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.
git clone --depth 1 https://github.com/jahands/promptsWrote 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/rules/jahands/prompts/zod-v4)<a href="https://agentmods.dev/rules/jahands/prompts/zod-v4"><img src="https://agentmods.dev/badge/rules/jahands/prompts/zod-v4.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 5.1 | $0.00014 | $0.01226 |
| Opus 5 | $0.00007 | $0.00613 |
| Sonnet 5 | $0.00003 | $0.00245 |
| Haiku 4.5 | $0.00001 | $0.00123 |
Grade A, and why
zod-v4 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 176 lines — stays where its author put it; the contents beside it link to each section on GitHub.
| v3 | v4 |
|---|---|
| z.string().email() | z.email() |
| {message: "err"} | {error: "err"} |
| .strict() | z.strictObject() |
| .format() | z.treeifyError() |
| z.string().datetime() | z.iso.datetime() |
| .args().returns() | {input:[...], output:...} |
| .superRefine() | .check() |
| ctx.addIssue() | ctx.issues.push() |
| z.ZodIssueCode.custom | 'custom' |
/** User registration */ export type UserReg = z.infer export const UserReg = z.object({ email: z.email(), password: z .string() .min(8) .refine((pwd) => /[A-Z]/.test(pwd) && /\d/.test(pwd), { error: 'Need uppercase & number' }), age: z.number().min(18), })
/** Function with input/output types */ export type ProcessUser = z.infer export const ProcessUser = z.function({ input: [UserReg], output: z.object({ id: z.string(), createdAt: z.iso.datetime(), }), })
</complete-example>
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.
- 7d ago First seen · 176 lines · 14 tokens per session scan A e7670fc8b502
zod-v4 is a cursor rule published in the GitHub repository jahands/prompts (19 stars, last pushed 7mo ago), licensed MIT. It adds 14 tokens to every session and 1,226 once invoked, about $0.0001 per session on Opus 5. 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 2026-08-30.
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