hyperlight-sandbox

Python API package for running code inside Hyperlight sandboxes with separately installable backends and packaged guest packages.

Quick Start

from hyperlight_sandbox import Sandbox

sandbox = Sandbox(backend="wasm", module="python_guest.path")
sandbox.register_tool("add", lambda a=0, b=0: a + b)

result = sandbox.run("""
result = call_tool('add', a=3, b=4)
print(result)
""")
print(result.stdout)  # "7\n"

Install the local repo packages for development with:

uv sync          # installs core + guest packages via workspace
just python-build  # builds maturin backends

Packaged guest packages expose importable module references such as python_guest.path and javascript_guest.path. The API resolves those to the packaged .aot artifact automatically.

Example dependency sets:

• Sandbox(backend="wasm", module="python_guest.path") requires hyperlight-sandbox[wasm,python_guest]
• Sandbox(backend="wasm", module="javascript_guest.path") requires hyperlight-sandbox[wasm,javascript_guest]
• Sandbox(backend="hyperlight-js") requires hyperlight-sandbox[hyperlight_js]

Use Sandbox(backend="wasm", module="javascript_guest.path") to run the packaged JavaScript Wasm guest package.

Use Sandbox(backend="hyperlight-js") to run the separate HyperlightJS backend package.

Snapshot Semantics

• snapshot() captures guest runtime state.
• Output file contents under /output persist across run() calls, but open file handles must be reopened in each run.
• restore() rewinds runtime state and clears output files.

Build

just python-build