So I have this agent with 100+ shapes which are boots, t-shirts etc.

The agent layer node has this very uncomfortable way to choose from drop-down list of shapes.

I know that I can unpack the agent and just use blast node to create layer by mask (like *boots*)
The problem is - I do not know how to pack agent after this.

Or maybe there is a way to manipulate agentshapename without unpacking an agent?