{
 "tm": "1RB1LA_1LC0RA_0LD1RC_---0LE_0LF1LE_1RF1LB",
 "status": "KILLED_NONHALT",
 "stage": "done",
 "updated": "2026-10-10",
 "reason": "check_kill PASS, independently re-verified",
 "parent": "1RB1LC_1RC1LB_1LD0RB_0LE1RD_---0LF_0LA1LF",
 "label": "#12b",
 "relation": "neighbour of #12: one transition away from #12's table (after renaming); its run is nearly identical (134 vs 133 cells at 1e9), so a look-alike, not a sibling"
}