The neighbour check was three queries per file (~2,000 files/minute); now one per round of 20k files, with a cursor so waiting files don't take every round's places, and rounds until nothing is left or 30 s. On the dev backlog (old-style fragments): ~18k files/minute in the 30 s budget; at full throughput the new fragment rule leaves ~1,200 files/minute. A group that fails GROUP (gone from the server) no longer stops planning the others; edge:bench's groups are inactive. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>