CLAUDE.md@public/files/bun/src/js claudeA
CLAUDE.md@public/files/bun/src/js is agent-read markdown (claude) from modem-dev/ossrules.
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What the file says
# JavaScript Builtins in Bun
Write JS builtins for Bun's Node.js compatibility and APIs. Run `bun bd` after changes.
## Directory Structure
- `builtins/` - Individual functions (`*CodeGenerator(vm)` in C++)
- `node/` - Node.js modules (`node:fs`, `node:path`)
- `bun/` - Bun modules (`bun:ffi`, `bun:sqlite`)
- `thirdparty/` - NPM replacements (`ws`, `node-fetch`)
- `internal/` - Internal modules
## Writing Modules
Modules are NOT ES modules:
```typescript
const EventEmitter = require("node:events"); // String literals only
const { validateFunction } = require("internal/validators");
export default {
myFunction() {
if (!$isCallable(callback)) {
throw $ERR_INVALID_ARG_TYPE("cb", "function", callback);
}
},
};
```
## Writing Builtin Functions
```typescript
// Fifo.ts
export function createFIFO<T>(): Dequeue<T> {
const Dequeue = require("internal/fifo");
return new Dequeue();
}
```
C++ access:
```cpp
object->putDirectBuiltinFunction(vm, globalObject, identifier,
fifoCreateFIFOCodeGenerator(vm), 0);
```
## $ Globals and Special Syntax
**CRITICAL**: Use `.$call` and `.$apply`, never `.call` or `.apply`:
```typescript
// ✗ WRONG - User can tamper
…Read the whole file at its exact version.
How to install
mdr add modem-dev/ossrules/public/files/bun/src/js/CLAUDE.md@git:20260915.977fcedmdr add modem-dev/ossrules/public/files/bun/src/js/CLAUDE.md@sha256:396b545d5afa7a73Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
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Versions
Audit of the latest version
- pass: Size between 200 bytes and 200 KB (2606 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
modem-dev/ossrules · 52 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xudfi36qqjmhzjud GET https://markdownregistry.com/api/v1/resolve?ref=modem-dev/ossrules/public/files/bun/src/js/CLAUDE.md GET https://markdownregistry.com/api/v1/blob/396b545d5afa7a73b6a613caaef196c596c8d473e245fa0806cc7c1432b432d5
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