Struct PassContribution 

pub struct PassContribution {
    pub descriptor: PassDescriptor,
    pub command_buffer: CommandBufferId,
}

A render pass an agent contributes for this frame.

Instead of locking the shared SharedFrameGraph to add_pass directly, a recording agent writes its contribution into a per-layer slot on its OutputDeck (ScenePassSlot, UiPassSlot, OverlayPassSlot). The engine folds those slots into the graph in a fixed layer order (scene → ui → overlay) after the agent wave — preserving the previous insertion order while freeing the agents from the Mutex<FrameGraph>, so they can run concurrently.

Fields

descriptor: PassDescriptor

The pass’s resource read/write declaration.

command_buffer: CommandBufferId

The finished command buffer recorded for the pass.