diff --git a/src/phase_z2_composition.py b/src/phase_z2_composition.py
index 8050cb4..403b8d1 100644
--- a/src/phase_z2_composition.py
+++ b/src/phase_z2_composition.py
@@ -701,6 +701,12 @@ def select_composition_units(candidates, allowed_statuses: set[str]) -> list[Com
         selected.append(c)
         covered.update(c.source_section_ids)
 
+    # 2026-05-14 — MDX 자연 순서 (section_id 오름차순) 로 재정렬.
+    # 사용자 룰 (CLAUDE.md "정보 계층: 위 → 아래") + 04-1/04-2 score 차이로 인한
+    # zone 거꾸로 배치 catch. score 는 viable selection 에만, position 은 MDX 순서.
+    # source_section_ids 첫 element 기준 lexicographic sort — "04-1" < "04-2" < "04-2.1" < "04-2.2".
+    selected.sort(key=lambda c: c.source_section_ids[0] if c.source_section_ids else "")
+
     return selected
 
 
diff --git a/src/phase_z2_pipeline.py b/src/phase_z2_pipeline.py
index e882b04..04170d5 100644
--- a/src/phase_z2_pipeline.py
+++ b/src/phase_z2_pipeline.py
@@ -41,6 +41,7 @@ from jinja2 import Environment, FileSystemLoader, select_autoescape
 from phase_z2_composition import (
     LAYOUT_PRESETS,
     CompositionUnit,
+    derive_parent_id,
     plan_composition,
     select_display_strategy_candidates,
     select_layout_candidates,
@@ -85,6 +86,19 @@ V4_LABEL_TO_PHASE_Z_STATUS = {
 }
 MVP1_ALLOWED_STATUSES = {"matched_zone", "adapt_matched_zone"}
 
+# Env toggle PHASE_Z_ALLOW_RESTRUCTURE (default OFF) — when "1/true/yes" 도 restructure
+# (= extract_matched_zone) 통과시킴. AI fallback 대행 (사용자가 콘텐츠를 frame 구조에 맞게
+# 재정리한 mdx 를 제공) 시나리오용. MVP1 정책 자체는 무변 — env 켜진 세션만 영향.
+if os.environ.get("PHASE_Z_ALLOW_RESTRUCTURE", "").strip().lower() in {"1", "true", "yes"}:
+    MVP1_ALLOWED_STATUSES = MVP1_ALLOWED_STATUSES | {"extract_matched_zone"}
+
+# Env toggle PHASE_Z_ALLOW_REJECT (default OFF) — when "1/true/yes" 도 reject
+# (= fallback_candidate) 통과시킴. 사용자 룰 : "매칭점수 가장 높은 frame 의 구조,
+# 요소, 색상 활용" — V4 가 의미적으로 reject 해도 structure 매칭 충분하면 강제 사용.
+# 04-1 같은 all-reject section + 신규 등록 frame 강제 매핑 시나리오용.
+if os.environ.get("PHASE_Z_ALLOW_REJECT", "").strip().lower() in {"1", "true", "yes"}:
+    MVP1_ALLOWED_STATUSES = MVP1_ALLOWED_STATUSES | {"fallback_candidate"}
+
 # Step 9 v0 (사용자 lock 2026-05-08) — V4 label → application_mode 변환.
 # tuple = (application_mode, auto_applicable, delegated_to).
 # status.md §2 Q3 / Q7 lock 따라.
@@ -184,7 +198,15 @@ def parse_mdx(mdx_path: Path) -> tuple[str, list[MdxSection], Optional[str]]:
     if footer_match:
         body = footer_match.group(1)
         bullet_match = re.search(r"\*\s*\*\*([^*]+)\*\*", body)
-        footer_text = (bullet_match.group(1).strip() if bullet_match else body.strip())
+        if bullet_match:
+            footer_text = bullet_match.group(1).strip()
+        else:
+            # 2026-05-14 Q5 — markdown bullet marker `*` 시작 시 제거 (사용자 lock).
+            # `* 검증 없는 정책...` → `검증 없는 정책...`
+            plain = body.strip()
+            if plain.startswith("*"):
+                plain = plain[1:].lstrip()
+            footer_text = plain
         text = text[:footer_match.start()] + text[footer_match.end():]
 
     sections = []
@@ -372,47 +394,80 @@ def load_v4_result() -> dict:
     return yaml.safe_load(V4_RESULT_PATH.read_text(encoding="utf-8"))
 
 
-def align_sections_to_v4_granularity(sections: list[MdxSection], v4: dict) -> list[MdxSection]:
-    """V4 section granularity 에 맞춰 sections 조정.
+def align_sections_to_v4_granularity(
+    sections: list[MdxSection],
+    v4: dict,
+    *,
+    override_target_section_ids: Optional[list[str]] = None,
+) -> list[MdxSection]:
+    """Align MDX sections to canonical sub-section granularity.
 
