usageEventSchema (schemas/validation.ts)

Zod schemas for validating usage events, queries, and adjustment requests in a metering API.

// Source: https://github.com/geminimir/meterguard | License: MIT | Copyright 2025 StripeMeter Contributors
// Provided via justclaw.it.com; keep this notice with the code.
/**
 * Zod validation schemas for API requests
 */

import { z } from 'zod';

// ISO 8601 date-time validation
const isoDateTimeSchema = z.string().refine(
  (val) => !isNaN(Date.parse(val)),
  { message: 'Invalid ISO 8601 date-time format' }
);

// TenantId: relax from UUID to string for DX; still allow UUIDs but don't require
const tenantIdSchema = (() => {
  const strict = process.env.STRICT_TENANT_ID_UUID === 'true';
  return strict ? z.string().uuid() : z.string().min(1);
})();

// Usage event schema
export const usageEventSchema = z.object({
  tenantId: tenantIdSchema,
  metric: z.string().min(1).max(100),
  custo

... (truncated -- full source via MCP)