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Claude Skills are markdown + scripts loaded into Claude Code; scanned with the same pipeline.
We found this by crawling public sources and nobody has attested to it. That is how most of the registry gets here, and it is not a mark against the artifact — it only means no authenticated act of publication is on record. An artifact can be the vendor's own and still appear here.
6 critical findings reported by cisco-skill-scanner, agent-audit-kit. The composite score alone does not reflect this — read the per-scanner reports below.
This artifact ships from 2 sources and their verdicts differ. The worst is github (Flagged). Installing from a cleaner source does not mean the others are safe — check the source you actually install from.
github: https://github.com/javimosch/machin, 271 findings
Claude Skills install to a single target, no runtime picker.
nerlo install -- machin
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- machin ~/.claude/skills/
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
6 of 11 scanners examined this package. The rest do not apply to it — language, ecosystem and packaging decide which analyzers can say anything, and a scanner that cannot examine an artifact reports nothing rather than passing it.
v2.0.11
92 findings · 14.1s
v0.3.74
4 findings · 6.6s
v0.1.0
0 findings · 6.3s
v0.1.0
13 findings · 6.4s
vv0.3.2
0 findings · 8.2s
v0.1.0
0 findings · 9.9s
v1.4.0
None of the entry points this scanner reads were found in this artifact. What each scanner covers
0 findings · 0.2s
No report in this scan: govulncheck, osv-scanner, trivy, trivy_image.
1 scan on record. Every scan's full results are retained immutably for 24 months.
| Completed | Composite | Change | Scanners | Status |
|---|---|---|---|---|
| Aug 21, 2026 | Scan Halted | — | agentshield ·n/a: not applicablecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completecapslock: completenerlo-multi-source: complete | rejected |
Findings in files this artifact installs stand as reported; a model re-read the rest and said which ones it believes are false positives. This is a second opinion published beside the evidence, not a correction to it: the per-scanner reports above are unchanged, every dismissed finding is still listed there at its original severity, and the score and the Flagged badge are computed from those raw severities alone. Nothing below moved them.
Out of 109 findings across every scanner that examined this package. None of the 6 findings rated critical by their scanner were dismissed.
Not reviewed is not the same as clean. Those 1 finding stand exactly as their scanners reported them, at full severity, as they would have without this review.
Two keys had to turn. The model had to name a reason from a fixed list of six, and a deterministic check of ours — over which files this artifact actually installs — had to independently agree. Anything it could not corroborate is in “not reviewed” above, at full severity.
11 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: UNANALYZABLE_BINARY, SOCIAL_ENG_VAGUE_DESCRIPTION, MANIFEST_MISSING_LICENSE and 1 more · Files: /repo/docs/self-hosting-demo.mp4, /repo/docs/SKILL.md, /repo/examples/SKILL.md and 2 more · reported by cisco-skill-scanner
2 Agent instruction file — The match is in a file that instructs an AI coding agent — a CLAUDE.md or similar. It is documentation of intent, and our own check confirmed it is not part of what gets installed.
Rules: AAK-AGENT-002, opt.nerlo-rules.nerlo-install-run-bundled-artifact · Files: AGENTS.md, /repo/AGENTS.md · reported by agent-audit-kit, nerlo-install-instruction
1 Test or fixture file — The match is in a test or fixture. Our own check confirmed the file is not part of what gets installed.
Rules: FILE_MAGIC_MISMATCH · Files: /repo/testdata/saml/assertion_c14n.txt · reported by cisco-skill-scanner
These findings are in files this artifact installs and are not placeholder values. No false-positive basis can be corroborated for such a finding, so this review never dismisses one; they were not sent to the model and stand at their scanner's severity.
26 MANIFEST_MISSING_LICENSE
Files: /repo/plugins/machin/skills/machin-start/SKILL.md, /repo/plugins/machin/skills/machin-backend/SKILL.md, /repo/plugins/machin/skills/machin-gamedev/SKILL.md and 23 more · reported by cisco-skill-scanner
22 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/plugins/machin/skills/machin-backend/SKILL.md, /repo/plugins/machin/skills/machin-deploy/SKILL.md, /repo/plugins/machin/skills/machin-web/SKILL.md and 19 more · reported by cisco-skill-scanner
8 ARCHIVE_FILE_DETECTED
Files: /repo/vendor/sqlite/sqlite3.h.gz, /repo/vendor/sqlite/sqlite3.c.gz, /repo/vendor/zlib/zlib-src.tar.gz and 1 more · reported by cisco-skill-scanner
8 UNANALYZABLE_BINARY
Files: /repo/vendor/sqlite/sqlite3.c.gz, /repo/vendor/sqlite/sqlite3.h.gz, /repo/vendor/zlib/zlib-src.tar.gz and 1 more · reported by cisco-skill-scanner
7 opt.nerlo-rules.nerlo-install-pipe-to-shell
Files: /repo/CHANGELOG.md, /repo/README.md, /repo/install.sh and 2 more
1 The model did not answer for these findings.
Rules: FILE_MAGIC_MISMATCH · Files: /repo/testdata/saml/signedinfo_c14n.txt · reported by cisco-skill-scanner
Critical command injection and path traversal risks identified.
The artifact contains critical command injection vulnerabilities in `/repo/bench/compile-speed/measure.py`, allowing shell execution. Path traversal vulnerabilities are present in `/repo/bench/cold-start/measure.py`, which could lead to unauthorized file access or writes. Additionally, the artifact includes high-severity findings related to low analyzability in `/repo/vendor/certs` and `/repo/vendor/sqlite`.
Concern level assessed by the review: Critical. This is the review's scale, not the registry badge.
Reviewed by gemini-2.5-flash. The model sees the findings, not your code, and cannot change a score.
6 PIPELINE_TAINT_FLOW
Files: /repo/plugins/machin/skills/machin-start/SKILL.md, /repo/skills/machin-start/SKILL.md, /repo/SKILL.md and 1 more · reported by cisco-skill-scanner
4 opt.nerlo-rules.nerlo-install-fetch-raw-then-run
Files: /repo/README.md, /repo/install.sh, /repo/plugins/machin/skills/machin-start/SKILL.md and 1 more · reported by nerlo-install-instruction
2 AAK-SKILL-001
Files: plugins/machin/skills/machin-start/SKILL.md, skills/machin-start/SKILL.md · reported by agent-audit-kit
2 COMMAND_INJECTION_OS_SYSTEM
Files: /repo/bench/compile-speed/measure.py · reported by cisco-skill-scanner
2 LOW_ANALYZABILITY
Files: /repo/vendor/certs, /repo/vendor/sqlite · reported by cisco-skill-scanner
2 MANIFEST_DESCRIPTION_TOO_LONG
Files: /repo/plugins/machin/skills/machin-gamedev/SKILL.md, /repo/skills/machin-gamedev/SKILL.md · reported by cisco-skill-scanner
2 PATH_TRAVERSAL_OPEN
Files: /repo/bench/cold-start/measure.py · reported by cisco-skill-scanner
1 AAK-MARKETPLACE-001
Files: .claude-plugin/marketplace.json · reported by agent-audit-kit
1 EXCESSIVE_FILE_COUNT
Files: /repo/. · reported by cisco-skill-scanner
1 opt.nerlo-rules.nerlo-install-run-bundled-artifact
Files: /repo/selfhost/BOOTSTRAP.md · reported by nerlo-install-instruction