-    IMP-08 B-3 : canonical sub-section id ``${section_id}-sub-${ordinal}``
-    (예 : ``04-2-sub-1``) 를 emit 하고, legacy V4 키 (``04-2.1``) 는
-    ``v4_alias_keys`` 로 보존하여 ``_resolve_v4_section_key`` 가 alias 경로로
-    매칭한다. canonical ordinal id 는 frontend drag/drop override 와 동일
-    schema (`section_id-sub-N`).
+    Default behaviour (V4-driven granularity, backward compatible) :
+      - V4 has section_id exact key   -> keep section unchanged (parent
+        granularity rendering, parent-level V4 evidence applies).
+      - V4 missing + H3 sub-sections  -> drill into sub-sections, emit
+        canonical ids ``${section_id}-sub-${ordinal}`` with optional
+        decimal alias for legacy V4 keys (e.g. ``04-2.1``).
+      - V4 missing + no H3            -> pass through (downstream V4 lookup
+        will naturally abort with no_v4_section).
 
-    N-R5 alias guard : heading_number 가 decimal (``2.1``) 일 때만 alias
-    emit. integer-only (``1``) / non-numeric heading 은 alias 0 — sibling
-    parent V4 evidence 로 잘못 promote 되는 collision 방지 (RULE 0).
+    IMP-08 B-3 / Stage 5 R2 blocker-fix — ``override_target_section_ids``
+    is the list of section ids that drag/drop override CLI flags target.
+    When any override target matches ``${section_id}-sub-N`` for a section
+    whose parent is otherwise V4-aligned, that section is force-drilled so
+    sub-section ids become addressable. This keeps the default rendering
+    path on V4 granularity while making drag/drop deterministic regardless
+    of whether V4 carries a parent exact key.
 
-    각 section 에 대해 :
-      - V4 에 section.section_id 키 있음 → 그대로 유지 (## level 매칭)
-      - V4 에 키 없고 raw_content 에 ### sub-section 존재 → ### 로 drill
-      - V4 에 키 없고 ### 도 없음 → 원본 그대로 (V4 lookup 단계에서 자연스럽게 abort)
+    Each drilled sub-section carries :
+      - heading_number : decimal "2.1" / integer "1" / None (bare H3 title).
+      - v4_alias_keys  : legacy V4 keys to try when the canonical ordinal
+        id misses. Populated only when ``heading_number`` matches the
+        decimal pattern ``\\d+\\.\\d+`` (N-R5 guard) — integer-only or
+        bare H3 produces no alias to avoid sibling-parent V4 collisions.
 
-    설계 원칙 :
-      - parser (parse_mdx) = MDX 만 앎 (V4 무관)
-      - aligner (이 함수) = V4 키 기준 granularity 결정
-      - runtime parser 가 matching artifact 의 granularity 를 *따라가는* 구조
+    Design boundary :
+      - parser (``parse_mdx``)  = MDX-only knowledge (V4-agnostic).
+      - aligner (this function) = canonical sub-id schema, MDX-driven on
+        force_drill, V4-driven otherwise.
+      - resolver (``_resolve_v4_section_key``) = exact > alias > None,
+        never auto-promotes to parent/sibling (axis 7 hybrid lock).
     """
     v4_keys = set(v4.get("mdx_sections", {}).keys())
+
+    # Build the set of parent ids whose sub-ids are explicitly targeted by
+    # an override. These sections must be drilled even if V4 also carries
+    # the parent key exactly. Parents derived from canonical "X-sub-N" ids
+    # only — non-sub ids (top-level overrides) do not trigger drilling.
+    force_drill_parents: set[str] = set()
+    if override_target_section_ids:
+        for sid in override_target_section_ids:
+            parent = derive_parent_id(sid)
+            if parent and sid != parent:
+                force_drill_parents.add(parent)
+
     aligned: list[MdxSection] = []
 
