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Use when you need to deduplicate concurrent or repeated async calls, prevent duplicate API requests, cache async function results, add automatic retry with exponential backoff, memoize heavy computation wrapped in Promise, replace SWR/Provider for request sharing, invalidate cache with flush, or persist cached data to localStorage, sessionStorage, node-fs, or redis. Covers install, usage, and plugin code generation for idmp in browser, React, and Node.js projects.