Run un-trusted javascript code in a multi-tenant, isolated environment

Isolated Runtime Core

Agent loops that run on Superserve sandboxes — a warm, isolated runtime for loop engineering.

Bun WebSocket server adapter for reform-remote — serves a reform scene's UI over native Bun.serve, one isolated runtime per connection.

The trusted system for work you delegate to AI agents: run any ACP coding agent in an isolated runtime with durable, recoverable, auditable, credential-mediated execution.

Node WebSocket server adapter for reform-remote — serves a reform scene's UI over the `ws` package, one isolated runtime per connection.

Isolated Runtime Test Commons

Secure, isolated expression evaluation runtime for n8n

Access to multiple isolates

Workers Vitest integration for writing Vitest unit and integration tests that run inside the Workers runtime

Isolate content script UI's styles from the parent page. Supports all browsers (Chrome, Firefox, Safari)

Testing utilities for Triggery — isolated runtime, fake scheduler, mock conditions/actions. Zero runtime dependencies, works with Vitest / Jest / node:test.

Local multi-account manager for Codex CLI with isolated runtime/auth state and TUI clone management.

Reusable model provider adapters and streaming runtime from OpenClaw

Oxc Transformer Node API

babel's modular runtime helpers

A blazing-fast tool for generating isolated declarations.

Externalise references to helpers and builtins, automatically polyfilling your code without polluting globals

Runtime for Regenerator-compiled generator and async functions.

Runtime agnostic JS utils