1.1
Choose the fallback
If the flag cannot answer, what should production do?
Start with the behavior you would trust during a stale snapshot, missing key, or emergency rollback.
Production default: off
1.0 Model
Model the release before it reaches production.
Choose the fallback, decide where the change can run, name why the flag exists, and leave the cleanup note while the context is still fresh.
Four decisions make a flag safe to ship.
A flag is more than a key. Before it guards a real release, it should say what production does by default, where the change can run, why the flag exists, and when someone should come back to it.
1.2
Limit the first environments
Where can this release behave differently before production changes?
Let development and staging move first while production keeps the fallback until the release is ready.
Development and staging: on
1.3
Name the reason
Is this a release, experiment, permission, ops switch, or configuration flag?
Classify the flag while the decision is fresh, so future readers know whether to widen, keep, or remove it.
Intent: release
1.4
Leave the exit note
If the flag is temporary, when should someone come back to it?
Temporary flags carry a review date and note, so shipped code does not leave a mystery toggle behind.
Review after rollout
Keep the release model attached to the flag.
The fallback, environment defaults, intent, review date, and first evaluation path live beside the flag. A teammate should not need the original ticket to understand why the toggle exists.
Production has a known answer
The selected environment shows an explicit off fallback before any targeting rule exists.
The intent stays with the flag
Type, lifecycle, review date, and cleanup note stay close to the key instead of drifting into a ticket.
Evaluation starts from the same decision
The Flow view shows the fallback path first, then the SDK snippet follows from that model.
What changes when you model first.
The release stops depending on memory and starts from a written decision the runtime, rollout, and cleanup steps can all inherit.
01
Production keeps a fallback
The release can be guarded without making the safe behavior implicit in application code.
02
Lower environments move first
Development and staging can run ahead while production waits for a deliberate change.
03
Temporary flags get a return date
The cleanup note is written while the reason for the flag is still obvious.
04
Rollout starts from a written model
Evaluation, targeting, protection, and review all inherit the same fallback and intent.
Then move the release forward.
Once the model is clear, evaluation becomes mechanical. The SDK can ask for the typed value, rollout rules can widen exposure, and review has something concrete to enforce.
Start with your next release.
Model the fallback, scope, intent, and cleanup path before the guarded branch reaches production.
Get started