Are there any good resources for managing feature flags like this? I am currently using Netflix Archaius and it's working great, but I find it's easy to forget

Are there any good resources for managing feature flags like this? I am currently using Netflix Archaius and it's working great, but I find it's easy to forget what values are set or what flags exist. Over time, it's easy to make a mistake and deploy something broken. I'm currently working on instituting a kanban policy to replace feature flags with static configurations ~1-2 months after their initial deployment where possible. But I'm thinking there's a better way to avoid this trap.