Add an NPM Package Dependency

Important constraints

• Golem TypeScript runs inside a QuickJS WebAssembly runtime, NOT Node.js.
• The runtime implements a broad set of Browser and Node.js APIs. Most packages targeting browsers or standard Node.js APIs will work.
• Packages that use native Node.js C++ addons will not work (no native compilation in WASM).
• node:child_process supports constrained JavaScript and simple npm script execution inside the runtime. It cannot create host processes or run a general shell. node:cluster, node:http2, and node:worker_threads remain unsupported or stubbed.

Supported runtime APIs

• Web Platform APIs: fetch, Headers, Request, Response, FormData, Blob, File, URL, URLSearchParams, console, timers, AbortController, TextEncoder/TextDecoder, Streams (ReadableStream, WritableStream, TransformStream), structuredClone, crypto.randomUUID/crypto.getRandomValues, Event/EventTarget, MessageChannel/MessagePort, Intl
• Node.js modules: node:buffer, node:crypto (hashes, HMAC, ciphers, key generation, sign/verify, DH, ECDH, X509), node:dgram (UDP), node:dns, node:events, node:fs and node:fs/promises (comprehensive filesystem), node:http/node:https (client and server), node:net (TCP sockets and servers), node:os, node:path, node:perf_hooks, node:process, node:querystring, node:readline, node:sqlite (embedded, requires feature flag), node:stream, node:test, node:timers, node:url, node:util, node:v8, node:vm, node:zlib (gzip, deflate, brotli)

Check the wasm-rquickjs README for the up-to-date list.

Steps

1. Install the package

   From the project root (where package.json is):

   npm install <package-name>
   

   For dev-only dependencies (build tools, type definitions):

   npm install --save-dev <package-name>
   

2. Build to verify

   golem build --yes
   

   Do NOT run npx rollup or npx tsc directly — always use golem build.

3. If the build or runtime fails

   • Build error: the package may use TypeScript features or module formats incompatible with the Rollup bundling pipeline. Check if the package has an ESM or browser build.
   • Runtime error (X is not defined): the package depends on a Node.js or browser API not available in the QuickJS runtime. Look for an alternative package.

Already available packages

These are already in the project's package.json — do NOT add them again:

• @golemcloud/golem-ts-sdk — Golem agent framework (defineAgent / method, Standard Schema markers, durability, transactions, RPC)
• rollup with @rollup/plugin-* plugins (dev) — bundling pipeline
• typescript and tslib (dev) — TypeScript compiler and runtime helpers
• @types/node (dev) — Node type definitions

The agent contract is described with a Standard Schema library. zod is used by the default template; valibot, arktype, and effect schemas are also supported — add whichever one your agents use if it is not already present.

HTTP requests

Use the built-in fetch API — it is available globally.

AI / LLM features

Use any third party AI/LLM library from npmjs.com, but it has to only depend on the supported runtime APIs.