A deep dive extending Flipper in Rails: friendly actor IDs, team-wide flags, percentage rollouts, analytics events, and admin auditing.

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Martian Chronicles

A practical deep dive into extending the Flipper gem for Rails beyond its defaults. Covers four real-world customizations built for StackBlitz: resolving human-friendly actor IDs (usernames, emails, slugs) instead of raw database IDs; enabling feature flags for entire organizations so all members inherit them; tracking first-observed feature flag enablement events for analytics without flooding quotas; and adding audit logging for admin actions by injecting a custom Rack middleware into Flipper's standalone UI to access current user context.

The Flipper gem is amazing, here's how we extended it the Martian way—Martian Chronicles, Evil Martians’ team blog

Use-case: enabling feature flags using usernames

Use-case: enabling features for all the members of a team

Use-case: sending feature flag enablement events to analytics

Use-case: auditing feature flag enablement