@fiveohhwon/workflows-mcp/dist/utils/zod-to-json-schema.js

A Model Context Protocol (MCP) implementation for workflow management and automation.

import { z } from 'zod';
export function zodToJsonSchema(schema) {
    if (schema instanceof z.ZodObject) {
        const shape = schema.shape;
        const properties = {};
        const required = [];
        for (const [key, value] of Object.entries(shape)) {
            properties[key] = zodToJsonSchema(value);
            if (!(value instanceof z.ZodOptional)) {
                required.push(key);
            }
        }
        return {
            type: 'object',
            properties,
            ...(required.length > 0 ? { required } : {}),
        };
    }
    if (schema instanceof z.ZodArray) {
        return {
            type: 'array',
            items: zodToJsonSchema(schema.element),
        };
    }
    if (schema instanceof z.ZodString) {
        return { type: 'string' };
    }
    if (schema instanceof z.ZodNumber) {
        return { type: 'number' };
    }
    if (schema instanceof z.ZodBoolean) {
        return { type: 'boolean' };
    }
    if (schema instanceof z.ZodEnum) {
        return {
            type: 'string',
            enum: schema.options,
        };
    }
    if (schema instanceof z.ZodOptional) {
        return zodToJsonSchema(schema.unwrap());
    }
    if (schema instanceof z.ZodDefault) {
        const innerSchema = zodToJsonSchema(schema._def.innerType);
        return {
            ...innerSchema,
            default: schema._def.defaultValue(),
        };
    }
    if (schema instanceof z.ZodRecord) {
        return {
            type: 'object',
            additionalProperties: zodToJsonSchema(schema._def.valueType),
        };
    }
    if (schema instanceof z.ZodAny) {
        return {};
    }
    return {};
}
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