From 0714e9653e77102693fe31c155e9681932e703c3 Mon Sep 17 00:00:00 2001
From: umsangdon <umsangdon@gmail.com>
Date: Sun, 18 Oct 2026 16:20:03 +0900
Subject: [PATCH] =?UTF-8?q?feat(B05=20=EC=A2=85=EB=8B=A8):=20=EC=A2=85?=
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- config 기본 L 20 · 초기값 직선 문턱 500 m ↔ TS `logic/B05_Profile_Profile_CurveLaw.ts` 상수 짝
- 초기값(1차 지반 종단 · 추천 [적용])만 정책 `no_curve_keys` 로 얼림 · 손 편집 · R 이면 기본 곡선
- 법정 종단곡선 최소 R · L 미달 = 경고 글(파이썬 · TS 같은 글) + 종단 요약줄 「종단곡선 미달」
- 노선 [저장]은 옛 정책(L · 열쇠) 이어받음 · 바뀐 자리 새 꼭짓점만 새 지반 열쇠(`carry_policy` ↔ `carryNoCurveKeys`)
- 시험 test_432_1 + 헬퍼 스텁 넷

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XWh5wNNycMkbwMpACz1rte
---
 .../B05_Profile_Engine_Grade_Alignment.py     |  29 +-
 B05_Profile/B05_Profile_Engine_Grade_Carry.py |  49 +++
 .../B05_Profile_Engine_Grade_CurveLaw.py      |  56 ++++
 .../B05_Profile_Engine_Grade_Profile.py       |  18 +-
 B05_Profile/B05_Profile_Route_Save.py         |   8 +-
 .../B05_Profile_Router_RouteInitial.py        |   7 +
 B05_Profile/B05_Profile_UI_Profile_Balance.ts |   5 +
 B05_Profile/logic/B05_Profile_Grade_Carry.ts  |  24 ++
 B05_Profile/logic/B05_Profile_Grade_Ground.ts |  20 +-
 .../logic/B05_Profile_Pipeline_Grade.ts       |  38 ++-
 .../logic/B05_Profile_Profile_CurveLaw.ts     |  70 +++++
 .../logic/B05_Profile_UI_Profile_Alignment.ts |   7 +
 config/config_system_design.py                |   6 +-
 .../tester/helper_234_1_structure_station.cjs |   2 +
 resources/tester/helper_344_2_route_pairs.cjs |   3 +
 resources/tester/helper_349_0v_span.cjs       |   2 +
 resources/tester/helper_400_profile_carry.cjs |   4 +
 resources/tester/helper_432_1_curve_law.cjs   |  67 ++++
 resources/tester/test_432_1_curve_law.py      | 289 ++++++++++++++++++
 19 files changed, 689 insertions(+), 15 deletions(-)
 create mode 100644 B05_Profile/B05_Profile_Engine_Grade_CurveLaw.py
 create mode 100644 B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts
 create mode 100644 resources/tester/helper_432_1_curve_law.cjs
 create mode 100644 resources/tester/test_432_1_curve_law.py

diff --git a/B05_Profile/B05_Profile_Engine_Grade_Alignment.py b/B05_Profile/B05_Profile_Engine_Grade_Alignment.py
index 9cba2cb6f..63b83395d 100644
--- a/B05_Profile/B05_Profile_Engine_Grade_Alignment.py
+++ b/B05_Profile/B05_Profile_Engine_Grade_Alignment.py
@@ -23,6 +23,7 @@ from typing import Any
 
 import numpy as np
 
+from B05_Profile.B05_Profile_Engine_Grade_CurveLaw import vertical_curve_shortfalls
 from config.config_system import FOREST_ROAD_PROFILE_ALIGNMENT, FOREST_ROAD_PROFILE_CRITERIA
 
 ALIGNMENT_SCHEMA_VERSION = 1
@@ -69,6 +70,12 @@ class AlignmentPolicy:
     min_plan_radius_m: float = 0.0
     #: 배향곡선 하한(m) — 이보다 급하면 경고만 낸다.
     hairpin_min_radius_m: float = 0.0
+    #: 설계속도별 종단곡선 최소 R · L(m) — 미달 경고만(432 · 별표2 마.). 0이면 판정 안 함.
+    min_vertical_radius_m: float = 0.0
+    min_curve_length_m: float = 0.0
+    #: 초기값에서 곡선을 두지 않은 꼭짓점 열쇠(432 · `initial_no_curve_keys`) — 손 편집 · R 이면
+    #: 곡선.
+    no_curve_keys: tuple[str, ...] = ()
 
     @classmethod
     def from_config(
@@ -79,6 +86,8 @@ class AlignmentPolicy:
         curve_skip_delta_pct: float,
         paved: bool,
         min_plan_radius_m: float = 0.0,
+        min_vertical_radius_m: float = 0.0,
+        min_curve_length_m: float = 0.0,
     ) -> "AlignmentPolicy":
         config = FOREST_ROAD_PROFILE_ALIGNMENT
         return cls(
@@ -97,6 +106,8 @@ class AlignmentPolicy:
             paved=bool(paved),
             min_plan_radius_m=float(min_plan_radius_m),
             hairpin_min_radius_m=float(FOREST_ROAD_PROFILE_CRITERIA["hairpin_min_radius_m"]),
+            min_vertical_radius_m=float(min_vertical_radius_m),
+            min_curve_length_m=float(min_curve_length_m),
         )
 
     @classmethod
@@ -134,6 +145,9 @@ class AlignmentPolicy:
             max_grade_pct=float(payload.get("max_grade_pct") or 9.0),
             curve_skip_delta_pct=float(payload.get("curve_skip_delta_pct") or 5.0),
             paved=bool(payload.get("paved", False)),
+            min_vertical_radius_m=float(payload.get("min_vertical_radius_m") or 0.0),
+            min_curve_length_m=float(payload.get("min_curve_length_m") or 0.0),
+            no_curve_keys=tuple(str(key) for key in payload.get("no_curve_keys") or ()),
         )
 
     @property
@@ -164,6 +178,9 @@ class AlignmentPolicy:
             # 평면 곡선 판정값 — 화면 위반 표시가 쓴다(2026-09-06).
             "min_plan_radius_m": self.min_plan_radius_m,
             "hairpin_min_radius_m": self.hairpin_min_radius_m,
+            "min_vertical_radius_m": self.min_vertical_radius_m,
+            "min_curve_length_m": self.min_curve_length_m,
+            "no_curve_keys": list(self.no_curve_keys),
         }
 
 
@@ -293,6 +310,7 @@ def build_curves(
     curve_radii: dict[str, float] | None = None,
     *,
     only_explicit: bool = False,
+    edited: frozenset[str] = frozenset(),
 ) -> tuple[list[dict[str, Any]], list[str]]:
     """각 변화점에 대칭 종단곡선을 삽입하고 곡선 제원을 만든다.
 
@@ -321,6 +339,9 @@ def build_curves(
             continue  # 직선 판정 한 벌(426)
         if only_explicit and overrides.get(key) is None:
             continue
+        # 초기값 직선 꼭짓점(432) — 사용자가 고치거나(`edited`) R 을 넣기 전까지 곡선 없음
+        if key in policy.no_curve_keys and key not in edited and overrides.get(key) is None:
+            continue
         # 법정 다-(3)-(다)는 "종단곡선을 두지 않을 수 있다"는 허용 조항이다.
         # 실무 도면은 대수차가 작아도 변화점을 원곡선으로 처리하므로, 기본은 곡선을
         # 삽입하고 생략 가능 구간이라는 표시만 남긴다(config로 실제 생략 전환 가능).
@@ -518,8 +539,14 @@ def build_alignment(
     station_offsets, curve_radii = snapped["station_offsets"], snapped["curve_radii"]
 
