Bot that automatically fixes the smooth setting when it isn't correct.

Smooth Bot.py

from fontPens.guessSmoothPointPen import GuessSmoothPointPen
from fontParts.world import RGlyph
from mojo.subscriber import Subscriber, registerGlyphEditorSubscriber, disableSubscriberEvents

class SmoothBot(Subscriber):

    debug = False

    def glyphEditorGlyphDidChangeContours(self, info):
        glyph = info["glyph"]
        ghost = RGlyph()
        pointPen = GuessSmoothPointPen(
            outPen=ghost.getPointPen()
        )
        glyph.drawPoints(
            pointPen,
            components=False
        )
        with disableSubscriberEvents():
            for contourIndex, ghostContour in enumerate(ghost.contours):
                contour = glyph.contours[contourIndex]
                for segmentIndex, ghostSegment in enumerate(ghostContour.segments):
                    segment = contour.segments[segmentIndex]
                    if segment.smooth != ghostSegment.smooth:
                        segment.smooth = ghostSegment.smooth


registerGlyphEditorSubscriber(SmoothBot)