Function isFullscreenEnvEnabled

src/utils/fullscreen.ts:112–129

()

 * opt in).
 */
export function isFullscreenEnvEnabled(): boolean {
  // Explicit user opt-out always wins.
  if (isEnvDefinedFalsy(process.env.CLAUDE_CODE_NO_FLICKER)) return false
  // Explicit opt-in overrides auto-detection (escape hatch).
  if (isEnvTruthy(process.env.CLAUDE_CODE_NO_FLICKER)) return true
  // Auto-disable under tmux -CC: alt-screen + mouse tracking corrupts
  // terminal state on double-click and mouse wheel is dead.
  if (isTmuxControlMode()) {
    if (!loggedTmuxCcDisable) {
      loggedTmuxCcDisable = true
      logForDebugging(
        'fullscreen disabled: tmux -CC (iTerm2 integration mode) detected · set CLAUDE_CODE_NO_FLICKER=1 to override',
      )
    }
    return false
  }
  return process.env.USER_TYPE === 'ant'
}

/**
 * Whether fullscreen mode should enable SGR mouse tracking (DEC 1000/1002/1006).