diff --git a/frontend/src/lib/consultation-evidence-card.ts b/frontend/src/lib/consultation-evidence-card.ts
index 907ab3c5..2d0f917e 100644
--- a/frontend/src/lib/consultation-evidence-card.ts
+++ b/frontend/src/lib/consultation-evidence-card.ts
@@ -490,7 +490,7 @@ const DOUBLE_TRANSIT_ROW_KEYS = ["layer", "target", "strength", "jupiter_pac", "
 const DOUBLE_TRANSIT_ALL_KEYS = ["house", "layer", "target", "strength"] as const;
 const KARAKA_TARGET_KEYS = ["target", "jupiter_pac", "saturn_pac", "double_transit"] as const;
 const ANNUAL_KEYS = [
-  "status", "varsha_year", "annual_lagna", "varshesha", "muntha", "mudda_dasha", "tajika_aspects", "boundary",
+  "status", "varsha_year", "annual_lagna", "varshesha", "varshesha_basis", "muntha", "mudda_dasha", "tajika_aspects", "boundary",
 ] as const;
 
 function nonEmpty(value: JsonRecord) {
diff --git a/frontend/src/mastra/consultation-workflow.ts b/frontend/src/mastra/consultation-workflow.ts
index 1c09d588..524d00bf 100644
--- a/frontend/src/mastra/consultation-workflow.ts
+++ b/frontend/src/mastra/consultation-workflow.ts
@@ -548,6 +548,8 @@ const nativeDoubleTransitKeys = new Set([
 ]);
 const nativeAnnualKeys = new Set([
   "status", "reason", "source", "targetyear", "age", "varshayear", "start", "end", "annuallagna", "varshesha",
+  // BUG-1212: how the year lord was chosen (Muntha lord for now; Panchavargiya pending).
+  "varsheshabasis",
   "muntha", "sign", "lord", "houseinannualchart", "houseinnatalchart", "muddadasha", "months",
   "tajikaaspects", "name", "planets", "aspect", "motion", "tajikaaspectsstatus", "producers",
   "solarreturn", "annualchart", "yearlord", "tajikayogas", "boundary",
diff --git a/scripts/consultation_native_layers.py b/scripts/consultation_native_layers.py
index 13837e20..33ca3345 100644
--- a/scripts/consultation_native_layers.py
+++ b/scripts/consultation_native_layers.py
@@ -71,6 +71,12 @@ YOGA_PACKET_DOMAINS = {
     "raman_bvr_relationship_mother_batch_closure_packet_2026_08_20.json": "parents",
     "raman_bvr_relationship_sibling_core_batch_closure_packet_2026_08_20.json": "siblings",
 }
+# BUG-1212 (ruling 甲11): the year lord shown is the Muntha sign lord; the
+# astrologer's rule is Panchavargiya (strongest of five office-bearers), whose
+# native producer is still blocked. Shown wherever the year lord is shown.
+YEAR_LORD_BASIS = "暂用 Muntha 主星；占星师口径为 Panchavargiya，待接入"
+YEAR_LORD_BASIS_EN = "Muntha sign lord for now; the astrologer's rule is Panchavargiya, not yet wired"
+
 TAJIKA_BOUNDARY = (
     "parameter_sensitive: Tajika / Varshaphala is verified on the first target set only, "
     "not a global closure; annual structure, not an event verdict"
@@ -944,6 +950,7 @@ def build_annual_tajika(birth_payload: dict, chart: dict, *, reference: datetime
         "varsha_year": {"start": start.strftime("%Y-%m-%d"), "end": end.strftime("%Y-%m-%d")},
         "annual_lagna": annual_chart.get("asc_sign"),
         "varshesha": year_lord,
+        "varshesha_basis": YEAR_LORD_BASIS,
         "muntha": {
             "sign": muntha.get("muntha_sign"),
             "lord": muntha.get("muntha_lord"),
diff --git a/scripts/pl9_reader_english_terms.py b/scripts/pl9_reader_english_terms.py
index c0e35c21..4c86c017 100644
--- a/scripts/pl9_reader_english_terms.py
+++ b/scripts/pl9_reader_english_terms.py
@@ -147,6 +147,7 @@ _PHRASES: dict[str, str] = {
     "| 要素总数 |": "| Total elements |",
     # ── annual labels and values ──
     "Muntha 所在星座的守护星（当前本地口径）": "Ruler of the Muntha sign (current local method)",
+    "暂用 Muntha 主星；占星师口径为 Panchavargiya，待接入": "Muntha sign lord for now; the astrologer's rule is Panchavargiya, not yet wired",
     "两种计算口径给出的年主不同，暂不合并": "The two methods give different year lords; not merged",
     "（两者不同）": " (they differ)",
     "太阳返照": "Solar return",
diff --git a/scripts/pl9_reader_export.py b/scripts/pl9_reader_export.py
index 59867b25..38907323 100644
--- a/scripts/pl9_reader_export.py
+++ b/scripts/pl9_reader_export.py
@@ -580,7 +580,8 @@ def render_pl9_parity_markdown(packet: dict) -> str:
         if data.get('selection_basis'):
             return _cell(data['selection_basis'])
         if data.get('year_lord') and data['year_lord'] == muntha_data.get('muntha_lord'):
-            return 'Muntha 所在星座的守护星（当前本地口径）'
+            # BUG-1212 (甲11): say plainly that this is a stand-in for Panchavargiya.
