anthropic

type APIError struct {
	StatusCode int
	Body       string
	// RetryAfter is the wait parsed from Retry-After. HasRetryAfter is true when the header was
	// present (including "0", meaning retry immediately) so a missing header can still take the
	// exponential path (issue #532).
	RetryAfter    time.Duration
	HasRetryAfter bool
}

type ChatMessage struct {
	Role    string
	Content string
	Blocks  []ContentBlock
}

type Client struct {
	APIKey  string
	BaseURL string
	// WorkspaceID, when set, is sent as the anthropic-workspace-id header. It is
	// required when authenticating with an identity-linked API key (which is not
	// scoped to a single workspace); a plain workspace-scoped key leaves it empty.
	WorkspaceID string
	HTTPClient  *http.Client
}

type ContentBlock struct {
	Type      string          `json:"type"`
	Text      string          `json:"text,omitempty"`
	ID        string          `json:"id,omitempty"`
	Name      string          `json:"name,omitempty"`
	Input     json.RawMessage `json:"input,omitempty"`
	ToolUseID string          `json:"tool_use_id,omitempty"`
	Content   string          `json:"content,omitempty"`
	// IsError, on a tool_result block, marks the call as failed (Messages API tool_result.is_error)
	// so the model reads the content as an error observation. It is emitted only for tool_result
	// blocks and only when true (issue #524).
	IsError bool `json:"is_error,omitempty"`
}

type OutputConfig struct {
	Format *OutputFormat `json:"format,omitempty"`
}

type OutputFormat struct {
	Type   string          `json:"type"`
	Schema json.RawMessage `json:"schema"`
}

type Request struct {
	Model      string
	System     string
	Messages   []ChatMessage
	Tools      []Tool
	ToolChoice *ToolChoice
	// MaxTokens is the max_tokens sent; a non-positive value falls back to defaultMaxTok (issue #514).
	MaxTokens int
	// Temperature is sent verbatim when non-nil; nil leaves the Messages API default (issue #388).
	Temperature *float64
	// OutputConfig requests structured output (output_config.format); nil leaves it unset (issue #510).
	OutputConfig *OutputConfig
}

type Response struct {
	Text         string
	ToolCalls    []ToolUse
	StopReason   string
	InputTokens  int
	OutputTokens int
	DurationMs   int64
}

type Tool struct {
	Name        string          `json:"name"`
	Description string          `json:"description,omitempty"`
	InputSchema json.RawMessage `json:"input_schema"`
}

type ToolChoice struct {
	Type string `json:"type"`
}

type ToolUse struct {
	ID    string
	Name  string
	Input json.RawMessage
}