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How to use CrystalJson, the custom JSON library in SnowBank.Core (namespace SnowBank.Data.Json). Covers the JsonValue DOM (JsonObject / JsonArray / JsonString / JsonNumber / JsonBoolean / JsonNull / JsonDateTime), the read-only vs mutable model, the CrystalJson static API (Serialize / Parse / Deserialize) and CrystalJsonSettings, the Roslyn source generator for fast reflection-free serializers and read-only/writable proxies ([CrystalJsonConverter] / [CrystalSerializable]), the IJsonSerializable / IJsonPackable / IJsonDeserializable interfaces, MutableJsonValue / ObservableJsonValue and JsonPath. Use whenever code parses, builds, reads, mutates, or serializes JSON with these types, reads optional fields with defaults, declares a generated JSON converter/proxy, or implements custom JSON (de)serialization. Use it even when the request only says "serializer", "converter", or "serialize/deserialize a record, document, or model" without naming JSON: in SnowBank-based code (document stores, sync layers, Layers, models) document and message (de)serialization goes through CrystalJson, not System.Text.Json or Newtonsoft.
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.
2 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/snowbanksdk/foundationdb-dotnet-client, 132 findings
Claude Skills install to a single target, no runtime picker.
nerlo install -- 'snowbanksdk/foundationdb-dotnet-client (crystaljson)'
Manual alternative: copy the skill folder into ~/.claude/skills/ so Claude Code loads it on next launch.
cp -r -- 'snowbanksdk/foundationdb-dotnet-client (crystaljson)' ~/.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 · 0.5s
v2.0.11
126 findings · 17.5s
v0.3.74
6 findings · 9.7s
v0.1.0
0 findings · 4.3s
v0.1.0
0 findings · 4.3s
v0.1.0
0 findings · 15.1s
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 17, 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.
This review has not run for this scan yet. It runs once per scan, in the background, and is kept; it appears here when it has. Until then all 132 findings above stand exactly as their scanners reported them, at full severity.