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anthropics/skills
Builds multi-component claude.ai HTML artifacts as a small React, TypeScript and Tailwind project, then bundles it into one shareable HTML file.
Apply the Law of Common Region — a shared container, background, or border groups elements regardless of spacing.
Install Law Of Common Region
$ npx skills add Owl-Listener/designer-skills --skill law-of-common-region -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Owl-Listener/designer-skills law-of-common-region --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/Owl-Listener/designer-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/ui-design/skills/law-of-common-region .claude/skills/law-of-common-region && 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 "law-of-common-region" agent skill from https://github.com/Owl-Listener/designer-skills/tree/main/ui-design/skills/law-of-common-region into .claude/skills/law-of-common-region/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "law-of-common-region", 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/Owl-Listener/designer-skills/tree/main/ui-design/skills/law-of-common-regionType 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 Owl-Listener/designer-skills --skill law-of-common-region -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Owl-Listener/designer-skills law-of-common-region --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Owl-Listener/designer-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/ui-design/skills/law-of-common-region .agents/skills/law-of-common-region && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "law-of-common-region" agent skill from https://github.com/Owl-Listener/designer-skills/tree/main/ui-design/skills/law-of-common-region into .agents/skills/law-of-common-region/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "law-of-common-region", 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 Owl-Listener/designer-skills --skill law-of-common-region -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Owl-Listener/designer-skills law-of-common-region --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Owl-Listener/designer-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/ui-design/skills/law-of-common-region .cursor/skills/law-of-common-region && 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 "law-of-common-region" agent skill from https://github.com/Owl-Listener/designer-skills/tree/main/ui-design/skills/law-of-common-region into .cursor/skills/law-of-common-region/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "law-of-common-region", 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/Owl-Listener/designer-skills.git --path ui-design/skills/law-of-common-region--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 Owl-Listener/designer-skills --skill law-of-common-region -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Owl-Listener/designer-skills law-of-common-region --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Owl-Listener/designer-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/ui-design/skills/law-of-common-region .gemini/skills/law-of-common-region && 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 "law-of-common-region" agent skill from https://github.com/Owl-Listener/designer-skills/tree/main/ui-design/skills/law-of-common-region into .gemini/skills/law-of-common-region/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "law-of-common-region", 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 Owl-Listener/designer-skills law-of-common-regionInstalls 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 Owl-Listener/designer-skills --skill law-of-common-region -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Owl-Listener/designer-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/ui-design/skills/law-of-common-region .github/skills/law-of-common-region && 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 "law-of-common-region" agent skill from https://github.com/Owl-Listener/designer-skills/tree/main/ui-design/skills/law-of-common-region into .github/skills/law-of-common-region/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "law-of-common-region", 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 Owl-Listener/designer-skills --skill law-of-common-region -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Owl-Listener/designer-skills law-of-common-region --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Owl-Listener/designer-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/ui-design/skills/law-of-common-region .opencode/skills/law-of-common-region && 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 "law-of-common-region" agent skill from https://github.com/Owl-Listener/designer-skills/tree/main/ui-design/skills/law-of-common-region into .opencode/skills/law-of-common-region/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "law-of-common-region", 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
law-of-common-region- GitHub stars
- 2.9k
- Used in
- 1 other repo
- Token cost
- ~744 tokens
- SKILL.md length
- 388 words
- Files
- 1
- Skills in repo
- 107
- Repo updated
- First seen
- Licence
- MIT
At a glance
Apply the Law of Common Region — a shared container, background, or border groups elements regardless of spacing.
- Grouping must survive a tight layout
- SKILL.md covers What You Do, The Principle, Common Region vs Proximity and Applications, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Law Of Common Region is an agent skill from Owl-Listener/designer-skills. Apply the Law of Common Region — a shared container, background, or border groups elements regardless of spacing. Use when grouping must survive a tight layout. For grouping by spacing alone, use law-of-proximity.
Its SKILL.md is about 740 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Frontend & Design. The repository describes itself as: Designer Skills Collection: agentic skills, commands, and plugins for design — from research to systems, UI, interaction, and delivery. The licence is MIT.
When your agent uses it
- Grouping must survive a tight layout
Example prompts
- “/law-of-common-region”
What it can do on your machine
Read from SKILL.md and the folder at commit 9a6930c. 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.
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
Law Of Common Region loads about 744 tokens when it runs. Until then it costs about 59 tokens; SKILL.md has 388 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 Owl-Listener/designer-skills at commit 9a6930c, republished under its MIT licence (© Owl-Listener). 388 words, ~744 tokens.
Download SKILL.mdSave it as
.claude/skills/law-of-common-region/SKILL.md (or your agent's skills folder).- name
- law-of-common-region
- description
- Apply the Law of Common Region — a shared container, background, or border groups elements regardless of spacing. Use when grouping must survive a tight layout. For grouping by spacing alone, use `law-of-proximity`.
Law of Common Region
You are an expert in Gestalt visual organization and containment-based grouping.
What You Do
You apply the Law of Common Region to create clear groupings using visual boundaries — backgrounds, borders, cards, and surfaces — so users understand which elements belong together.
