Guides

Feature flags, from the basics to advanced.

Short, practical guides on using feature flags well — start at the beginning or jump to the practice you need.

Basics

What are feature flags?

A plain-English introduction to feature flags and why backend teams reach for them.

The smallest useful integration: one flag, one environment, one call site.

Practices

Merge to main continuously and choose when each feature actually goes live.

Expose a feature to 1%, then 10%, then everyone — with the same users staying in the same bucket.

Advanced

Design flags so that turning something off is always instant, safe, and obvious.