zod

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).

1.46x

Quality

80%

Does it follow best practices?

Impact

91%

1.46x

Average score across 3 eval scenarios

Securityby

Passed

No findings from the security scan

Evaluation results

85%

43%

Article API Client Module

Bidirectional codec transforms and JSON Schema generation

Criteria

Without this skill

With this skill

Bidirectional codec

100%

ISO datetime in codec

53%

100%

JSON Schema generation

80%

100%

Field metadata via .meta()

30%

100%

Type derived with z.infer

100%

Top-level UUID validator

100%

z.unknown() for metadata

40%

Codec encode direction

100%

Safe parse of untrusted input

Named Zod import

100%

88%

38%

Notification Schema Library for Multi-Channel Delivery Platform

Zod v4 schema composition and discriminated union for notifications

Criteria

Without this skill

With this skill

Schema composition via extend

100%

Discriminated union for event types

100%

Top-level z.uuid()

100%

Top-level z.iso.datetime()

100%

z.record() with two arguments

100%

z.treeifyError() for error formatting

100%

Optional chaining on treeifyError result

100%

z.function() config style

Type derivation via z.infer

100%

z.unknown() not z.any()

100%

User Registration Validator

Zod v4 HTTP request validation with safeParse and flattenError

Criteria

Without this skill

With this skill

safeParse for request body

100%

Top-level email validator

100%

flattenError for field errors

100%

Schema constant exported

100%

z.infer type derivation

100%

Module-level schema definition

100%

Unified error parameter

100%

z.unknown for preferences field

100%

parse() for env config

100%

Named import syntax

100%

Repository: secondsky/claude-skills
Path: plugins/zod/skills/zod/SKILL.md
Commit: a0994f7

Evaluated: 20 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

User Registration Validator Notification Schema Library for Multi-Channel Delivery Platform Article API Client Module

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