bench: include prompts in results bundle

bench/run_matrix.py

@@ -762,6 +762,13 @@ def orchestrate(args: argparse.Namespace) -> int:
                 "quant_gemm": args.quant_gemm, "m5_sweep": args.m5_sweep}
     out.mkdir(parents=True, exist_ok=True)
     write_receipt(out, args, software, data, weights, settings)
+    # Ship the exact prompts/conditions with the results so the bundle is self-describing.
+    prompts_out = out / "prompts"
+    prompts_out.mkdir(exist_ok=True)
+    for name in ("index.json", "index.csv"):
+        source = Path(args.data_root) / "prompts" / name
+        if source.is_file():
+            shutil.copy2(source, prompts_out / name)
     exit_code = 0
     lock = GpuLock(args.lock_dir, args.steal_stale_lock)
     # SIGINT is explicit: it is ignored by default when launched as a background job (nohup, agents).