E4B regime map (ckpt-salvaged, 150 prompts): no clear workspace signature — sensor L11-22, motor from L23, persistence bump absent; candidate band inside KV-shared zone

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

results/REGIMES.json

@@ -32,9 +32,9 @@
   "hidden": 2560,
   "workspace_band": null,
   "kv_share_start": 25,
-  "jbar": "results/jbar_e4b.pt (running 2026-07-15)",
+  "jbar": "results/jbar_e4b.pt (150/256 prompts \u2014 ckpt-salvaged)",
   "scan": "results/exp4_e4b.log",
-  "status": "scan in progress on Spark; kv sharing: last 18 of 42 layers"
+  "status": "mapped 2026-07-16, PROVISIONAL: no clear workspace signature. sensor L11-22 (peak 0.36@L22), motor onset L23 rising to 0.52@L41, persistence flat ~0.05-0.13 (E2B's band-entry persistence bump is ABSENT). Candidate thin band L23-28 sits inside the KV-shared zone (L24+) \u2014 band looping likely structurally hampered on E4B. Needs: ignition cross-check + full-prompt jbar top-up before strong claims."
  },
  "google/gemma-4-31B-it": {
   "revision": "b9ea41a2887d8607f594846523f94c6cc75ac8a4",

scripts/parse_e4b_regimes.py

@@ -0,0 +1,28 @@
+"""Reconstruct regimes_e4b.pt from the exp4_e4b.log table (the scan's
+torch.save crashed on a relative path; the printed table is complete).
+Provenance note stored in the tensor dict: jbar from 150/256 prompts."""
+import re
+
+import torch
+
+sensor, motor, persist, content = [], [], [], []
+pat = re.compile(
+    r"^L\s*(\d+) \| ([\d.]+)\s*#* *\| ([\d.]+)\s*#* *\| ([\d.]+) \| ([\d.]+)")
+for line in open("results/exp4_e4b.log"):
+    m = pat.match(line.strip())
+    if m:
+        _, s, mo, p, c = m.groups()
+        sensor.append(float(s))
+        motor.append(float(mo))
+        persist.append(float(p))
+        content.append(float(c))
+assert len(sensor) == 42, len(sensor)
+torch.save({"sensor": torch.tensor(sensor), "motor": torch.tensor(motor),
+            "persist": torch.tensor(persist),
+            "content": torch.tensor(content),
+            "note": "reconstructed from exp4_e4b.log; jbar 150/256 prompts"},
+           "results/regimes_e4b.pt")
+print("saved 42 layers")
+print("sensor peak: L%d = %.2f" % (sensor.index(max(sensor)), max(sensor)))
+print("motor >=0.1 from: L%d" % next(
+    i for i, v in enumerate(motor) if v >= 0.1))