Policy input keyframes — linspace 8 subgoals (3 demos)

Left→right: k0 … k7. Labels show frame index in each demo.

demo 0
141 fr
indices: [0, 20, 40, 60, 80, 100, 120, 140]

demo 12
71 fr
indices: [0, 10, 20, 30, 40, 50, 60, 70]

demo 23
141 fr
indices: [0, 20, 40, 60, 80, 100, 120, 140]

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