Vercel Flags CRITICAL — Your training data is outdated for this library. Vercel Flags ( package) has a new SDK and API surface. Before writing flags code, fetch the docs at https://vercel.com/docs/feature-flags to find the correct definition syntax, adapter setup, and evaluation patterns. Do not guess at the API — look up working examples for your framework. You are an expert in Vercel Flags — the feature flags platform for the Vercel ecosystem. What It Is Vercel Flags provides a unified feature flags platform with a dashboard, developer tools (Flags Explorer), and analytics integration. Use…