# nasa/spacewasm

A flight-compliant WebAssembly interpreter.

Repository: https://github.com/nasa/spacewasm
Canonical: https://ross.abutalabs.com/products/spacewasm
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: flight-software, webassembly, embedded-systems
Last push: 2026-08-25T02:25:26+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 60, longevity 5
- inputs: {"age_days": 70, "days_push": 9, "days_rel": 9, "gap_med": 0, "n_releases_24m": 22}
- flags: prerelease_only, young
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1493, forks 52 (observed 2026-08-28T04:04:52.930403+00:00)

## What it is
SpaceWasm is a no_std WebAssembly 1.0 decoder, validator, and interpreter written in Rust, developed at NASA JPL for executing Wasm binaries on-board spacecraft. It provides streaming decoding with fixed memory usage and a sandboxed interpreter designed for flight-compliant, embedded environments.

## Use cases
- run webassembly modules on spacecraft flight software
- embed a sandboxed wasm interpreter in a no_std embedded system
- decode and validate wasm binaries with bounded memory usage
- standardize spacecraft activity sequencing with webassembly
- execute untrusted low-trust code on-board with restricted access
- port wasm workloads across flight platforms

## When to choose
- you need a flight-compliant or safety-critical wasm interpreter with deterministic memory use
- your embedded environment requires no_std support
- you want to sandbox untrusted executables on-board with restricted compute and hooks

## When to avoid
- you need maximum execution speed for direct bytecode interpretation
- you require wasm features beyond the 1.0 specification
- you need a general-purpose desktop or browser wasm runtime

## Facets
- artifact type: library
- maturity: active
- function: interpreter, parser, wasm, embedded
- domain: embedded-systems
- platform: embedded, rust, cross-platform
- tags: no_std, wasm-interpreter, flight-software, spacecraft, jpl, sandboxing, decoder, validator, webassembly

## Member repositories
- nasa/spacewasm (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:52.930403+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:33:27.738501+00:00, confidence not recorded.
  - readme: https://github.com/nasa/spacewasm (fetched 2026-08-28T04:04:52.930403+00:00, sha b16274c67b0a)
  - registry_crates: https://crates.io/api/v1/crates/spacewasm (fetched 2026-08-29T11:39:01.205034+00:00, sha f016169ada08)
- Data as of 2026-08-30T08:39:29.467469+00:00.