bun-runtime
Bun as runtime, package manager, bundler, and test runner. When to choose Bun vs Node, migration notes, and Vercel support.
npx skills add mturac/everything-openai-codex --skill bun-runtime --agent codex
Same command for any agent — swap --agent for claude-code, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Bun Runtime Bun is a fast all-in-one JavaScript runtime and toolkit: runtime, package manager, bundler, and test runner. ## When to Use - **Prefer Bun** for: new JS/TS projects, scripts where install/run speed matters, Vercel deployments with Bun runtime, and when you want a single toolchain (run + install + test + build). - **Prefer Node** for: maximum ecosystem compatibility, legacy tooling that assumes Node, or when a dependency has known Bun issues. Use when: adopting Bun, migrating from Node, writing or debugging Bun scripts/tests, or configuring Bun on Vercel or other platforms. ## How It Works - **Runtime**: Drop-in Node-compatible runtime (built on JavaScriptCore, implemented in Zig). - **Package manager**: `bun install` is significantly faster than npm/yarn. Lockfile is `bun.lock` (text) by default in current Bun; older versions used `bun.lockb` (binary). - **Bundler**: Built-in bundler and transpiler for apps and libraries. - **Test runner**: Built-in `bun test` with Jest-like API. **Migration from Node**: Replace `node script.js` with `bun run script.js` or `bun script.js`. Run `bun install` in place of `npm install`; most packages work. Use `bun run` for npm scripts;
- When to Use
- How It Works
- Examples
- Run and install
- Scripts and env
- Testing
- Runtime API
- Best Practices
Install dependencies (creates/updates bun.lock or bun.lockb) bun install Run a script or file bun run dev bun run src/index.ts bun src/index.ts bun run --env-file=.env dev bun test bun test --watch
What does the bun-runtime skill do?
Bun as runtime, package manager, bundler, and test runner. When to choose Bun vs Node, migration notes, and Vercel support.
How do I install it?
Run `npx skills add mturac/everything-openai-codex --skill bun-runtime --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From mturac/everything-openai-codex, a repository with 84 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.