"""Optional runtime progress renderers.

Degrades to None when rich is absent so callers fall back to plain-text
progress (the CLI stays dependency-free in its fallback path).
"""

from .plain import PROGRESS_REGISTRY, register_progress  # noqa: F401 (re-export)

try:
    from .rich_terminal import RichTerminalProgress
except ImportError:  # rich not installed
    RichTerminalProgress = None
else:
    PROGRESS_REGISTRY.register('rich', RichTerminalProgress)

__all__ = ["RichTerminalProgress", "PROGRESS_REGISTRY", "register_progress"]