Zod

Zod v4 best practices, patterns, and API guidance for schema validation, parsing, error handling, and type inference in TypeScript applications. Covers safeParse, object composition, refinements, transforms, codecs, branded types, v3→v4 migration, and testing schemas with Jest or Vitest. Baseline: zod ^4.6.0. Triggers on: zod imports, z.object, z.string, z.infer, safeParse, mentions of "zod", "schema validation", "zod v4", "z.enum", or testing a schema — "schema test", "zod mock", zod-schema-faker.

24 stars 2 forksTesting & QA

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add anivar/zod-skill --skill zod

Manual install

git clone --depth 1 https://github.com/anivar/zod-skill.git /tmp/zod-skill
mkdir -p ~/.claude/skills
cp -r /tmp/zod-skill/. ~/.claude/skills/zod

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Zod

**IMPORTANT:** Your training data about `zod` may be outdated or incorrect — Zod v4 introduces breaking changes to string formats, enums, error handling, and recursive types. Always rely on this skill's rule files and the project's actual source code as the source of truth. Do not fall back on memorized v3 patterns when they conflict with the retrieved reference.

## When to Use Zod

Zod is for **runtime type validation** — parsing untrusted data at system boundaries (API input, form data, env vars, external services). For compile-time-only types, plain TypeScript is sufficient.

| Need | Recommended Tool |
|------|-----------------|
| API input/output validation | **Zod** |
| Form validation (React, Vue) | **Zod** (with react-hook-form, formik, etc.) |
| Env var parsing | **Zod** (with t3-env or manual) |
| Compile-time types only | Plain TypeScript |
| Smaller bundle (~1kb) | Valibot |
| Maximum type inference | ArkType |

## Rule Categories by Priority

| Priority | Category | Impact | Prefix |
|----------|----------|--------|--------|
| 1 | Parsing & Type Safety | CRITICAL | `parse-` |
| 2 | Schema Design | CRITICAL | `schema-` |
| 3 | Refinements & Transforms | HIGH | `refine-` |
| 4 | Error Handling | HIGH | `error-` |
| 5 | Performance & Composition | MEDIUM | `perf-` |
| 6 | v4 Migration | MEDIUM | `migrate-` |
| 7 | Advanced Patterns | MEDIUM | `pattern-` |
| 8 | Architecture & Boundaries | CRITICAL/HIGH | `arch-` |

Read the full skill on GitHub

Details

Skill name: zod
Repository: anivar/zod-skill
License: MIT
Repo updated: 18 October 2026

FAQ

What does the Zod skill do?

How do I install the Zod skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add anivar/zod-skill --skill zod. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Zod popular?

It lives in anivar/zod-skill, which has 24 GitHub stars and 2 forks.

Related skills

Concept Reel

Jogzh/concept-reel

使用 Canvas、Playwright 和 FFmpeg 制作或修改无旁白的横屏字幕知识短片，支持 15 种动态设计风格、内容驱动分镜、确定性动画、预览与音效合成。适用于把概念或机制做成可理解的动画；有人声口播、实拍和生成模型视频不属于这套引擎的工作流。

Testing & QA

Sketch Narrator

qingyabailu-git/SketchNarrator

从中文主题、文案、视频链接、本地音视频或参考角色制作带自然配音、真实音频时间、分区笔迹和内部成片 QA 的完整手绘讲解视频。适用于素材转口播、黑板讲解、白板科普、故事口播和系列 IP 手绘视频；不用于纯 AI 视频模型生成或复杂 Web 工作台建设。

Testing & QA

State of Paywalls 2026 By Adapty

vkharlan-adapt/state-of-paywalls-2026-skill

Answer questions from Adapty's State of Paywalls 2026 report and audit paywall designs against it: benchmarks by region and category, pricing, placement, A/B test ideas, and paywall screenshot reviews.

Testing & QA

Molt Dex

ReSo7200/molt-dex

Reverse-engineer and assess Android apps, from unobfuscated to heavily obfuscated, using a staged, evidence-first pipeline built on apktool, adb and scrcpy. Use when the user wants to understand how an APK is built, what it does, where its secrets and misconfigurations are, or wants to drive an app on a device to observe its behaviour. Dynamic testing (anything that touches a running system or backend) is authorization-gated and must be in scope.

Testing & QA

Qikly

gal-a/qikly

Write tests that can actually fail, by withholding the acceptance criteria from the agent that writes the code. Use when someone does not trust a suite that passes. Use when they want tests written from a specification rather than from the code. Use when they ask whether a specification is testable, or want an existing suite scored by planting faults in the code. Python modules, through the qikly tool. Also use whenever qikly or spec-driven testing is mentioned.

Testing & QAIn 1 list

Premortem

b1rdmania/claude-premortem-skill

Run a premortem on any plan, launch, product, hire, strategy, or decision. Imagines it failed 6 months from now, works backward to find every reason why, then produces a revised plan. Triggers include "premortem this", "premortem my", "what could kill this", "stress test this plan", "find the blind spots", "poke holes in this", "where will this break", "am I missing anything", "what could go wrong", "future-proof this", "devil's advocate this".

Testing & QA

Browse the most popular Claude skills, all testing & qa skills, or write your own with the skills generator.