Add GTL cohort composition backtest

scripts/run_backtest_snapshot.py

@@ -62,6 +62,7 @@ def _parse_args() -> argparse.Namespace:
             "production_structural_overlay",
             "explicit_target_ladder",
             "gtl_tuning",
+            "gtl_confirmation",
         ),
         default=None,
         help="Research-only S/R detector/gate arm.",
@@ -71,6 +72,14 @@ def _parse_args() -> argparse.Namespace:
         default=None,
         help="Research-only GTL configuration as a JSON object (requires --sr-variant gtl_tuning).",
     )
+    parser.add_argument(
+        "--gtl-confirm-config",
+        default=None,
+        help=(
+            "Research-only GTL intersection/union configuration as JSON "
+            "(requires --sr-variant gtl_confirmation)."
+        ),
+    )
     parser.add_argument(
         "--entry-start",
         default=None,
@@ -210,6 +219,12 @@ async def _main() -> None:
         if args.sr_variant != "gtl_tuning":
             raise SystemExit("--gtl-config requires --sr-variant gtl_tuning")
         os.environ["BACKTEST_GTL_CONFIG"] = args.gtl_config
+    if args.gtl_confirm_config:
+        if args.sr_variant != "gtl_confirmation":
+            raise SystemExit(
+                "--gtl-confirm-config requires --sr-variant gtl_confirmation"
+            )
+        os.environ["BACKTEST_GTL_CONFIRM_CONFIG"] = args.gtl_confirm_config
     if args.entry_start:
         os.environ["BACKTEST_ENTRY_START"] = args.entry_start
     if args.entry_end: