Bun
galfrevn/apollo
A skill your agent uses when building, running, testing, or bundling JavaScript/TypeScript applications.
Quick reference for using Bun to run TypeScript and JavaScript, install packages, bundle code, run tests and serve HTTP, with the key files and commands.
Install Bun Runtime and Toolkit
$ npx skills add mweinbach/agent-coworker --skill bun -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mweinbach/agent-coworker bun --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/mweinbach/agent-coworker.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/bun .claude/skills/bun && 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 "bun" agent skill from https://github.com/mweinbach/agent-coworker/tree/main/.agents/skills/bun into .claude/skills/bun/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun", 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/mweinbach/agent-coworker/tree/main/.agents/skills/bunType 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 mweinbach/agent-coworker --skill bun -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mweinbach/agent-coworker bun --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mweinbach/agent-coworker.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/bun .agents/skills/bun && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "bun" agent skill from https://github.com/mweinbach/agent-coworker/tree/main/.agents/skills/bun into .agents/skills/bun/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun", 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 mweinbach/agent-coworker --skill bun -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mweinbach/agent-coworker bun --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mweinbach/agent-coworker.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/bun .cursor/skills/bun && 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 "bun" agent skill from https://github.com/mweinbach/agent-coworker/tree/main/.agents/skills/bun into .cursor/skills/bun/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun", 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/mweinbach/agent-coworker.git --path .agents/skills/bun--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 mweinbach/agent-coworker --skill bun -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mweinbach/agent-coworker bun --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mweinbach/agent-coworker.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/bun .gemini/skills/bun && 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 "bun" agent skill from https://github.com/mweinbach/agent-coworker/tree/main/.agents/skills/bun into .gemini/skills/bun/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun", 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 mweinbach/agent-coworker bunInstalls 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 mweinbach/agent-coworker --skill bun -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mweinbach/agent-coworker.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/bun .github/skills/bun && 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 "bun" agent skill from https://github.com/mweinbach/agent-coworker/tree/main/.agents/skills/bun into .github/skills/bun/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun", 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 mweinbach/agent-coworker --skill bun -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mweinbach/agent-coworker bun --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mweinbach/agent-coworker.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/bun .opencode/skills/bun && 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 "bun" agent skill from https://github.com/mweinbach/agent-coworker/tree/main/.agents/skills/bun into .opencode/skills/bun/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun", 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
bun- GitHub stars
- 156
- Token cost
- ~2.2k tokens
- SKILL.md length
- 960 words
- Files
- 1
- Skills in repo
- 8
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Quick reference for using Bun to run TypeScript and JavaScript, install packages, bundle code, run tests and serve HTTP, with the key files and commands.
- Works in 7 steps: Set up a new project → Install dependencies → Write and run code → …
- Running a TypeScript or JSX file directly without a build step
- SKILL.md covers Product summary, When to use, Quick reference and Decision guidance, plus 4 more sections
- Calls bun
What it does
Bun is a single `bun` executable that acts as runtime, package manager, bundler and test runner, and it runs TypeScript and JSX directly without configuration. The skill lists the commands that cover most tasks: `bun run` for files and package scripts, `bun install`, `bun add` and `bun remove` for dependencies, `bun build` with an output folder for bundles, `bun test`, and `--watch` for reruns.
It also covers file conventions: optional `bunfig.toml` for configuration, `package.json`, the `bun.lock` lockfile, test files named `*.test.ts` or `*.spec.ts` that are found automatically, and `.env` files that load on their own. A bunfig example shows install settings such as hoisted or isolated linking. A table of common APIs begins with `Bun.serve()` for HTTP servers, and the use cases include file operations, monorepo workspaces and preparing production builds.
When your agent uses it
- Running a TypeScript or JSX file directly without a build step
- Adding, removing or updating npm packages with Bun
- Bundling an app for the browser or a server
- Writing and running Jest-style tests
- Setting up a workspace with several packages
Example prompts
- “Run index.ts with Bun and set up a dev script in package.json.”
- “Add lodash and the Node types as a dev dependency using bun.”
- “Bundle src/main.ts into ./dist with bun build.”
- “Start a small HTTP server using Bun.serve and write a test for its route.”
Requirements
- Bun installed on your machine
Workflow steps
7 steps, taken from the step headings in SKILL.md.
- Set up a new project
- Install dependencies
- Write and run code
- Add packages
- Build for production
- Run tests
- Configure (optional)
What it can do on your machine
Read from SKILL.md and the folder at commit aab9dc6. 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:
bun
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):
bun.com
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
Bun Runtime and Toolkit loads about 2.2k tokens when it runs. Until then it costs about 56 tokens; SKILL.md has 960 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteMentions a .env fileSKILL.md:51
- `.env`, `.env.local`, `.env.production` — Environment variables (auto-loaded) - NoteMentions a .env fileSKILL.md:136
ges, creates `bun.lock`. Bun auto-loads `.env` files. - NoteMentions a .env fileSKILL.md:177
Environment variables**: Bun auto-loads `.env`, `.env.local`, `.env.production`, `.env.development`. Disable with `env = - NoteMentions a .env fileSKILL.md:194
guration is available; do not create an `.env` file unless the task requires one
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 960 words (~2,220 tokens).
