Show HN: Plimsoll, a self-hosted sandbox for code your AI agent writes

Plimsoll is a self-hosted sandbox tool that safely executes untrusted code written by AI agents while providing transparency about the security isolation level used. The tool categorizes isolation strength into four tiers (process, container, kernel, VM), reports this tier with every result, and allows users to set minimum security requirements before code runs. It can also test AI-generated code against predefined scenarios and provides cryptographic verification of execution results through SHA-256 hashes and attestation signatures.