CCF v1.6.1

[1.6.1] — 2026-06-17

Changed

• Benchmark concurrency: tasks now run sequentially (one at a time, never overlapping) while
  panelists within a task run in parallel (launched together, batch-awaited before judging).
  Previously every call was fully serial with a 3s gap between calls. run-benchmark.sh, the
  /fusion-benchmark command, and the benchmark README all updated. Verified: a 3-panelist task
  finishes in ~slowest-panelist time (85s) instead of the sum.
• benchmark/results/ is now gitignored (generated output).