diff --git a/app/api/dashboard.py b/app/api/dashboard.py
index 94bdbc8..777f67e 100644
--- a/app/api/dashboard.py
+++ b/app/api/dashboard.py
@@ -136,7 +136,7 @@ async def get_dashboard(
         text("""
             SELECT
                 COUNT(*) AS total,
-                COUNT(*) FILTER (WHERE source_channel != 'news' AND file_type != 'note') AS documents,
+                COUNT(*) FILTER (WHERE source_channel NOT IN ('news', 'law_monitor') AND file_type != 'note') AS documents,
                 COUNT(*) FILTER (WHERE source_channel = 'memo' AND file_type = 'note') AS memos,
                 COUNT(*) FILTER (WHERE source_channel = 'news') AS news
             FROM documents WHERE deleted_at IS NULL
diff --git a/app/api/documents.py b/app/api/documents.py
index eed8b6f..89ec126 100644
--- a/app/api/documents.py
+++ b/app/api/documents.py
@@ -417,9 +417,10 @@ async def list_documents(
         # 명시적 카테고리 필터 — 기본 exclude 해제
         query = query.where(Document.category == category)
     else:
-        # 기본 목록: 뉴스/메모 제외 (문서함 용도)
+        # 기본 목록: 뉴스/메모/법령 제외 (문서함 용도)
         query = query.where(
             Document.source_channel != "news",
+            Document.source_channel != "law_monitor",
             Document.file_type != "note",
         )
 
diff --git a/app/models/document.py b/app/models/document.py
index e464af6..af69454 100644
--- a/app/models/document.py
+++ b/app/models/document.py
@@ -103,10 +103,10 @@ class Document(Base):
     title: Mapped[str | None] = mapped_column(Text)
 
     # 카테고리 (1차 진입점 — UI 탭/라우트 분기)
-    # 6 활성: document / library / news / memo / audio / video
+    # 7 활성: document / library / news / memo / audio / video / law
     # 3 유보: mail / calendar / plex
     category: Mapped[str | None] = mapped_column(
-        Enum("document", "library", "news", "memo", "audio", "video",
+        Enum("document", "library", "news", "memo", "audio", "video", "law",
              "mail", "calendar", "plex",
              name="doc_category", create_type=False)
     )
diff --git a/app/workers/classify_worker.py b/app/workers/classify_worker.py
index d10a8b8..cce5cd7 100644
--- a/app/workers/classify_worker.py
+++ b/app/workers/classify_worker.py
@@ -71,6 +71,20 @@ async def process(document_id: int, session: AsyncSession) -> None:
     if not doc:
         raise ValueError(f"문서 ID {document_id}를 찾을 수 없음")
 
+    # 법령은 구조 고정 + 외부 source of truth (law.go.kr) + 자동 재수집.
+    # AI 분류 skip, downstream(embed/chunk) 은 queue_consumer NEXT_STAGES 가 자동 chain.
+    # ai_domain 단일 "법령" — PR-A policy.domain_policy.yaml 에서 source_channel 기준 세분화.
+    if doc.source_channel == "law_monitor":
+        if not doc.ai_domain:
+            doc.ai_domain = "법령"
+        if not doc.ai_tags:
+            doc.ai_tags = ["법령"]
+        if not doc.importance:
+            doc.importance = "medium"
+        await session.commit()
+        logger.info(f"doc {document_id}: law_monitor → classify skip")
+        return
+
     if not doc.extracted_text:
         raise ValueError(f"문서 ID {document_id}: extracted_text가 비어있음")
 
diff --git a/app/workers/law_monitor.py b/app/workers/law_monitor.py
index e95bbb6..5212592 100644
--- a/app/workers/law_monitor.py
+++ b/app/workers/law_monitor.py
@@ -271,6 +271,7 @@ async def _save_law_split(
             title=f"{law_name} ({proclamation_date}) {section_name}",
             source_channel="law_monitor",
             data_origin="work",
+            category="law",
             user_note=note or None,
         )
         session.add(doc)
diff --git a/frontend/src/lib/components/Sidebar.svelte b/frontend/src/lib/components/Sidebar.svelte
index 0742713..9be1f3d 100644
--- a/frontend/src/lib/components/Sidebar.svelte
+++ b/frontend/src/lib/components/Sidebar.svelte
@@ -177,7 +177,7 @@
       <Clock size={14} /> 최근 7일
     </button>
     <button
-      onclick={() => { const p = new URLSearchParams(); p.set('source', 'law_monitor'); goto(`/documents?${p}`, { noScroll: true }); }}
+      onclick={() => { const p = new URLSearchParams(); p.set('category', 'law'); goto(`/documents?${p}`, { noScroll: true }); }}
       class="w-full flex items-center gap-2 px-3 py-1.5 rounded-md text-sm text-dim hover:bg-surface hover:text-text"
     >
       <Scale size={14} /> 법령 알림
diff --git a/migrations/152_category_law.sql b/migrations/152_category_law.sql
new file mode 100644
index 0000000..ff88376
--- /dev/null
+++ b/migrations/152_category_law.sql
@@ -0,0 +1,8 @@
+-- 152_category_law.sql
+-- doc_category enum 에 'law' 추가 — 법령 문서 전용 카테고리.
+-- plan: ~/.claude/plans/stateless-churning-raccoon.md
+--
+-- 주의: _run_migrations 는 단일 outer 트랜잭션으로 실행됨.
+-- PG16 제약상 이 migration 안에서는 'law' 값을 INSERT/UPDATE 에 사용 불가.
+-- 기존 206건 law_monitor 행의 category 갱신은 scripts/backfill_category.py 에서 별도 트랜잭션으로 처리.
+ALTER TYPE doc_category ADD VALUE IF NOT EXISTS 'law';
diff --git a/scripts/backfill_category.py b/scripts/backfill_category.py
index 555673f..d15e4b1 100644
--- a/scripts/backfill_category.py
+++ b/scripts/backfill_category.py
@@ -1,13 +1,21 @@
 """§1 백필 — documents.category 전체 행 채우기.
 
