The Remote Config keys you add after your release path closes are invisible to the build already on devices
A record of recounting what I can still change remotely before my release path closes. A key you add in the console does nothing unless a build that reads it is already on devices. Which switches to ship in the last build, and a shared-defaults bug I measured.
Every Experiment Kept Landing on the Same Devices: Hash Choice and Salt Position, Measured Across a Million IDs
On-device experiment assignment looked fine in isolation, then collapsed the moment two experiments ran side by side. Here is what one million IDs revealed about four hash functions, why the culprit was the concatenation order rather than hash quality, and the implementation I settled on, with the measured numbers.
Before Your Feature Flags Turn Into a Junkyard — Governing Naming, Staged Rollout, and Kill Switches Across Six Apps
Keep adding remote-config flags and within six months you have keys nobody remembers the meaning of. Here is a governance system — naming conventions, safe defaults, staged rollout, kill switches, and monthly cleanup — with the implementation from running six apps in parallel.
Building a Rork A/B Testing Platform with GrowthBook and PostHog from Scratch
Drop Firebase and pair GrowthBook with PostHog to ship a production-grade A/B testing stack for your Rork apps. SDK wiring, edge evaluation on Cloudflare Workers, Bayesian statistics interpretation, and the operational pitfalls I learned the hard way.
Making Feature Flags Survive Production: Kill Switches and Gradual Rollouts in Rork Max
Wire Firebase Remote Config into a Rork Max app, then harden it: kill switches that work offline, stable bucket assignment for gradual rollouts, and a registry that keeps flags from turning into debt.