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 skills add xonovex/platform --skill zod-guidegit clone --depth 1 https://github.com/xonovex/platformWrote 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/xonovex/platform/zod-guide)<a href="https://agentmods.dev/skills/xonovex/platform/zod-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/zod-guide/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/xonovex/platform/zod-guide"><img src="https://agentmods.dev/badge/skills/xonovex/platform/zod-guide.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00087 | $0.00454 |
| Opus 5.5 | $0.00035 | $0.00182 |
| Sonnet 5.5 | $0.00017 | $0.00091 |
| Haiku 4.5 | $0.00009 | $0.00045 |
Grade A, and why
zod-guide 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 21d 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
Zod Coding Guidelines
Validate external data with Zod schemas and derive application types from the validated shape.
Requirements
- Zod ≥ 4.0
Essentials
- Use v4 validators -
z.uuid(),z.email(),z.iso.datetime()(notz.string().uuid()), see references/migration-v4.md - Name schemas PascalCase - e.g.
UserSchema, see references/schema-organization.md - Module-level schemas - Define for reuse, keep close to usage, see references/schema-organization.md
- Multi-step validation - Chain
.transform()into.pipe()before.default(), see references/validation-patterns.md
Gotchas
optional()makes a field acceptundefined;nullable()acceptsnull. They're orthogonal, combine with.nullish()for both- Refinements (
.refine) don't narrow the output type: TypeScript still sees the broader input type unless you pair with.transform
Progressive Disclosure
Guidelines
- Read references/schema-organization.md - Load when naming or placing schemas across modules or files
- Read references/validation-patterns.md - Load when composing multi-step validation with
.transform()and.pipe()
Migration from Zod v3
- Read references/migration-v4.md - Load when migrating from Zod v3, replacing z.string().uuid() patterns, or using deprecated validators
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 21d ago Changed · +2 lines 8b9fbf0a779c
- 1mo ago First seen · 34 lines · 87 tokens per session scan A b32487570609
zod-guide is a skill published in the GitHub repository xonovex/platform (6 stars, last pushed 5d ago), licensed MIT. It adds 87 tokens to every session and 454 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-08.
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