     pvi_s, pvi_z, sources = resolve_pvi(base_s, base_z, station_offsets)
+    edited = frozenset(
+        chainage_key(s) for s, source in zip(pvi_s.tolist(), sources) if source == "user"
+    )
     curves, warnings = build_curves(
-        pvi_s, pvi_z, policy, curve_radii, only_explicit=only_explicit_curves
+        pvi_s, pvi_z, policy, curve_radii, only_explicit=only_explicit_curves, edited=edited
+    )
+    warnings += vertical_curve_shortfalls(
+        curves, policy.min_vertical_radius_m, policy.min_curve_length_m
     )
     segments = _segments(pvi_s, pvi_z)
     # 샘플 격자에 변화점(PVI)과 종단곡선 시·종점(BVC/EVC)을 합쳐서 평가한다. 격자만 쓰면
diff --git a/B05_Profile/B05_Profile_Engine_Grade_Carry.py b/B05_Profile/B05_Profile_Engine_Grade_Carry.py
index 7e30d522d..713faf628 100644
--- a/B05_Profile/B05_Profile_Engine_Grade_Carry.py
+++ b/B05_Profile/B05_Profile_Engine_Grade_Carry.py
@@ -205,3 +205,52 @@ def carry_edits(
         gaps[slot] = best
         out["curve_radii"][slot] = float(value)
     return out
+
+
+def carry_no_curve_keys(
+    old_xy: list[tuple[float, float]],
+    new_xy: list[tuple[float, float]],
+    old_keys: list[str],
+    ground_keys: list[str],
+    ground_pvi: list[dict[str, float]],
+    tol_m: float = SAME_LINE_TOL_M,
+) -> list[str]:
+    """새 꼭짓점의 초기값 직선 열쇠(432) — 같은 자리면 옛 꼭짓점 열쇠(꼭짓점 위일 때만) ·
+    바뀐 자리면 새 지반 첫 계획선 열쇠. 초기값만 · 그 뒤는 사용자 몫(요구 262)."""
+    match = line_matcher(old_xy, new_xy, tol_m)
+    old = [float(key) for key in old_keys]
+    ground = set(ground_keys)
+    out = []
+    for node in ground_pvi:
+        key = chainage_key(float(node["chainage_m"]))
+        s = match(float(node["chainage_m"]))
+        if (s is None and key in ground) or (
+            s is not None and any(abs(s - value) < _ON_NODE_M for value in old)
+        ):
+            out.append(key)
+    return out
+
+
+def carry_policy(
+    old_xy: list[tuple[float, float]],
+    new_xy: list[tuple[float, float]],
+    old_alignment: dict[str, Any],
+    new_alignment: dict[str, Any],
+) -> dict[str, Any]:
+    """노선 [저장] 정책(432) — 새 정책에 옛 기본 L · 옮긴 직선 열쇠 · 옛 정책 없으면 새 정책."""
+    new_policy = dict(new_alignment.get("policy") or {})
+    old_policy = old_alignment.get("policy") or {}
+    if not old_policy:
+        return new_policy
+    keys = carry_no_curve_keys(
+        old_xy,
+        new_xy,
+        list(old_policy.get("no_curve_keys") or []),
+        list(new_policy.get("no_curve_keys") or []),
+        list(new_alignment.get("base_pvi") or []),
+    )
+    return {
+        **new_policy,
+        "default_curve_length_m": old_policy.get("default_curve_length_m"),
+        "no_curve_keys": keys,
+    }
diff --git a/B05_Profile/B05_Profile_Engine_Grade_CurveLaw.py b/B05_Profile/B05_Profile_Engine_Grade_CurveLaw.py
new file mode 100644
index 000000000..ce984cb18
--- /dev/null
+++ b/B05_Profile/B05_Profile_Engine_Grade_CurveLaw.py
@@ -0,0 +1,56 @@
+"""B05 종단곡선 초기값 직선 · 법정 미달 판정(432 · 요구 262).
+
+- `initial_no_curve_keys` : 초기값(자동설계 체인 · 추천 [적용]으로 처음 만드는 종단)에서만 — 기본 L
+  기준 R 이 `initial_straight_radius_m`(500 m)보다 큰(대수차 L/R 안쪽) 꼭짓점 열쇠. 정책
+  `no_curve_keys` 로 저장돼 그 꼭짓점엔 종단곡선을 두지 않음 · 사용자가 그 꼭짓점을 고치거나 R 을
+  넣으면 다시 곡선(`build_curves`). 꼭짓점 높이는 그대로.
+- `vertical_curve_shortfalls` : 설계속도별 종단곡선 최소 R · L 미달(지식DB 별표2 마.) — 막지 않고
+  경고만 · 비포장 대수차 5 % 이하(생략 가능)는 뺌 · 45 % 규칙으로 줄어든 곡선도 같은 잣대.
+
+짝: TS `logic/B05_Profile_Profile_CurveLaw.ts` — 거울 시험 `test_432_1_curve_law.py`.
+"""
+
+from typing import Any
+
+import numpy as np
+
+from config.config_system import FOREST_ROAD_PROFILE_ALIGNMENT
+
+# 초기값 직선 문턱 R(m) — TS `INITIAL_STRAIGHT_RADIUS_M` 과 같은 값.
+INITIAL_STRAIGHT_RADIUS_M = float(FOREST_ROAD_PROFILE_ALIGNMENT["initial_straight_radius_m"])
+
+
+def initial_no_curve_keys(
+    base_s: np.ndarray, base_z: np.ndarray, curve_length_m: float | None
+) -> tuple[str, ...]:
+    """안쪽 꼭짓점 중 기본 L 기준 R > 500 m(|대수차| < L/500) 인 것의 열쇠(소수 3자리)."""
+    if not curve_length_m or len(base_s) < 3:
+        return ()
+    limit = float(curve_length_m) / INITIAL_STRAIGHT_RADIUS_M
+    spans = base_s[1:] - base_s[:-1]
+    grades = (base_z[1:] - base_z[:-1]) / np.where(spans > 0, spans, 1.0)
+    keys = []
+    for index in range(1, len(base_s) - 1):
+        if abs(float(grades[index] - grades[index - 1])) < limit:
+            keys.append(f"{float(base_s[index]):.3f}")
+    return tuple(keys)
+
+
+def vertical_curve_shortfalls(
+    curves: list[dict[str, Any]], min_radius_m: float, min_length_m: float
+) -> list[str]:
+    """법정 최소 R · L 을 못 채운 종단곡선 경고 글(누가거리 순) — 기준 0 이면 판정 안 함."""
+    if min_radius_m <= 0 and min_length_m <= 0:
+        return []
+    out = []
+    for curve in curves:
+        if curve.get("omitted") or curve.get("skip_allowed"):
+            continue
+        radius = float(curve.get("radius_m", curve.get("r_m", 0.0)))
+        length = float(curve.get("length_m", curve.get("l_m", 0.0)))
+        if radius < min_radius_m - 1e-6 or length < min_length_m - 1e-6:
+            out.append(
+                f"{float(curve['chainage_m']):.1f}m: 종단곡선 R {radius:.0f}m · L {length:.1f}m — "
+                f"법정 최소 R {min_radius_m:.0f}m · L {min_length_m:.0f}m 미달"
+            )
+    return out
diff --git a/B05_Profile/B05_Profile_Engine_Grade_Profile.py b/B05_Profile/B05_Profile_Engine_Grade_Profile.py
index 45b181dd2..e303aaf6a 100644
--- a/B05_Profile/B05_Profile_Engine_Grade_Profile.py
+++ b/B05_Profile/B05_Profile_Engine_Grade_Profile.py
@@ -27,6 +27,7 @@
 """
 
 from collections import Counter
+from dataclasses import replace
 from typing import Any
 
 import numpy as np
@@ -45,6 +46,7 @@ from B05_Profile.B05_Profile_Engine_Grade_Alignment import (
     chainage_key,
     evaluate,
 )
+from B05_Profile.B05_Profile_Engine_Grade_CurveLaw import initial_no_curve_keys
 from B05_Profile.B05_Profile_Engine_Grade_Solver import (
     grade_limits,
     integration_weights,
@@ -181,7 +183,8 @@ def design_ground_following_profile(
 
