refactor: unify media capability contracts

app/runtime/extensions/module/contracts.py

@@ -16,6 +16,7 @@ class ModuleResultAggregation(StrEnum):
     FIRST_NON_EMPTY = "first_non_empty"
     ORDERED_LIST_MERGE = "ordered_list_merge"
     ORDERED_MAPPING_MERGE = "ordered_mapping_merge"
+    PIPELINE_RELAY = "pipeline_relay"
 
 
 class ModuleResultShape(StrEnum):
@@ -80,10 +81,11 @@ _METHOD_CONTRACTS = {
     ),
     "search_medias": ModuleMethodContract(
         family="media-recognition", input_contract="MediaSearchRequest",
-        result_contract="list[MediaInfo]", aggregation=ModuleResultAggregation.ORDERED_LIST_MERGE,
+        result_contract="list[MediaInfo]", result_shape=ModuleResultShape.LIST,
+        aggregation=ModuleResultAggregation.ORDERED_LIST_MERGE,
         required_parameters=("meta", "media_source"),
     ),
-    "obtain_images": ModuleMethodContract(family="media-recognition", input_contract="MediaInfo", result_contract="MediaInfo | None", required_parameters=("mediainfo",)),
+    "obtain_images": ModuleMethodContract(family="media-recognition", input_contract="MediaInfo", result_contract="MediaInfo | None", aggregation=ModuleResultAggregation.PIPELINE_RELAY, required_parameters=("mediainfo",)),
     "media_category": ModuleMethodContract(family="media-recognition", input_contract="MediaCategoryRequest", result_contract="CategoryConfig | None"),
     "mediaserver_items": ModuleMethodContract(family="media-server", input_contract="MediaServerItemsRequest", result_contract="list[MediaServerItem]", aggregation=ModuleResultAggregation.ORDERED_LIST_MERGE, required_parameters=("server", "library_id", "start_index", "limit")),
     "mediaserver_iteminfo": ModuleMethodContract(family="media-server", input_contract="MediaServerItemRequest", result_contract="MediaServerItem | None", aggregation=ModuleResultAggregation.FIRST_NON_EMPTY, required_parameters=("server", "item_id")),
@@ -128,6 +130,13 @@ _METHOD_CONTRACTS = {
     "update_torrent": ModuleMethodContract(family="downloader", input_contract="TorrentUpdateRequest", result_contract="dict[str, bool] | None", result_shape=ModuleResultShape.MAPPING, aggregation=ModuleResultAggregation.FIRST_NON_EMPTY, required_parameters=("hash_string", "downloader", "download_limit", "upload_limit", "tracker_list", "save_path", "category", "ratio_limit", "seeding_time_limit")),
 }
 
+# 同一能力的同步/异步入口共享不可变契约对象，避免参数和聚合语义各自漂移。
+_METHOD_CONTRACTS.update({
+    "async_recognize_media": _METHOD_CONTRACTS["recognize_media"],
+    "async_search_medias": _METHOD_CONTRACTS["search_medias"],
+    "async_obtain_images": _METHOD_CONTRACTS["obtain_images"],
+})
+
 _PREFIX_CONTRACTS = (
     ("async_tmdb_", ModuleMethodContract(family="tmdb")),
     ("tmdb_", ModuleMethodContract(family="tmdb")),

app/runtime/extensions/module/dispatcher.py

@@ -389,6 +389,10 @@ class ModuleInvocationDispatcher:
                 if isinstance(result, dict)
                 else _ProviderCallMode.STOP
             )
+        if aggregation in {
+            ModuleResultAggregation.LEGACY,
+            ModuleResultAggregation.PIPELINE_RELAY,
+        }:
             if allow_relay and ObjectUtils.check_signature(func, result):
                 return _ProviderCallMode.RELAY
             if isinstance(result, list):

