Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/koatora20/guard-scanner/json-validatornpx skills add koatora20/guard-scanner --skill json-validatorgit clone --depth 1 https://github.com/koatora20/guard-scannerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/koatora20/guard-scanner/json-validator)<a href="https://agentmods.dev/skills/koatora20/guard-scanner/json-validator"><img src="https://agentmods.dev/badge/skills/koatora20/guard-scanner/json-validator.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.00163 |
| Opus 5 | $0.00000 | $0.00081 |
| Sonnet 5 | $0.00000 | $0.00033 |
| Haiku 4.5 | $0.00000 | $0.00016 |
Grade A, and why
json-validator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
JSON Schema Validator
Validates JSON data against JSON Schema definitions.
function validate(data, schema) {
const errors = [];
if (schema.type && typeof data !== schema.type) {
errors.push(`Expected ${schema.type}, got ${typeof data}`);
}
if (schema.required && Array.isArray(schema.required)) {
for (const key of schema.required) {
if (!(key in data)) errors.push(`Missing required: ${key}`);
}
}
if (schema.properties) {
for (const [key, subSchema] of Object.entries(schema.properties)) {
if (key in data) {
errors.push(...validate(data[key], subSchema));
}
}
}
return errors;
}
module.exports = { validate };
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 28 lines · 0 tokens per session scan A 201cecae1d53
json-validator is a skill published in the GitHub repository koatora20/guard-scanner (2 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 163 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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