     규칙(2026-09-02 사용자 확정 + 2026-09-03 종단곡선 복원):
       - **모든 측점이 변화점**이고 그 자리 계획고는 지반고 그대로다. 절·성토가 거의 0이다.
-      - **변화점마다 종단곡선을 넣는다.** 직선과 직선 사이에는 반드시 호가 있고, 호는
+      - **변화점마다 종단곡선을 넣는다**(432: 기본 L 기준 R > 500 m 꼭짓점은 빼고 · 정책
+        `no_curve_keys`). 직선과 직선 사이에는 반드시 호가 있고, 호는
         변화점 대칭이라 **호의 중심이 측점 세로선 위**에 놓이며 좌우 직선과 접선을 이룬다.
       - 대칭 종단곡선은 꼭짓점을 지나지 않으므로 **호와 측점 세로선의 교점이 지반고**가
         되도록 꼭짓점 표고를 중앙종거만큼 밀어내며 반복 보정한다
@@ -207,6 +210,9 @@ def design_ground_following_profile(
         paved=options.paved,
         # 평면 최소곡선반지름은 화면 위반 표시에만 쓴다(2026-09-06) — 탐색 제약과 별개.
         min_plan_radius_m=legal_plan_radius_min_m(options.design_speed_kph, options.terrain_type),
+        # 종단곡선 최소 R · L — 미달 경고만(432)
+        min_vertical_radius_m=options.min_vertical_radius_m,
+        min_curve_length_m=options.min_curve_length_m,
     )
 
     warnings = list(options.warnings)
@@ -234,6 +240,10 @@ def design_ground_following_profile(
     if note:
         warnings.append(note)
 
+    # 초기값 직선(432) — 기본 L 기준 R > 500 m 꼭짓점은 곡선 없이(꼭짓점 = 지반고 그대로)
+    policy = replace(
+        policy, no_curve_keys=initial_no_curve_keys(base_s, base_z, policy.default_curve_length_m)
+    )
     base_z = pass_through(base_s, base_z, policy)
 
     alignment = build_alignment(
@@ -289,6 +299,9 @@ def design_pipe_anchored_profile(
         paved=options.paved,
         # 평면 최소곡선반지름은 화면 위반 표시에만 쓴다(2026-09-06) — 탐색 제약과 별개.
         min_plan_radius_m=legal_plan_radius_min_m(options.design_speed_kph, options.terrain_type),
+        # 종단곡선 최소 R · L — 미달 경고만(432)
+        min_vertical_radius_m=options.min_vertical_radius_m,
+        min_curve_length_m=options.min_curve_length_m,
     )
 
     warnings = list(options.warnings)
@@ -406,6 +419,9 @@ def design_alignment_profile(
         paved=options.paved,
         # 평면 최소곡선반지름은 화면 위반 표시에만 쓴다(2026-09-06) — 탐색 제약과 별개.
         min_plan_radius_m=legal_plan_radius_min_m(options.design_speed_kph, options.terrain_type),
+        # 종단곡선 최소 R · L — 미달 경고만(432)
+        min_vertical_radius_m=options.min_vertical_radius_m,
+        min_curve_length_m=options.min_curve_length_m,
     )
 
     warnings = list(options.warnings)
diff --git a/B05_Profile/B05_Profile_Route_Save.py b/B05_Profile/B05_Profile_Route_Save.py
index 887efd27d..a86e95be7 100644
--- a/B05_Profile/B05_Profile_Route_Save.py
+++ b/B05_Profile/B05_Profile_Route_Save.py
@@ -200,7 +200,12 @@ async def _carry_profile(
     new_xy: list[list[float]],
 ) -> None:
     """같은 자리(옆 1 m 안) 옛 계획고 · R 을 새 측점 위에 · 바뀐 자리만 새 지반 첫 계획선(400)."""
-    from B05_Profile.B05_Profile_Engine_Grade_Carry import carry_base, carry_edits, changed_span
+    from B05_Profile.B05_Profile_Engine_Grade_Carry import (
+        carry_base,
+        carry_edits,
+        carry_policy,
+        changed_span,
+    )
     from B05_Profile.B05_Profile_Repository import update_longitudinal_grade_summary
     from B05_Profile.B05_Profile_Router import _apply_alignment_edits
     from common_util.common_util_json import atomic_write_json
@@ -219,6 +224,7 @@ async def _carry_profile(
         half = float((alignment.get("policy") or {}).get("station_interval_m") or 20.0) / 2
         base = carry_base(old_xy, new_xy, old_base, alignment["base_pvi"])
         edits = carry_edits(old_xy, new_xy, old_base, old_alignment.get("edits"), stations, half)
+    alignment["policy"] = carry_policy(old_xy, new_xy, old_alignment, alignment)  # 옛 L · 열쇠(432)
     alignment["base_pvi"] = base
     await asyncio.to_thread(atomic_write_json, path, longitudinal)
     _alignment, summary, _dropped = await asyncio.to_thread(
diff --git a/B05_Profile/B05_Profile_Router_RouteInitial.py b/B05_Profile/B05_Profile_Router_RouteInitial.py
index c1cd2f766..55a0f53e3 100644
--- a/B05_Profile/B05_Profile_Router_RouteInitial.py
+++ b/B05_Profile/B05_Profile_Router_RouteInitial.py
@@ -360,6 +360,7 @@ def _set_base_pvi(path: Path, stations: list[float], plan: list[float]) -> int:
     import numpy as np
 
     from B05_Profile.B05_Profile_Engine_Grade_Alignment import AlignmentPolicy
+    from B05_Profile.B05_Profile_Engine_Grade_CurveLaw import initial_no_curve_keys
     from B05_Profile.B05_Profile_Engine_RouteInitial_Profile import held_pass_through
     from common_util.common_util_json import atomic_write_json
 
@@ -367,6 +368,12 @@ def _set_base_pvi(path: Path, stations: list[float], plan: list[float]) -> int:
     alignment = longitudinal["profile_alignment"]
     base = alignment["base_pvi"]
     base_s = np.array([float(item["chainage_m"]) for item in base])
+    # 초기값 직선(432) — 균형 종단에서 기본 L 기준 R > 500 m 꼭짓점은 곡선 없이
+    policy = AlignmentPolicy.from_dict(alignment["policy"])
+    keys = initial_no_curve_keys(
+        base_s, np.interp(base_s, stations, plan), policy.default_curve_length_m
+    )
+    alignment["policy"]["no_curve_keys"] = list(keys)
     # 1차 종단과 같은 맞춤 — 종단곡선을 넣어도 측점마다 균형 종단 계획고를 지나게 · 꼭짓점 사이
     # 직선은 균형 종단 상한 안(419-3)
     base_z = held_pass_through(
diff --git a/B05_Profile/B05_Profile_UI_Profile_Balance.ts b/B05_Profile/B05_Profile_UI_Profile_Balance.ts
index 5cbe53030..a6e054f9c 100644
--- a/B05_Profile/B05_Profile_UI_Profile_Balance.ts
+++ b/B05_Profile/B05_Profile_UI_Profile_Balance.ts
@@ -17,6 +17,7 @@
 import type { ProfileAlignment } from "./logic/B05_Profile_UI_Profile_Alignment";
 import type { MinCoverViolation } from "./B05_Profile_UI_Profile_MinCover";
 import { bentEditCount } from "./logic/B05_Profile_Profile_Straight";
+import { verticalCurveShortfalls } from "./logic/B05_Profile_Profile_CurveLaw";
 
