model

type Client interface {
	Provider() string
	ProviderName() string
	ListModels() map[string]ModelMetadata
	NewModel(mdlCfg config.ModelConfig) (Model, error)
	NewState() State
}

type Model interface {
	Generate(ctx context.Context, st State, opts *Options) error
	SetTools(tools map[string]tool.Tool, sb *system.Sandbox) error
	ContextLimit() int
}

type ModelInfo struct {
	Name        string
	DisplayName string    // Optional
	Created     time.Time // Optional
}

type ModelMetadata struct {
	Model        string
	Name         string
	Reasoning    bool
	ContextLimit int
	OutputLimit  int
	InputCost    float64
	OutputCost   float64
}

type Options struct {
	Verbose bool
	Trace   bool
}

type State interface {
	SystemPrompt(s string)
	Prompt(s string)
	Len() int
	Step(n int) Step
	Clear()
	Usage() (int64, int64, int64) // input tokens, output tokens, contextTokens
	Cost() (float64, float64)     // input cost, output cost
}

type Step struct {
	Type    StepType
	Content string          // Prompt, ModelResponse, Thinking, and ToolOutput
	Name    string          // ToolCall and ToolOutput
	Input   json.RawMessage // ToolCall
}

type StepType int