 plan: luminous-sprouting-hamster.md §1
+확장: stateless-churning-raccoon.md (law 카테고리 분기 + idempotent 재실행)
 
-매핑 규칙 (category IS NULL 인 모든 행 대상):
+매핑 규칙:
+  source_channel='law_monitor'            → category='law'
   source_channel='news'                   → category='news'
   source_channel='memo'                   → category='memo'
+  file_type='note'                        → category='memo'
   user_tags 에 '@library/' 태그 보유      → category='library'
   그 외                                    → category='document'
 
+대상 WHERE:
+  category IS NULL
+  OR (source_channel='law_monitor' AND category='document')
+  — law 신규 enum 도입 전 backfill 로 'document' 배정됐던 206건 재분류.
+
 자동 library 전이 금지 — 기존 @library/ 태그 보유분만 'library' 로 이행.
 audio/video 는 §3 이후 생성 (백필 대상 없음).
 
@@ -36,6 +44,7 @@ WITH classified AS (
   SELECT
     id,
     CASE
+      WHEN source_channel = 'law_monitor'                             THEN 'law'
       WHEN source_channel = 'news'                                    THEN 'news'
       WHEN source_channel = 'memo'                                    THEN 'memo'
       WHEN file_type      = 'note'                                    THEN 'memo'
@@ -49,6 +58,7 @@ WITH classified AS (
     END AS target_category
   FROM documents
   WHERE category IS NULL
+     OR (source_channel = 'law_monitor' AND category = 'document')
 )
 SELECT target_category, COUNT(*) AS n FROM classified GROUP BY 1 ORDER BY 2 DESC;
 """
@@ -56,6 +66,7 @@ SELECT target_category, COUNT(*) AS n FROM classified GROUP BY 1 ORDER BY 2 DESC
 APPLY_SQL = """
 UPDATE documents
    SET category = CASE
+     WHEN source_channel = 'law_monitor'                             THEN 'law'::doc_category
      WHEN source_channel = 'news'                                    THEN 'news'::doc_category
      WHEN source_channel = 'memo'                                    THEN 'memo'::doc_category
      WHEN file_type      = 'note'                                    THEN 'memo'::doc_category
@@ -67,7 +78,8 @@ UPDATE documents
      )                                                                THEN 'library'::doc_category
      ELSE                                                                  'document'::doc_category
    END
- WHERE category IS NULL;
+ WHERE category IS NULL
+    OR (source_channel = 'law_monitor' AND category = 'document');
 """
 
 VERIFY_SQL = """
@@ -82,7 +94,9 @@ SELECT
          COALESCE(user_tags, '[]'::jsonb)
        ) AS t
        WHERE t LIKE '@library/%'
-     ))                                                                       AS has_library_tag;
+     ))                                                                       AS has_library_tag,
+  (SELECT COUNT(*) FROM documents WHERE category = 'law')                     AS cat_law,
+  (SELECT COUNT(*) FROM documents WHERE source_channel = 'law_monitor')       AS law_source_count;
 """
 
 DIST_SQL = """
@@ -138,11 +152,13 @@ async def run(apply: bool) -> int:
         # 4. verify
         print("\n=== 백필 후 검증 ===")
         row = (await session.execute(text(VERIFY_SQL))).one()
-        print(f"  all_rows         = {row.all_rows}")
-        print(f"  categorized      = {row.categorized}")
-        print(f"  uncategorized    = {row.uncategorized}")
-        print(f"  cat_library      = {row.cat_library}")
-        print(f"  has_library_tag  = {row.has_library_tag}")
+        print(f"  all_rows          = {row.all_rows}")
+        print(f"  categorized       = {row.categorized}")
+        print(f"  uncategorized     = {row.uncategorized}")
+        print(f"  cat_library       = {row.cat_library}")
+        print(f"  has_library_tag   = {row.has_library_tag}")
+        print(f"  cat_law           = {row.cat_law}")
+        print(f"  law_source_count  = {row.law_source_count}")
 
         fail = []
         if row.uncategorized != 0:
@@ -154,6 +170,11 @@ async def run(apply: bool) -> int:
                 f"cat_library={row.cat_library} != has_library_tag={row.has_library_tag} "
                 "(자동 전이 없음 정책 위반)"
             )
+        if row.cat_law != row.law_source_count:
+            fail.append(
+                f"cat_law={row.cat_law} != law_source_count={row.law_source_count} "
+                "(law_monitor 전체가 category='law' 여야 함)"
+            )
         if fail:
             print("\n!! 검증 실패:")
             for f in fail: