diff --git a/docs/research/pre_work_error_ledger.md b/docs/research/pre_work_error_ledger.md
index 4030d7bf..c8b20272 100644
--- a/docs/research/pre_work_error_ledger.md
+++ b/docs/research/pre_work_error_ledger.md
@@ -81,6 +81,7 @@ For large architecture or release work, also read:
 | ERR-048 | Candidate-time scanner assumed all documented D4/D24/D30 divisions were exposed by `jyotish_engine.py varga`; actual `--d4` failed at runtime. | mitigated 2026-07-12 | Candidate scans must record unsupported Varga flags as `unavailable_vargas`; only successfully computed D1/D9/D10 fields may drive local sensitivity output until a unified Varga contract exists. |
 | ERR-049 | PyJHora benchmark runner executed on `--help`, used a wrong repository-root path in `run_skill_baseline.py`, and failed when reused without pre-created output directories. | mitigated 2026-07-12 | Keep `tests/test_pyjhora_compare_cli.py`; require explicit `--build-local`, safe argparse help, correct repo root, and directory creation inside `run_sample()`. |
 | ERR-050 | Prashna CLI/API/UI could synthesize or accept a non-question chart; legacy Tajika/Saham/Sphuta/Kunda paths also exposed approximate values as usable evidence. | mitigated 2026-07-12 | Require backend Swiss `PrashnaContext` with question text/time/location/timezone; reject client planets/ascendant. Block legacy Sphuta/Kunda/Gulika/Panchavargiya and no-location Saham paths; keep seven-planet Tajika interactions partial until named-yoga golden cases and formula parity exist. |
+| ERR-051 | Privacy redaction can replace executable numeric test fixtures with bare placeholder identifiers such as `REDACTED_YEAR`, causing `NameError` before a regression reaches its target. | observed 2026-07-12 | Public tests must use generic fixtures (for example 1990) or quoted placeholders only; run `rg -n "REDACTED_YEAR" tests` before release and repair executable occurrences. |
 
 ## Fragment Sweep Command Set
 
diff --git a/scripts/adhana.py b/scripts/adhana.py
index 1f2f1fbb..5e637722 100644
--- a/scripts/adhana.py
+++ b/scripts/adhana.py
@@ -12,7 +12,6 @@ from __future__ import annotations
 from typing import Dict, Any
 
 from jaimini import calc_special_lagnas_precise
-from prashna import calc_gulika_simple
 from varga import calc_all_vargas
 
 
@@ -45,7 +44,13 @@ def analyze_adhana_candidates(payload: Dict[str, Any]) -> Dict[str, Any]:
     asc_lon = float(payload["asc_lon"])
     sun_lon = float(payload["sun_lon"])
     moon_lon = float(payload["moon_lon"])
-    gulika_lon = float(payload.get("gulika_lon", calc_gulika_simple(asc_lon, sun_lon, int(payload.get("weekday", 0)))))
+    if "gulika_lon" not in payload:
+        return {
+            "status": "blocked",
+            "reason": "exact_gulika_longitude_required_for_adhana_scaffold",
+            "blocked_layers": ["Gulika", "Adhana candidate points"],
+        }
+    gulika_lon = float(payload["gulika_lon"])
 
     year = int(payload["year"])
     month = int(payload["month"])
diff --git a/scripts/prashna.py b/scripts/prashna.py
index c3b1dd6b..554eb6f0 100644
--- a/scripts/prashna.py
+++ b/scripts/prashna.py
@@ -810,10 +810,15 @@ def _planet_lon(planet_lons: Dict, planet: str, default: float = 0.0) -> float:
     return _norm(planet_lons.get(planet, default))
 
