Full-stack feature flag system with Firestore backend, plan-aware targeting (Free/Pro/Enterprise), and stale-while-revalidate caching across SDK, server, and website
`FeatureFlagManager` class in SDK for synchronous `isEnabled()` checks
`<FeatureFlag>` React server component for conditional rendering
`GET /v1/flags` and `GET /v1/flags/:name` API endpoints
`requireFlag()` middleware for gating server routes behind feature flags
CI/CD pipelines: test/build on push, Cloud Run deploy, Vercel deploy
Renovate for automated dependency management
Changelog tracking (public + internal)
Fixed
Stripe test mock using arrow function instead of constructor function