Plimsoll

Plimsoll is a self-hosted code-execution sandbox aimed at developers who let AI agents write and run programs. The project reports whether a run used process, container, kernel or virtual-machine isolation and lets a caller require a minimum tier. Its creator also describes per-run request and result hashes, optional chained records, and a broker that attaches credentials only to approved API calls outside the sandbox. These are the project’s documented design claims. The creator says the software is pre-1.0 and has no outside security audit; the reported tier is based on configuration and startup checks, not hardware attestation.