feat(toolbox): T6 创作工具箱通用生成器框架 — 8 新生成器 + 声明驱动落地页 + P2 收尾

通用执行路径驱动全部生成器（"加生成器=加一份声明"）：
- @llm: ww_agents +7 输出 schema + 7 spec（book-title/blurb/name/golden-finger/
  glossary/opening/fine-outline，只声明 tier）+ build_outline_chapter_context
- @backend: ww_skills GeneratorTool 描述符 + TOOLBOX(11) + get_tool；3 通用端点
  GET /skills/toolbox · POST .../skills/{tool_key}/generate(预览不写库,仅记账) ·
  POST .../ingest(复用 continuity 409 + partition_writes 白名单)；纯 context 派发
- @frontend: 工具箱落地页 RSC + 声明驱动 GeneratorRunner + lib/toolbox 纯函数
  + LeftNav「工具箱」+ ⌘K nav-toolbox/action-gen-*；legacy 3 跳现页
- @qa: tests/test_t6_toolbox_e2e.py 5 用例真 pg + mock 网关零 token，无端点 bug
- P2 收尾: 限流→decisions.md 记延后(单用户原型)；noopener/Committable 早已修

守不变量 #2(只声明 tier)/#3(预览不写库,入库经验收 gate)/#9(缓存前缀)。无 DB 迁移。
门禁绿: 后端 ruff/format/mypy 195/alembic 无漂移/pytest 583；前端 lint/tsc/vitest 279/build。
spec 回写 PRODUCT_SPEC §7 + ARCHITECTURE §7.2 端点表。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/agents/tests/test_toolbox_specs.py

@@ -0,0 +1,84 @@
+"""T6 创作工具箱 · 7 个文本生成器的 spec 契约测试。
+
+契约测试——校验每个 spec 的 name/tier/reads/writes/output_schema/scope/input_schema，
+对齐不变量 #2（只声明 tier）/ #3（writes 经验收才生效）。不联网、无 DB。
+"""
+
+from __future__ import annotations
+
+import pytest
+from ww_agents import (
+    AgentSpec,
+    BlurbResult,
+    DetailedOutlineResult,
+    GlossaryResult,
+    GoldenFingerResult,
+    NameListResult,
+    OpeningResult,
+    TitleListResult,
+    blurb_spec,
+    book_title_spec,
+    fine_outline_spec,
+    glossary_spec,
+    golden_finger_spec,
+    name_spec,
+    opening_spec,
+)
+
+# (spec, name, tier, reads, writes, output_schema)
+_TOOLBOX_SPECS = [
+    (book_title_spec, "book-title", "light", ["projects"], [], TitleListResult),
+    (blurb_spec, "blurb", "analyst", ["projects"], [], BlurbResult),
+    (name_spec, "name", "light", ["projects", "world_entities", "characters"], [], NameListResult),
+    (
+        golden_finger_spec,
+        "golden-finger",
+        "writer",
+        ["projects", "world_entities"],
+        ["world_entities"],
+        GoldenFingerResult,
+    ),
+    (
+        glossary_spec,
+        "glossary",
+        "analyst",
+        ["projects", "world_entities"],
+        ["world_entities"],
+        GlossaryResult,
+    ),
+    (opening_spec, "opening", "writer", ["projects", "outline"], [], OpeningResult),
+    (
+        fine_outline_spec,
+        "fine-outline",
+        "analyst",
+        ["projects", "outline"],
+        ["outline"],
+        DetailedOutlineResult,
+    ),
+]
+
+
+@pytest.mark.parametrize(
+    ("spec", "name", "tier", "reads", "writes", "output_schema"),
+    _TOOLBOX_SPECS,
+)
+def test_toolbox_spec_declares_expected_contract(
+    spec: AgentSpec,
+    name: str,
+    tier: str,
+    reads: list[str],
+    writes: list[str],
+    output_schema: type,
+) -> None:
+    assert spec.name == name
+    assert spec.tier == tier
+    assert spec.reads == reads
+    assert spec.writes == writes
+    assert spec.output_schema is output_schema
+    assert spec.scope == "builtin"
+    assert spec.input_schema is None  # 注入材料为序列化文本，非结构化入参
+
+
+@pytest.mark.parametrize("spec", [row[0] for row in _TOOLBOX_SPECS])
+def test_toolbox_spec_has_nonempty_system_prompt(spec: AgentSpec) -> None:
+    assert spec.system_prompt.strip()