[vaprdev]

A red capsule bike parked on pale cracked concrete, seen from above, with its rider walking up to it.

• Calm: he stands by the bike. Lively: he walks up to it and back. Teeming: he rides off in a red tail-light streak and later slides back in sideways.
• Clicks crack the pavement; the easter egg lifts chunks of pavement around a crater; a finished agent sends another rider speeding along the bottom.

Verified: typecheck, dev/check.ts rider in octant and quadrant modes and --verify-dirty (0 failed, up to 12 ms/frame), screenshots up to date.