 
+class GulikaUnavailableError(RuntimeError):
+    """Raised when a caller asks for the retired approximate Gulika value."""
+
+
 def calc_gulika_simple(asc_lon: float, sun_lon: float = 0.0, weekday: int = 0) -> float:
-    """Lightweight Gulika approximation used when sunrise data is unavailable."""
-    weekday_offsets = [210, 180, 150, 120, 90, 60, 30]
-    return _norm((sun_lon or asc_lon) + weekday_offsets[weekday % 7])
+    """Retired: exact Gulika needs sunrise, sunset, weekday and birth segment."""
+    raise GulikaUnavailableError(
+        "approximate_gulika_removed_exact_day_segment_calculation_required"
+    )
 
 
 def calc_arudha(asc_lon: float, planet_lons: Dict) -> Dict:
@@ -862,7 +867,13 @@ def calc_sphutas(planet_lons: Dict, asc_lon: float = 0.0) -> Dict:
 
 
 def calc_life_sphutas(asc_lon: float, moon_lon: float, sun_lon: float, gulika_lon: float = 0.0) -> Dict:
-    gulika = _norm(gulika_lon or calc_gulika_simple(asc_lon, sun_lon))
+    if not gulika_lon:
+        return {
+            "status": "blocked",
+            "reason": "exact_gulika_longitude_required_for_life_sphutas",
+            "blocked_layers": ["Gulika", "Prana", "Deha", "Mrityu"],
+        }
+    gulika = _norm(gulika_lon)
     prana = _norm(asc_lon * 5 + gulika)
     deha = _norm(moon_lon * 8 + gulika)
     mrityu = _norm(gulika * 7 + sun_lon)
diff --git a/scripts/technique_registry.py b/scripts/technique_registry.py
index 013dfc72..b6896788 100644
--- a/scripts/technique_registry.py
+++ b/scripts/technique_registry.py
@@ -367,8 +367,8 @@ def _register_existing_techniques():
                      TechniqueLevel.L2_STANDARD, TechniqueStatus.STABLE,
                      module_path="synastry.py", compute_func="calc_synastry"),
         TechniqueSpec("prashna", "问事系统", TechniqueCategory.PRASHNA,
-                     TechniqueLevel.L2_STANDARD, TechniqueStatus.BETA,
-                     module_path="prashna.py", compute_func="cast_prashna"),
+                     TechniqueLevel.L2_STANDARD, TechniqueStatus.WIP,
+                     module_path="prashna_context.py", compute_func="build_prashna_context"),
         
         # L3 高级技法（部分已有）
         TechniqueSpec("vimsopaka", "20分力量", TechniqueCategory.NATAL,
diff --git a/tests/test_adhana.py b/tests/test_adhana.py
index 7c2d37c6..99f34b43 100644
--- a/tests/test_adhana.py
+++ b/tests/test_adhana.py
@@ -20,7 +20,7 @@ def sample_birth_payload():
         "moon_lon": 311.78995555555554,
         "gulika_lon": 256.581676,
         "weekday": 6,
-        "year": REDACTED_YEAR,
+        "year": 1990,
         "month": 4,
         "day": 17,
         "hour": 14,
diff --git a/tests/test_api_server_security.py b/tests/test_api_server_security.py
index a701f10f..c4fb0362 100644
--- a/tests/test_api_server_security.py
+++ b/tests/test_api_server_security.py
@@ -954,7 +954,7 @@ def test_prashna_advanced_legacy_functions_exist() -> None:
     assert prashna.cast_prashna('2026-06-22 12:00', 28.6, 77.2)['status'] == 'blocked'
     assert prashna.calc_arudha(15.5, planet_lons)['arudha_house']
     assert prashna.calc_sphutas(planet_lons, 15.5)['status'] == 'blocked'
-    assert prashna.calc_life_sphutas(15.5, 70, 10)['signal']
+    assert prashna.calc_life_sphutas(15.5, 70, 10)['status'] == 'blocked'
     assert prashna.calc_sahams(planet_lons, 15.5)['status'] == 'blocked'
     assert prashna.analyze_lost_item(planet_lons, 15.5)['summary']
     assert prashna.kunda_verify(15.5)['status'] == 'blocked'