zod SKILL.md skillA

zod from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add secondsky/claude-skills/zod@v2.1.0

Pins v2.1.0 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
secondsky/claude-skills
Path
plugins/zod/skills/zod/SKILL.md
Versions recorded
5
Latest version
v2.1.0, committed Aug 20, 2026
First version recorded
Dec 24, 2025
Size
28,043 bytes
Repository stars
243
License
MIT

TypeScript-first schema validation and type inference. Use for validating API requests/responses, form data, env vars, configs, defining type-safe schemas with runtime validation, transforming data, generating JSON Schema for OpenAPI/AI, or encountering missing validation errors, type inference issues, validation error handling problems. Zero dependencies, compact core (~5kb gzipped; zod/mini ~1.9kb).

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Zod: TypeScript-First Schema Validation

## Overview

Zod is a TypeScript-first validation library that enables developers to define schemas for validating data at runtime while automatically inferring static TypeScript types. With zero dependencies and a compact core (~5kb gzipped; ~1.9kb for `zod/mini`), Zod provides immutable, composable validation with comprehensive error handling.

## Installation

```bash
bun add zod
# or
npm install zod
# or
pnpm add zod
# or
yarn add zod
```

**Requirements**:
- TypeScript v5.5+ with `"strict": true` in `tsconfig.json`
- Zod 4.x (4.4.x recommended; `z.codec()` requires 4.1+)

**Important**: This skill documents **Zod 4.x** features. The following APIs require Zod 4 and are NOT available in Zod 3.x:
- `z.codec()` - Bidirectional transformations
- `z.iso.date()`, `z.iso.time()`, `z.iso.datetime()`, `z.iso.duration()` - ISO format validators
- `z.toJSONSchema()` - JSON Schema generation
- `z.treeifyError()`, `z.prettifyError()`, `z.flattenError()` - New error formatting helpers
- `.meta()` - Enhanced metadata (Zod 3.x only has `.describe()`)
- Unified `error` parameter - Replaces `message`, `invalid_type_error`, `required_error`, `errorMap`
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add secondsky/claude-skills/zod@sha256:0e8f91608537b12e

The line at the top of this page pins the label v2.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_us4ljf3topj6cecs.svg)](https://markdownregistry.com/a/art_us4ljf3topj6cecs)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Dec 24, 2025 and Aug 20, 2026, about one every 60 days.

versioncommittedcommitsizeaudit
v2.1.0 latest2026-08-20 ad16332 28,043 BA view · diff
v2.0.02026-08-03 ccebcfa 22,953 BA view · diff
v2.0.02026-06-21 bfdac85 23,008 BA view · diff
v2.0.02025-12-25 b977ea9 23,029 BA view · diff
v2.0.02025-12-24 ba827ce 23,430 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (28043 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

secondsky/claude-skills · 243 stars · license MIT · pushed 2026-10-31 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_us4ljf3topj6cecs
GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/zod
GET https://markdownregistry.com/api/v1/blob/0e8f91608537b12e947f03a52704247dc116cbb4c1864fda018dd7ca3710b8d4

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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