feat(toolbox): F1 拆书 teardown 落库成项目 rules

- teardown_spec.writes=["rules"]（只声明 tier，入库仍经白名单 gate，不变量 #3）
- toolbox_registry teardown entry 加 ingest=IngestSpec(table="rules")
- routers/toolbox.py 通用 ingest dispatcher 加 _ingest_rules：
  BookTeardownResult(themes/archetypes/structure/hooks) 拍平为可读 rules 条目，
  落项目级（无 continuity 预检，仿 _ingest_outline 无 409）
- schemas/toolbox.py 加 TeardownIngestView + ToolIngestRequest.teardown
- 单测：teardown ingest→rules 真落行 + 预览(generate)不写库

后端门禁绿：ruff/format/mypy clean · alembic no drift · pytest 644 passed

apps/api/tests/test_toolbox_endpoints.py

@@ -31,6 +31,7 @@ from ww_core.domain.chapter_repo import ChapterDraftView, ChapterView
 from ww_core.domain.outline_write_repo import OutlineWriteView
 from ww_core.domain.project_repo import ProjectCreate
 from ww_core.domain.repositories import OutlineView
+from ww_core.domain.rule_repo import RuleWriteView
 from ww_core.domain.world_entity_repo import WorldEntityWriteView
 from ww_llm_gateway.types import LlmRequest, LlmResponse, ServedBy, Usage
 from ww_shared import AppError, ErrorCode
@@ -94,6 +95,17 @@ class _FakeOutlineWriteRepo:
         )
 
 
+class _FakeRuleWriteRepo:
+    """拆书入库 rules 用的内存替身：按 (level, content) 收行（只 flush 语义）。"""
+
+    def __init__(self) -> None:
+        self.rows: list[dict[str, Any]] = []
+
+    async def create(self, project_id: uuid.UUID, *, level: str, content: str) -> RuleWriteView:
+        self.rows.append({"project_id": project_id, "level": level, "content": content})
+        return RuleWriteView(project_id=project_id, level=level, content=content)
+
+
 class _FakeOutlineReadRepo:
     """续写/按章工具读节拍用的内存替身：缺章 → None（端点降级到空节拍）。"""
 
@@ -199,6 +211,7 @@ def _make_app(
     outline_write_repo: _FakeOutlineWriteRepo | None = None,
     chapter_repo: _FakeChapterRepo | None = None,
     outline_read_repo: _FakeOutlineReadRepo | None = None,
+    rule_write_repo: _FakeRuleWriteRepo | None = None,
     memory: Any = None,
     no_creds: bool = False,
 ) -> tuple[Any, FakeSession, _FakeWorldWriteRepo, _FakeOutlineWriteRepo]:
@@ -210,6 +223,7 @@ def _make_app(
         get_outline_read_repo,
         get_outline_write_repo,
         get_project_repo,
+        get_rule_write_repo,
         get_tier_gateway_builder,
         get_world_entity_write_repo,
     )
@@ -220,6 +234,7 @@ def _make_app(
     outline_write_repo = outline_write_repo or _FakeOutlineWriteRepo()
     chapter_repo = chapter_repo or _FakeChapterRepo()
     outline_read_repo = outline_read_repo or _FakeOutlineReadRepo()
+    rule_write_repo = rule_write_repo or _FakeRuleWriteRepo()
 
