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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.
81 critical findings reported by cisco-skill-scanner, agent-audit-kit, 20 of them in the installed artifact. 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/bczy/prohimuf, 1721 findings
Claude Skills install to a single target, no runtime picker.
nerlo install -- muf
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- muf ~/.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
43 findings · 1.1s
v2.0.11
953 findings · 99.8s
v0.3.74
32 findings · 70.0s
v0.1.0
0 findings · 22.8s
v0.1.0
2 findings · 22.8s
v0.1.0
0 findings · 14.5s
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 1,030 findings across every scanner that examined this package. 61 of 81 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.
134 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: PROMPT_INJECTION_IGNORE_INSTRUCTIONS, YARA_prompt_injection_unicode_steganography, AAK-HEALTHCARE-AI-004 and 5 more · Files: /repo/.github/panel-prompts/SKILL.md, /repo/docs/qa/evidence/crt-post-process/08-playing-crt-v2.png, /repo/docs/qa/evidence/crt-post-process/10-playing-crt-v3.png and 36 more · reported by cisco-skill-scanner, agent-audit-kit
132 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, DATA_EXFIL_JS_FS_ACCESS, AAK-SECRET-004 and 3 more · Files: /repo/scripts/__tests__/check-art-prompts.test.mjs, /repo/scripts/__tests__/check-hero-wiring.test.mjs, /repo/scripts/__tests__/check-nearfg-style.test.mjs and 14 more · reported by cisco-skill-scanner, agent-audit-kit
11 CI or editor configuration — The match is in build, CI or editor configuration, confirmed by our own check to be outside the installed artifact.
Rules: YARA_credential_harvesting_generic, AAK-AGENT-TRUST-002, AAK-GHA-IMMUTABLE-001 and 1 more · Files: /repo/.github/workflows/code-review-panel.yml, .github/workflows/code-review-panel.yml, /repo/.github/SKILL.md · reported by cisco-skill-scanner, agent-audit-kit
6 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-003, AAK-AGENT-002, opt.nerlo-rules.nerlo-install-run-bundled-artifact and 1 more · Files: AGENTS.md, CLAUDE.md, /repo/CLAUDE.md and 1 more · reported by agent-audit-kit, nerlo-install-instruction, agentshield
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.
282 DATA_EXFIL_JS_FS_ACCESS
Files: /repo/scripts/align-troncon.mjs, /repo/scripts/align-windows.mjs, /repo/scripts/bakeoff-boss-models.mjs and 55 more · reported by cisco-skill-scanner
164 MANIFEST_MISSING_LICENSE
Files: /repo/.claude/skills/bmad-qa-generate-e2e-tests/SKILL.md, /repo/.claude/skills/root-cause/SKILL.md, /repo/.claude/skills/bmad-create-prd/SKILL.md and 161 more · reported by cisco-skill-scanner
66 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/SKILL.md, /repo/references/SKILL.md, /repo/scripts/SKILL.md and 63 more · reported by cisco-skill-scanner
55 FILE_MAGIC_MISMATCH
Files: /repo/.claude/skills/bmad-market-research/research.template.md, /repo/.claude/skills/bmad-technical-research/research.template.md, /repo/.claude/skills/bmad-domain-research/research.template.md and 19 more · reported by cisco-skill-scanner
40 YARA_prompt_injection_unicode_steganography
Files: /repo/public/assets/audio/bgm_danger.mp3, /repo/public/assets/audio/bgm_loop.mp3, /repo/public/assets/audio/bgm_loop2.mp3 and 8 more
The model could have called any of these a false positive and did not.
4 OBFUSCATION_XOR_ENCODING
Files: /repo/scripts/gen-courier-sprites.mjs, /repo/scripts/gen-vehicle-sprites.mjs · reported by cisco-skill-scanner
Critical command injection and high-risk data exfiltration capabilities identified.
The artifact contains critical command injection vulnerabilities via child process execution in multiple JavaScript scripts, including `/repo/scripts/check-agents-infographic.mjs` and `/repo/scripts/test-affected.mjs`. High-risk data exfiltration through file system access is present in numerous locations. Additionally, the artifact includes hooks for environment mutation and file deletion in `.claude/hooks/session-start.sh`, and an untrusted execution path in `scripts/setup-tooling.sh`.
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.
