Function isProgressReportingAvailable

src/ink/terminal.ts:25–64

()

 * Note: Windows Terminal interprets OSC 9;4 as notifications, not progress.
 */
export function isProgressReportingAvailable(): boolean {
  // Only available if we have a TTY (not piped)
  if (!process.stdout.isTTY) {
    return false
  }

  // Explicitly exclude Windows Terminal, which interprets OSC 9;4 as
  // notifications rather than progress indicators
  if (process.env.WT_SESSION) {
    return false
  }

  // ConEmu supports OSC 9;4 for progress (all versions)
  if (
    process.env.ConEmuANSI ||
    process.env.ConEmuPID ||
    process.env.ConEmuTask
  ) {
    return true
  }

  const version = coerce(process.env.TERM_PROGRAM_VERSION)
  if (!version) {
    return false
  }

  // Ghostty 1.2.0+ supports OSC 9;4 for progress
  // https://ghostty.org/docs/install/release-notes/1-2-0
  if (process.env.TERM_PROGRAM === 'ghostty') {
    return gte(version.version, '1.2.0')
  }

  // iTerm2 3.6.6+ supports OSC 9;4 for progress
  // https://iterm2.com/downloads.html
  if (process.env.TERM_PROGRAM === 'iTerm.app') {
    return gte(version.version, '3.6.6')
  }

  return false
}

/**
 * Checks if the terminal supports DEC mode 2026 (synchronized output).