Function detectTerminalImageSupport

cli/src/utils/terminal-images.ts:17–50

(
  env: CliEnv = getCliEnv(),
)

 * Detect which image protocol the terminal supports
 */
export function detectTerminalImageSupport(
  env: CliEnv = getCliEnv(),
): TerminalImageProtocol {
  if (cachedProtocol !== null) {
    return cachedProtocol
  }

  // Check for iTerm2
  if (env.TERM_PROGRAM === 'iTerm.app') {
    cachedProtocol = 'iterm2'
    return cachedProtocol
  }

  // Check for Kitty
  if (
    env.TERM === 'xterm-kitty' ||
    env.KITTY_WINDOW_ID !== undefined
  ) {
    cachedProtocol = 'kitty'
    return cachedProtocol
  }

  // Check for Sixel support (less common)
  if (
    env.TERM?.includes('sixel') ||
    env.SIXEL_SUPPORT === 'true'
  ) {
    cachedProtocol = 'sixel'
    return cachedProtocol
  }

  cachedProtocol = 'none'
  return cachedProtocol
}

/**
 * Check if terminal supports inline images