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export function positiveIntegerEnv(value: string | undefined, fallback: number): number {
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  const parsed = Number.parseInt(value || String(fallback), 10);
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  return Number.isFinite(parsed) && parsed > 0 ? parsed : fallback;
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}
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export function maxXmlBodyBytes(env: Env): number {
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  return positiveIntegerEnv(env.MAX_XML_BODY_BYTES, 1_048_576);
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}
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export function maxReportResults(env: Env): number {
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  return positiveIntegerEnv(env.MAX_REPORT_RESULTS, 5_000);
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}
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export function maxFileBytes(env: Env): number {
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  return positiveIntegerEnv(env.MAX_FILE_BYTES, 100_000_000);
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}
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export function maxDavDepthInfinityNodes(env: Env): number {
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  return positiveIntegerEnv(env.MAX_DAV_DEPTH_INFINITY_NODES, 10_000);
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}
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export function maxCalendarObjectBytes(env: Env): number {
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  return positiveIntegerEnv(env.MAX_CALENDAR_OBJECT_BYTES, 1_048_576);
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}
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export function maxAddressObjectBytes(env: Env): number {
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  return positiveIntegerEnv(env.MAX_ADDRESS_OBJECT_BYTES, 1_048_576);
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}
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export function maxRecurrenceYears(env: Env): number {
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  return positiveIntegerEnv(env.MAX_RECURRENCE_YEARS, 5);
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}
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export function maxRecurrenceInstances(env: Env): number {
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  return positiveIntegerEnv(env.MAX_RECURRENCE_INSTANCES, 10_000);
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}