This skill should be used when the user asks to "sandbox a command", "isolate a process", "run in a sandbox", "restrict filesystem access", "restrict network access", "add sandcastle", "use sandcastle", "wrap with sandcastle", "add sandbox to tests", "isolate tests with sandcastle", "set up sandcastle config", "add sandcastle to flake", or mentions sandcastle, bubblewrap isolation, sandbox-runtime, command sandboxing in a Nix project, or preventing tests from accessing secrets.
2026-04-14