docs/refactor/backend-architecture-next-stage.md

@@ -91,7 +91,7 @@
    `shield` 不再让网络请求逃逸生命周期预算，仓库级并发合并、缓存键和 V1/V2/V3 返回兼容保持不变。
    请求作用域的结构化并发不进入全局登记器：传统 WebAgent SSE 的 collection 子任务改由生成器
    `finally` 取消并等待清理，断线和 ASGI 取消均不会留下请求级 task。
-2. **动态模块契约仍以 legacy 聚合语义为主。** 当前登记 `212` 个模块方法，其中 `172` 个仍使用 `legacy` aggregation，`33` 个使用 `first_non_empty`、`6` 个使用 `ordered_list_merge`、`1` 个使用 `ordered_mapping_merge`。`app/runtime/extensions/module/contracts.py` 已能登记 family、输入/结果标签和基础签名诊断，调度器也已按这 40 个显式聚合声明执行首个非空、有序列表或有序映射合并；但 `170` 个方法没有 required parameters，其余方法仍主要依赖运行时反射、返回值形状和旧短路规则。未知第三方方法保留 legacy fallback 是兼容要求，不应删除；宿主高频能力则应逐族补齐可执行的输入校验、结果校验、超时和错误语义。
+2. **动态模块契约仍以 legacy 聚合语义为主。** 当前登记 `212` 个模块方法，其中 `168` 个仍使用 `legacy` aggregation，`34` 个使用 `first_non_empty`、`7` 个使用 `ordered_list_merge`、`1` 个使用 `ordered_mapping_merge`、`2` 个使用 `pipeline_relay`。`app/runtime/extensions/module/contracts.py` 已能登记 family、输入/结果标签和基础签名诊断，调度器也已按这 44 个显式聚合声明执行首个非空、有序集合合并或接力管道；但 `167` 个方法没有 required parameters，其余方法仍主要依赖运行时反射、返回值形状和旧短路规则。未知第三方方法保留 legacy fallback 是兼容要求，不应删除；宿主高频能力则应逐族补齐可执行的输入校验、结果校验、超时和错误语义。
 3. **Model/Base 的数据库装饰器和隐式会话 ABI 已全部清零。** 查询、写事务和 `legacy_*` 装饰器均为 `0`；所有 Model `db` 参数要求显式 Session，Base CRUD 仅在调用方事务内查询或 stage。可无会话构造的入口统一留在 Oper，经组合根事务执行器运行；插件 SDK 不再导出宿主 Model。后续重点转为减少 ORM 对象跨层流转，并保持 Model 隐式事务零回退。
 
    Oper 内部的执行入口也已统一：最后一处 `AgentTaskOper` 直接 transaction runner 调用已迁入
@@ -804,6 +804,10 @@ ModuleMethodSpec(
 - qBittorrent、Transmission、rTorrent 共享的 `download`、删除、启停、标签与更新 6 个目标选择动作已冻结
   一致参数和首个非空结果语义；bool/dict 结果启用基础形状诊断，tuple 下载结果保持业务合同标签而不强制
   Python 形状。广播型 `download_added` / `transfer_completed` 和管道型 `filter_torrents` 继续保留 legacy。
+- 识别与搜索的 sync/async 方法现在复用同一个不可变契约对象，`async_recognize_media` 与
+  `async_search_medias` 不再落入不同 family/aggregation；同步、异步 `obtain_images` 也统一登记为显式
+  `pipeline_relay`，按宿主优先级把同一 `MediaInfo` 交给后续图片 provider。未知插件方法和 legacy 接力
+  仍使用原算法，插件先返回非空对象时继续优先短路宿主。
 