-    # IMP-08 B-3 : capture optional heading-number prefix (decimal "2.1" or
-    # integer "1") + heading title. None group = bare "### Title".
+    # Capture optional heading-number prefix (decimal "2.1" or integer "1")
+    # plus the heading title. None group = bare "### Title".
     sub_pattern = re.compile(
         r"^###\s+(?:(\d+(?:\.\d+)?)\s+)?(.+?)$", re.MULTILINE
     )
     decimal_re = re.compile(r"\d+\.\d+")
 
     for section in sections:
-        if section.section_id in v4_keys:
+        force_drill = section.section_id in force_drill_parents
+        if section.section_id in v4_keys and not force_drill:
+            # V4 carries this section exactly and no override targets a
+            # sub-id under it: keep parent granularity (backward compat).
             aligned.append(section)
             continue
 
         sub_matches = list(sub_pattern.finditer(section.raw_content))
         if not sub_matches:
-            aligned.append(section)  # drill 불가, V4 lookup 에서 abort 됨
+            # No H3 sub-sections: cannot drill. Pass section through;
+            # downstream V4 lookup aborts with no_v4_section when needed.
+            aligned.append(section)
             continue
 
         mdx_id = section.section_id.split("-")[0]   # e.g., "04"
@@ -530,7 +585,7 @@ def lookup_v4_match_with_fallback(
     section_id: str,
     *,
     raw_content: Optional[str] = None,
-    max_rank: int = 3,
+    max_rank: Optional[int] = None,
     alias_keys: Optional[list] = None,
 ) -> tuple[Optional[V4Match], dict]:
     """Select V4 rank-1, or promote rank-2/3 when rank-1 is not auto-renderable.
@@ -538,6 +593,13 @@ def lookup_v4_match_with_fallback(
     This is an IMP-05 selector only. It uses existing V4 labels, frame-contract
     presence, and the Phase Z capacity precheck; it does not call calculate_fit.
     """
+    # 2026-05-14 — max_rank env toggle PHASE_Z_MAX_RANK (default 3).
+    # 보고용 : 등록 frame rank 가 4+ 인 경우 (예: mdx05-2 의 rank 10) 도 통과시킴.
+    if max_rank is None:
+        try:
+            max_rank = int(os.environ.get("PHASE_Z_MAX_RANK", "3"))
+        except ValueError:
+            max_rank = 3
     resolved = _resolve_v4_section_key(v4, section_id, alias_keys=alias_keys)
     sec = v4.get("mdx_sections", {}).get(resolved) if resolved else None
     trace = {
@@ -556,7 +618,20 @@ def lookup_v4_match_with_fallback(
         trace["fallback_reason"] = "no_v4_section"
         return None, trace
 
-    judgments = (sec.get("judgments_full32") or [])[:max_rank]
+    # 2026-05-14 — fallback chain sort = label priority + confidence (frontend 와 동일).
+    # 사용자 룰 : "reject 외 다른 label 있으면 reject 는 ranking 상단 X".
+    # judgments_full32 는 confidence desc only. 그대로 iterate 시 reject (conf 높은) 가
+    # light_edit (conf 낮은) 보다 먼저 선택될 수 있음. label priority 우선 정렬.
+    _LABEL_PRIORITY = {"use_as_is": 0, "light_edit": 1, "restructure": 2, "reject": 3}
+    all_judgments = sec.get("judgments_full32") or []
+    judgments_sorted = sorted(
+        all_judgments,
+        key=lambda j: (
+            _LABEL_PRIORITY.get(j.get("label"), 99),
+            -float(j.get("confidence") or 0),
+        ),
+    )
+    judgments = judgments_sorted[:max_rank]
     if not judgments:
         trace["fallback_reason"] = "empty_v4_judgments"
         return None, trace
@@ -822,14 +897,19 @@ def build_layout_css(layout_preset: str, zones_data: list[dict],
     # ── Step D-ext : user override 처리 ──
     if override_zone_geometries:
         if layout_preset == "horizontal-2":
-            # heights_px override — zone 의 h 비율로 SLIDE_BODY_HEIGHT 분배.
+            # heights_px override — zone 의 h 비율로 (SLIDE_BODY_HEIGHT - gap) 분배.
+            # 2026-05-14 BUGFIX (Axis A) — 원래 SLIDE_BODY_HEIGHT 만 사용해서 zone
+            #   heights 합 + gap 이 slide-body 보다 +gap px overflow. gap 빼고
+            #   분배 (compute_zone_layout 의 normal path 와 동일 logic).
             ratios = []
             for pos in positions:
                 geom = override_zone_geometries.get(pos)
                 ratios.append(float(geom["h"]) if geom else 0.0)
             total = sum(ratios)
             if total > 0:
-                heights_px = [int(round(r / total * SLIDE_BODY_HEIGHT)) for r in ratios]
+                n = len(ratios)
+                available = SLIDE_BODY_HEIGHT - gap * (n - 1)
+                heights_px = [int(round(r / total * available)) for r in ratios]
                 rows = " ".join(f"{h}px" for h in heights_px)
                 return {
                     "areas": preset["css_areas"],
@@ -1390,7 +1470,13 @@ def render_slide(slide_title: str, slide_footer: Optional[str],
             zone["partial_html"] = ""
             continue
         partial = env.get_template(f"families/{zone['template_id']}.html")
-        zone["partial_html"] = partial.render(slot_payload=zone["slot_payload"])
+        # 2026-05-14 — partial 에 assets_dir 전달. figma asset PNG/SVG 참조 가능.
+        # assets_dir = "assets/<template_id>" (run-relative). final.html 의 <img src>
+        # 상대 path 와 matching — frontend `/data/runs/.../assets/...` serve.
+        zone["partial_html"] = partial.render(
+            slot_payload=zone["slot_payload"],
+            assets_dir=zone.get("assets_dir") or "",
+        )
 
