bun-websocket-server SKILL.md skillA
bun-websocket-server from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add secondsky/claude-skills/bun-websocket-server@v1.0.0Pins 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-websocket-server/SKILL.md- Versions recorded
- 3
- Latest version
- v1.0.0, committed Apr 2, 2026
- First version recorded
- Dec 29, 2025
- Size
- 7,236 bytes
- Repository stars
- 247
- License
- MIT
This skill should be used when the user asks about "WebSocket in Bun", "real-time communication", "Bun.serve websocket", "ws server", "socket connections", "pub/sub", "broadcasting messages", "WebSocket upgrade", or building real-time applications with Bun.
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 WebSocket Server
Bun has built-in WebSocket support integrated with `Bun.serve()`.
## Quick Start
```typescript
const server = Bun.serve({
fetch(req, server) {
// Upgrade to WebSocket
if (server.upgrade(req)) {
return; // Upgraded successfully
}
return new Response("Not a WebSocket request", { status: 400 });
},
websocket: {
open(ws) {
console.log("Client connected");
},
message(ws, message) {
console.log("Received:", message);
ws.send(`Echo: ${message}`);
},
close(ws) {
console.log("Client disconnected");
},
},
});
console.log(`WebSocket server running on ws://localhost:${server.port}`);
```
## WebSocket Handlers
```typescript
Bun.serve({
fetch(req, server) {
server.upgrade(req);
},
websocket: {
// Client connected
open(ws) {
console.log("New connection");
},
// Message received
message(ws, message) {
// message is string | Buffer
if (typeof message === "string") {
console.log("Text:", message);
} else {
console.log("Binary:", message);
}
},
// Connection closed
close(ws, code, reason) {
…Read the whole file at its exact version.
How to install
mdr add secondsky/claude-skills/bun-websocket-server@sha256:f1f0c627ecd3759bThe 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.
[](https://markdownregistry.com/a/art_f365p5zumqwgftd6)
5 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 | 7,236 B | A | view · diff |
| v1.0.0 | 2026-04-02 | 89c5e89 | 7,223 B | A | view · diff |
| v1.0.0 | 2025-12-29 | 2cbc8ed | 7,209 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7236 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
secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f365p5zumqwgftd6 GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/bun-websocket-server GET https://markdownregistry.com/api/v1/blob/f1f0c627ecd3759b9f8c54344abc209b51ea101f29917a96df51c2ef395bc0f1
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.