By name: frb-feature-flag description: "Use when adding or testing flutter_rust_bridge feature flags, especially flags that require coverage for both enabled and disabled states or should have package-level config plus item-level #[frb(...)] overrides."
FRB Feature Flags
Use this skill when adding a feature flag, changing a feature flag, or writing coverage for a feature flag.
API Surface
For feature flags requiring coverage for both enabled and disabled states:
- Expose the flag in
flutter_rust_bridge.yaml. - Expose the flag in the command-line interface.
- Prefer adding an item-level
#[frb(...)]override when the behavior can reasonably be scoped to a Rust item.
Test Coverage
In frb_example/pure_dart, prefer tests that use the item-level #[frb(...)] override so enabled and disabled cases are both exercised in the same package.
Do not rely only on package-level config differences when both states can be covered clearly with item-level Rust APIs.