Cursor

• Built-in name: cursor
• Default command: cursor-agent acp
• Upstream: https://cursor.com/docs/cli/acp

Cursor can advertise model ids with bracketed settings (for example, composer-2.5[fast=false]). acpx --model composer-2.5 cursor ... accepts a bare model name only when Cursor advertises exactly one matching bracketed variant; use the full advertised id when multiple variants are available.

If your Cursor install exposes ACP as agent acp instead of cursor-agent acp, override the built-in command in config:

{
  "agents": {
    "cursor": {
      "command": "agent acp"
    }
  }
}