 export interface BalanceBarParams {
   /** 표시줄 컨테이너. 그릴 때마다 통째로 갈아 끼운다. */
@@ -98,6 +99,9 @@ export function renderBalanceBar(params: BalanceBarParams): void {
   }
   // 필요한 곳이 없으면 적지 않는다 — "0곳"은 화면 폭만 먹는다.
   if (curvesNeeded) entries.push(["종단곡선 필요", `${curvesNeeded} 곳`, "over"]);
+  // 종단곡선 법정 최소 R · L 미달(별표2 마. · 432) — 막지 않고 경고만 · 내역은 툴팁
+  const shortfalls = verticalCurveShortfalls(alignment.curves, policy);
+  if (shortfalls.length) entries.push(["종단곡선 미달", `${shortfalls.length} 곳`, "over"]);
   // 횡단배수 최소고 표시는 2026-09-02 사용자 지시로 삭제했다. 편집 차단(강제)은
   // `B05_Profile_UI_Profile_Render.ts` 에 그대로 남아 있고 기본 해제다.
   const editedCount = bentEditCount(alignment); // 꺾인 편집 꼭짓점만(426)
@@ -110,6 +114,7 @@ export function renderBalanceBar(params: BalanceBarParams): void {
     item.append(caption, document.createTextNode(value));
     // 상한 초과 구간의 내역은 별도 경고 칩 대신 이 항목의 툴팁으로 붙인다 —
     // 같은 사실을 두 번 적지 않는다(2026-08-19 재편).
+    if (label === "종단곡선 미달") item.title = shortfalls.join("\n");
     if (label === "곡선반경 부족" && plan) {
       item.title = [
         `법정 하한 ${plan.limitM.toFixed(1)}m 미만인 측점 ${plan.count}곳`,
diff --git a/B05_Profile/logic/B05_Profile_Grade_Carry.ts b/B05_Profile/logic/B05_Profile_Grade_Carry.ts
index cb8f6a18b..7a01df662 100644
--- a/B05_Profile/logic/B05_Profile_Grade_Carry.ts
+++ b/B05_Profile/logic/B05_Profile_Grade_Carry.ts
@@ -238,3 +238,27 @@ export function carryEdits(
   });
   return out;
 }
+
+/**
+ * 새 꼭짓점의 초기값 직선 열쇠(432) — 같은 자리면 옛 꼭짓점 열쇠(꼭짓점 위일 때만) · 바뀐 자리면 새
+ * 지반 첫 계획선 열쇠(파이썬 `carry_no_curve_keys` 짝). 초기값만 · 그 뒤는 사용자 몫(요구 262).
+ */
+export function carryNoCurveKeys(
+  oldXy: ReadonlyArray<XY>,
+  newXy: ReadonlyArray<XY>,
+  oldKeys: ReadonlyArray<string>,
+  groundKeys: ReadonlyArray<string>,
+  groundPvi: ReadonlyArray<AlignmentNode>,
+  tolM: number = SAME_LINE_TOL_M,
+): string[] {
+  const match = lineMatcher(oldXy, newXy, tolM);
+  const old = oldKeys.map(Number);
+  const ground = new Set(groundKeys);
+  return groundPvi
+    .filter((node) => {
+      const s = match(node.chainage_m);
+      if (s === null) return ground.has(node.chainage_m.toFixed(3));
+      return old.some((value) => Math.abs(s - value) < ON_NODE_M);
+    })
+    .map((node) => node.chainage_m.toFixed(3));
+}
diff --git a/B05_Profile/logic/B05_Profile_Grade_Ground.ts b/B05_Profile/logic/B05_Profile_Grade_Ground.ts
index 374af92ae..866fc11d7 100644
--- a/B05_Profile/logic/B05_Profile_Grade_Ground.ts
+++ b/B05_Profile/logic/B05_Profile_Grade_Ground.ts
@@ -14,6 +14,7 @@ import {
   type AlignmentNode,
   type AlignmentPolicy,
 } from "./B05_Profile_UI_Profile_Alignment";
+import { initialNoCurveKeys } from "./B05_Profile_Profile_CurveLaw";
 
 /** 종단 지반 표본 한 점 — 저장 종단 `samples[]` 꼴. */
 export interface GroundSample {
@@ -83,6 +84,16 @@ export function passThrough(baseS: number[], target: number[], policy: Alignment
 
 /** 첫 계획선 꼭짓점(base_pvi · 0.000001 m) — 못 서는 땅이면 null(서버로 다시 셈). */
 export function groundFollowingBasePvi(input: GroundFollowingInput): AlignmentNode[] | null {
+  return groundFollowingPlan(input)?.pvi ?? null;
+}
+
+/**
+ * 첫 계획선 꼭짓점 + 초기값 직선 열쇠(432) — 기본 L 기준 R > 500 m 꼭짓점은 곡선 없이(꼭짓점 =
+ * 지반고 그대로) · 파이썬 `design_ground_following_profile` 의 `no_curve_keys` 짝.
+ */
+export function groundFollowingPlan(
+  input: GroundFollowingInput,
+): { pvi: AlignmentNode[]; noCurveKeys: string[] } | null {
   const profile = groundProfile(input.samples);
   if (!profile) return null;
   const { chainage, ground } = profile;
@@ -103,9 +114,14 @@ export function groundFollowingBasePvi(input: GroundFollowingInput): AlignmentNo
   const target = nodeS.map((s) => interp(chainage, ground, s));
   target[0] += input.startOffsetM ?? 0;
   target[target.length - 1] += input.endOffsetM ?? 0;
-  const baseZ = passThrough(nodeS, target, input.policy);
-  return nodeS.map((s, index) => ({
+  const noCurveKeys = initialNoCurveKeys(
+    nodeS.map((s, index) => ({ chainage_m: s, elevation_m: target[index] })),
+    input.policy.default_curve_length_m,
+  );
+  const baseZ = passThrough(nodeS, target, { ...input.policy, no_curve_keys: noCurveKeys });
+  const pvi = nodeS.map((s, index) => ({
     chainage_m: roundTo(s, 6),
     elevation_m: roundTo(baseZ[index], 6),
   }));
+  return { pvi, noCurveKeys };
 }
diff --git a/B05_Profile/logic/B05_Profile_Pipeline_Grade.ts b/B05_Profile/logic/B05_Profile_Pipeline_Grade.ts
index ccaa46872..f1fbef778 100644
--- a/B05_Profile/logic/B05_Profile_Pipeline_Grade.ts
+++ b/B05_Profile/logic/B05_Profile_Pipeline_Grade.ts
@@ -32,9 +32,16 @@ import {
   type AlignmentBase,
   type AlignmentEdits,
 } from "./B05_Profile_UI_Profile_Alignment";
-import { carryBase, carryEdits, changedSpan, type XY } from "./B05_Profile_Grade_Carry";
+import {
+  carryBase,
+  carryEdits,
+  carryNoCurveKeys,
+  changedSpan,
+  type XY,
+} from "./B05_Profile_Grade_Carry";
 import { SECTION_STATION_INTERVAL_M } from "./B05_Profile_Sections_Stations";
-import { groundFollowingBasePvi, groundProfile } from "./B05_Profile_Grade_Ground";
+import { groundFollowingPlan, groundProfile } from "./B05_Profile_Grade_Ground";
+import { DEFAULT_CURVE_LENGTH_M } from "./B05_Profile_Profile_CurveLaw";
 
