MLC124: .animate chains a method that does not mutate the target

qual reports MLC124 when a .animate chain calls a method the knowledge profile curates as returns_self: false — a getter or copy such as copy() or generate_target(). The chained call runs against the generated target copy and only returns a value; the copy is unchanged, so the built animation shows nothing.

• Default severity: warning
• Minimum confidence: high
• Implementation phase: 2
• Fix: none (a mutating method, or calling the getter outside .animate, is suggested)

Only positively curated returns_self: false methods fire; uncurated methods and targets with an unresolved class stay silent.

Wrong

class Demo(Scene):
    def construct(self):
        square = Square()
        self.add(square)
        self.play(square.animate.copy())  # copies the target, animates nothing

Right

class Demo(Scene):
    def construct(self):
        square = Square()
        self.add(square)
        self.play(square.animate.shift(RIGHT))