What the reviewer found
A CTF/pentest reference catalog of known sandbox-escape techniques (pyjail, Lua, chroot, seccomp, container, browser) — a playbook, not something the file itself executes. The `/etc/shadow` read and the base64|sh line are documented attacker techniques listed for defensive/offensive-security reference, matching the dual-use playbook carve-out.
dual-use— a security tool that can be misusedexample-or-fixture— an example or test fixture
What was read
The file as it ships in miru-zero/zero-brain:
skills/sandbox-escape-techniques/SKILL.md
What the static scan said
The scan flagged 2things. The reviewer kept 0 and dismissed 2 as false.
PE3Reaches for credential files — false positiveSC3Encoded or obfuscated payload — false positive
How this review was made
Sonnet 5 read the files above on 7 September 2026 and answered three questions: is it dangerous to whoever installs it, is each scanner finding real, and what should the installer know. The verdict is bound to the file's hash; when the file changes, it is scanned afresh and reviewed again. A script that changes while the definition does not is not re-reviewed — that is a known gap. How the scan and the review work.