Practical articles on AI, DevOps, Cloud, Linux, and infrastructure engineering.
We used to ship code and turn it on in the same breath, so every deploy was a bet. Feature flags split those two events apart and made rollbacks a config toggle.
How we cut auth redirect latency to single-digit milliseconds and ran A/B tests without a flash of wrong content, using Vercel Edge Middleware.
We use feature flags on roughly every customer-facing change. The provider tradeoff, the patterns that hold up, and the failure modes that show up only after a couple of years.
