Zod Skill

Created by Anivar Aravind

An AI agent skill for writing, validating, and debugging Zod v4 schemas with modern best practices.

The Problem

AI agents often generate outdated Zod v3 patterns — z.string().email() instead of z.email(), z.nativeEnum() instead of z.enum(), required_error instead of the error parameter — and miss critical parsing pitfalls like using parse() instead of safeParse(), forgetting parseAsync for async refinements, or assuming z.object() preserves unknown keys. These produce schemas that compile but silently misbehave at runtime.

This Solution

27 rules with incorrect→correct code examples that teach agents Zod v4's actual API behavior, schema design patterns, error handling, architectural placement, observability, and TypeScript integration. Each rule targets a specific mistake and shows exactly how to fix it.

Install

npx skills add anivar/zod-skill -g

Or with full URL:

npx skills add https://github.com/anivar/zod-skill

Baseline

• zod ^4.0.0
• TypeScript ^5.5

What's Inside

27 Rules Across 9 Categories

Each rule file contains:

• Why it matters
• Incorrect code with explanation
• Correct code with explanation
• Decision tables and additional context

9 Deep-Dive References

Structure

├── SKILL.md                          # Entry point for AI agents
├── AGENTS.md                         # Compiled guide with all rules expanded
├── rules/                            # Individual rules (Incorrect→Correct)
│   ├── parse-*                       # Parsing & type safety (CRITICAL)
│   ├── schema-*                      # Schema design (CRITICAL)
│   ├── refine-*                      # Refinements & transforms (HIGH)
│   ├── error-*                       # Error handling (HIGH)
│   ├── perf-*                        # Performance & composition (MEDIUM)
│   ├── migrate-*                     # v4 migration (MEDIUM)
│   ├── pattern-*                     # Advanced patterns (MEDIUM)
│   ├── arch-*                        # Architecture & boundaries (CRITICAL/HIGH)
│   └── observe-*                     # Observability (HIGH/MEDIUM)
└── references/                       # Deep-dive reference docs
    ├── schema-types.md
    ├── parsing-and-inference.md
    ├── objects-and-composition.md
    ├── refinements-and-transforms.md
    ├── error-handling.md
    ├── advanced-features.md
    ├── anti-patterns.md
    ├── boundary-architecture.md
    └── linter-and-ci.md

Ecosystem — Skills by Anivar Aravind

Testing Skills

Library & Framework Skills

Engineering Analysis

Author

Anivar Aravind — Building AI agent skills for modern JavaScript/TypeScript development.

License

MIT