Convert a Zod schema string to JSON Schema for LLM understanding. Use to answer: what is the structure and constraints of this schema?

Read a Zod schema directly from a TypeScript or JavaScript file. Use to answer: what schema is defined in this file?

Generate valid mock data from a Zod schema string. Use to answer: what does a valid payload for this schema look like?

Generate intentionally invalid payloads based on a Zod schema — for negative testing. Use to answer: what invalid inputs should I test against this API?

Generate violation payloads for every branch of a z.union() or z.discriminatedUnion() schema. Use when generate_boundary_violations only covers one union variant and you need full branch coverage.

Generate N structurally valid but value-diverse mocks from a Zod schema — for property-based testing. Use when generate_valid_mock is too deterministic and you need varied inputs to surface edge cases. Supply seed for reproducible output in CI.

Generate an API contract test or mock boilerplate for Playwright, Jest, Vitest, or MSW. Use to answer: how do I write a test that validates this API endpoint against this schema?

Validate a JSON payload against a Zod schema and suggest fixes for each violation. Use to answer: why does this payload fail validation, and how do I fix it?

Compare a Zod schema in a TypeScript file against an OpenAPI spec — finds silent divergence. Use when Zod and OpenAPI docs are maintained separately and may have drifted apart. Reports missing fields, extra fields, type conflicts, and required/optional mismatches.

Detect breaking changes when a Zod schema is tightened — before tests run. Generates mocks from the old schema, validates them against the new schema, and reports exactly which fields and constraints now reject previously valid data. Use when you changed a schema and want to know if existing test fixtures will break.