### What's needed? Extend the [ConfigManagingActor](https://github.com/frequenz-floss/frequenz-sdk-python/blob/v1.x.x/src/frequenz/sdk/config/_config_managing.py#L20) to enable key filtering so that applications can subscribe only to one key rather than the whole configuration. ### Proposed solution The naive solution might be to accept an optional `filter_key` parameter to instantiate the actor and filter the configuration before sending it. (TBD)
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