20 COMMAND_INJECTION_JS_CHILD_PROCESS
Files: /repo/scripts/check-agents-infographic.mjs, /repo/scripts/check-workflows.mjs, /repo/scripts/promote-hero.mjs and 3 more · reported by cisco-skill-scanner
17 BINARY_FILE_DETECTED
Files: /repo/public/assets/audio/bgm_win.mp3, /repo/public/assets/audio/bgm_tension.mp3, /repo/public/assets/audio/bgm_loop.mp3 and 8 more · reported by cisco-skill-scanner
17 UNANALYZABLE_BINARY
Files: /repo/public/assets/audio/shoot.wav, /repo/public/assets/audio/bgm_loop2.mp3, /repo/public/assets/audio/bgm_win.mp3 and 8 more · reported by cisco-skill-scanner
8 AAK-HEALTHCARE-AI-004
Files: .claude/skills/bmad-agent-tech-writer/SKILL.md, .claude/skills/bmad-editorial-review-prose/SKILL.md, .claude/skills/bmad-create-prd/steps-c/step-02b-vision.md and 5 more · reported by agent-audit-kit
8 DATA_EXFIL_JS_NETWORK
Files: /repo/scripts/gen-street-paid.mjs, /repo/scripts/mcp-level-editor/core.mjs, /repo/scripts/lib/gptimage.mjs and 1 more · reported by cisco-skill-scanner
5 YARA_autonomy_abuse_generic
Files: /repo/.claude/skills/bmad-validate-prd/steps-v/SKILL.md, /repo/.claude/skills/bmad-edit-prd/steps-e/SKILL.md · reported by cisco-skill-scanner
4 hooks-file-delete-2811
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
3 LOW_ANALYZABILITY
Files: /repo/public/assets/audio, /repo/scripts, /repo · reported by cisco-skill-scanner
2 AAK-MCP-006
Files: .mcp.json · reported by agent-audit-kit
2 AAK-MCP-ATTEST-001
Files: .mcp.json · reported by agent-audit-kit
2 EXCESSIVE_FILE_COUNT
Files: /repo/scripts/., /repo/. · reported by cisco-skill-scanner
2 hooks-env-mutation-1110
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
2 hooks-env-mutation-1194
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
2 hooks-global-install-1902
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
2 hooks-global-install-2328
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
2 hooks-logging-disabled-1867
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
2 hooks-logging-disabled-2293
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
2 hooks-logging-disabled-3045
Files: hooks/session-start.sh, .claude/hooks/session-start.sh · reported by agentshield
2 OVERSIZED_FILE
Files: /repo/public/assets/audio/bgm_danger.mp3 · reported by cisco-skill-scanner
1 AAK-ANTHROPIC-SDK-001
Files: scripts/mcp-level-editor/server.mjs · reported by agent-audit-kit
1 AAK-LEGAL-002
Files: package.json · reported by agent-audit-kit
1 AAK-MCP-018
Files: scripts/mcp-level-editor/server.mjs · reported by agent-audit-kit
1 AAK-OAUTH-3P-001
Files: package.json · reported by agent-audit-kit
1 AAK-SKILL-UNTRUSTED-EXEC-PATH
Files: scripts/setup-tooling.sh · reported by agent-audit-kit
1 AAK-SUPPLY-003
Files: package.json · reported by agent-audit-kit
1 agents-oversized-prompt-.claude/agents/COLLABORATION.md
Files: .claude/agents/COLLABORATION.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/game-designer.md
Files: .claude/agents/game-designer.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/game-graphist.md
Files: .claude/agents/game-graphist.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/gpu-specialist.md
Files: .claude/agents/gpu-specialist.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/graphic-references.md
Files: .claude/agents/graphic-references.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/lead-art.md
Files: .claude/agents/lead-art.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/lead-game-designer.md
Files: .claude/agents/lead-game-designer.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/producer.md
Files: .claude/agents/producer.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/qa-lead.md
Files: .claude/agents/qa-lead.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/sound-designer.md
Files: .claude/agents/sound-designer.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/tech-writer.md
Files: .claude/agents/tech-writer.md · reported by agentshield
1 agents-oversized-prompt-.claude/agents/ux-designer.md
Files: .claude/agents/ux-designer.md · reported by agentshield
1 agents-oversized-prompt-agents/COLLABORATION.md
Files: agents/COLLABORATION.md · reported by agentshield
1 agents-oversized-prompt-agents/game-designer.md
Files: agents/game-designer.md · reported by agentshield
1 agents-oversized-prompt-agents/game-graphist.md
Files: agents/game-graphist.md · reported by agentshield
1 agents-oversized-prompt-agents/gpu-specialist.md
Files: agents/gpu-specialist.md · reported by agentshield
1 agents-oversized-prompt-agents/graphic-references.md
Files: agents/graphic-references.md · reported by agentshield
1 agents-oversized-prompt-agents/lead-art.md
Files: agents/lead-art.md · reported by agentshield
1 agents-oversized-prompt-agents/lead-game-designer.md
Files: agents/lead-game-designer.md · reported by agentshield
1 agents-oversized-prompt-agents/producer.md
Files: agents/producer.md · reported by agentshield
1 agents-oversized-prompt-agents/qa-lead.md
Files: agents/qa-lead.md · reported by agentshield
1 agents-oversized-prompt-agents/sound-designer.md
Files: agents/sound-designer.md · reported by agentshield
1 agents-oversized-prompt-agents/tech-writer.md
Files: agents/tech-writer.md · reported by agentshield
1 agents-oversized-prompt-agents/ux-designer.md
Files: agents/ux-designer.md · reported by agentshield
1 HIDDEN_DATA_FILE
Files: /repo/.yarnrc.yml · reported by cisco-skill-scanner
1 MANIFEST_INVALID_NAME
Files: /repo/_bmad/bmm/3-solutioning/bmad-architecture/assets/SKILL.md · reported by cisco-skill-scanner
Showing 25 of 324; the rest are in the per-scanner reports above.