Regenerated after round 3 (build route unless noted).

form_gate CRASHED  -> {"finish": true, "content": "Refused: serving pipeline error: the form gate node returned unreadable output; nothing was built or written"}
shape CRASHED      -> {"finish": true, "content": "Refused: serving pipeline error: the shape node returned unreadable output; nothing was built or written"}
seat_contract DEAD -> {"finish": true, "content": "Build refused: serving pipeline error: the seat contract node returned unreadable output; nothing was built or written"}
HEALTHY build      -> {"finish": false, "file": "solution.py", "content": "def f():\n    return 1\n"}
