Implement feature flags in Next.js or SvelteKit code with the Flags SDK (`flags` npm package). Use when installing or configuring the SDK, declaring flags with `flag()`, wiring a provider adapter (`@flags-sdk/vercel`, Statsig, LaunchDarkly, PostHog, GrowthBook, Global Config, OpenFeature, and others), using `identify`, `dedupe`, or `evaluate`, keeping pages static with precompute, setting up…
Install
npx skills add vercel/vercel-plugin --skill flags-sdknpx skills add vercel/vercel-plugin --skill flags-sdk -a claude-code -gnpx skills add vercel/vercel-plugin --skill flags-sdk -a codex -ggemini skills install https://github.com/vercel/vercel-plugin.git --path skills/flags-sdkgh skill install vercel/vercel-plugin flags-sdkgit clone --depth 1 https://github.com/vercel/vercel-plugin /tmp/vercel__vercel-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/vercel__vercel-plugin/skills/flags-sdk ~/.claude/skills/flags-sdk # Claude Code
cp -R /tmp/vercel__vercel-plugin/skills/flags-sdk ~/.agents/skills/flags-sdk # Codex, Cursor, Gemini CLI, Copilot, OpenCode