Early Access Features in `concept` stage are available to anyone who has opted in – this feels very counterintuitive

[dmarticus]

This warning message feels like you are getting around the product being broken by offloading the work in managing feature flags to the user

Instead, this should "warn opted in users will not have the flag enabled whilst in concept stage. Once it is in alpha or higher they will be added to the flag"

And then the linked flag should only include the persons with the enrollment if it is in those stages or not

Having to make a code change to swap from one phase to the next defeats the point of using an early access feature

Context: https://posthog.slack.com/archives/C07Q2U4BH4L/p1760603873026269

[lshaowei18]

Hey @dmarticus, I have been looking into this and i think I might be able to come up with a draft PR for this by today, do you mind giving me some feedback if you have not started on the feature?

The approach i am taking:

1. Create an early access feature cache similar to the cohort cache in the rust router
2. When we evaluate a flag and it has a super condition, we hit the cache and if the early access feature's status is concept, we return matches as false.

Apologies if this disrupts your flow; I have been wanting to implement something in rust and i thought this was a good practice

[lshaowei18]

I may I have overcomplicated it.

I think there is another solution, which is to remove Stage.CONCEPT from EarlyAccessFeature.ReleaseStage.

This way, when the feature flag's stage is switched to Stage.CONCEPT, the super_groups will be set to None and will fall back to the flag's release condition.

posthog/products/early_access_features/backend/api.py

Lines 108 to 114 in 3b846d7

	elif stage is not None and (stage not in EarlyAccessFeature.ReleaseStage):
	related_feature_flag = instance.feature_flag
	if related_feature_flag:
	related_feature_flag.filters = {
	**related_feature_flag.filters,
	"super_groups": None,
	}

This will require a DB migration to remove the super_groups on all feature flags that are associated with an early access feature with Stage.CONCEPT.