similarity in two more places MEASURED: triple by shape gives APS 2527 — below the published 2806 and below EVERY baseline including chandrupatla 2785 — and far-end by dissimilarity gives CHA 2683 (the ITP target met) with 5511 over both sets (project target 6026 beaten, ITP-oracle 5871 passed). Guarantee intact everywhere, 193/199. Neither mode is inert (38.6% / 26.9% of steps changed). A+B do NOT compose: 2884/2859 is worse than either alone — select, never weight, and never assume composability

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

sweep_full.py

@@ -198,6 +198,15 @@ def build_grid_log(smoke):
             for sim in sims for sc in ("derived", "derived3") for gu in guards]
 
 
+def build_grid_combo(smoke):
+    """A+B together (PREREG 2026-09-21 §2: licensed only because each mode alone improved
+    APS — A 2527 and B 2726 against the published 2806)."""
+    sims = ["ratio", "sqrt"] if smoke else sorted(PURE_SIMS)
+    guards = ("credit", "project") if smoke else GUARD_MODES
+    return [("pure", sim, "derived3", gu, "x", "slope", "shape", "dissimilar")
+            for sim in sims for gu in guards]
+
+
 def build_grid_points(smoke):
     """Mode A (PREREG 2026-09-21): the triple chosen by shape, on top of the slope gate that
     already reached the project target. Three-point scale only — a triple must exist."""
@@ -255,9 +264,11 @@ def main():
     logmode = "--log" in sys.argv          # the u-space grid, written to its OWN file
     gatemode = "--gate" in sys.argv        # the pre-step gate grid, likewise
     slopemode = "--slope" in sys.argv      # the slope-stability gate grid
+    combomode = "--combo" in sys.argv      # modes A and B together
     pointsmode = "--points" in sys.argv    # mode A: triple by shape
     dirmode = "--direction" in sys.argv    # mode B: far end by dissimilarity
-    specs = (build_grid_points(smoke) if pointsmode else
+    specs = (build_grid_combo(smoke) if combomode else
+             build_grid_points(smoke) if pointsmode else
              build_grid_direction(smoke) if dirmode else
              build_grid_slope(smoke) if slopemode else
              build_grid_gate(smoke) if gatemode else
@@ -277,8 +288,9 @@ def main():
 
     # the published sweep_full.json is what verify_article.py checks the paper
     # against, so the log grid never writes into it
-    if pointsmode or dirmode:
-        base = "sweep_points" if pointsmode else "sweep_direction"
+    if combomode or pointsmode or dirmode:
+        base = ("sweep_combo" if combomode else
+                "sweep_points" if pointsmode else "sweep_direction")
         out = f"{base}_smoke.json" if smoke else f"{base}.json"
         with open(out, "w", encoding="utf8") as fh:
             json.dump(results, fh)