janitor-security SKILL.md skillC
janitor-security from khendzel/skills-janitor is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add khendzel/skills-janitor/janitor-security@v1.6.0Pins v1.6.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- C, 15 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- khendzel/skills-janitor
- Path
skills/janitor-security/SKILL.md- Versions recorded
- 1
- Latest version
- v1.6.0, committed Jul 15, 2026
- Size
- 5,015 bytes
- Repository stars
- 122
- License
- MIT
Heuristic security scan of installed skills — prompt-injection phrases, hidden unicode instructions, credential-store access, network-pipe-to-shell and payload-smuggling patterns. Use when the user asks 'are my skills safe', wants to scan skills for prompt injection or malware patterns, or before trusting a newly installed skill. Trigger with '/janitor-security'.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Security Scan Heuristic scan of skill content for prompt-injection and malicious patterns. ## Overview A skill is text your agent trusts: its SKILL.md is read as instructions and its scripts run on your machine. Public research (Snyk's ToxicSkills, 2026) found prompt injection in roughly a third of tested community skills. This scan flags the known bad shapes across every installed skill, in every scope (user, project, codex, plugin): - **Injection phrases** — "ignore all previous instructions", "do not tell the user" - **Hidden instructions** — imperative text in HTML comments (invisible when rendered), zero-width/bidi unicode between plain characters - **Payload smuggling** — large decodable base64 blobs in markdown - **Dangerous scripts** — network piped into a shell (`curl … | bash`), decode-and-execute, credential-store access (`~/.ssh`, `~/.aws`, keychain), URL shorteners, plain-HTTP calls, uploads of variable data Findings are heuristics, not proof: a RISK verdict means "read this before trusting it". Legit tools trip these rules too (e.g. an installer that pipes curl into bash) — the point is that YOU see it and decide. ## Prerequisites …
Read the whole file at its exact version.
How to install
mdr add khendzel/skills-janitor/janitor-security@sha256:f21b2b570c00feb0The line at the top of this page pins the label v1.6.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_62jlpkk6yvtg6omi)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 15, 2026.
Audit of the latest version
- fail: No prompt-injection phrasing (matched: ignore all previous instructions)
- fail: No curl or wget piped into a shell (matched: curl … | bash)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5015 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
khendzel/skills-janitor · 122 stars · license MIT · pushed 2026-09-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_62jlpkk6yvtg6omi GET https://markdownregistry.com/api/v1/resolve?ref=khendzel/skills-janitor/janitor-security GET https://markdownregistry.com/api/v1/blob/f21b2b570c00feb0201032cfb6770652306b945281d43b0756f457e172a4c058
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.