/**
 * DevLoop tool layer · 标准化错误类型
 *
 * 用法:
 *   throw new ToolValidationError('summary', 'too short');
 *   throw new ToolSandboxError('/abs/path', 'pm');
 *
 * Claude CLI 看到 thrown error → 包装为 tool_result { is_error: true, content: msg }
 */

class ToolValidationError extends Error {
  constructor(field, reason) {
    super(`${field}: ${reason}`);
    this.name = 'ToolValidationError';
    this.field = field;
    this.reason = reason;
  }
}

class ToolSandboxError extends Error {
  constructor(p, agent) {
    super(`Sandbox violation: ${agent} tried to write ${p}`);
    this.name = 'ToolSandboxError';
    this.path = p;
    this.agent = agent;
  }
}

class ToolMissingDependencyError extends Error {
  constructor(dep) {
    super(`Tool requires ${dep} in ctx (LoopController injection)`);
    this.name = 'ToolMissingDependencyError';
    this.dep = dep;
  }
}

module.exports = {
  ToolValidationError,
  ToolSandboxError,
  ToolMissingDependencyError,
};