subagent

type Def struct {
	Name          string   // agent type name (used as subagent_type value)
	Description   string   // LLM-readable description
	ToolNames     []string // tool names parsed from the "tools" field
	SystemPrompt  string   // body text used as the sub-agent system prompt
	Model         string   // model name to use for this agent type; "" = runner default
	MaxIterations int      // iteration cap; 0 = defaultSubAgentMaxIter (50)
	Color         string   // color hint (parsed, reserved for UI)
	// Origin is the layer this definition was found in, so status can show a
	// plugin's contribution and anything that shadowed it.
	Origin plugin.Origin
}