$ ls -la ./notes
Notes.
Things I learned the slow way, written down so you can learn them the fast way.
2026-09-20A hardened HTTP client for flaky providersRetries that respect Retry-After, never retry a 4xx, idempotency keys per step, and a circuit breaker — the rules I now put in front of every vendor.2 min2026-09-02Server-driven KYC flows with a state machineWhy the client should never decide what step comes next, and how one buildPlan() function keeps personal and business verification from drifting apart.2 min2026-08-10Turning a React Native app into a mini-app shellAn AppRegistry, reducers injected at runtime and a tiny event bus — how Kwikpik's delivery app became a home for finance, bills and dispatch without becoming a monolith.2 min