Why it matters
Flags can separate code release from customer exposure. They also create configuration debt when ownership, expiry and evaluation rules are unclear.
Flags let a team release a capability gradually, but they also create another source of product state. Every flag needs an owner, a default and a plan to remove it.
Decisions to make
- Choose whether a flag targets environments, accounts, users or cohorts.
- Define defaults when the flag service cannot be reached.
- Set an owner and removal date for temporary flags.
- Separate release flags from permanent plan entitlements.
- Choose how targeting works across users, organizations and environments.
Build checklist
- Evaluate access on the server for protected operations.
- Log changes to flag state.
- Test both paths and remove stale flags after rollout.
- Define safe defaults when the flag service is unavailable.
- Track who changed a flag and when it can be retired.
Common mistakes
- Using a client-side flag to enforce paid or security-sensitive access.
- Using a client-side flag as the only protection for a paid feature.
- Leaving old flags in place until nobody remembers their meaning.
Tools & references
4 starting points to compare or study. Check fit, maintenance, terms and current capabilities before choosing one.