Agent skill

Composable Mini Apps

by BuilderIO in BuilderIO/agent-native

Build many focused workspace apps that compose through agent discovery and A2A.

No licenceAuto-check passed

Install Composable Mini Apps

skills CLI
$ npx skills add BuilderIO/agent-native --skill composable-mini-apps -a claude-code

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

GitHub CLI
$ gh skill install BuilderIO/agent-native composable-mini-apps --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/BuilderIO/agent-native.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/composable-mini-apps .claude/skills/composable-mini-apps && 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
composable-mini-apps
GitHub stars
7.1k
Token cost
~1.8k tokens
SKILL.md length
946 words
Files
1
Skills in repo
102
Repo updated
First seen
Licence
None found

At a glance

Build many focused workspace apps that compose through agent discovery and A2A.

  • Designing headless mini-apps
  • SKILL.md covers Rule, Shape, Discovery And Invocation and Artifact Handoff, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Cross-app workflows

What it does

Composable Mini Apps is an agent skill from BuilderIO/agent-native. Build many focused workspace apps that compose through agent discovery and A2A. Use when designing headless mini-apps or cross-app workflows.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: A framework for building agentic apps.

When your agent uses it

  • Designing headless mini-apps
  • Cross-app workflows

Example prompts

  • “/composable-mini-apps”

What it can do on your machine

Read from SKILL.md and the folder at commit be0d784. 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

Composable Mini Apps loads about 1.8k tokens when it runs. Until then it costs about 41 tokens; SKILL.md has 946 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~41
When it runs · the whole SKILL.md, loaded when a task matches
~1.8k

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 946 words (~1,774 tokens).

“Prefer many one-job apps in a workspace over one oversized app. A headless app can own a provider, dataset, workflow, or specialist action surface without a full UI; the main agent composes those apps through discovery and A2A.”

— opening of SKILL.md by BuilderIO
name
composable-mini-apps
scope
dev

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/composable-mini-apps of BuilderIO/agent-native.

Open the folder on GitHubat commit be0d784

Compare with similar skills

Composable Mini Apps 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.

Composable Mini Apps compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Composable Mini Apps this skillBuilderIO/agent-native7.1k—~1.8kAutomated safety check: PassNone
Compose Focus Navigationchrisbanes/skills1.1k—~994Automated safety check: PassApache-2.0
Daily Focus Boardgithub/awesome-copilot40k—~3kAutomated safety check: PassMIT
Focus Stylesthedaviddias/Front-End-Checklist74k—~639Automated safety check: PassMIT
Focus Orderthedaviddias/Front-End-Checklist74k—~519Automated safety check: PassMIT
Focus Managementthedaviddias/Front-End-Checklist74k—~465Automated safety check: PassMIT

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Questions about Composable Mini Apps

What does Composable Mini Apps do?

Build many focused workspace apps that compose through agent discovery and A2A. Composable Mini Apps is an agent skill from BuilderIO/agent-native. Build many focused workspace apps that compose through agent discovery and A2A.

When should I use Composable Mini Apps?

Composable Mini Apps fits situations like: designing headless mini-apps; cross-app workflows.

How do I install Composable Mini Apps in Claude Code?

Run `npx skills add BuilderIO/agent-native --skill composable-mini-apps -a claude-code`. Or copy the skill folder (.agents/skills/composable-mini-apps in BuilderIO/agent-native) into .claude/skills/composable-mini-apps in your project. Claude Code loads it when a task matches its description.

How do I install Composable Mini Apps in Codex?

Run `npx skills add BuilderIO/agent-native --skill composable-mini-apps -a codex`. Or copy the skill folder (.agents/skills/composable-mini-apps in BuilderIO/agent-native) into .agents/skills/composable-mini-apps in your project. Codex loads it when a task matches its description.

Can I use Composable Mini Apps 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 BuilderIO/agent-native --skill composable-mini-apps -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/composable-mini-apps, .gemini/skills/composable-mini-apps, .github/skills/composable-mini-apps and .opencode/skills/composable-mini-apps in your project.

What does Composable Mini Apps need to run?

SKILL.md names no scripts, command-line tools or credentials: Composable Mini Apps is instructions for the agent only.

Does Composable Mini Apps 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 Composable Mini Apps 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 Composable Mini Apps use?

No licence was found for Composable Mini Apps or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Composable Mini Apps use?

About 1.8k tokens (SKILL.md is roughly 7.1k 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 Composable Mini Apps?

Skills that share tags, products or a category with Composable Mini Apps: Compose Focus Navigation (chrisbanes/skills, 1.1k stars), Daily Focus Board (github/awesome-copilot, 40k stars), Focus Styles (thedaviddias/Front-End-Checklist, 74k stars) and Focus Order (thedaviddias/Front-End-Checklist, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Composable Mini Apps?

BuilderIO (a GitHub organization) maintains it in BuilderIO/agent-native, which has 7,103 GitHub stars. The repository holds 102 skills in this directory. The repository was last updated on October 9, 2026.

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