Agents Window development Use this skill for implementation, review, or design work under . 1. Apply the core principles - Preserve the layer direction: may import and lower layers; must never import . - Keep shared Sessions code provider-neutral. Non-provider contributions must not import provider implementations. - Model mutable session and chat state with observables. Use events for notifications, not as a parallel state model or for control flow. - Register Sessions menu IDs in and consume . - Import contributions from the appropriate entry point. - Prefer Sessions-owned adaptations over…