pi-schema: opt-in coercion, compile(schema, { coerce: true }) with coerce() and
parse(), the superset of TypeBox's Value.Convert rules and pi-ai's old coercion;
unresolvedRefs option; url and json-pointer-uri-fragment formats.
pi-ai: Tool takes any JSON Schema; validation through pi-schema; Type, Static
and TSchema are no longer exported (breaking). pi-agent-core and pi-durable:
tools on pi-schema, no TypeBox dependency. Coding agent: extensions keep Type,
Static, TSchema and StringEnum through an extension view of pi-ai; built-in
tools stay on TypeBox.
- Declared-object checks walk the value's own keys with for...in, whose
property reads V8 serves from the enum cache, instead of reading each
declared name from a list: nested Chord-style arguments 535 -> 409 ns
(TypeBox 474), recursive $ref schemas 1.1 us -> 753 ns.
- Schemas are indexed for references only on the first $ref; base URIs are
derived from $id while compiling. Compiling a new schema 43 -> 21 us.
- Drop the keyed cache of leaf checks: on distinct schemas its entries cost
more than sharing saved. Bare types still share module-level checks and
patterns share their RegExp. 3,200 distinct schemas 7.9 -> 7.1 MB
(cfworker 7.6 MB).
@earendil-works/pi-schema compiles JSON Schema (drafts 2020-12 and 7) once into
plain closures: no eval or new Function, so it runs under a strict CSP. It
passes 2,222 of the 2,223 core tests of the official JSON-Schema-Test-Suite,
checks Chord-style argument schemas within 1.2x of TypeBox's JIT, and keeps
3,200 compiled schemas in 7.9 MB (TypeBox: 54.7 MB).
- compile(schema, options) returns a Validator: check() is the boolean check
(a type guard for builder schemas), errors() reports each failure with a
JSON Pointer path, missing and unknown fields at the field.
- Builders (str, int, obj, opt, union, ...) return plain JSON Schema typed with
the values it accepts (Static<typeof schema>).
- Formats are an optional entry point (./formats), adapted from TypeBox (MIT).
- Tests run the vendored suite (drafts 2020-12 and 7, with optional and format
tests); npm run bench compares conformance, speed, setup cost, memory and
bundle size with TypeBox, @cfworker/json-schema and omptype.