 const xy = (line: ReadonlyArray<Vertex>): Array<{ x: number; y: number }> =>
   line.map(([x, y]) => ({ x, y }));
@@ -165,17 +172,30 @@ export function createPlanlineStage(deps: PlanlineDeps): StageFn<"planline"> {
     }));
     const profile = groundProfile(samples);
     if (!profile) return saved; // 못 서는 땅 — 저장 기준 그대로(서버가 [저장] 때 다시 셈)
-    const groundPvi =
-      groundFollowingBasePvi({
-        samples,
-        stations: ground.stations.map((station) => station.chainageM),
-        policy: saved.policy,
-      }) ?? [];
+    // 바뀐 자리 새 꼭짓점 = 서버 새 지반 첫 계획선(기본 L = config 짝 · 초기값 직선 열쇠 · 432)
+    const plan = groundFollowingPlan({
+      samples,
+      stations: ground.stations.map((station) => station.chainageM),
+      policy: { ...saved.policy, default_curve_length_m: DEFAULT_CURVE_LENGTH_M },
+    });
+    const groundPvi = plan?.pvi ?? [];
     const savedLine = deps.savedLine();
     const span = savedLine ? changedSpan(xy(savedLine), xy(route.line)) : null;
     const savedPvi = deps.storedPvi?.() ?? saved.basePvi;
     return {
-      policy: saved.policy,
+      // 이어받은 구간 = 옛 정책(L · 직선 열쇠) · 바뀐 자리 새 꼭짓점만 새 열쇠(서버 `carry_policy` 짝)
+      policy: span
+        ? {
+            ...saved.policy,
+            no_curve_keys: carryNoCurveKeys(
+              xy(savedLine!),
+              xy(route.line),
+              saved.policy.no_curve_keys ?? [],
+              plan?.noCurveKeys ?? [],
+              groundPvi,
+            ),
+          }
+        : saved.policy,
       onlyExplicitCurves: saved.onlyExplicitCurves,
       basePvi: span ? carryBase(xy(savedLine!), xy(route.line), savedPvi, groundPvi) : savedPvi,
       chainage: profile.chainage,
diff --git a/B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts b/B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts
new file mode 100644
index 000000000..9e1cfdb59
--- /dev/null
+++ b/B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts
@@ -0,0 +1,70 @@
+/* =============================================================================
+ * B05_Profile_Profile_CurveLaw.ts
+ * 종단곡선 초기값 직선 · 법정 미달 판정(432 · 요구 262).
+ *
+ * 짝: 파이썬 `B05_Profile_Engine_Grade_CurveLaw.py`(`initial_no_curve_keys` ·
+ * `vertical_curve_shortfalls`) · config `FOREST_ROAD_PROFILE_ALIGNMENT` 의 `default_curve_length_m` ·
+ * `initial_straight_radius_m` — 거울 시험 `test_432_1_curve_law.py`.
+ *
+ * - 초기값에서만 기본 L 기준 R > 500 m(|대수차| < L/500) 꼭짓점은 곡선 없음 — 정책 `no_curve_keys`
+ *   로 얼려 두고, 사용자가 그 꼭짓점을 고치거나(source "user") R 을 넣으면 다시 기본 곡선.
+ * - 법정 최소 R · L 미달은 막지 않고 경고 글만 · 비포장 대수차 5 % 이하(생략 가능)는 뺌.
+ * ========================================================================== */
+
+import type {
+  AlignmentCurve,
+  AlignmentNode,
+  AlignmentPolicy,
+} from "./B05_Profile_UI_Profile_Alignment";
+
+/** 기본 종단곡선 길이 L(m) — config `default_curve_length_m` 짝(새 정책에 담겨 옴 · 옛 저장분은 저장값). */
+export const DEFAULT_CURVE_LENGTH_M = 20;
+/** 초기값 직선 문턱 R(m) — config `initial_straight_radius_m` 짝. */
+export const INITIAL_STRAIGHT_RADIUS_M = 500;
+
+/** 안쪽 꼭짓점 중 기본 L 기준 R > 500 m 인 것의 열쇠(소수 3자리) — 파이썬 `initial_no_curve_keys`. */
+export function initialNoCurveKeys(
+  nodes: ReadonlyArray<AlignmentNode>,
+  curveLengthM: number | null | undefined,
+): string[] {
+  if (!curveLengthM || nodes.length < 3) return [];
+  const limit = curveLengthM / INITIAL_STRAIGHT_RADIUS_M;
+  const keys: string[] = [];
+  for (let index = 1; index < nodes.length - 1; index += 1) {
+    const [a, b, c] = [nodes[index - 1], nodes[index], nodes[index + 1]];
+    const spanIn = b.chainage_m - a.chainage_m;
+    const spanOut = c.chainage_m - b.chainage_m;
+    const gradeIn = (b.elevation_m - a.elevation_m) / (spanIn > 0 ? spanIn : 1);
+    const gradeOut = (c.elevation_m - b.elevation_m) / (spanOut > 0 ? spanOut : 1);
+    if (Math.abs(gradeOut - gradeIn) < limit) keys.push(b.chainage_m.toFixed(3));
+  }
+  return keys;
+}
+
+/** 초기값 직선 꼭짓점이라 곡선을 안 넣는가 — 사용자가 고친 꼭짓점 · R 지정이면 넣음. */
+export function skipsInitialCurve(
+  policy: AlignmentPolicy,
+  key: string,
+  node: AlignmentNode & { source?: string },
+  hasRequested: boolean,
+): boolean {
+  return !hasRequested && node.source !== "user" && (policy.no_curve_keys ?? []).includes(key);
+}
+
+/** 법정 최소 R · L 을 못 채운 종단곡선 경고 글 — 파이썬 `vertical_curve_shortfalls` 와 같은 글. */
+export function verticalCurveShortfalls(
+  curves: ReadonlyArray<AlignmentCurve>,
+  policy: AlignmentPolicy,
+): string[] {
+  const minR = policy.min_vertical_radius_m ?? 0;
+  const minL = policy.min_curve_length_m ?? 0;
+  if (minR <= 0 && minL <= 0) return [];
+  return curves
+    .filter((curve) => !curve.omitted && !curve.skip_allowed)
+    .filter((curve) => curve.r_m < minR - 1e-6 || curve.l_m < minL - 1e-6)
+    .map(
+      (curve) =>
+        `${curve.chainage_m.toFixed(1)}m: 종단곡선 R ${curve.r_m.toFixed(0)}m · L ${curve.l_m.toFixed(1)}m — ` +
+        `법정 최소 R ${minR.toFixed(0)}m · L ${minL.toFixed(0)}m 미달`,
+    );
+}
diff --git a/B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts b/B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts
index 9462f9b31..a026c3f2a 100644
--- a/B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts
+++ b/B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts
@@ -15,6 +15,7 @@
 
 import { pivotAxes } from "./B05_Profile_UI_Profile_Pivot";
 import { isStraightBend } from "./B05_Profile_Profile_Straight";
+import { skipsInitialCurve, verticalCurveShortfalls } from "./B05_Profile_Profile_CurveLaw";
 
 export interface AlignmentPolicy {
   station_interval_m: number;
@@ -35,6 +36,10 @@ export interface AlignmentPolicy {
   min_plan_radius_m?: number;
   /** 배향곡선 하한(m) — 이보다 급하면 경고만 낸다(2026-09-06 사용자 확정). */
   hairpin_min_radius_m?: number;
+  /** 종단곡선 법정 최소 R · L(m) · 초기값 곡선 없는 꼭짓점 열쇠(432 · `_Profile_CurveLaw`). */
+  min_vertical_radius_m?: number;
+  min_curve_length_m?: number;
+  no_curve_keys?: string[];
 }
 
 export interface AlignmentNode {
@@ -316,6 +321,7 @@ export function buildCurves(
     const hasRequested = Number.isFinite(requested) && requested > 0;
     // 전체 측점 폴리라인 — 사용자가 R을 지정한 변화점에만 라운드가 생긴다.
     if (onlyExplicit && !hasRequested) continue;
+    if (skipsInitialCurve(policy, key, pvi[index], hasRequested)) continue; // 초기값 직선(432)
     const fallbackLength = Number.isFinite(policy.default_curve_length_m)
       ? (policy.default_curve_length_m as number)
       : policy.default_curve_radius_m * Math.abs(delta);
@@ -423,6 +429,7 @@ export function buildAlignment(raw: AlignmentBase, input: AlignmentEdits): Profi
       grade_percent: length > 0 ? (height / length) * 100 : 0,
     });
   }
+  warnings.push(...verticalCurveShortfalls(curves, base.policy)); // 법정 R · L 미달(432)
   curves.forEach((curve) => {
     curve.bvc_elevation_m = evaluateAt(pviS, pviZ, curves, curve.bvc_m);
     curve.evc_elevation_m = evaluateAt(pviS, pviZ, curves, curve.evc_m);
diff --git a/config/config_system_design.py b/config/config_system_design.py
index cf5d31a89..092d8aed5 100644
--- a/config/config_system_design.py
+++ b/config/config_system_design.py
@@ -619,7 +619,11 @@ FOREST_ROAD_PROFILE_ALIGNMENT = {
     # 인접 직선이 짧아 `curve_tangent_max_ratio`에 걸리면 넣을 수 있는 **최대 L**까지만
     # 줄이고 경고를 남긴다(0으로 죽이지 않는다 — 2026-08-08 사용자 지시).
     # 사용자가 그 변화점 R을 직접 지정하면 그쪽이 이긴다. 호를 더/덜 길게 보이려면 여기만 고친다.
-    "default_curve_length_m": 15.0,
+    "default_curve_length_m": 20.0,
+    # 초기값(자동설계 체인 · 추천 [적용]으로 처음 만드는 종단)에서만 — 기본 L 기준 R 이 이 값(m)보다
+    # 크면(대수차 L/R 안쪽) 그 꼭짓점에 종단곡선을 두지 않음(직선) · 그 뒤 손 편집은 기본 곡선.
+    # TS 짝 = `B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts` `INITIAL_STRAIGHT_RADIUS_M`.
+    "initial_straight_radius_m": 500.0,
     # 인접 직선 길이 대비 곡선 반쪽이 점유할 수 있는 최대 비율.
     # 0.45면 짧은 쪽 직선의 55%가 항상 직선으로 남아 좌우 곡선이 겹치지 않는다.
     "curve_tangent_max_ratio": 0.45,
diff --git a/resources/tester/helper_234_1_structure_station.cjs b/resources/tester/helper_234_1_structure_station.cjs
index c599bdb60..a4698de53 100644
--- a/resources/tester/helper_234_1_structure_station.cjs
+++ b/resources/tester/helper_234_1_structure_station.cjs
@@ -160,12 +160,14 @@ Promise.resolve(
 
