diff --git a/old_code/B09_Estimation/B09_Estimation_UnitPrice.py b/old_code/B09_Estimation/B09_Estimation_UnitPrice.py
index 9c06a591..1a50e0a2 100644
--- a/old_code/B09_Estimation/B09_Estimation_UnitPrice.py
+++ b/old_code/B09_Estimation/B09_Estimation_UnitPrice.py
@@ -500,19 +500,23 @@ def _add_machine_layers(
 
 @lru_cache(maxsize=1)
 def load_basis_missing(
-    file_name: str = "2_공종_산림_밑수없음_2026-01-01.json",
+    file_name: str = "기준수량없음_산림품셈_2026-01-01.json",
 ) -> dict[str, str]:
     """B08 이 낸 **밑수 못 찾은 표** 목록 — `{표 번호: 절 이름}`.
 
     「10㎡당」 같은 기준을 원문에서 못 찾은 표다. 1 단위당으로 단정하면 곱셈이
     10배·100배 틀리므로(떼채취가 실제로 100배였다) 그 표를 쓰는 공종은
     **금액을 안 만든다**.
+
+    2026-09-22 — old/ 스냅샷 대신 최상위 마스터로 옮김(PLAN 7-5 ⑤ · 브레인 판정).
+    ⚠ `root` 계산이 파일이 `old_code/` 로 옮겨진 뒤(PLAN 7-3) 한 단 부족해 있었음 —
+    조용히 빈 딕셔너리를 돌려주던 것을 여기서 같이 바로잡음(3단 위가 프로젝트 뿌리).
     """
     import json
     import os
 
-    root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-    path = os.path.join(root, "resources", "master_data", "old", file_name)
+    root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+    path = os.path.join(root, "resources", "master_data", file_name)
     if not os.path.exists(path):
         return {}
     with open(path, encoding="utf-8") as handle:
diff --git a/common_util/common_util_aliases.py b/old_code/common_util/common_util_aliases.py
similarity index 99%
rename from common_util/common_util_aliases.py
rename to old_code/common_util/common_util_aliases.py
index 119d8aef..b6d3a1e1 100644
--- a/common_util/common_util_aliases.py
+++ b/old_code/common_util/common_util_aliases.py
@@ -22,10 +22,10 @@ from pathlib import Path
 from typing import Any
 
 ALIAS_FILE = (
-    Path(__file__).resolve().parents[1]
+    Path(__file__).resolve().parents[2]
     / "resources"
     / "master_data"
-    / "ref"
+    / "old"
     / "공종_자원별칭_실무_2026-01-01.json"
 )
 AXES = frozenset({"resource", "variant"})
diff --git a/common_util/common_util_work_item_key.py b/old_code/common_util/common_util_work_item_key.py
similarity index 97%
rename from common_util/common_util_work_item_key.py
rename to old_code/common_util/common_util_work_item_key.py
index d5e7e531..48a1d1a7 100644
--- a/common_util/common_util_work_item_key.py
+++ b/old_code/common_util/common_util_work_item_key.py
@@ -20,7 +20,7 @@ from functools import lru_cache
 from pathlib import Path
 from typing import Any, Iterable
 
-MASTER_DIR = Path(__file__).resolve().parent.parent / "resources" / "master_data" / "old"
+MASTER_DIR = Path(__file__).resolve().parent.parent.parent / "resources" / "master_data" / "old"
 #: 우리가 세운 공종·구조물 — 난수 코드가 곧 불변 열쇠
 _STABLE_CODE = re.compile(r"^AX-(?:WK|ST)-[0-9a-f]{8}$")
 
diff --git a/common_util/common_util_work_item_link.py b/old_code/common_util/common_util_work_item_link.py
similarity index 97%
rename from common_util/common_util_work_item_link.py
rename to old_code/common_util/common_util_work_item_link.py
index a86783e6..5c22ab86 100644
--- a/common_util/common_util_work_item_link.py
+++ b/old_code/common_util/common_util_work_item_link.py
@@ -19,7 +19,7 @@ from functools import lru_cache
 from pathlib import Path
 from typing import Any
 
