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Agent skill

Composer Plugins

by dxos in dxos/dxos

A skill your agent uses when working on files in packages/plugins/, adding new plugins, refactoring plugin components/containers, writing storybooks for plugins, or wiring capabilities like…

Custom licenceAuto-check passedFrontend & Design

Install Composer Plugins

skills CLI
$ npx skills add dxos/dxos --skill composer-plugins -a claude-code

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

GitHub CLI
$ gh skill install dxos/dxos composer-plugins --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/dxos/dxos.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/composer-plugins .claude/skills/composer-plugins && 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
composer-plugins
GitHub stars
525
Token cost
~13k tokens
SKILL.md length
5,162 words
Files
2
Skills in repo
41
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when working on files in packages/plugins/, adding new plugins, refactoring plugin components/containers, writing storybooks for plugins, or wiring capabilities like…

  • Works in 3 steps: list_plugins({ id: 'space' }) → the… → find_symbol({ query: 'SpaceOperation' })… → get_symbol({ ref:…
  • Working on files in packages/plugins/
  • SKILL.md covers Discovery, Specification, Workflow and Creating a New Plugin, plus 6 more sections
  • Calls pnpm and gh

What it does

Composer Plugins is an agent skill from dxos/dxos. Use when working on files in packages/plugins/, adding new plugins, refactoring plugin components/containers, writing storybooks for plugins, or wiring capabilities like react-surface or operation-resolver. For the UI/design-system details of plugin components (layout, theming, forms, toolbars, lists, storybook), pair this with the composer-ui skill.

Its SKILL.md is about 13k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `MEMORY.md`).

It sits in Frontend & Design, covering UI design, Theming and dark mode and GraphQL. It works with Storybook, React and Model Context Protocol. The repository describes itself as: TypeScript implementation of the DXOS protocols, SDK, toolchain and Composer.

When your agent uses it

  • Working on files in packages/plugins/
  • Adding new plugins
  • Refactoring plugin components/containers
  • Writing storybooks for plugins

Example prompts

  • “/composer-plugins”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. list_plugins({ id: 'space' }) → the exact plugin id, when you only have a loose name.
  2. find_symbol({ query: 'SpaceOperation' }) → @dxos/plugin-space#SpaceOperation.
  3. get_symbol({ ref: '@dxos/plugin-space#SpaceOperation', include: ['source'] }) → every

What it can do on your machine

Read from SKILL.md and the folder at commit f0fc12a. 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:

    • pnpm
    • gh

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use pnpm and gh, which can reach the network depending on how they are called.

    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

Composer Plugins loads about 13k tokens when it runs. Until then it costs about 92 tokens; SKILL.md has 5,162 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~92
When it runs · the whole SKILL.md, loaded when a task matches
~13k

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 5,162 words (~12,958 tokens).

“Exemplar: packages/plugins/plugin-chess. Read its source files to understand every pattern below.”

— opening of SKILL.md by dxos, Custom licence
name
composer-plugins

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in .agents/skills/composer-plugins of dxos/dxos.

  • SKILL.md
  • MEMORY.md

Open the folder on GitHubat commit f0fc12a

Compare with similar skills

Composer Plugins 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.

Composer Plugins compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Composer Plugins this skilldxos/dxos525—~13kAutomated safety check: PassCustom licence
UI UX Pro Maxsaoudi-h/solar-icons18418 repos~11kAutomated safety check: NotesCustom licence
Tidyfactor StylerTidyFactor/Styler118—~1.7kAutomated safety check: PassApache-2.0
Wonder BlocksKhan/wonder-blocks163—~3.2kAutomated safety check: PassMIT
Golemuigolemui/golemui113—~2.2kAutomated safety check: PassMIT
UI Design Systemtry-works/role-model118—~5kAutomated safety check: PassMIT

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Works with

Categories

Questions about Composer Plugins

What does Composer Plugins do?

A skill your agent uses when working on files in packages/plugins/, adding new plugins, refactoring plugin components/containers, writing storybooks for plugins, or wiring capabilities like…. Composer Plugins is an agent skill from dxos/dxos. Use when working on files in packages/plugins/, adding new plugins, refactoring plugin components/containers, writing storybooks for plugins, or wiring capabilities like react-surface or operation-resolver.

When should I use Composer Plugins?

Composer Plugins fits situations like: working on files in packages/plugins/; adding new plugins; refactoring plugin components/containers; writing storybooks for plugins.

How do I install Composer Plugins in Claude Code?

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

How do I install Composer Plugins in Codex?

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

Can I use Composer Plugins 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 dxos/dxos --skill composer-plugins -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/composer-plugins, .gemini/skills/composer-plugins, .github/skills/composer-plugins and .opencode/skills/composer-plugins in your project.

What does Composer Plugins need to run?

Going by SKILL.md and its folder, Composer Plugins needs the command-line tools its instructions call (pnpm and gh).

Does Composer Plugins access the network?

SKILL.md contains no URLs. Its commands use gh, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Composer Plugins 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 Composer Plugins use?

Composer Plugins 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 Composer Plugins use?

About 13k tokens (SKILL.md is roughly 52k 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 Composer Plugins?

Skills that share tags, products or a category with Composer Plugins: UI UX Pro Max (saoudi-h/solar-icons, 184 stars), Tidyfactor Styler (TidyFactor/Styler, 118 stars), Wonder Blocks (Khan/wonder-blocks, 163 stars) and Golemui (golemui/golemui, 113 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Composer Plugins?

dxos (a GitHub organization) maintains it in dxos/dxos, which has 525 GitHub stars. The repository holds 41 skills in this directory. The repository was last updated on October 8, 2026.

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