     // ④ 계획고 편집 따라감 — 한꺼번에 여럿 옮김(사라진 둘 · 새 둘)
     const straightJudge = loadTs("B05_Profile/logic/B05_Profile_Profile_Straight.ts");
+    const curveLaw = loadTs("B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts");
     const pivot = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Pivot.ts", {
       "./B05_Profile_Profile_Straight": straightJudge,
     });
     const alignment = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts", {
       "./B05_Profile_UI_Profile_Pivot": pivot,
       "./B05_Profile_Profile_Straight": straightJudge,
+      "./B05_Profile_Profile_CurveLaw": curveLaw,
     });
     const gone = [
       { id: "pipe-80.17", chainage_m: 80.17 },
diff --git a/resources/tester/helper_344_2_route_pairs.cjs b/resources/tester/helper_344_2_route_pairs.cjs
index 275b27073..ce4aa2f28 100644
--- a/resources/tester/helper_344_2_route_pairs.cjs
+++ b/resources/tester/helper_344_2_route_pairs.cjs
@@ -21,14 +21,17 @@ function loadTs(file, stubs = {}) {
 }
 
 const straightJudge = loadTs("B05_Profile/logic/B05_Profile_Profile_Straight.ts");
+const curveLaw = loadTs("B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts");
 const pivot = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Pivot.ts", {
   "./B05_Profile_Profile_Straight": straightJudge,
 });
 const alignment = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts", {
   "./B05_Profile_UI_Profile_Pivot": pivot,
   "./B05_Profile_Profile_Straight": straightJudge,
+  "./B05_Profile_Profile_CurveLaw": curveLaw,
 });
 const ground = loadTs("B05_Profile/logic/B05_Profile_Grade_Ground.ts", {
+  "./B05_Profile_Profile_CurveLaw": curveLaw,
   "./B05_Profile_UI_Profile_Alignment": alignment,
 });
 const carry = loadTs("B05_Profile/logic/B05_Profile_Grade_Carry.ts", {
diff --git a/resources/tester/helper_349_0v_span.cjs b/resources/tester/helper_349_0v_span.cjs
index 473788435..13ea93fe7 100644
--- a/resources/tester/helper_349_0v_span.cjs
+++ b/resources/tester/helper_349_0v_span.cjs
@@ -22,12 +22,14 @@ function loadTs(file, stubs = {}) {
 
 const curve = loadTs("B05_Profile/logic/B05_Profile_UI_RouteEdit_Curve.ts");
 const straightJudge = loadTs("B05_Profile/logic/B05_Profile_Profile_Straight.ts");
+const curveLaw = loadTs("B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts");
 const pivot = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Pivot.ts", {
   "./B05_Profile_Profile_Straight": straightJudge,
 });
 const alignment = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts", {
   "./B05_Profile_UI_Profile_Pivot": pivot,
   "./B05_Profile_Profile_Straight": straightJudge,
+  "./B05_Profile_Profile_CurveLaw": curveLaw,
 });
 const carry = loadTs("B05_Profile/logic/B05_Profile_Grade_Carry.ts", {
   "./B05_Profile_UI_Profile_Alignment": alignment,
diff --git a/resources/tester/helper_400_profile_carry.cjs b/resources/tester/helper_400_profile_carry.cjs
index 758fd809a..36d9aff5c 100644
--- a/resources/tester/helper_400_profile_carry.cjs
+++ b/resources/tester/helper_400_profile_carry.cjs
@@ -21,20 +21,24 @@ function loadTs(file, stubs = {}) {
 }
 