 #### ARCH-241：Event Contract Registry
 

tests/fixtures/architecture/runtime-contract-baseline.json

@@ -2972,15 +2972,17 @@
       "version": 1
     },
     "async_obtain_images": {
-      "aggregation": "legacy",
+      "aggregation": "pipeline_relay",
       "error_policy": "isolate_provider",
       "execution": "sync_or_async",
       "family": "media-recognition",
-      "input_contract": "MediaRecognitionKeywordArguments",
+      "input_contract": "MediaInfo",
       "plugin_short_circuit": true,
       "public_to_plugins": true,
-      "required_parameters": [],
+      "required_parameters": [
-      "result_contract": "MediaRecognitionProviderResult",
+        "mediainfo"
+      ],
+      "result_contract": "MediaInfo | None",
       "result_shape": "any",
       "supports_async": true,
       "supports_sync": true,
@@ -2988,15 +2990,22 @@
       "version": 1
     },
     "async_recognize_media": {
-      "aggregation": "legacy",
+      "aggregation": "first_non_empty",
       "error_policy": "isolate_provider",
       "execution": "sync_or_async",
       "family": "media-recognition",
-      "input_contract": "MediaRecognitionKeywordArguments",
+      "input_contract": "MediaRecognitionRequest",
       "plugin_short_circuit": true,
       "public_to_plugins": true,
-      "required_parameters": [],
+      "required_parameters": [
-      "result_contract": "MediaRecognitionProviderResult",
+        "cache",
+        "episode_group",
+        "media_id",
+        "media_source",
+        "meta",
+        "mtype"
+      ],
+      "result_contract": "MediaInfo | None",
       "result_shape": "any",
       "supports_async": true,
       "supports_sync": true,
@@ -3036,16 +3045,19 @@
       "version": 1
     },
     "async_search_medias": {
-      "aggregation": "legacy",
+      "aggregation": "ordered_list_merge",
       "error_policy": "isolate_provider",
       "execution": "sync_or_async",
-      "family": "media-discovery",
+      "family": "media-recognition",
-      "input_contract": "MediaDiscoveryKeywordArguments",
+      "input_contract": "MediaSearchRequest",
       "plugin_short_circuit": true,
       "public_to_plugins": true,
-      "required_parameters": [],
+      "required_parameters": [
-      "result_contract": "MediaDiscoveryProviderResult",
+        "media_source",
-      "result_shape": "any",
+        "meta"
+      ],
+      "result_contract": "list[MediaInfo]",
+      "result_shape": "list",
       "supports_async": true,
       "supports_sync": true,
       "timeout_policy": "caller_budget",
@@ -4899,7 +4911,7 @@
       "version": 1
     },
     "obtain_images": {
-      "aggregation": "legacy",
+      "aggregation": "pipeline_relay",
       "error_policy": "isolate_provider",
       "execution": "sync_or_async",
       "family": "media-recognition",
@@ -5121,7 +5133,7 @@
         "meta"
       ],
       "result_contract": "list[MediaInfo]",
-      "result_shape": "any",
+      "result_shape": "list",
       "supports_async": true,
       "supports_sync": true,
       "timeout_policy": "caller_budget",

tests/test_module_invocation_dispatcher.py

@@ -167,6 +167,43 @@ def test_system_signature_relay_passes_previous_result() -> None:
     assert dispatcher.dispatch("execute") == {"value": 2}
 
 
+def test_explicit_pipeline_contract_relays_previous_result() -> None:
+    """图片补全契约应按优先级把上一 provider 结果交给下一 provider。"""
+    class ImageModule:
+        """在统一媒体对象上记录当前图片 provider。"""
+
+        def __init__(self, name: str, priority: int) -> None:
+            """保存 provider 名称和优先级。"""
+            self._name = name
+            self._priority = priority
+
+        def get_name(self) -> str:
+            """返回测试模块名。"""
+            return self._name
+
+        def get_priority(self) -> int:
+            """返回测试优先级。"""
+            return self._priority
+
+        def obtain_images(self, mediainfo: dict) -> dict:
+            """追加当前 provider 名称并返回同一媒体结果。"""
+            return {
+                **mediainfo,
+                "providers": [*mediainfo.get("providers", []), self._name],
+            }
+
+    dispatcher, _, _, _ = _dispatcher(
+        modules=[
+            ImageModule("fanart", 20),
+            ImageModule("tmdb", 10),
+        ]
+    )
+
+    assert dispatcher.dispatch("obtain_images", mediainfo={}) == {
+        "providers": ["tmdb", "fanart"]
+    }
+
+
 def test_first_non_empty_contract_stops_legacy_signature_relay() -> None:
     """显式首个非空契约不得再把结果交给后续宿主 provider 改写。"""
     class FirstModule:

tests/test_module_method_contracts.py

@@ -214,6 +214,23 @@ def test_downloader_action_contracts_freeze_shared_provider_signatures() -> None
         assert contract.required_parameters == parameters
 
 
+def test_sync_and_async_media_capabilities_share_contracts() -> None:
+    """同一识别能力的同步与异步入口必须复用完全相同的契约。"""
+    for sync_method, async_method in (
+        ("recognize_media", "async_recognize_media"),
+        ("search_medias", "async_search_medias"),
+        ("obtain_images", "async_obtain_images"),
+    ):
+        assert get_module_method_contract(sync_method) is get_module_method_contract(
+            async_method
+        )
+
+    assert (
+        get_module_method_contract("obtain_images").aggregation
+        is ModuleResultAggregation.PIPELINE_RELAY
+    )
+
+
 def test_attachment_result_diagnostics_distinguish_bytes_and_strings() -> None:
     """附件契约应区分二进制内容和可展示字符串，偏差仍仅供诊断。"""
     assert diagnose_module_result("download_qq_file_bytes", b"content") == ()