“Bun is an all-in-one JavaScript/TypeScript runtime and toolkit. It ships as a single executable (bun) and includes a fast runtime (4x faster startup than Node.js), package manager (30x faster installs), bundler, and test runner. Agents use Bun to execute TypeScript/JSX…”
- name
- bun
- metadata.mintlify-proj
- bun
- metadata.version
- 1.0
Files
Just SKILL.md in .agents/skills/bun of mweinbach/agent-coworker.
Open the folder on GitHubat commit aab9dc6
Compare with similar skills
Bun Runtime and Toolkit 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 |
|---|---|---|---|---|---|---|
| Bun Runtime and Toolkit this skillmweinbach/agent-coworker | 156 | — | ~2.2k | Automated safety check: Notes | Custom licence | |
| Bungalfrevn/apollo | 237 | — | ~2k | Automated safety check: Notes | MIT | |
| Bunbastani-inc/atomic | 855 | — | ~2.8k | Automated safety check: Pass | Custom licence | |
| Linea Dependency MaintenanceConsensys-Incorporated/linea-attestation-registry | 177 | 1 repos | ~3.7k | Automated safety check: Warn | MIT | |
| Monorepo Tooling and Dependenciespierrecomputer/pierre | 6.3k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Migrate to Denodenoland/skills | 100 | — | ~2.2k | Automated safety check: Warn | MIT |
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bastani-inc/atomic
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Linea Dependency Maintenance
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Safely plan and execute dependency maintenance for JavaScript/TypeScript (npm, pnpm) and GitHub Actions, including npm lockfiles, pnpm workspaces, catalogs, overrides, SHA-pinned action versions…
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pierrecomputer/pierre
Sets one monorepo's rules for toolchain pins, pnpm package operations, the shared dependency catalog and moon tasks, so the agent adds versions and scripts the right way.
- Official
Migrate to Deno
denoland/skills
Moves a Node.js, npm, Yarn, pnpm or Bun project to Deno in reversible steps, starting with Deno as the package manager and changing no code unless needed.
npm Supply Chain Security
bodadotsh/npm-security-best-practices
Applies safer package manager defaults and dependency vetting to JavaScript and TypeScript projects to reduce supply-chain attack risk.
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Related
Works with
Categories
Questions about Bun Runtime and Toolkit
What does Bun Runtime and Toolkit do?
Quick reference for using Bun to run TypeScript and JavaScript, install packages, bundle code, run tests and serve HTTP, with the key files and commands. Bun is a single `bun` executable that acts as runtime, package manager, bundler and test runner, and it runs TypeScript and JSX directly without configuration. The skill lists the commands that cover most tasks: `bun run` for files and package scripts, `bun install`, `bun add` and `bun remove` for dependencies, `bun build` with an output folder for bundles, `bun test`, and `--watch` for reruns.
When should I use Bun Runtime and Toolkit?
Bun Runtime and Toolkit fits situations like: running a TypeScript or JSX file directly without a build step; adding, removing or updating npm packages with Bun; bundling an app for the browser or a server; writing and running Jest-style tests.
How do I install Bun Runtime and Toolkit in Claude Code?
Run `npx skills add mweinbach/agent-coworker --skill bun -a claude-code`. Or copy the skill folder (.agents/skills/bun in mweinbach/agent-coworker) into .claude/skills/bun in your project. Claude Code loads it when a task matches its description.
How do I install Bun Runtime and Toolkit in Codex?
Run `npx skills add mweinbach/agent-coworker --skill bun -a codex`. Or copy the skill folder (.agents/skills/bun in mweinbach/agent-coworker) into .agents/skills/bun in your project. Codex loads it when a task matches its description.
Can I use Bun Runtime and Toolkit 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 mweinbach/agent-coworker --skill bun -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/bun, .gemini/skills/bun, .github/skills/bun and .opencode/skills/bun in your project.
What does Bun Runtime and Toolkit need to run?
Going by SKILL.md and its folder, Bun Runtime and Toolkit needs the command-line tools its instructions call (bun). Our summary lists: Bun installed on your machine.
Does Bun Runtime and Toolkit access the network?
SKILL.md names 1 domain. As links in the text: bun.com. This is read from the text; nothing was executed.
Is Bun Runtime and Toolkit safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Bun Runtime and Toolkit use?
Bun Runtime and Toolkit 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 Bun Runtime and Toolkit use?
About 2.2k tokens (SKILL.md is roughly 8.9k 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 Bun Runtime and Toolkit?
Skills that share tags, products or a category with Bun Runtime and Toolkit: Bun (galfrevn/apollo, 237 stars), Bun (bastani-inc/atomic, 855 stars), Linea Dependency Maintenance (Consensys-Incorporated/linea-attestation-registry, 177 stars) and Monorepo Tooling and Dependencies (pierrecomputer/pierre, 6.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Bun Runtime and Toolkit?
mweinbach (a GitHub user) maintains it in mweinbach/agent-coworker, which has 156 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 9, 2026.
Source: mweinbach/agent-coworker on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.