     async def _build_ok(_tier: str) -> Any:
         return gateway
@@ -236,6 +251,7 @@ def _make_app(
     app.dependency_overrides[get_outline_write_repo] = lambda: outline_write_repo
     app.dependency_overrides[get_chapter_repo] = lambda: chapter_repo
     app.dependency_overrides[get_outline_read_repo] = lambda: outline_read_repo
+    app.dependency_overrides[get_rule_write_repo] = lambda: rule_write_repo
     app.dependency_overrides[get_session] = lambda: session
     app.dependency_overrides[get_tier_gateway_builder] = lambda: (
         _build_no_creds if no_creds else _build_ok
@@ -285,10 +301,13 @@ async def test_list_toolbox_contains_all_keys() -> None:
         "teardown",
     }
     by_key = {t["key"]: t for t in tools}
-    # 4 个竞品生成器：非 legacy、纯预览（不可入库）。
-    for key in ("continue", "expand", "de-ai", "teardown"):
+    # 续写/扩写/降AI：非 legacy、纯预览（不可入库）。
+    for key in ("continue", "expand", "de-ai"):
         assert by_key[key]["is_legacy"] is False
         assert by_key[key]["ingestable"] is False
+    # F1：拆书非 legacy、可入库（落 rules）。
+    assert by_key["teardown"]["is_legacy"] is False
+    assert by_key["teardown"]["ingestable"] is True
     # legacy 携 legacy_route + is_legacy；新工具 ingestable 标记。
     assert by_key["worldbuilding"]["is_legacy"] is True
     assert by_key["worldbuilding"]["legacy_route"]
@@ -622,3 +641,72 @@ async def test_ingest_outline_upserts_scenes() -> None:
     assert outline_repo.rows[0]["beats"] == ["主角觉醒", "初遇反派"]
     assert outline_repo.rows[0]["chapter_no"] == 3
     assert session.commits == 1
+
+
+# ---- POST .../ingest（F1：拆书落库成 rules）----
+
+
+def _teardown_payload() -> dict[str, Any]:
+    return {
+        "teardown": {
+            "themes": ["逆袭", "复仇"],
+            "archetypes": ["废柴主角", "腹黑反派"],
+            "structure": "黄金三章立钩→铺垫→爆发",
+            "hooks": ["开局即巅峰", "扮猪吃虎"],
+        }
+    }
+
+
+@pytest.mark.asyncio
+async def test_ingest_teardown_writes_rules_201() -> None:
+    # F1：拆书结论拍平为可读 rules 条目落库（无 continuity 预检，仿 outline 无 409）。
+    repo = FakeProjectRepo()
+    pid = await _seed_project(repo)
+    rule_repo = _FakeRuleWriteRepo()
+    gateway = _SchemaRoutingGateway({})
+    app, session, *_ = _make_app(project_repo=repo, gateway=gateway, rule_write_repo=rule_repo)
+
+    async with _client(app) as client:
+        resp = await client.post(
+            f"/projects/{pid}/skills/teardown/ingest", json=_teardown_payload()
+        )
+
+    assert resp.status_code == 201
+    body = resp.json()
+    assert body["table"] == "rules"
+    assert body["rejected_tables"] == []
+    # 真落行：themes/archetypes/structure/hooks 各拼成可读规则条目。
+    assert len(rule_repo.rows) >= 1
+    contents = "\n".join(r["content"] for r in rule_repo.rows)
+    assert "逆袭" in contents
+    assert "废柴主角" in contents
+    assert "黄金三章立钩" in contents
+    assert "开局即巅峰" in contents
+    # 全部落到 project 级 rules（owner stub 单用户）。
+    for r in rule_repo.rows:
+        assert r["level"] == "project"
+        assert r["project_id"] == pid
+    assert session.commits == 1
+
+
+@pytest.mark.asyncio
+async def test_teardown_generate_preview_does_not_write_rules() -> None:
+    # 负向：预览（generate）只产结构化产物，绝不写 rules（不变量 #3：入库经 ingest gate）。
+    repo = FakeProjectRepo()
+    pid = await _seed_project(repo)
+    rule_repo = _FakeRuleWriteRepo()
+    parsed = BookTeardownResult(
+        themes=["逆袭"], archetypes=["废柴主角"], structure="立钩", hooks=["开局巅峰"]
+    )
+    gateway = _CaptureGateway(parsed)
+    app, _, *_ = _make_app(project_repo=repo, gateway=gateway, rule_write_repo=rule_repo)
+
+    async with _client(app) as client:
+        resp = await client.post(
+            f"/projects/{pid}/skills/teardown/generate",
+            json={"kind": "某爆款", "text": "样本章节正文……"},
+        )
+
+    assert resp.status_code == 200
+    assert resp.json()["output_kind"] == "BookTeardownResult"
+    assert rule_repo.rows == []  # 预览不写库