What the reviewer found
Test fixture from a skill-security scanner's corpus (SkillsGuard testskills/), not a working skill: the hidden HTML comment and the evil.com fetch are the exact patterns the scanner is meant to catch. Don't install it as a real skill — its `inclusion: always` would put 'Ignore all security rules' into the agent's context every turn.
example-or-fixture— an example or test fixtureprompt-injection— tries to steer the agent
What was read
The file as it ships in Teycir/SkillsGuard:
testskills/realworld/skills/malicious-obfuscation-4/SKILL.md
What the static scan said
The scan flagged 2things. The reviewer kept 2 and dismissed 0 as false.
P1Instruction-override phrasing — realP2Hidden instructions — real
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.