@samchon/openapi/src/functional/_isFormatDuration.ts

Universal OpenAPI to LLM function calling schemas. Transform any Swagger/OpenAPI document into type-safe schemas for OpenAI, Claude, Qwen, and more.

export const _isFormatDuration = (str: string): boolean => PATTERN.test(str);

const PATTERN =
  /^P(?!$)((\d+Y)?(\d+M)?(\d+D)?(T(?=\d)(\d+H)?(\d+M)?(\d+S)?)?|(\d+W)?)$/;