This is the standard documented mountaineering route to the summit of Roche de la Muzelle in the Écrins. It is generally treated as an alpine climb rather than a hiking path. The route is typically approached from the Refuge de la Muzelle, which is the usual base for ascents of the peak. The climb is not a technical rock route in the classic sense, but it still requires mountain experience, route-finding, and secure movement on steep alpine terrain. Objective hazards can include loose rock, snow patches early in the season, and poor visibility. I am not confident enough to provide a more specific named variant, grade, or timing without risking inaccuracy.
