Function getFileChangeType

cli/src/utils/implementor-helpers.ts:519–534

(toolBlock: ToolContentBlock)

 * Determine file change type based on tool and context.
 */
export function getFileChangeType(toolBlock: ToolContentBlock): FileChangeType {
  const baseToolName = getBaseToolName(toolBlock.toolName)
  // write_file creating new file = Added
  if (baseToolName === 'write_file') {
    const isCreate = isCreateFile(toolBlock)
    return isCreate ? 'A' : 'M'
  }

  // str_replace is always a modification
  if (baseToolName === 'str_replace') {
    return 'M'
  }

  // Default to modified
  return 'M'
}

/**
 * Get aggregated file stats from all edit blocks.