bun-hot-reloading SKILL.md skillB

bun-hot-reloading 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-hot-reloading@v1.0.0

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

Audit grade
B, 16 of 17 checks passed
Kind
SKILL.md skill
Repository
secondsky/claude-skills
Path
plugins/bun/skills/bun-hot-reloading/SKILL.md
Versions recorded
4
Latest version
v1.0.0, committed Aug 3, 2026
First version recorded
Dec 29, 2025
Size
7,643 bytes
Repository stars
247
License
MIT

Use when implementing hot reloading with Bun (--hot, --watch), HMR, or automatic code reloading during development. Covers watch mode, hot mode, and HTTP server reload.

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 Hot Reloading

Bun provides built-in hot reloading for faster development cycles.

## Watch Mode vs Hot Mode

| Feature | `--watch` | `--hot` |
|---------|-----------|---------|
| Behavior | Restart process | Reload modules |
| State | Lost on reload | Preserved |
| Speed | ~20ms restart | Instant reload |
| Use case | Any file type | Bun.serve HTTP |

## Watch Mode (--watch)

Restarts the entire process when files change.

```bash
# Basic watch mode
bun --watch run src/index.ts

# Watch specific script
bun --watch run dev

# Watch with test runner
bun --watch test
```

### package.json Scripts

```json
{
  "scripts": {
    "dev": "bun --watch run src/index.ts",
    "dev:server": "bun --watch run src/server.ts",
    "test:watch": "bun --watch test"
  }
}
```

### Watch Behavior

- Watches imported files automatically
- Triggers on any `.ts`, `.tsx`, `.js`, `.jsx` change
- Also watches `.json` imports
- Restarts with fresh state

## Hot Mode (--hot)

Reloads modules in-place without restarting the process.

```bash
bun --hot run src/server.ts
```

### HTTP Server Hot Reload

```typescript
// src/server.ts
let counter = 0; // State preserved across hot reloads
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add secondsky/claude-skills/bun-hot-reloading@sha256:296352f51396829a

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 badge

[![mdr](https://markdownregistry.com/badge/art_j7qkb4hsqzrrojmi.svg)](https://markdownregistry.com/a/art_j7qkb4hsqzrrojmi)

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

Versions

The registry has recorded 4 versions of this file, between Dec 29, 2025 and Aug 3, 2026, about one every 73 days.

versioncommittedcommitsizeaudit
v1.0.0 latest2026-08-03 bbf808c 7,643 BB view · diff
v1.0.02026-04-02 75421fa 7,487 BB view · diff
v1.0.02026-04-02 89c5e89 7,474 BB view · diff
v1.0.02025-12-29 2cbc8ed 7,460 BB view

Audit of the latest version

B  16 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (7643 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

Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.

Source

GitHub

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

API

GET https://markdownregistry.com/api/v1/artifacts/art_j7qkb4hsqzrrojmi
GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/bun-hot-reloading
GET https://markdownregistry.com/api/v1/blob/296352f51396829aa8c3af260fa8e916e5e7e016ba9c4681f14728ad73a5bf91

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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