flynn/src/tools/types.ts

export interface ToolInputSchema {
  type: 'object';
  properties: Record<string, unknown>;
  required?: string[];
}

export interface Tool {
  name: string;
  description: string;
  inputSchema: ToolInputSchema;
  execute(args: unknown): Promise<ToolResult>;
}

export interface ToolCall {
  id: string;
  name: string;
  args: unknown;
}

export interface ToolResult {
  success: boolean;
  output: string;
  error?: string;
}

// Content block for assistant messages containing tool calls
export interface ToolUseBlock {
  type: 'tool_use';
  id: string;
  name: string;
  input: unknown;
}

// Content block for user messages returning tool results
export interface ToolResultBlock {
  type: 'tool_result';
  tool_use_id: string;
  content: string;
  is_error?: boolean;
}

// Message from assistant requesting tool use
export interface ToolUseMessage {
  role: 'assistant';
  content: ToolUseBlock[];
}

// Message from user returning tool results
export interface ToolResultMessage {
  role: 'user';
  content: ToolResultBlock[];
}