PREREG_flat_exp_limit outcome: ACCEPTED (server numbers equal to the smoke in every projection cell; 0 violations in the guaranteed family).

Translation limit of the analogy (f shrank, x-scale did not -> m = inf):
  defect + remembered + point + exp        APS 2531  CHA 1972  both 4503
  G2 + defect + remembered + point + exp   APS 2588  CHA 1997  both 4585
  G2 + contra + remembered + point + exp   APS 2773  CHA 2073  both 4846
  Chandrupatla                             APS 2787  CHA 2441  both 5228
Per problem against Chandrupatla now SIGNIFICANT ON BOTH SETS: G2+contra+rem+pt+exp APS 98/18/37 p=1.5e-7, CHA 28/3/9 p=0.0026; defect+rem+pt+exp APS 86/20/47 p=9e-4, CHA 27/3/10 p=0.0076.
NOT where predicted: fun9 only -1..-3; the gain is on the flat families (x^9 177 -> 161, x^19 339 -> 167).
Server regression x2: 1179 passed, 1 failed = the paper-number check.

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

sweep_full.py

@@ -285,6 +285,24 @@ def build_grid_orderpt(smoke):
             for gu in guards for ext in ("none", "pattern") for pre in ORDERPT_PRESTEPS]
 
 
+EXPLIMIT_BASES = ("flatanalogpt", "flatanalogmempt", "defect+flatanalogmempt",
+                  "contra+flatanalogmempt")
+
+
+def build_grid_explimit(smoke):
+    """PREREG_flat_exp_limit_2026-09-21: every order-point variant without / with the
+    translation limit (m = inf), on the proposed rule with and without G2."""
+    presteps = ("none",) + tuple(p for b in EXPLIMIT_BASES for p in (b, b + "+exp"))
+    for pre in presteps[1:]:
+        x, _n, ok = pure_root(lambda t: t - 1.0, 0.0, 3.0, 1e-10, 100, similarity="ratio",
+                              scale="derived3", guard="project", prestep=pre)
+        if not (ok and abs(x - 1.0) < 1e-8):
+            raise SystemExit(f"prestep={pre} preflight FAILED: refusing to report zeros")
+    guards = ("project", "credit") if smoke else GUARD_MODES
+    return [("pure", "ratio", "derived3", gu, "x", pre, "recent", "distance", "none", ext)
+            for gu in guards for ext in ("none", "pattern") for pre in presteps]
+
+
 def build_grid_extrap2(smoke):
     """PREREG_extrapolation_gates_2026-09-21: the same cells as build_grid_extrap, every
     one in all five modes (none, A, G1, G2, G3)."""
@@ -464,10 +482,12 @@ def main():
     memmode = "--flatanalogmem" in sys.argv  # the analogy remembered as a property of the run
     dcmode = "--defcontra" in sys.argv     # defect x contra x flat regime, composites
     ptmode = "--orderpt" in sys.argv       # split at the point from the pair's order
+    expmode = "--explimit" in sys.argv     # the translation limit of the analogy, m = inf
     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_orderpt(smoke) if ptmode else
+    specs = (build_grid_explimit(smoke) if expmode else
+             build_grid_orderpt(smoke) if ptmode else
              build_grid_defcontra(smoke) if dcmode else
              build_grid_flat(smoke, ("flatanalogmem", "flatanalog")) if memmode else
              build_grid_flat(smoke, ("flatanalog", "flatstickexit")) if analogmode else
@@ -503,8 +523,9 @@ 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 ptmode or dcmode or memmode or analogmode or judgemode or exitmode or stickmode or creepmode or flat2mode or flatmode or ext2mode or extmode or decmode or ordermode or capmode or combomode or pointsmode or dirmode:
-        base = ("sweep_orderpt" if ptmode else
+    if expmode or ptmode or dcmode or memmode or analogmode or judgemode or exitmode or stickmode or creepmode or flat2mode or flatmode or ext2mode or extmode or decmode or ordermode or capmode or combomode or pointsmode or dirmode:
+        base = ("sweep_explimit" if expmode else
+                "sweep_orderpt" if ptmode else
                 "sweep_defcontra" if dcmode else
                 "sweep_flatanalogmem" if memmode else
                 "sweep_flatanalog" if analogmode else