     base = env.get_template("slide_base.html")
     return base.render(
@@ -2076,8 +2162,21 @@ def run_phase_z2_mvp1(
     # 2. Load V4
     v4 = load_v4_result()
 
-    # 3. Align sections to V4 granularity (### drill if needed)
-    sections = align_sections_to_v4_granularity(sections, v4)
+    # 3. Align sections to V4 granularity (### drill if needed).
+    # IMP-08 B-3 / Stage 5 R2 : forward override target ids so sub-id
+    # drag/drop targets force-drill their parent section even when V4
+    # carries the parent exact key (deterministic drag/drop addressing).
+    _override_target_sids: list[str] = []
+    if override_section_assignments:
+        for _sids in override_section_assignments.values():
+            for _sid in _sids:
+                if isinstance(_sid, str) and _sid:
+                    _override_target_sids.append(_sid)
+    sections = align_sections_to_v4_granularity(
+        sections,
+        v4,
+        override_target_section_ids=_override_target_sids or None,
+    )
     print(f"  aligned : sections={len(sections)} ({[s.section_id for s in sections]})")
 
     # ─── Step 5: V4 매칭 evidence (non-reject max-6 후보 list — 사용자 lock 2026-05-08) ───
@@ -2131,11 +2230,12 @@ def run_phase_z2_mvp1(
     v4_fallback_traces: dict[str, dict] = {}
 
     def lookup_fn(sid: str) -> Optional[V4Match]:
+        # max_rank None → lookup_v4_match_with_fallback 가 PHASE_Z_MAX_RANK env (default 3) 사용.
         match, trace = lookup_v4_match_with_fallback(
             v4,
             sid,
             raw_content=section_content_by_id.get(sid),
-            max_rank=3,
+            max_rank=None,
             alias_keys=section_alias_by_id.get(sid),
         )
         v4_fallback_traces[sid] = trace
@@ -2643,6 +2743,10 @@ def run_phase_z2_mvp1(
             "slot_payload": slot_payload,
             "content_weight": content_weight,
             "min_height_px": min_height_px,
+            # 2026-05-14 — partial.render() 가 assets_dir 을 zone.get() 으로 읽으므로
+            # zones_data 에도 포함해야 figma asset PNG 경로가 final.html 에 박힘.
+            # as_posix() — Windows 에서 str(Path) 는 backslash 라 url() 에서 404.
+            "assets_dir": assets_dir.relative_to(run_dir).as_posix() if assets_dir else None,
             "assignment_source": plan_assignment_source,
             "section_assignment_override": plan_section_override,
         })
@@ -2671,7 +2775,7 @@ def run_phase_z2_mvp1(
             "min_height_px": min_height_px,
             "slot_payload_keys": sorted(slot_payload.keys()),
             "content_truncated_count": truncated_count,        # None / N (builder 가 N 개 자름)
-            "assets_dir": str(assets_dir.relative_to(run_dir)) if assets_dir else None,
+            "assets_dir": assets_dir.relative_to(run_dir).as_posix() if assets_dir else None,
             "content_weight": content_weight,
             # trace-only runtime 연결 v0 — B1 → B2 → B4 chain 결과 (render 미영향).
             "placement_trace": placement_trace,
@@ -2871,7 +2975,7 @@ def run_phase_z2_mvp1(
     # reporting only. Runtime selection goes through _resolve_v4_section_key
     # (4 sites). Direct dict lookup here is intentional — debug_zones carries
     # dict-shape entries without v4_alias_keys plumbing, and a miss here only
-    # yields a "V4 entry 없음" report line (runtime impact zero).
+    # yields a "V4 entry missing" report line (runtime impact zero).
     try:
         with open(V4_RESULT_PATH, encoding="utf-8") as _vf:
             _v4_full = yaml.safe_load(_vf)
diff --git a/tests/test_phase_z2_subsection_schema.py b/tests/test_phase_z2_subsection_schema.py
index 0955b68..ae96a3e 100644
--- a/tests/test_phase_z2_subsection_schema.py
+++ b/tests/test_phase_z2_subsection_schema.py
@@ -111,7 +111,9 @@ def test_mdx_section_default_construction_preserves_4_positional_callers():
 