 const straightJudge = loadTs("B05_Profile/logic/B05_Profile_Profile_Straight.ts");
+const curveLaw = loadTs("B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts");
 const pivot = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Pivot.ts", {
   "./B05_Profile_Profile_Straight": straightJudge,
 });
 const alignment = loadTs("B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts", {
   "./B05_Profile_UI_Profile_Pivot": pivot,
   "./B05_Profile_Profile_Straight": straightJudge,
+  "./B05_Profile_Profile_CurveLaw": curveLaw,
 });
 const carry = loadTs("B05_Profile/logic/B05_Profile_Grade_Carry.ts", {
   "./B05_Profile_UI_Profile_Alignment": alignment,
 });
 const ground = loadTs("B05_Profile/logic/B05_Profile_Grade_Ground.ts", {
+  "./B05_Profile_Profile_CurveLaw": curveLaw,
   "./B05_Profile_UI_Profile_Alignment": alignment,
 });
 const grade = loadTs("B05_Profile/logic/B05_Profile_Pipeline_Grade.ts", {
+  "./B05_Profile_Profile_CurveLaw": curveLaw,
   "../../common_util/common_util_route_follow": {},
   "./B05_Profile_UI_Profile_Alignment": alignment,
   "./B05_Profile_Grade_Carry": carry,
diff --git a/resources/tester/helper_432_1_curve_law.cjs b/resources/tester/helper_432_1_curve_law.cjs
new file mode 100644
index 000000000..a8a451c75
--- /dev/null
+++ b/resources/tester/helper_432_1_curve_law.cjs
@@ -0,0 +1,67 @@
+/* 432-1 종단곡선 초기값 직선 · 법정 미달 거울 헬퍼 — `logic/B05_Profile_Grade_Ground.ts`
+ * `groundFollowingPlan` · `_UI_Profile_Alignment.ts` `buildAlignment` · `_Profile_CurveLaw.ts` 를
+ * 그 자리에서 트랜스파일해 돌림. 입력 argv[2] JSON 파일 · 표준출력 JSON 한 벌.
+ */
+const fs = require("fs");
+const path = require("path");
+const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+
+const ROOT = path.join(__dirname, "..", "..");
+const cache = new Map();
+function loadTs(file) {
+  const full = path.resolve(file);
+  if (cache.has(full)) return cache.get(full);
+  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
+    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
+  }).outputText;
+  const box = { exports: {} };
+  cache.set(full, box.exports);
+  const localRequire = (request) => {
+    if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
+    return require(request);
+  };
+  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
+  return box.exports;
+}
+
+const LOGIC = path.join(ROOT, "B05_Profile", "logic");
+const align = loadTs(path.join(LOGIC, "B05_Profile_UI_Profile_Alignment.ts"));
+const ground = loadTs(path.join(LOGIC, "B05_Profile_Grade_Ground.ts"));
+const law = loadTs(path.join(LOGIC, "B05_Profile_Profile_CurveLaw.ts"));
+const carry = loadTs(path.join(LOGIC, "B05_Profile_Grade_Carry.ts"));
+
+const input = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
+const plan = ground.groundFollowingPlan(input.ground);
+const base = {
+  policy: input.policy,
+  onlyExplicitCurves: false,
+  basePvi: input.basePvi,
+  chainage: input.chainage,
+  ground: input.groundZ,
+  stations: input.stations.map((s) => ({ station_id: null, chainage_m: s })),
+};
+const cases = input.edits.map((edits) => {
+  const al = align.buildAlignment(base, edits);
+  return {
+    curves: al.curves.map((c) => [c.chainage_m, c.r_m, c.l_m]),
+    shortfalls: law.verticalCurveShortfalls(al.curves, input.policy),
+    warnings: al.warnings,
+  };
+});
+console.log(
+  JSON.stringify({
+    pvi: plan ? plan.pvi : null,
+    keys: plan ? plan.noCurveKeys : null,
+    cases,
+    consts: [law.DEFAULT_CURVE_LENGTH_M, law.INITIAL_STRAIGHT_RADIUS_M],
+    carried: input.carry
+      ? carry.carryNoCurveKeys(
+          input.carry.old_xy,
+          input.carry.new_xy,
+          input.carry.old_keys,
+          input.carry.ground_keys,
+          input.carry.ground_pvi,
+        )
+      : null,
+  }),
+);
diff --git a/resources/tester/test_432_1_curve_law.py b/resources/tester/test_432_1_curve_law.py
new file mode 100644
index 000000000..28efdd490
--- /dev/null
+++ b/resources/tester/test_432_1_curve_law.py
@@ -0,0 +1,289 @@
+# -*- coding: utf-8 -*-
+"""432-1 종단곡선 기본 L 20 m · 법정 미달 경고 · 초기값 R > 500 m 꼭짓점 = 곡선 없음(요구 262).
+
+파이썬 `B05_Profile_Engine_Grade_CurveLaw.py` · `design_ground_following_profile` ·
+`build_alignment`
+(정책 `no_curve_keys`) ↔ TS `logic/B05_Profile_Profile_CurveLaw.ts` · `_Grade_Ground.ts`
+`groundFollowingPlan` · `_UI_Profile_Alignment.ts` 거울(`helper_432_1_curve_law.cjs`).
+./venv/Scripts/python.exe -m pytest resources/tester/test_432_1_curve_law.py -q
+"""
+
+import json
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+import numpy as np
+import pytest
+
+HERE = Path(__file__).resolve().parent
+ROOT = HERE.parent.parent
+sys.path.insert(0, str(ROOT))
+
+from B05_Profile.B05_Profile_Engine_Grade import resolve_grade_options  # noqa: E402
+from B05_Profile.B05_Profile_Engine_Grade_Alignment import (  # noqa: E402
+    AlignmentPolicy,
+    build_alignment,
+)
+from B05_Profile.B05_Profile_Engine_Grade_Carry import (  # noqa: E402
+    carry_base,
+    carry_no_curve_keys,
+    carry_policy,
+)
+from B05_Profile.B05_Profile_Engine_Grade_CurveLaw import initial_no_curve_keys  # noqa: E402
+from B05_Profile.B05_Profile_Engine_Grade_Profile import (  # noqa: E402
+    design_ground_following_profile,
+)
+from config.config_system import FOREST_ROAD_PROFILE_ALIGNMENT  # noqa: E402
+
+# 20 m 마디 기울기(%) — 꼭짓점 대수차 1 · 6 · 0.5 · 7.5 · 0.5 · 7.5 · 5.5 · 0.5 · 3 %
+GRADES = [2.0, 3.0, 9.0, 9.5, 2.0, 2.5, 10.0, 4.5, 4.0, 1.0]
+STATIONS = [20.0 * i for i in range(len(GRADES) + 1)]
+NO_CURVE = ["20.000", "60.000", "100.000", "160.000", "180.000"]
+CURVED = [40.0, 80.0, 120.0, 140.0]
+
+
+def _vertex_z() -> list[float]:
+    z = [100.0]
+    for grade in GRADES:
+        z.append(z[-1] + grade / 100.0 * 20.0)
+    return z
+
+
+def _longitudinal() -> dict:
+    zs = _vertex_z()
+    samples = [
+        {"chainage_m": float(s), "elevation_m": float(np.interp(s, STATIONS, zs))}
+        for s in range(0, int(STATIONS[-1]) + 1)
+    ]
+    return {"samples": samples, "stations": [{"chainage_m": s} for s in STATIONS]}
+
+
+@pytest.fixture(scope="module")
+def initial():
+    longitudinal = _longitudinal()
+    options = resolve_grade_options("trunk", terrain_type="normal")
+    alignment, profile = design_ground_following_profile(longitudinal, options)
+    return longitudinal, options, alignment, profile
+
+
+def _rebuild(alignment: dict, edits: dict, policy: dict | None = None) -> dict:
+    longitudinal = _longitudinal()
+    return build_alignment(
+        base_s=np.array([n["chainage_m"] for n in alignment["base_pvi"]]),
+        base_z=np.array([n["elevation_m"] for n in alignment["base_pvi"]]),
+        chainage=np.array([row["chainage_m"] for row in longitudinal["samples"]]),
+        ground=np.array([row["elevation_m"] for row in longitudinal["samples"]]),
+        stations=longitudinal["stations"],
+        policy=AlignmentPolicy.from_dict(policy or alignment["policy"]),
+        edits=edits,
+    )
+
+
+EDITS = [
+    {},
+    {"station_offsets": {"60.000": 0.1}},  # 그 꼭짓점 손 편집 → 기본 곡선
+    {"station_offsets": {"80.000": 0.2}},  # 이웃 손 편집 → 60 · 100 은 얼린 채
+    {"curve_radii": {"100.000": 800.0}},  # R 넣음 → 곡선
+]
+
+
+# 노선 [저장] — 끝 노드만 옮김(100 m 까지 같은 자리) · 옛 열쇠(추천) · 새 지반 열쇠
+NEW_TOTAL = 100.0 + float(np.hypot(100.0, 30.0))
+NEW_STATIONS = [20.0 * i for i in range(11)] + [round(NEW_TOTAL, 3)]
+CARRY = {
+    "old_xy": [(0.0, 0.0), (100.0, 0.0), (200.0, 0.0)],
+    "new_xy": [(0.0, 0.0), (100.0, 0.0), (200.0, 30.0)],
+    "old_keys": NO_CURVE,
+    "ground_keys": ["140.000", "180.000"],
+    "ground_pvi": [{"chainage_m": s, "elevation_m": 0.0} for s in NEW_STATIONS],
+}
+# 같은 자리 옛 꼭짓점 열쇠(20 · 60 · 100) + 바뀐 자리 새 지반 열쇠(140 · 180) · 옛 160 은 버림
+CARRIED = ["20.000", "60.000", "100.000", "140.000", "180.000"]
+
+
+def _curve_at(alignment: dict) -> list[float]:
+    return [round(c["chainage_m"], 3) for c in alignment["curves"]]
+
+
+def test_기본_L_20_문턱_500_config_TS_짝():
+    assert FOREST_ROAD_PROFILE_ALIGNMENT["default_curve_length_m"] == 20.0
+    assert FOREST_ROAD_PROFILE_ALIGNMENT["initial_straight_radius_m"] == 500.0
+    law = (ROOT / "B05_Profile/logic/B05_Profile_Profile_CurveLaw.ts").read_text(encoding="utf-8")
