Flags Sdk

Teaches Claude how to set up and work with the Flags SDK, a feature flags toolkit for Next.js and SvelteKit that treats flags as callable functions instead of string keys. The skill includes detailed workflows for creating flags end-to-end with Vercel Flags (including CLI commands like `vercel flags add` and env var setup), integrating third-party providers through adapters (Statsig, LaunchDarkly, PostHog), and implementing the precompute pattern to keep pages static. What makes this useful is the step-by-step agent workflow that checks project state first, then runs the actual commands rather than leaving them as next steps. Covers both App Router and Pages Router in Next.js, plus SvelteKit integration and the Vercel Toolbar setup.

Install to Claude Code

npx -y skills add vercel/flags --skill flags-sdk --agent claude-code