Crate ferrin_schema 

Ferrin JSON Schema support.

• Schema: a JSON Schema plus a typed validation function, created from a Rust type (schemars derive + serde deserialization), from a raw JSON Schema (validated with jsonschema when the json-schema-validation feature is enabled) or from a custom validator.
• SchemaDialect: draft-07 (default) or 2020-12 generation settings.
• SchemaTransform: provider-oriented schema rewrites (additionalProperties: false, OpenAI strict mode).
• partial_json: repair and parse truncated JSON produced by streaming models.
• json: JSON parsing with size and depth limits.

Design: docs/01-architecture/08-structured-output.md, ADR 0004.

Attribution

Portions of this crate are derived from the Vercel AI SDK (Apache-2.0, Copyright 2023 Vercel, Inc.), translated from TypeScript to Rust and modified. See the NOTICE file in the crate root.

Re-exports

pub use dialect::SchemaDialect;

pub use json::ParseLimits;

pub use partial_json::PartialParse;

pub use partial_json::PartialParseState;

pub use schema::Schema;

pub use transform::SchemaTransform;

pub use validation::ValidationIssue;

pub use validation::ValidationIssues;

pub use schemars;

Modules

dialect

JSON Schema dialects used for generation.

json

JSON parsing with resource limits.

partial_json

Repair and parse truncated JSON.

schema

The Schema abstraction: a JSON Schema plus a typed validator.

transform

Provider-oriented JSON Schema rewrites.

validation

Dynamic JSON Schema validation.

Structs

JsonParseError

Text could not be parsed as JSON.

TypeValidationContext

Where a validated value came from, for error messages.

TypeValidationError

A value failed schema or type validation.

Enums

SchemaError

Errors produced while parsing or validating JSON against a schema.

Traits

JsonSchema

A type which can be described as a JSON Schema document.

Derive Macros

JsonSchema

Derive macro for JsonSchema trait.