Node.js API Compatibility

Status of Node.js built-in module support in howth.

Legend: Full = all common APIs work | Partial = key APIs work, some missing | Stub = exists for import compat, limited function | Missing = not present

Core Modules

Module	Status	Notes
assert	Full	strict mode, deep equality, rejects/doesNotReject
async_hooks	Partial	AsyncLocalStorage, AsyncResource
buffer	Full	All encodings, read/write methods, Buffer.alloc/from/concat
child_process	Full	exec, spawn, execFile, fork (file-based IPC)
cluster	Missing
console	Full	log/warn/error/debug, time/timeEnd, table, group
constants	Full	Legacy constants (deprecated)
crypto	Partial	Hash, HMAC, random, createCipheriv/createDecipheriv (AES-CBC/CTR/GCM), sign/verify (RSA), publicEncrypt/privateDecrypt (RSA-OAEP), generateKeyPairSync (RSA). Missing: scrypt, createDiffieHellman, X509, createECDH
dgram	Missing	UDP sockets
diagnostics_channel	Stub	Channel class exists, no real functionality
dns	Stub	Returns placeholder 127.0.0.1 results
domain	Full	Deprecated module, implemented for compat
events	Full	EventEmitter with full API
fs	Full	Sync, callback, and fs.promises. createReadStream/createWriteStream, watch
http	Full	Native Hyper/Tokio server, client with Agent
http2	Missing
https	Partial	request/get work, createServer is basic stub
inspector	Stub	Session class, no real debugging
module	Full	createRequire, builtinModules, CommonJS loader
net	Partial	Socket, Server, connect, createServer. Missing advanced options
os	Full	cpus, homedir, networkInterfaces, constants, etc.
path	Full	POSIX and Win32 variants
perf_hooks	Partial	performance.now/mark/measure, PerformanceObserver
process	Full	Global. env, argv, cwd, exit, stdin/stdout/stderr, nextTick, hrtime
punycode	Full	Deprecated module, implemented for compat
querystring	Full	parse, stringify, escape, unescape
readline	Missing
repl	Missing
stream	Full	Readable, Writable, Duplex, Transform, PassThrough, pipeline, finished, promises
stream/web	Full	ReadableStream, WritableStream, TransformStream
string_decoder	Full	Multi-byte character handling
timers	Full	setTimeout/setInterval/setImmediate + timers/promises
tls	Stub	TLSSocket exists but no real TLS negotiation
trace_events	Missing
tty	Partial	isatty, ReadStream, WriteStream
url	Full	Legacy url.parse + WHATWG URL/URLSearchParams, pathToFileURL/fileURLToPath
util	Full	format, inspect, promisify, callbackify, types.*, TextEncoder/TextDecoder
v8	Partial	getHeapStatistics, serialize/deserialize
vm	Partial	Script, createContext, runInContext/NewContext/ThisContext, compileFunction
wasi	Missing
worker_threads	Partial	Worker, MessageChannel/MessagePort, isMainThread. Missing SharedArrayBuffer transfer
zlib	Full	gzip/gunzip/deflate/inflate sync + async + streaming

Web APIs (Globals)

API	Status	Notes
fetch	Full	Via reqwest backend
Request / Response / Headers	Full
URL / URLSearchParams	Full
TextEncoder / TextDecoder	Full
AbortController / AbortSignal	Full
Blob / File / FormData	Full
crypto.subtle	Partial	digest works. Missing encrypt/decrypt/sign/verify/generateKey/importKey/exportKey
structuredClone	Partial	JSON-based, no transferable support
Event / EventTarget	Full
ReadableStream / WritableStream / TransformStream	Full
performance.now()	Full
atob / btoa	Full
queueMicrotask	Full
setTimeout / setInterval	Full

Known Gaps Causing Real-World Failures

Gap	Affected Packages	Priority
crypto.createCipheriv / createDecipheriv	cookie-signature, express-session, passport	High Done
crypto.sign / verify	jsonwebtoken, google-auth-library	High Done
crypto.publicEncrypt / privateDecrypt	google-auth-library, node-jose	High Done
dns.resolve (real resolution)	got, axios (for SRV lookups)	Medium
tls.connect (real TLS)	database drivers, custom HTTPS	Medium
net advanced options	database drivers, socket.io	Medium
http2	gRPC, modern HTTP clients	Medium
cluster	PM2, production deployments	Low
readline	interactive CLI tools	Low
dgram	DNS servers, game servers	Low

Totals

• Full: 22 modules
• Partial: 9 modules
• Stub: 3 modules
• Missing: 6 modules
• Overall: 34 / 40 modules present (85%)