-FOLDER = Path(__file__).resolve().parent.parent / "resources" / "master_data" / "old"
+FOLDER = Path(__file__).resolve().parent.parent.parent / "resources" / "master_data" / "old"
 CONFIRMED = "확정"
 #: 표 `policy.both_precedence` 낱말 → 그 행의 열쇠 칸
 _KEY_COLUMN = {"forest": "forest_key", "construction": "const_key"}
diff --git a/resources/tester/test_b08_root_removal_excavator.py b/old_code/resources/tester/test_b08_root_removal_excavator.py
similarity index 100%
rename from resources/tester/test_b08_root_removal_excavator.py
rename to old_code/resources/tester/test_b08_root_removal_excavator.py
diff --git a/resources/tester/test_b09_fuel_kind_vibrator.py b/old_code/resources/tester/test_b09_fuel_kind_vibrator.py
similarity index 100%
rename from resources/tester/test_b09_fuel_kind_vibrator.py
rename to old_code/resources/tester/test_b09_fuel_kind_vibrator.py
diff --git a/resources/master_data/ref/_열목록_화면표.csv b/resources/master_data/old/_열목록_화면표.csv
similarity index 100%
rename from resources/master_data/ref/_열목록_화면표.csv
rename to resources/master_data/old/_열목록_화면표.csv
diff --git a/resources/master_data/_원문목록.json b/resources/master_data/old/_원문목록.json
similarity index 100%
rename from resources/master_data/_원문목록.json
rename to resources/master_data/old/_원문목록.json
diff --git a/resources/master_data/ref/공종_수량연결_실무_2026-01-01.json b/resources/master_data/old/공종_수량연결_실무_2026-01-01.json
similarity index 100%
rename from resources/master_data/ref/공종_수량연결_실무_2026-01-01.json
rename to resources/master_data/old/공종_수량연결_실무_2026-01-01.json
diff --git a/resources/master_data/ref/공종_자원별칭_실무_2026-01-01.json b/resources/master_data/old/공종_자원별칭_실무_2026-01-01.json
similarity index 100%
rename from resources/master_data/ref/공종_자원별칭_실무_2026-01-01.json
rename to resources/master_data/old/공종_자원별칭_실무_2026-01-01.json
diff --git a/resources/master_data/ref/수량_구조물원단위_울진_2026-01-01.json b/resources/master_data/old/수량_구조물원단위_울진_2026-01-01.json
similarity index 100%
rename from resources/master_data/ref/수량_구조물원단위_울진_2026-01-01.json
rename to resources/master_data/old/수량_구조물원단위_울진_2026-01-01.json
diff --git a/resources/master_data/ref/수량_돌쌓기찰라이브러리_소광리_2026-01-01.json b/resources/master_data/old/수량_돌쌓기찰라이브러리_소광리_2026-01-01.json
similarity index 100%
rename from resources/master_data/ref/수량_돌쌓기찰라이브러리_소광리_2026-01-01.json
rename to resources/master_data/old/수량_돌쌓기찰라이브러리_소광리_2026-01-01.json
diff --git a/resources/master_data/ref/품셈_산림_돌종류계수_울진_2026-01-01.json b/resources/master_data/old/품셈_산림_돌종류계수_울진_2026-01-01.json
similarity index 100%
rename from resources/master_data/ref/품셈_산림_돌종류계수_울진_2026-01-01.json
rename to resources/master_data/old/품셈_산림_돌종류계수_울진_2026-01-01.json
diff --git a/resources/master_data/ref/품셈_산림_재료할증_울진_2026-01-01.json b/resources/master_data/old/품셈_산림_재료할증_울진_2026-01-01.json
similarity index 100%
rename from resources/master_data/ref/품셈_산림_재료할증_울진_2026-01-01.json
rename to resources/master_data/old/품셈_산림_재료할증_울진_2026-01-01.json
diff --git a/resources/master_data/scripts/check_master.py b/resources/master_data/scripts/check_master.py
index 6f2193b2..264b402a 100644
--- a/resources/master_data/scripts/check_master.py
+++ b/resources/master_data/scripts/check_master.py
@@ -62,6 +62,8 @@ DIVISIONS = {
 _FILE = re.compile(
     rf"^(?:(인력|기계)|({'|'.join(mf.GROUPS)})_({'|'.join(BOOKS)})(?:_(\d\d)장_(.+))?)\.json$"
 )
+#: 8장 틀에 안 맞는 특수 최상위 파일(표·요소가 아닌 다른 모양) — 틀 검사에서 뺌(PLAN 7-5 ⑤).
+SPECIAL_FILES = {"기준수량없음_산림품셈_2026-01-01.json"}
 _SOURCE = re.compile(
     rf"^(?:자체|(?:{'|'.join(b for b in BOOKS if b not in ('건설품셈', '자체'))})(?:\s\S.*)?|건설품셈 (?:{'|'.join(DIVISIONS)}) \S.*)$"
 )
@@ -253,6 +255,8 @@ def check_combo_form(name: str, data: dict) -> list[str]:
 def check_form(name: str, data: dict) -> list[str]:
     if name == mcb.FILE:
         return check_combo_form(name, data)
+    if name in SPECIAL_FILES:
+        return []
     m = _FILE.match(name)
     if not m:
         return [
diff --git a/resources/master_data/old/2_공종_산림_밑수없음_2026-01-01.json b/resources/master_data/기준수량없음_산림품셈_2026-01-01.json
similarity index 100%
rename from resources/master_data/old/2_공종_산림_밑수없음_2026-01-01.json
rename to resources/master_data/기준수량없음_산림품셈_2026-01-01.json