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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.
34 critical findings reported by cisco-skill-scanner, agent-audit-kit, 17 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 -- harmonious
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- harmonious ~/.claude/skills/
Install respects the composite badge: Clean proceeds, Caution prompts for confirmation, and Flagged is refused. Write operations require an API token.
4 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
2 findings · 0.6s
v2.0.11
85 findings · 53.9s
v0.3.74
19 findings · 8.5s
v0.1.0
4 findings · 3.7s
v0.1.0
No source files this scanner can analyze were found in this artifact. What each scanner covers
0 findings · 3.7s
vv0.3.2
No Go packages were found in this artifact. What each scanner covers
0 findings · 0.1s
v0.1.0
This scanner found nothing in this artifact that it assesses. What each scanner covers
0 findings · 0.9s
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 ·n/a: not applicablenerlo-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 110 findings across every scanner that examined this package. 17 of 34 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.
50 Documentation or example — The match is in documentation or sample code, confirmed by our own check to be outside the installed artifact.
Rules: YARA_coercive_injection_generic, COMPOUND_EXTRACT_EXECUTE, FIND_EXEC_PATTERN and 6 more · Files: /repo/docs/historical/SKILL.md, /repo/docs/arcana/SKILL.md, /repo/docs/architecture/SKILL.md and 16 more · reported by cisco-skill-scanner, agent-audit-kit, nerlo-install-instruction
7 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: AAK-TAINT-001, FILE_MAGIC_MISMATCH · Files: toylangc/tests/common/inlining_harness.rs, /repo/toylangc/tests/integration_projects/tg_i32_i64/expected_output.txt, /repo/toylangc/tests/integration_projects/drop/fixture2_two_vecs_lifo_order/expected_output.txt and 3 more · reported by agent-audit-kit, 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.
10 AAK-TAINT-002
Files: rustc-lang-facade/src/lib.rs, toylangc/src/stub_gen.rs · reported by agent-audit-kit
10 MANIFEST_MISSING_LICENSE
Files: /repo/.claude/skills/good-doc/SKILL.md, /repo/.claude/skills/guardian-post-review/SKILL.md, /repo/.claude/skills/guardian-teach/SKILL.md and 7 more · reported by cisco-skill-scanner
7 FIND_EXEC_PATTERN
Files: /repo/SKILL.md · reported by cisco-skill-scanner
6 HIDDEN_DATA_FILE
Files: /repo/vendor/inkwell/.cargo-ok, /repo/vendor/inkwell/.codecov.yml, /repo/vendor/inkwell/.rustfmt.toml · reported by cisco-skill-scanner
6 SOCIAL_ENG_VAGUE_DESCRIPTION
Files: /repo/.claude/skills/write-pretooluse-hook/SKILL.md, /repo/SKILL.md, /repo/scratchpad/SKILL.md and 3 more · reported by cisco-skill-scanner
4 YARA_command_injection_generic
Artifact contains critical command injection and taint vulnerabilities.
The artifact exhibits critical command injection vulnerabilities in `/repo/.claude/hooks/validate-readonly/src/main.rs`, allowing for shell execution. Multiple critical taint vulnerabilities are present in `rustc-lang-facade/src/lib.rs`, `toylangc/src/build.rs`, and `toylangc/src/stub_gen.rs`, indicating potential for untrusted input to influence sensitive operations. Additionally, a critical coercive injection finding in `/repo/SKILL.md` and high-severity execution patterns in `/repo/SKILL.md` warrant attention.
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.
Files: /repo/.claude/hooks/validate-readonly/src/main.rs · reported by cisco-skill-scanner
2 AAK-TAINT-001
Files: toylangc/src/build.rs · reported by agent-audit-kit
2 opt.nerlo-rules.nerlo-install-run-bundled-artifact
Files: /repo/handoff.md, /repo/rust-interop-architecture.md · reported by nerlo-install-instruction
1 COMPOUND_EXTRACT_EXECUTE
Files: /repo/maintainers-guide.md · reported by cisco-skill-scanner
1 EXCESSIVE_FILE_COUNT
Files: /repo/. · reported by cisco-skill-scanner
1 hooks-no-stop-hooks
Files: settings.json · reported by agentshield
1 MANIFEST_INVALID_NAME
Files: /repo/vendor/inkwell/internal_macros/SKILL.md · reported by cisco-skill-scanner
1 permissions-no-block
Files: settings.json · reported by agentshield
1 YARA_coercive_injection_generic
Files: /repo/SKILL.md · reported by cisco-skill-scanner