+    assert "DEFAULT_CURVE_LENGTH_M = 20;" in law and "INITIAL_STRAIGHT_RADIUS_M = 500;" in law
+
+
+def test_초기값_대수차_4퍼센트_안쪽은_곡선_없음(initial):
+    _long, _options, alignment, _profile = initial
+    assert alignment["policy"]["default_curve_length_m"] == 20.0
+    assert alignment["policy"]["no_curve_keys"] == NO_CURVE
+    assert _curve_at(alignment) == CURVED
+    # 꼭짓점 높이 그대로 — 곡선 없는 측점 계획고 = 지반고(원지반 지남)
+    rows = {round(r["chainage_m"], 3): r for r in alignment["stations"]}
+    for key in NO_CURVE:
+        row = rows[float(key)]
+        assert row["plan_elevation_m"] == pytest.approx(row["ground_elevation_m"], abs=1e-4)
+
+
+def test_법정_미달_경고_45퍼센트로_줄어든_곳도(initial):
+    _long, options, alignment, _profile = initial
+    assert options.min_vertical_radius_m == 100.0 and options.min_curve_length_m == 20.0
+    assert alignment["policy"]["min_curve_length_m"] == 20.0
+    # 20 m 마디 = 반쪽 9 m 한도 → L 18 m(줄어든 경고 글 그대로) + 법정 L 20 미달 경고
+    lengths = [round(c["l_m"], 3) for c in alignment["curves"]]
+    assert lengths == [18.0] * len(CURVED)
+    reduced = [w for w in alignment["warnings"] if "줄였습니다" in w]
+    short = [w for w in alignment["warnings"] if "미달" in w]
+    assert len(reduced) == len(CURVED) and len(short) == len(CURVED)
+    assert short[0].startswith("40.0m: 종단곡선 R") and "법정 최소 R 100m · L 20m 미달" in short[0]
+
+
+def test_손_편집은_기본_곡선_이웃은_얼린_채(initial):
+    alignment = initial[2]
+    own = _rebuild(alignment, EDITS[1])
+    assert 60.0 in _curve_at(own)
+    neighbor = _rebuild(alignment, EDITS[2])
+    assert 60.0 not in _curve_at(neighbor) and 100.0 not in _curve_at(neighbor)
+    assert 80.0 in _curve_at(neighbor)
+    radius = _rebuild(alignment, EDITS[3])
+    assert 100.0 in _curve_at(radius)
+
+
+def test_옛_저장분은_그대로(initial):
+    alignment = initial[2]
+    old = {**alignment["policy"], "default_curve_length_m": 15.0}
+    old.pop("no_curve_keys")
+    got = _rebuild(alignment, {}, old)
+    assert len(got["curves"]) == len(STATIONS) - 2  # 꼭짓점마다 곡선(옛 규칙)
+
+
+def test_TS_거울_첫_계획선_열쇠_곡선_경고(initial, tmp_path):
+    longitudinal, options, alignment, _profile = initial
+    payload = {
+        "ground": {
+            "samples": longitudinal["samples"],
+            "stations": STATIONS,
+            "policy": {**alignment["policy"], "no_curve_keys": []},
+            "startOffsetM": options.start_elevation_offset_m,
+            "endOffsetM": options.end_elevation_offset_m,
+        },
+        "policy": alignment["policy"],
+        "basePvi": alignment["base_pvi"],
+        "chainage": [row["chainage_m"] for row in longitudinal["samples"]],
+        "groundZ": [row["elevation_m"] for row in longitudinal["samples"]],
+        "stations": STATIONS,
+        "edits": [{"station_offsets": {}, "curve_radii": {}, **e} for e in EDITS],
+        "carry": {
+            **CARRY,
+            "old_xy": [{"x": x, "y": y} for x, y in CARRY["old_xy"]],
+            "new_xy": [{"x": x, "y": y} for x, y in CARRY["new_xy"]],
+        },
+    }
+    source = tmp_path / "in.json"
+    source.write_text(json.dumps(payload), encoding="utf-8")
+    proc = subprocess.run(
+        ["node", os.path.join(HERE, "helper_432_1_curve_law.cjs"), str(source)],
+        capture_output=True,
+        text=True,
+        encoding="utf-8",
+        timeout=60,
+    )
+    assert proc.returncode == 0, proc.stderr
+    ts = json.loads(proc.stdout)
+    assert ts["consts"] == [20, 500]
+    assert ts["keys"] == NO_CURVE
+    assert [n["chainage_m"] for n in ts["pvi"]] == [n["chainage_m"] for n in alignment["base_pvi"]]
+    assert [n["elevation_m"] for n in ts["pvi"]] == pytest.approx(
+        [n["elevation_m"] for n in alignment["base_pvi"]], abs=1e-6
+    )
+    assert ts["carried"] == CARRIED
+    for edits, got in zip(EDITS, ts["cases"], strict=True):
+        py = _rebuild(alignment, edits)
+        assert [c[0] for c in got["curves"]] == pytest.approx(
+            [c["chainage_m"] for c in py["curves"]], abs=1e-6
+        )
+        assert [c[1] for c in got["curves"]] == pytest.approx(
+            [c["r_m"] for c in py["curves"]], rel=1e-6
+        )
+        # 미달 경고 글은 두 쪽 같은 글(옛 경고 글은 앞머리가 원래 다름)
+        py_short = [w for w in py["warnings"] if "미달" in w]
+        assert got["shortfalls"] == py_short
+        assert [w for w in got["warnings"] if "미달" in w] == py_short
+
+
+def test_추천_적용_균형_종단에서_열쇠(initial, tmp_path):
+    from B05_Profile.B05_Profile_Router_RouteInitial import _set_base_pvi
+
+    longitudinal, _options, alignment, _profile = initial
+    path = tmp_path / "long.json"
+    path.write_text(json.dumps({**longitudinal, "profile_alignment": alignment}), encoding="utf-8")
+    # 균형 종단 — 100 m 를 2 m 낮춤(그 둘레 대수차가 커짐 · 나머지는 지반 그대로)
+    plan = [z - (2.0 if s == 100.0 else 0.0) for s, z in zip(STATIONS, _vertex_z())]
+    _set_base_pvi(path, STATIONS, plan)
+    stored = json.loads(path.read_text(encoding="utf-8"))["profile_alignment"]["policy"]
+    expected = initial_no_curve_keys(np.array(STATIONS), np.array(plan), 20.0)
+    assert stored["no_curve_keys"] == list(expected)
+    assert "100.000" not in stored["no_curve_keys"] and "20.000" in stored["no_curve_keys"]
+
+
+def test_부르는_곳():
+    def read(rel: str) -> str:
+        return (ROOT / rel).read_text(encoding="utf-8")
+
+    assert "skipsInitialCurve(policy, key, pvi[index], hasRequested)" in read(
+        "B05_Profile/logic/B05_Profile_UI_Profile_Alignment.ts"
+    )
+    assert "verticalCurveShortfalls(alignment.curves, policy)" in read(
+        "B05_Profile/B05_Profile_UI_Profile_Balance.ts"
+    )
+    assert "carryNoCurveKeys(" in read("B05_Profile/logic/B05_Profile_Pipeline_Grade.ts")
+    assert "carry_policy(old_xy, new_xy, old_alignment, alignment)" in read(
+        "B05_Profile/B05_Profile_Route_Save.py"
+    )
+
+
+def test_노선_저장_열쇠_옮김():
+    args = [CARRY[k] for k in ("old_xy", "new_xy", "old_keys", "ground_keys", "ground_pvi")]
+    assert carry_no_curve_keys(*args) == CARRIED
+
+
+def test_추천_적용_종단_노선_고쳐_저장_안_바뀐_구간_그대로(initial, tmp_path):
+    from B05_Profile.B05_Profile_Router_RouteInitial import _set_base_pvi
+
+    longitudinal, options, alignment, _profile = initial
+    path = tmp_path / "long.json"
+    path.write_text(json.dumps({**longitudinal, "profile_alignment": alignment}), encoding="utf-8")
+    plan = [z - (2.0 if s == 100.0 else 0.0) for s, z in zip(STATIONS, _vertex_z())]
+    _set_base_pvi(path, STATIONS, plan)
+    old = json.loads(path.read_text(encoding="utf-8"))["profile_alignment"]
+    old_rebuilt = _rebuild(old, {})
+    # 새 노선 종단 = 서버가 새로 냄(정책 config · L 20 · 새 지반 열쇠) → 옛 정책 · 옛 꼭짓점 이어받음
+    zs = _vertex_z()
+    samples = [
+        {"chainage_m": float(s), "elevation_m": float(np.interp(s, STATIONS, zs))}
+        for s in range(0, int(NEW_TOTAL) + 1)
+    ] + [{"chainage_m": NEW_TOTAL, "elevation_m": float(zs[-1])}]
+    new_long = {"samples": samples, "stations": [{"chainage_m": s} for s in NEW_STATIONS]}
+    fresh, _ = design_ground_following_profile(new_long, options)
+    old_policy = {**old["policy"], "default_curve_length_m": 15.0}  # 옛 L 이 이어지는지
+    policy = carry_policy(CARRY["old_xy"], CARRY["new_xy"], {**old, "policy": old_policy}, fresh)
+    assert policy["default_curve_length_m"] == 15.0
+    base = carry_base(CARRY["old_xy"], CARRY["new_xy"], old["base_pvi"], fresh["base_pvi"])
+    carried = build_alignment(
+        base_s=np.array([n["chainage_m"] for n in base]),
+        base_z=np.array([n["elevation_m"] for n in base]),
+        chainage=np.array([row["chainage_m"] for row in samples]),
+        ground=np.array([row["elevation_m"] for row in samples]),
+        stations=new_long["stations"],
+        policy=AlignmentPolicy.from_dict({**policy, "default_curve_length_m": 20.0}),
+        edits={},
+    )
+    before = [(c["chainage_m"], round(c["r_m"], 3)) for c in old_rebuilt["curves"]]
+    after = [(c["chainage_m"], round(c["r_m"], 3)) for c in carried["curves"]]
+    # 안 바뀐 구간(< 80 m · 끝 노드 영향 밖) R · 직선 그대로
+    assert [c for c in after if c[0] < 80] == [c for c in before if c[0] < 80]
+    old_keys = set(old["policy"]["no_curve_keys"])
+    assert {k for k in policy["no_curve_keys"] if float(k) <= 100} == {
+        k for k in old_keys if float(k) <= 100
+    }