+            return '暂用 Muntha 主星；占星师口径为 Panchavargiya，待接入'
         return '-'
 
     def _degree(value) -> str:
@@ -2297,6 +2298,7 @@ def render_pl9_parity_markdown(packet: dict) -> str:
                 if year_lord_data:
                     lines.extend([
                         f"| Varshesha | {_cell(_annual_field_text(year_lord, 'year_lord', 'lord'))} |",
+                        f"| Selection basis | {_cell(_annual_selection_basis(year_lord, annual_pack.get('muntha')))} |",
                         f"| Muntha sign | {_cell(_annual_field_text(annual_pack.get('muntha'), 'muntha_sign'))} |",
                     ])
                 lines.append('')
diff --git a/tests/test_year_lord_basis_label.py b/tests/test_year_lord_basis_label.py
new file mode 100644
index 00000000..bf1c0eed
--- /dev/null
+++ b/tests/test_year_lord_basis_label.py
@@ -0,0 +1,68 @@
+"""Year lord is labelled as a Muntha-lord stand-in for Panchavargiya (BUG-1212).
+
+Astrologer rulings 2026-10-03 甲11: Muntha = natal Lagna + completed years
+(kept); year lord by Panchavargiya is not implemented (native producer blocked),
+so every surface that shows the year lord says so. Fictional chart.
+"""
+
+from __future__ import annotations
+
+import copy
+import re
+from datetime import datetime
+from pathlib import Path
+
+from scripts.consultation_native_layers import YEAR_LORD_BASIS, build_annual_tajika
+from scripts.pl9_reader_export import _pl9_export_markdown_for_edition
+from scripts.solar_return import SIGNS, solar_return_full_report
+from tests.test_report_english_edition import CASES, _packet
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_report_shows_the_basis_in_both_editions() -> None:
+    packet = _packet(CASES["day"])
+    zh = _pl9_export_markdown_for_edition(copy.deepcopy(packet), "reader_main")
+    english = copy.deepcopy(packet)
+    english["report_language"] = "en"
+    en = _pl9_export_markdown_for_edition(english, "reader_main")
+    assert zh.count("| Selection basis | 暂用 Muntha 主星；占星师口径为 Panchavargiya，待接入 |") >= 1
+    assert "| Selection basis | Muntha sign lord for now; the astrologer's rule is Panchavargiya, not yet wired |" in en
+    assert zh.count("| Varshesha |") == zh.count("| Selection basis |")
+
+
+def test_consultation_annual_card_carries_the_basis() -> None:
+    case = CASES["day"]
+    payload = {key: case[key] for key in ("year", "month", "day", "hour", "minute", "second", "lat", "lon", "tz", "ayanamsa", "node_mode")}
+    from scripts.jyotish_engine import compute_chart_data
+    chart, *_ = compute_chart_data(case["year"], case["month"], case["day"], case["hour"], case["minute"],
+                                   case["lat"], case["lon"], case["tz"], ayanamsa_name=case["ayanamsa"])
+    annual = build_annual_tajika(payload, chart, reference=datetime(2026, 10, 3))
+    assert annual["status"] == "parameter_sensitive"
+    assert annual["varshesha_basis"] == YEAR_LORD_BASIS
+    card = (ROOT / "frontend/src/lib/consultation-evidence-card.ts").read_text(encoding="utf-8")
+    assert '"varshesha", "varshesha_basis"' in card
+    workflow = (ROOT / "frontend/src/mastra/consultation-workflow.ts").read_text(encoding="utf-8")
+    assert '"varsheshabasis"' in workflow
+
+
+def test_main_path_muntha_is_natal_lagna_plus_completed_years() -> None:
+    from scripts.jyotish_engine import compute_chart_data
+
+    case = CASES["day"]
+    report = solar_return_full_report(case["year"], case["month"], case["day"], case["hour"], case["minute"],
+                                      case["lat"], case["lon"], case["tz"], 2026, ayanamsa_name="raman")
+    _chart, natal_asc, *_ = compute_chart_data(case["year"], case["month"], case["day"], case["hour"], case["minute"],
+                                               case["lat"], case["lon"], case["tz"], ayanamsa_name="raman")
+    muntha = report["muntha"]
+    completed = 2026 - case["year"]
+    assert (muntha["natal_asc_sign_idx"], muntha["age"]) == (natal_asc, completed)
+    assert muntha["muntha_sign_idx"] == (natal_asc + completed) % 12
+    assert muntha["muntha_sign"] == SIGNS[muntha["muntha_sign_idx"]]
+    assert report["year_lord"]["year_lord"] == muntha["muntha_lord"]
+
+
+def test_sun_sign_muntha_variant_is_off_the_main_path() -> None:
+    pattern = re.compile(r"^\s*(from\s+(scripts\.)?muntha\s+import|import\s+(scripts\.)?muntha\b)|_load_local_module\(['\"]muntha['\"]\)", re.MULTILINE)
+    offenders = [path.name for path in (ROOT / "scripts").glob("*.py") if path.name != "muntha.py" and pattern.search(path.read_text(encoding="utf-8"))]
+    assert offenders == []