"agents": {
    "<agent-name>": "<top-level-store-path>",

agents key contains an object of many agent-name keys and store path values to deploy.

agent-name is usually a hostname, but it can be any name, as long as it’s unique. If no agent-name is registered with Cachix, HTTP error 400 will be raised.

top-level-store-path can be any store path. The agent will detect NixOS, nix-darwin and home-manager store paths and activate them.