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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.
29 critical findings reported by cisco-skill-scanner. 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/rjcorwin/cook, 169 findings
Claude Skills install to a single target, no runtime picker.
nerlo install -- @let-it-cook/cli
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- @let-it-cook/cli ~/.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.
v1.4.0
0 findings · 0.8s
v2.0.11
105 findings · 9.7s
v0.3.74
2 findings · 2.3s
v0.1.0
9 findings · 3.4s
v0.1.0
11 findings · 3.4s
v0.1.0
0 findings · 7.9s
vv0.3.2
No Go packages were found in this artifact. What each scanner covers
0 findings · 0.1s
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 22, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completecapslock ·n/a: not applicablenerlo-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 127 findings across every scanner that examined this package. None of the 29 findings rated critical by their scanner were dismissed.
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.
14 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: SOCIAL_ENG_VAGUE_DESCRIPTION, MANIFEST_MISSING_LICENSE · Files: /repo/tests/SKILL.md, /repo/tests/runs/20260318-225105/SKILL.md, /repo/tests/runs/20260318-025400/SKILL.md and 4 more · 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.
28 COMMAND_INJECTION_JS_CHILD_PROCESS
Files: /repo/src/cli.ts, /repo/src/executor.ts, /repo/src/race.ts and 3 more · reported by cisco-skill-scanner
16 MANIFEST_MISSING_LICENSE
Files: /repo/no-code/SKILL.md, /repo/skill/SKILL.md, /repo/.claude/skills/cook/SKILL.md and 13 more · reported by cisco-skill-scanner
16 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/no-code/SKILL.md, /repo/skill/SKILL.md, /repo/.claude/skills/cook/SKILL.md and 13 more · reported by cisco-skill-scanner
13 DATA_EXFIL_JS_FS_ACCESS
Files: /repo/src/config.ts, /repo/src/executor.ts, /repo/src/race.ts and 4 more · reported by cisco-skill-scanner
13 PIPELINE_TAINT_FLOW
Files: /repo/plans/000-inception/decision-001-architecture.md, /repo/plans/000-inception/plan-review-001.md, /repo/plans/000-inception/plan-review-002.md and 4 more · reported by cisco-skill-scanner
9 opt.nerlo-rules.nerlo-dynamic-exec
Files: /repo/src/executor.ts, /repo/src/race.ts, /repo/src/sandbox.ts · reported by nerlo-behavioral
Artifact allows shell execution and dynamic code evaluation
The artifact contains multiple critical vulnerabilities for shell execution via command injection in files such as `cli.ts`, `executor.ts`, `native-runner.ts`, `race.ts`, and `sandbox.ts`. It also permits dynamic code evaluation using the `Function` constructor. High severity findings indicate potential data exfiltration through file system access and general taint flow issues. These capabilities could lead to arbitrary code execution and unauthorized data access.
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.
8 opt.nerlo-rules.nerlo-install-pipe-to-shell
Files: /repo/plans/000-inception/decision-001-architecture.md, /repo/plans/000-inception/plan-review-001.md, /repo/plans/000-inception/plan-review-002.md and 3 more · reported by nerlo-install-instruction
3 opt.nerlo-rules.nerlo-install-shell-inline-command
Files: /repo/plans/000-inception/plan.md, /repo/plans/g5t-sandbox-shell/plan-003.md, /repo/plans/g5t-sandbox-shell/pr.md · reported by nerlo-install-instruction
2 HIDDEN_DATA_FILE
Files: /repo/.cook/Dockerfile, /repo/.cook/config.json · reported by cisco-skill-scanner
1 AAK-LEGAL-002
Files: package.json · reported by agent-audit-kit
1 AAK-SUPPLY-005
Files: package-lock.json · reported by agent-audit-kit
1 COMMAND_INJECTION_JS_FUNCTION_CONSTRUCTOR
Files: /repo/src/template.ts · reported by cisco-skill-scanner
1 EXCESSIVE_FILE_COUNT
Files: /repo/. · reported by cisco-skill-scanner
1 LOW_ANALYZABILITY
Files: /repo · reported by cisco-skill-scanner
Showing 25 of 72; the rest are in the per-scanner reports above.