The Principle
Elements enclosed within a shared boundary or placed on a shared background are perceived as a group, even when they are not especially close together. Containment is one of the strongest grouping signals available:
- A card with a background creates an unambiguous group
- A colored section background ties disparate content into a unit
- A panel border tells users that everything inside belongs together
Common Region vs Proximity
Both signal grouping; they work differently:
| Law of Proximity | Law of Common Region | |
|---|---|---|
| Mechanism | Spatial closeness | Shared boundary or background |
| Best for | Related items already close | Items that need a stronger or explicit boundary |
| Overhead | Zero — just spacing | Visual weight — a border or background is present |
| When to prefer | Most layout grouping | Cards, panels, sidebars, tabbed sections, modals |
| Use proximity first; add common region when proximity alone is insufficient or when the grouping boundary needs to be explicit (e.g. a card that can be acted on as a unit, a form section within a larger form). |
Show full SKILL.md (179 more words)Show less
Applications
| Pattern | Common Region Role |
|---|---|
| Cards | Container clearly delimits a discrete item |
| Sidebar | Background or border separates navigation from content |
| Modal / sheet | Surface elevation signals an isolated task context |
| Form sections | Background or rule divides logical groups within a long form |
| Table rows | Hover/selection background shows a row as a unit |
| Tag groups | Pill background makes each tag a discrete object |
| Tooltip | Container boundary distinguishes overlay from page content |
When Containment Is Counterproductive
- Using cards for everything flattens hierarchy — not every group needs a container
- Nested common regions create visual noise; limit nesting depth to two levels
- A border for its own sake adds clutter; if proximity already communicates the grouping, the border is redundant
Best Practices
- Give containers consistent corner radius, padding, and shadow within a design system
- Use the weakest container that gets the job done — background before border, border before card surface
- Ensure common regions survive in low-contrast or dark mode contexts
- Don't combine proximity and common region redundantly on the same grouping unless you are establishing hierarchy (a card inside a panel section, for example)
© Owl-Listener, 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 ui-design/skills/law-of-common-region of Owl-Listener/designer-skills.
Open the folder on GitHubat commit 9a6930c
Used in 1 other repository
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in Owl-Listener/designer-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Law Of Common Region 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 |
|---|---|---|---|---|---|---|
| Law Of Common Region this skillOwl-Listener/designer-skills | 2.9k | 1 repos | ~744 | Automated safety check: Pass | MIT | |
| Web Artifacts Builderanthropics/skills | 180k | 40 repos | ~769 | Automated safety check: Pass | Apache-2.0 | |
| React Doctormakeplane/plane | 61k | 12 repos | ~657 | Automated safety check: Pass | AGPL-3.0 | |
| Impeccablebestofjs/bestofjs | 3.1k | 26 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Figma Design System Builderwarpdotdev/warp | 65k | 2 repos | ~4.4k | Automated safety check: Pass | AGPL-3.0 | |
| Web Interface Guidelines Reviewervercel-labs/openreview | 1.7k | 97 repos | ~308 | Automated safety check: Pass | None |
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Related
Categories
Questions about Law Of Common Region
What does Law Of Common Region do?
Apply the Law of Common Region — a shared container, background, or border groups elements regardless of spacing. Law Of Common Region is an agent skill from Owl-Listener/designer-skills. Apply the Law of Common Region — a shared container, background, or border groups elements regardless of spacing.
When should I use Law Of Common Region?
Law Of Common Region fits situations like: grouping must survive a tight layout.
How do I install Law Of Common Region in Claude Code?
Run `npx skills add Owl-Listener/designer-skills --skill law-of-common-region -a claude-code`. Or copy the skill folder (ui-design/skills/law-of-common-region in Owl-Listener/designer-skills) into .claude/skills/law-of-common-region in your project. Claude Code loads it when a task matches its description.
How do I install Law Of Common Region in Codex?
Run `npx skills add Owl-Listener/designer-skills --skill law-of-common-region -a codex`. Or copy the skill folder (ui-design/skills/law-of-common-region in Owl-Listener/designer-skills) into .agents/skills/law-of-common-region in your project. Codex loads it when a task matches its description.
Can I use Law Of Common Region 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 Owl-Listener/designer-skills --skill law-of-common-region -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/law-of-common-region, .gemini/skills/law-of-common-region, .github/skills/law-of-common-region and .opencode/skills/law-of-common-region in your project.
What does Law Of Common Region need to run?
SKILL.md names no scripts, command-line tools or credentials: Law Of Common Region is instructions for the agent only.
Does Law Of Common Region 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 Law Of Common Region 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 Law Of Common Region use?
Law Of Common Region 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 Law Of Common Region use?
About 744 tokens (SKILL.md is roughly 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 Law Of Common Region?
Skills that share tags, products or a category with Law Of Common Region: Web Artifacts Builder (anthropics/skills, 180k stars), React Doctor (makeplane/plane, 61k stars), Impeccable (bestofjs/bestofjs, 3.1k stars) and Figma Design System Builder (warpdotdev/warp, 65k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Law Of Common Region?
Owl-Listener (a GitHub user) maintains it in Owl-Listener/designer-skills, which has 2,871 GitHub stars. The repository holds 107 skills in this directory. The repository was last updated on September 5, 2026.
Source: Owl-Listener/designer-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.