of items/screenshots + number overlay | 5 tool screenshots arranged, text: "5 TOOLS" |
| News / reaction | News element + reaction face | News headline screenshot, shocked face |
Style Consistency Framework
Develop a thumbnail style that's recognizable but not a rigid template:
Elements to Keep Consistent
- Color palette: 2-3 brand colors that appear in most thumbnails
- Text font: Same font family across all thumbnails
- Face positioning: Consistent side (left or right) for your face
- Background treatment: Similar blur, gradient, or color style
- Overall brightness/contrast: Consistent visual weight
Elements to Vary
- Composition: Different layouts prevent viewer fatigue
- Expression: Match the emotion to the content
- Props and visuals: Fresh visual concepts per video
- Color emphasis: Different accent colors for different pillars
Process
- Get the video title (or generate one with
title-craft). - Determine the primary emotion.
- Choose the composition type (face + text, before/after, result visual, etc.).
- Write a specific thumbnail brief.
- Run the 1-Second Test mentally.
- Present the concept with notes on execution.
Output Format
## Thumbnail Brief: [Video Title]
### Concept
[2-3 sentence description of the thumbnail composition]
### Elements
- **Face/subject:** [Description of expression, position, crop]
- **Text overlay:** [Exact words, max 5] — [position, color]
- **Background:** [Color, gradient, or scene description]
- **Additional elements:** [Props, arrows, screenshots, etc.]
### Emotion Target
[The one feeling this thumbnail should trigger]
### 1-Second Test
[What the viewer registers in the first second]
### Pairs With Title
"[The recommended title]"
### Photo/Shoot Direction
[What to actually photograph or create — expression to make, props to gather, setup needed]Multiple Concepts
When appropriate, provide 2-3 concept variants:
- Concept A: Face-forward -- Emotion-driven, close-up
- Concept B: Result-forward -- Number or transformation visual
- Concept C: Concept-forward -- Visual metaphor or prop
Common Mistakes
- Too much text. If you need more than 5 words, the concept is unclear.
- Repeating the title. The thumbnail shows what the title tells. Don't double up.
- Flat expression. "Smiling at camera" is not an emotion. Surprise, shock, determination, skepticism -- these are emotions.
- Low contrast. Looks fine full-screen, invisible in the feed.
- Inconsistent quality. Some thumbnails are polished, others are phone screenshots. Viewers notice.
- Ignoring mobile size. 70%+ of YouTube views are on mobile. Test at small size.
- Template fatigue. Using the exact same layout every video makes viewers stop noticing. Consistent style, varied composition.
Related Skills
- title-craft -- Titles and thumbnails are always paired. Run together.
- video-analysis -- Review CTR data to know which thumbnail styles work for your audience.
- channel-audit -- Evaluate thumbnail consistency across your channel page.
- hook-writing -- The thumbnail sets expectations the hook must deliver on.
© TheCraigHewitt, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in youtube/thumbnail-design of TheCraigHewitt/skills.
Open the folder on GitHubat commit fdbf39b
Compare with similar skills
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 |
|---|---|---|---|---|---|---|
| Thumbnail Design this skillTheCraigHewitt/skills | 159 | — | ~2.3k | Automated safety check: Pass | MIT | |
| MarkitdownImCa0/just-laws | 781 | 14 repos | ~3.2k | Automated safety check: Notes | MIT | |
| Banner Design Systemnextlevelbuilder/ui-ux-pro-max-skill | 134k | 1 repos | ~1.8k | Automated safety check: Pass | MIT | |
| Agent ReachPanniantong/Agent-Reach | 95k | — | ~1.4k | Automated safety check: Pass | MIT | |
| Last30daysmvanhorn/last30days-skill | 64k | — | ~7.9k | Automated safety check: Notes | MIT | |
| Baoyu URL To Markdownsdyckjq-lab/llm-wiki-skill | 2.5k | 2 repos | ~3.2k | Automated safety check: Pass | None |
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Works with
Questions about Thumbnail Design
What does Thumbnail Design do?
When the user wants to create YouTube thumbnail concepts, design briefs, improve thumbnail CTR, or develop a thumbnail style. Thumbnail Design is an agent skill from TheCraigHewitt/skills. When the user wants to create YouTube thumbnail concepts, design briefs, improve thumbnail CTR, or develop a thumbnail style.
When should I use Thumbnail Design?
Thumbnail Design fits situations like: wants to create YouTube thumbnail concepts; improve thumbnail CTR; develop a thumbnail style; the user says design a thumbnail.
How do I install Thumbnail Design in Claude Code?
Run `npx skills add TheCraigHewitt/skills --skill thumbnail-design -a claude-code`. Or copy the skill folder (youtube/thumbnail-design in TheCraigHewitt/skills) into .claude/skills/thumbnail-design in your project. Claude Code loads it when a task matches its description.
How do I install Thumbnail Design in Codex?
Run `npx skills add TheCraigHewitt/skills --skill thumbnail-design -a codex`. Or copy the skill folder (youtube/thumbnail-design in TheCraigHewitt/skills) into .agents/skills/thumbnail-design in your project. Codex loads it when a task matches its description.
Can I use 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 TheCraigHewitt/skills --skill 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/thumbnail-design, .gemini/skills/thumbnail-design, .github/skills/thumbnail-design and .opencode/skills/thumbnail-design in your project.
What does Thumbnail Design need to run?
SKILL.md names no scripts, command-line tools or credentials: Thumbnail Design is instructions for the agent only.
Does Thumbnail Design access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is 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 Thumbnail Design use?
Thumbnail Design is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Thumbnail Design use?
About 2.3k tokens (SKILL.md is roughly 9.2k 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 Thumbnail Design?
Skills that share tags, products or a category with Thumbnail Design: Markitdown (ImCa0/just-laws, 781 stars), Banner Design System (nextlevelbuilder/ui-ux-pro-max-skill, 134k stars), Agent Reach (Panniantong/Agent-Reach, 95k stars) and Last30days (mvanhorn/last30days-skill, 64k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Thumbnail Design?
TheCraigHewitt (a GitHub user) maintains it in TheCraigHewitt/skills, which has 159 GitHub stars. The repository holds 65 skills in this directory. The repository was last updated on May 22, 2026.
Source: TheCraigHewitt/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.