Can I code LaunchDarkly?

COPYDon't build a distributed feature-flag service — check flags directly from your own config, which is genuinely sufficient at personal-project scale: 1. A flags table in your own database (name, boolean value, optionally a percentage for gradual rollout) — a simple config lookup, not a service. 2. Check the flag value directly in your code where you'd otherwise hard-code behavior — a single database read, cached in memory if you want to avoid a query per request. 3. A simple admin page to toggle flags manually. That's real, working feature flagging for a small project. Out of scope: low-latency flag evaluation at real production traffic with instant global propagation when a flag changes — a genuine distributed-systems problem, precisely what a dedicated service exists to solve — and consistent user bucketing for percentage rollouts, which needs careful, correct hashing logic to get right.