@ifc-lite/sandbox

QuickJS-in-WASM sandboxed script execution for ifc-lite. Runs user or LLM-generated scripts in a secure, isolated interpreter with only the bim.* API exposed: no DOM, no fetch, no network access. Permissions and resource limits (timeout, memory) are configurable per sandbox, and TypeScript input is transpiled on the fly.

Install

npm install @ifc-lite/sandbox

Usage

import { createSandbox } from '@ifc-lite/sandbox';
import { createBimContext } from '@ifc-lite/sdk';

const bim = createBimContext({ backend: myBackend });
const sandbox = await createSandbox(bim, {
  permissions: { mutate: true },
  limits: { timeoutMs: 10_000 },
});

const result = await sandbox.eval(`
  const walls = bim.query.byType('IfcWall');
  console.log('Found', walls.length, 'walls');
  walls.length;
`);

console.log(result.value); // number of walls
console.log(result.logs);  // captured console output

sandbox.dispose();

Features

• QuickJS interpreter compiled to WASM: full isolation from the host page
• Only the bridged bim.* API is reachable from scripts
• Configurable SandboxPermissions and SandboxLimits (with DEFAULT_PERMISSIONS / DEFAULT_LIMITS)
• Captured console logs and structured ScriptResult / ScriptError
• TypeScript support via transpileTypeScript (esbuild-wasm)
• Machine-readable bridge schema (NAMESPACE_SCHEMAS, exported at @ifc-lite/sandbox/schema) for LLM tool integration

Links

• Docs: https://ifclite.dev/docs/
• Source: https://github.com/LTplus-AG/ifc-lite

License

MPL-2.0