I Scanned 3 Feature Flag Companies for Stale Flags. Here's What I Found.

I ran FlagShark on the open source repos of Unleash, PostHog, and GrowthBook. The companies building feature flag tools have stale flags in their own codebases.

Feature FlagsApril 7, 202612 min read

Feature Flag Platform Migration Guide: How to Switch Providers Without Breaking Production

A step-by-step guide to migrating between feature flag platforms—from LaunchDarkly to alternatives, from custom implementations to managed platforms, and using the migration as a flag debt cleanup opportunity.

Feature FlagsMarch 31, 20268 min read

Feature Flag Strategy: What Works for Startups vs Enterprises

Feature flag best practices depend on team size and scale. Learn the right strategy for small teams under 20 engineers and large organizations with 100+ engineers, including common mistakes at each stage.

Feature FlagsMarch 10, 20268 min read

Feature Flag Debt by Platform: What LaunchDarkly, Split, and Unleash Each Miss

Every feature flag platform leaves cleanup gaps. Learn what flag debt LaunchDarkly, Split.io, Unleash, and custom implementations each miss—and how to close the gap regardless of your provider.

Feature FlagsMarch 3, 202612 min read

Feature Flag Maturity Model: 5 Stages From Chaos to Automated Cleanup

Assess your team's feature flag maturity level with this five-stage model. From ad-hoc flags to fully automated lifecycle management, learn the strategies to advance at each stage.

Feature FlagsFebruary 26, 202622 min read

5 Feature Flag Production Postmortems That Changed How Teams Ship

Deep-dive postmortems from 5 real-world feature flag incidents — Knight Capital, Facebook, Cloudflare, Azure, and Grafana. Each includes a full timeline, root cause analysis, and the changes that prevented recurrence.

Feature FlagsFebruary 16, 202610 min read

The Feature Flag Time Bomb: Every Failure Pattern, Documented

A comprehensive taxonomy of 7 real-world feature flag failure patterns with documented incidents from Knight Capital, Cloudflare, Grafana, and more. Learn what goes wrong and how to prevent it.

Feature FlagsFebruary 8, 202613 min read

Feature Flags in Ruby on Rails: Flipper, Unleash, and Cleanup Best Practices

A comprehensive guide to implementing feature flags in Ruby on Rails with Flipper, Unleash, and custom solutions. Covers rollout patterns, Rails-specific pitfalls, and why cleanup matters more in Rails than you think.

Feature FlagsFebruary 6, 202613 min read

SOC2 Compliance and Feature Flags: What Auditors Want to See

Preparing for SOC2? Feature flags intersect with change management, access control, and risk assessment. Here's what auditors look for and how to be ready.