 
 def test_align_passthrough_when_v4_key_exact_match():
-    # Section already aligned to V4 key — aligner keeps it untouched.
+    # Section already aligned to V4 key (no H3 sub-sections, no override
+    # target): aligner keeps it untouched. Parent-level V4 evidence
+    # flows via exact-match lookup.
     sections = [_section("04-1", 1, "1. Top", "body")]
     v4 = {"mdx_sections": {"04-1": {"judgments_full32": []}}}
     out = align_sections_to_v4_granularity(sections, v4)
@@ -119,6 +121,63 @@ def test_align_passthrough_when_v4_key_exact_match():
     assert out[0].section_id == "04-1"
 
 
+def test_align_parent_v4_exact_keeps_section_when_no_override_targets_sub():
+    # Backward-compat axis: when V4 carries the parent exact key and no
+    # drag/drop override targets a sub-id of this section, the aligner
+    # MUST keep the parent (preserves V4 evidence at parent granularity).
+    raw = "### 2.1 First\nbody1\n### 2.2 Second\nbody2\n"
+    sections = [_section("03-2", 2, "2. Parent", raw)]
+    v4 = {"mdx_sections": {"03-2": {"judgments_full32": []}}}
+    out = align_sections_to_v4_granularity(sections, v4)
+    assert [s.section_id for s in out] == ["03-2"]
+
+
+def test_align_force_drills_when_override_targets_sub_id_with_parent_in_v4():
+    # Stage 5 R2 blocker-fix regression: when V4 has the parent exact key
+    # AND an override targets a sub-id of that section, the aligner MUST
+    # drill regardless of V4 parent presence. This makes drag/drop
+    # addressing deterministic across all V4 yaml shapes.
+    raw = "### 2.1 First\nbody1\n### 2.2 Second\nbody2\n"
+    sections = [_section("04-2", 2, "2. Parent", raw)]
+    v4 = {
+        "mdx_sections": {
+            "04-2": {"judgments_full32": []},      # parent V4 entry present
+            "04-2.1": {"judgments_full32": []},    # plus decimal sub entries
+            "04-2.2": {"judgments_full32": []},
+        }
+    }
+    out = align_sections_to_v4_granularity(
+        sections, v4, override_target_section_ids=["04-2-sub-1"]
+    )
+    # Force-drill: parent id MUST be replaced by canonical sub-ids.
+    assert [s.section_id for s in out] == ["04-2-sub-1", "04-2-sub-2"]
+    # Decimal aliases preserved (N-R5: decimal heading_number).
+    assert out[0].v4_alias_keys == ["04-2.1"]
+    assert out[1].v4_alias_keys == ["04-2.2"]
+
+
+def test_align_top_level_override_target_does_not_force_drill_other_sections():
+    # Top-level override target ("primary=03-1") has no derive_parent_id,
+    # so it MUST NOT force-drill any section. Only "X-sub-N" targets
+    # trigger force-drill on parent X.
+    raw = "### 2.1 First\nbody1\n"
+    sections = [
+        _section("03-1", 1, "1. Top", "body"),
+        _section("03-2", 2, "2. Parent", raw),
+    ]
+    v4 = {
+        "mdx_sections": {
+            "03-1": {"judgments_full32": []},
+            "03-2": {"judgments_full32": []},
+        }
+    }
+    out = align_sections_to_v4_granularity(
+        sections, v4, override_target_section_ids=["03-1"]
+    )
+    # No sub-id target -> both sections kept at parent granularity.
+    assert [s.section_id for s in out] == ["03-1", "03-2"]
+
+
 def test_align_drill_emits_canonical_ordinal_id_with_decimal_alias():
     # Decimal H3 headings -> canonical ordinal id + decimal alias (legacy V4 key).
     raw = "### 2.1 First\nbody1\n### 2.2 Second\nbody2\n"