{
  "completed": "mixed stable levels1..7",
  "failed": "mixed level8,1sample only, not a benchmark",
  "failure": "HTTP read TimeoutError; original helper did not retain exact API call site",
  "observation": "Total sample latency grew from approximately0.7s at1 to3s at7",
  "runtime": "All24children exit0,unforced,reaped; no channel errors after cleanup",
  "local_helper_fix": "Read only launched channels via existing per-stream status GET; keep5s API timeout; record slow/error boundaries",
  "resume": "mixed-resume levels8..16 only; bootstrap first8 with new run IDs",
  "comparison_limit": "Do not join RTP anchors across mixed/mixed-resume. Query scope changed; levels1..7 were not remeasured."
}