research(rectification): positive control for the angle-timing pipeline; Claude acceptance (BUG-1141)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8

scripts/research/angle_timing_positive_control.py

@@ -0,0 +1,41 @@
+"""Positive control for the angle-timing A1 pipeline (Claude acceptance 2026-10-01).
+
+Plants three day-precision events per case on dates when transit Saturn sits within
+0.15 deg of the TRUE natal ascendant, then ranks the truth minute with the same
+ranks_for() used by A1. A working pipeline must rank it near 0; moving the same
+dates by whole years must return it to chance (~0.5).
+
+    PYTHONHASHSEED=0 python3 scripts/research/angle_timing_positive_control.py
+"""
+import sys, statistics, random
+from datetime import date, timedelta
+sys.path.insert(0, ".")
+import swisseph as swe
+from scripts.research import angle_timing_lib as at
+from scripts.research.angle_timing_research import ranks_for
+cases = at.load_cases()
+res = {"real": [], "planted": [], "planted_shuffled_years": []}
+rng = random.Random(7)
+for case in cases:
+    ch = at.CaseChart(case)
+    asc_truth = float(ch.asc[at.RADIUS_MAX])
+    # find Saturn conjunction dates with the TRUE natal ascendant (tropical, both sides)
+    d = ch.local.date() + timedelta(days=400); hits = []
+    prev = None
+    while d < date(2026, 9, 1) and len(hits) < 3:
+        jd = swe.julday(d.year, d.month, d.day, 12.0)
+        s = float(at.aspect_sep(__import__("numpy").array([asc_truth]), at.planet_lon(jd, swe.SATURN))[0])
+        if s < 0.15 and (not hits or (d - hits[-1]).days > 200): hits.append(d)
+        d += timedelta(days=2)
+    if not hits:
+        continue
+    planted = [{"id": f"p{i}", "domain": "career", "precision": "day", "date": h.isoformat()} for i, h in enumerate(hits)]
+    # same dates moved by random whole years (keeps precision, breaks the alignment)
+    moved = [{**e, "date": (date.fromisoformat(e["date"]) + timedelta(days=365 * rng.choice([-3, -2, 2, 3]))).isoformat()} for e in planted]
+    moved = [e for e in moved if ch.local.date() < date.fromisoformat(e["date"]) < date(2026, 9, 1)]
+    for key, evs in (("planted", planted), ("planted_shuffled_years", moved)):
+        r = ranks_for(ch, evs)
+        res[key].append(r["TR"]["1.0"]["30"])
+    res["real"].append(ranks_for(ch, None)["TR"]["1.0"]["30"])
+for k, v in res.items():
+    print(f"{k:24s} n={len(v):2d} mean truth rank (TR, 1°, ±30) = {statistics.mean(v):.3f}   share with rank<0.15: {sum(1 for x in v if x < 0.15)/len(v):.2f}")