Unleash / unleash / 26842743641

87%

master: 91%

Build Type

push

github

Committed by web-flow

Commit Message

feat: add Sunset feature flag type (#12157)

## About the changes
Adds a new "Sunset" feature flag type to help teams gradually reduce a
feature's exposure and remove it from the codebase. It has a **default
lifetime of 90 days**, after which flags of this type are marked
potentially stale to prompt cleanup.

[Screencast from 2026-06-02
12-40-44.webm](https://github.com/user-attachments/assets/bd576004-3572-4e0e-a9d9-733cfc6c0515)

### Changes made
Backend:
- Migration seeds the `sunset` type into `feature_types` (90-day
lifetime). The existing potentially-stale logic picks up the lifetime
automatically, so no service changes are needed.
- Add `sunset` to the `type` enum in create/update feature request
schemas; without this, creating a sunset flag failed OpenAPI validation
("must be equal to one of the allowed values").

Frontend:
- Add the `SUNSET` constant and map it to `TrendingDownIcon` in
getFeatureTypeIcons.
- Add `sunset` to the generated create/update feature schema models to
keep them in sync with the spec.

Tests:
- New e2e assertion verifying the Sunset type exists with a 90-day
lifetime, plus updated flag-type count assertions and the property-based
flag-type generator.

### Discussion points
90 days might not be the right lifetime for a sunset flag. In some cases
it will probably need to stay around longer, and other times you might
want to remove a feature more aggressivly.

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

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