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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.
50 critical findings reported by cisco-skill-scanner, 25 of them in the installed artifact. The composite score alone does not reflect this — read the per-scanner reports below.
Claude Skills install to a single target, no runtime picker.
nerlo install -- build-plugin
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- build-plugin ~/.claude/skills/
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
5 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 · 1.8s
v2.0.11
223 findings · 35.4s
v0.3.74
11 findings · 7.1s
v0.1.0
3 findings · 8.3s
v0.1.0
5 findings · 8.3s
vv0.3.2
No Go packages were found in this artifact. What each scanner covers
0 findings · 0.3s
v0.1.0
This scanner found nothing in this artifact that it assesses. What each scanner covers
0 findings · 2.1s
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 21, 2026 | Scan Halted | — | agentshield: completecisco-skill-scanner: completeagent-audit-kit: completenerlo-behavioral: completenerlo-install-instruction: completecapslock ·n/a: not applicablenerlo-multi-source ·n/a: not applicable | 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 242 findings across every scanner that examined this package. 25 of 50 findings rated critical by their scanner were among the dismissals.
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.
60 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: LOW_ANALYZABILITY, AAK-LEGAL-002, SOCIAL_ENG_VAGUE_DESCRIPTION and 1 more · Files: /repo/.claude/skills/eval/fixtures/debt-project-deferred, /repo/.claude/skills/eval/fixtures/debt-project, /repo/source/skills/eval/fixtures/debt-project-deferred and 35 more · reported by cisco-skill-scanner, agent-audit-kit
27 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: COMMAND_INJECTION_JS_CHILD_PROCESS, COMMAND_INJECTION_EVAL, COMMAND_INJECTION_JS_FUNCTION_CONSTRUCTOR and 2 more · Files: /repo/scripts/transformers/buildctl-evidence.test.js, /repo/scripts/transformers/buildctl-phase-results.test.js, /repo/scripts/transformers/buildctl-plan.test.js and 5 more · reported by cisco-skill-scanner, nerlo-behavioral
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.
53 MANIFEST_MISSING_LICENSE
Files: /repo/.codex/skills/review-plan/SKILL.md, /repo/.codex/skills/verify/SKILL.md, /repo/.codex/skills/architect-review/SKILL.md and 50 more · reported by cisco-skill-scanner
25 COMMAND_INJECTION_JS_CHILD_PROCESS
Files: /repo/.codex/skills/build/buildctl/plan-contract.js, /repo/.codex/skills/build/buildctl/repository.js, /repo/.claude/skills/build/buildctl/plan-contract.js and 9 more · reported by cisco-skill-scanner
23 HIDDEN_DATA_FILE
Files: /repo/.agents/skills/verify/reference/evidence-requirements.md, /repo/.agents/skills/impl-plan/SKILL.md, /repo/.opencode/commands/review-plan.md and 20 more · reported by cisco-skill-scanner
20 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md, /repo/.codex/skills/verify/reference/SKILL.md, /repo/.codex/skills/build/reference/SKILL.md and 17 more · reported by cisco-skill-scanner
14 HIDDEN_EXECUTABLE_SCRIPT
Files: /repo/.agents/skills/build/buildctl/coverage.js, /repo/.agents/skills/build/buildctl/evidence.js, /repo/.agents/skills/build/buildctl/plan-contract.js and 11 more
Artifact contains critical command injection vulnerabilities and hidden executable scripts.
The artifact includes multiple instances of potential command injection in JavaScript files such as `plan-contract.js`, `repository.js`, and `check-sync.js`, which could lead to shell execution. Additionally, there are several hidden executable scripts present within the installed code. The presence of dynamic execution capabilities and low analyzability further increases the risk profile of this artifact.
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 LOW_ANALYZABILITY
Files: /repo/.codex/skills/build, /repo/.claude/skills/build, /repo/plugins/build/skills/build and 5 more · reported by cisco-skill-scanner
5 opt.nerlo-rules.nerlo-install-run-bundled-artifact
Files: /repo/.agents/skills/architect-review/reference/shape-scan.sh, /repo/.claude/skills/architect-review/reference/shape-scan.sh, /repo/.codex/skills/architect-review/reference/shape-scan.sh and 2 more · reported by nerlo-install-instruction
2 AAK-MARKETPLACE-001
Files: .claude-plugin/marketplace.json, .agents/plugins/marketplace.json · reported by agent-audit-kit
2 opt.nerlo-rules.nerlo-dynamic-exec
Files: /repo/scripts/check-sync.js · reported by nerlo-behavioral
1 AAK-LEGAL-002
Files: package.json · reported by agent-audit-kit
1 EXCESSIVE_FILE_COUNT
Files: /repo/. · reported by cisco-skill-scanner
1 FILE_MAGIC_MISMATCH
Files: /repo/scripts/transformers/frontmatter.js · reported by cisco-skill-scanner
Showing 25 of 49; the rest are in the per-scanner reports above.