My recent experience working with feature flags: - enable percentage rollout only after validating for specific test accounts/ids - when using percentage roll

My recent experience working with feature flags: - enable percentage rollout only after validating for specific test accounts/ids - when using percentage rollout, also have a 'killswitch' flag that can negate belonging to the enabled group - if you don't need to test specific accounts/ids first, you can use only a 'killswitch' rollout flag starting at 100% and decreasing. enabling still possible to remove particular id's from feature enabled group - best experience was making a helper that everything goes through rather than query feature flag name directly. This lets you test things like what happens in CI/CD if I hard-code that return value to fully enabled. This gives you test coverage using the flag for all the tests that don't mention it at all. The helper can also do any combination of required flags/killswitches for something to be meaningfully active. - and for expired flags, have a recurring nag mechanism, e.g. Slack post by team/channel owner