Agent skill

React Mosaic

by nomcopter in nomcopter/react-mosaic

Build tiling window manager layouts in React with react-mosaic-component (v7) - resizable, drag-and-drop rearrangeable panels, splits and tab groups.

Custom licenceAuto-check passedDevelopment

Install React Mosaic

skills CLI
$ npx skills add nomcopter/react-mosaic --skill react-mosaic -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install nomcopter/react-mosaic react-mosaic --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/nomcopter/react-mosaic.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/react-mosaic .claude/skills/react-mosaic && rm -rf skills-src

Use ~/.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/

Facts

Skill name
react-mosaic
GitHub stars
4.8k
Token cost
~2.5k tokens
SKILL.md length
768 words
Files
1
Skills in repo
6
Repo updated
First seen
Licence
Custom licence

At a glance

Build tiling window manager layouts in React with react-mosaic-component (v7) - resizable, drag-and-drop rearrangeable panels, splits and tab groups.

  • Changing code that imports react-mosaic-component
  • SKILL.md covers Setup, Minimal example, The tree and Controlled vs uncontrolled, plus 6 more sections
  • Calls npm
  • Uses Mosaic / MosaicWindow / MosaicNode

What it does

React Mosaic is an agent skill from nomcopter/react-mosaic. Build tiling window manager layouts in React with react-mosaic-component (v7) - resizable, drag-and-drop rearrangeable panels, splits and tab groups. Use when writing or changing code that imports react-mosaic-component, uses Mosaic / MosaicWindow / MosaicNode, or when asked for an IDE-like, dockable, resizable or tiled panel layout in React.

Its SKILL.md is about 2.5k 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 Development. It works with React and TypeScript. The repository describes itself as: A React tiling window manager.

When your agent uses it

  • Changing code that imports react-mosaic-component
  • Uses Mosaic / MosaicWindow / MosaicNode
  • Asked for an IDE-like
  • Tiled panel layout in React

Example prompts

  • “/react-mosaic”

Requirements

  • Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit a189cd9. 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

    Shell commands in SKILL.md call:

    • npm

    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):

    • nomcopter.github.io

    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

React Mosaic loads about 2.5k tokens when it runs. Until then it costs about 89 tokens; SKILL.md has 768 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~89
When it runs · the whole SKILL.md, loaded when a task matches
~2.5k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 768 words (~2,540 tokens).

“A React tiling window manager (React 16-19, TypeScript). The layout is an immutable n-ary tree of panels. Full docs: https://nomcopter.github.io/react-mosaic/”

— opening of SKILL.md by nomcopter, Custom licence
name
react-mosaic

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/react-mosaic of nomcopter/react-mosaic.

Open the folder on GitHubat commit a189cd9

Compare with similar skills

React Mosaic 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.

React Mosaic compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
React Mosaic this skillnomcopter/react-mosaic4.8k—~2.5kAutomated safety check: PassCustom licence
OpenTUI Terminal Interfacescline/cline70k—~1.9kAutomated safety check: PassApache-2.0
Generate Release Notesteambit/bit18k—~2.2kAutomated safety check: PassCustom licence
Wagmi Feature Developmentwevm/wagmi6.8k—~3.8kAutomated safety check: PassMIT
Pnpm Engineteambit/bit18k—~1.9kAutomated safety check: PassCustom licence
Evolutionary Modular Architecturetech-leads-club/agent-skills7k—~3.7kAutomated safety check: PassCC-BY-4.0

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Works with

Categories

Questions about React Mosaic

What does React Mosaic do?

Build tiling window manager layouts in React with react-mosaic-component (v7) - resizable, drag-and-drop rearrangeable panels, splits and tab groups. React Mosaic is an agent skill from nomcopter/react-mosaic. Build tiling window manager layouts in React with react-mosaic-component (v7) - resizable, drag-and-drop rearrangeable panels, splits and tab groups.

When should I use React Mosaic?

React Mosaic fits situations like: changing code that imports react-mosaic-component; uses Mosaic / MosaicWindow / MosaicNode; asked for an IDE-like; tiled panel layout in React.

How do I install React Mosaic in Claude Code?

Run `npx skills add nomcopter/react-mosaic --skill react-mosaic -a claude-code`. Or copy the skill folder (skills/react-mosaic in nomcopter/react-mosaic) into .claude/skills/react-mosaic in your project. Claude Code loads it when a task matches its description.

How do I install React Mosaic in Codex?

Run `npx skills add nomcopter/react-mosaic --skill react-mosaic -a codex`. Or copy the skill folder (skills/react-mosaic in nomcopter/react-mosaic) into .agents/skills/react-mosaic in your project. Codex loads it when a task matches its description.

Can I use React Mosaic 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 nomcopter/react-mosaic --skill react-mosaic -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/react-mosaic, .gemini/skills/react-mosaic, .github/skills/react-mosaic and .opencode/skills/react-mosaic in your project.

What does React Mosaic need to run?

Going by SKILL.md and its folder, React Mosaic needs the command-line tools its instructions call (npm). Our summary lists: Node.js.

Does React Mosaic access the network?

SKILL.md names 1 domain. As links in the text: nomcopter.github.io. This is read from the text; nothing was executed.

Is React Mosaic 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 React Mosaic use?

React Mosaic has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does React Mosaic use?

About 2.5k tokens (SKILL.md is roughly 10k 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 React Mosaic?

Skills that share tags, products or a category with React Mosaic: OpenTUI Terminal Interfaces (cline/cline, 70k stars), Generate Release Notes (teambit/bit, 18k stars), Wagmi Feature Development (wevm/wagmi, 6.8k stars) and Pnpm Engine (teambit/bit, 18k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains React Mosaic?

nomcopter (a GitHub user) maintains it in nomcopter/react-mosaic, which has 4,800 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on September 28, 2026.

Source: nomcopter/react-mosaic on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.