two more places for similarity: points='shape' (WHICH triple the model uses, argmin |phi-xi| over declared candidates — select, never weight) and direction='dissimilar' (the far end read by |f| rather than by distance); defaults bit-identical, P1-P5 pinned (7 green), inertness counters make an inert mode a failed EXPERIMENT rather than a pass; each grid writes to its own file

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

sweep_full.py

@@ -111,10 +111,13 @@ def make_method(spec):
     sim, scale, guard = spec[1], spec[2], spec[3]
     space = spec[4] if len(spec) > 4 else "x"
     prestep = spec[5] if len(spec) > 5 else "none"
+    points = spec[6] if len(spec) > 6 else "recent"
+    direction = spec[7] if len(spec) > 7 else "distance"
 
     def m(f, a, b, xtol, maxfev):
         return pure_root(f, a, b, xtol, maxfev, similarity=sim,
-                         scale=scale, guard=guard, space=space, prestep=prestep)
+                         scale=scale, guard=guard, space=space, prestep=prestep,
+                         points=points, direction=direction)
     return m
 
 
@@ -124,6 +127,10 @@ def label(spec):
     tag = "pure"
     if len(spec) > 4 and spec[4] != "x":
         tag = spec[4]
+    if len(spec) > 6 and spec[6] != "recent":
+        tag = f"{tag}+shape"
+    if len(spec) > 7 and spec[7] != "distance":
+        tag = f"{tag}+dissim"
     if len(spec) > 5 and spec[5] != "none":
         # name the gate by WHICH gate it is: "progress" is a measured negative and must
         # never be confused with "slope" in a results file
@@ -191,6 +198,23 @@ def build_grid_log(smoke):
             for sim in sims for sc in ("derived", "derived3") 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."""
+    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", "distance")
+            for sim in sims for gu in guards]
+
+
+def build_grid_direction(smoke):
+    """Mode B (PREREG 2026-09-21): the far end read by dissimilarity, on top of the slope gate."""
+    sims = ["ratio", "sqrt"] if smoke else sorted(PURE_SIMS)
+    guards = ("credit", "project") if smoke else GUARD_MODES
+    return [("pure", sim, sc, gu, "x", "slope", "recent", "dissimilar")
+            for sim in sims for sc in ("derived", "derived3") for gu in guards]
+
+
 def build_grid_slope(smoke):
     """The slope-stability gate grid (PREREG 2026-09-21). Only derived scales: there must be
     a slope to judge. Baselines are not recomputed — they are in sweep_full.json."""
@@ -231,7 +255,11 @@ 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
-    specs = (build_grid_slope(smoke) if slopemode else
+    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
+             build_grid_direction(smoke) if dirmode else
+             build_grid_slope(smoke) if slopemode else
              build_grid_gate(smoke) if gatemode else
              build_grid_log(smoke) if logmode else build_grid(smoke))
     t0 = time.time()
@@ -249,6 +277,14 @@ 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"
+        out = f"{base}_smoke.json" if smoke else f"{base}.json"
+        with open(out, "w", encoding="utf8") as fh:
+            json.dump(results, fh)
+        print(f"wrote {out}  ({time.time() - t0:.0f}s total)", flush=True)
+        report(results)
+        return
     if slopemode:
         out = "sweep_slope_smoke.json" if smoke else "sweep_slope.json"
         with open(out, "w", encoding="utf8") as fh: