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bun-runtime SKILL.md skillA

bun-runtime from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add secondsky/claude-skills/bun-runtime@v1.0.0

Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: secondsky/claude-skills
Path: plugins/bun/skills/bun-runtime/SKILL.md
Versions recorded: 3
Latest version: v1.0.0, committed Apr 2, 2026
First version recorded: Dec 29, 2025
Size: 4,152 bytes
Repository stars: 247
License: MIT

Use for Bun runtime, bunfig.toml, watch/hot modes, env vars, CLI flags, and module resolution.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Bun Runtime

Bun is a fast all-in-one JavaScript runtime built on JavaScriptCore (Safari's engine). It provides 4x faster startup than Node.js on Linux.

## Quick Start

```bash
# Run a file
bun run index.ts
bun index.ts  # shorthand

# Run with watch mode
bun --watch run index.ts

# Run package.json script
bun run dev

# Run with hot reloading
bun --hot run server.ts
```

## Core CLI Flags

| Flag | Purpose |
|------|---------|
| `--watch` | Restart on file changes |
| `--hot` | Hot module replacement (preserves state) |
| `--smol` | Reduce memory usage (slower GC) |
| `--inspect` | Enable debugger |
| `--preload` | Load modules before execution |
| `--env-file` | Load specific .env file |
| `-e, --eval` | Evaluate code string |

## Running Files

Bun transpiles TypeScript and JSX on-the-fly:

```bash
bun run index.js
bun run index.ts
bun run index.jsx
bun run index.tsx
```

**Important**: Put Bun flags immediately after `bun`:
```bash
bun --watch run dev    # Correct
bun run dev --watch    # Wrong - flag passed to script
```

## Package.json Scripts

```bash
# Run script
bun run dev
bun dev  # shorthand (if no Bun command conflicts)

# List available scripts
bun run
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add secondsky/claude-skills/bun-runtime@sha256:7bbdb5037e6fa99f

The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_qpc7lgynrcfw2w3h.svg)](https://markdownregistry.com/a/art_qpc7lgynrcfw2w3h)

6 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Dec 29, 2025 and Apr 2, 2026, about one every 47 days.

version	committed	commit	size	audit
v1.0.0 latest	2026-04-02	75421fa	4,152 B	A	view · diff
v1.0.0	2026-04-02	89c5e89	4,139 B	A	view · diff
v1.0.0	2025-12-29	2cbc8ed	4,125 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (4152 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qpc7lgynrcfw2w3h
GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/bun-runtime
GET https://markdownregistry.com/api/v1/blob/7bbdb5037e6fa99f3df6d9d6b1fafff8474794ff18a266e951e90373920bcb93

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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