@json-schema-engine/compiler

Compiler tier for JSON Schema: turns a schema registered with @json-schema-engine/core into a specialized validator, trampolining to the interpreter for the dynamic islands it cannot emit statically. Add this package once interpreted evaluation shows up in a profile — a compiled artifact is exactly as correct as Engine.evaluate and never less complete, so switching tiers is a performance decision, not a semantic one. Needs @json-schema-engine/core installed alongside.

Install

npm install @json-schema-engine/compiler @json-schema-engine/core

Example

import assert from "node:assert";
import { createEngine } from "@json-schema-engine/core";
import { compileValidator, compileList } from "@json-schema-engine/compiler";

const engine = createEngine();
const uri = engine.registerSchema(
  { properties: { name: { type: "string", minLength: 1 } } },
  "https://example.com/named",
);

const flag = compileValidator(engine, uri);
assert.equal(flag.validate({ name: "" }), false);
assert.equal(flag.validate({ name: "ok" }), true);

const list = compileList(engine, uri);
const result = list.evaluateList({ name: "" });
assert.equal(result.valid, false);
assert.equal(result.errors[0]?.inputLocation, "/name");

Status

Version 0.0.1 is published for initial public feedback on both the functionality and the documentation. APIs may change before 1.0. STATUS.md is the authoritative statement of what is built and what is staged.

Documentation

• User guide
• Compiling schemas
• Conformance
• Repository

License

MIT