diff --git a/app/api/endpoints/plugin.py b/app/api/endpoints/plugin.py
index e846096ec..7c1b4608e 100644
--- a/app/api/endpoints/plugin.py
+++ b/app/api/endpoints/plugin.py
@@ -28,6 +28,7 @@ from app.api.principal import ApiPrincipal
 from app.api.response import ResponseAPIRouter
 from app.application.commands import init_commands
 from app.application.configuration import get_api_runtime_config_snapshot, get_configured_system_config
+from app.application.plugin.catalog import apply_declared_metadata_fallback
 from app.application.plugin.config import PluginConfigCommand
 from app.application.plugin.folders import remove_plugin_from_folders
 from app.application.plugin.gateway import get_plugin_install_service
@@ -234,14 +235,21 @@ async def _get_plugin_history_detail(
     installed_plugin = next(
         (
             plugin
-            for plugin in plugin_manager.get_local_plugins()
-            if plugin.id == plugin_id and plugin.installed
+            for plugin in plugin_manager.get_installed_plugins()
+            if plugin.id == plugin_id
         ),
         None,
     )
     if not installed_plugin:
         return None
 
+    identity = await get_plugin_persistence().get_identity(plugin_id)
+    if identity is not None:
+        installed_plugin = apply_declared_metadata_fallback(
+            [installed_plugin],
+            {identity.normalized_plugin_id: identity},
+        )[0]
+
     local_repo_plugin = next(
         (plugin for plugin in plugin_manager.get_local_repo_plugins() if plugin.id == plugin_id),
         None,
@@ -249,27 +257,35 @@ async def _get_plugin_history_detail(
     if local_repo_plugin:
         return _merge_plugin_market_metadata(installed_plugin, local_repo_plugin)
 
-    if installed_plugin.repo_url:
+    trusted_repo_url = None
+    if identity is not None and identity.trusted_source_key:
+        owner_repo = identity.trusted_source_key.removeprefix("github:")
+        trusted_repo_url = f"https://github.com/{owner_repo}"
+
+    if trusted_repo_url:
         market_plugin = await _get_market_plugin_from_repo(
-            plugin_manager, plugin_id, installed_plugin.repo_url, force
+            plugin_manager, plugin_id, trusted_repo_url, force
         )
         if not market_plugin:
             logger.debug(f"插件 {plugin_id} 未从来源仓库获取到更新说明，返回本地插件信息")
             return installed_plugin
         return _merge_plugin_market_metadata(installed_plugin, market_plugin)
 
-    market_plugin = next(
-        (
-            plugin
-            for plugin in await plugin_manager.async_get_online_plugins(force=force)
-            if plugin.id == plugin_id
-        ),
-        None,
-    )
-    if not market_plugin:
-        return installed_plugin
+    return installed_plugin
 
-    return _merge_plugin_market_metadata(installed_plugin, market_plugin)
+
+async def _installed_plugins_with_declared_metadata(
+    plugin_manager: PluginRuntime,
+) -> list[_SchemaPlugin]:
+    """批量读取身份，并为未加载插件补齐已提交的展示声明。"""
+    plugins = plugin_manager.get_installed_plugins()
+    identities = await get_plugin_persistence().list_identities(
+        [plugin.id for plugin in plugins if plugin.id]
+    )
+    return apply_declared_metadata_fallback(
+        plugins,
+        {identity.normalized_plugin_id: identity for identity in identities},
+    )
 
 
 @router.get("/", summary="所有插件", response_model=List[_SchemaPlugin])
@@ -281,14 +297,13 @@ async def all_plugins(
     """
     查询所有插件清单，包括本地插件和在线插件，插件状态：installed, market, all
     """
-    # 本地插件
     plugin_manager = get_plugin_manager()
-    local_plugins = plugin_manager.get_local_plugins()
-    # 已安装插件
-    installed_plugins = [plugin for plugin in local_plugins if plugin.installed]
+    installed_plugins = plugin_manager.get_installed_plugins()
     if state == "installed":
-        return plugin_manager.get_installed_plugins()
+        return await _installed_plugins_with_declared_metadata(plugin_manager)
 
+    # 本地插件
+    local_plugins = plugin_manager.get_local_plugins()
     # 未安装的本地插件
     not_installed_plugins = [plugin for plugin in local_plugins if not plugin.installed]
     # 本地插件仓库目录中的插件
@@ -305,7 +320,10 @@ async def all_plugins(
         if state == "market":
             # 返回未安装的本地插件
             return not_installed_plugins
-        return local_plugins
+        return (
+            await _installed_plugins_with_declared_metadata(plugin_manager)
+            + not_installed_plugins
+        )
 
     # 插件市场插件清单
     market_plugins = []
@@ -328,7 +346,10 @@ async def all_plugins(
         return market_plugins
 
     # 返回所有插件
-    return installed_plugins + market_plugins
+    return (
+        await _installed_plugins_with_declared_metadata(plugin_manager)
+        + market_plugins
+    )
 
 
 @router.get("/installed", summary="已安装插件", response_model=List[str])
diff --git a/app/application/plugin/admission.py b/app/application/plugin/admission.py
index 12f7d9f85..8cd4fbd47 100644
--- a/app/application/plugin/admission.py
+++ b/app/application/plugin/admission.py
@@ -6,6 +6,7 @@ from collections.abc import Mapping, Sequence
 from dataclasses import dataclass
 from datetime import datetime
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -60,14 +61,13 @@ class PluginInstallAdmission:
         payload_receipt: str,
         applied_at: datetime,
         declared_version: str | None = None,
+        manifest_matches_payload: bool = True,
     ) -> PluginIdentity:
         """在载荷落盘并生成收据后构造唯一数据库提交目标。"""
         current = self.identity_before
         plugin_id = current.plugin_id if current else self.candidate.plugin_id
         metadata = self.candidate.dto if isinstance(self.candidate.dto, Mapping) else {}
-        system_version = metadata.get("system_version")
-        supports_v3 = metadata.get("v3")
-        supports_v3t = metadata.get("v3t")
+        installed_version = declared_version or self.candidate.plugin_version
         source_binding_changed = (
             self.trusted_source_type is not TrustedPluginSourceType.UNKNOWN
             and (
@@ -89,13 +89,13 @@ class PluginInstallAdmission:
                 if isinstance(self.candidate, PluginLocalCandidate)
                 else self.candidate.source_key
             ),
-            declared_version=declared_version or self.candidate.plugin_version,
+            declared_version=installed_version,
             package_generation=self.candidate.package_generation,
-            system_version=(
-                system_version if isinstance(system_version, str) else None
+            declared_metadata=PluginDeclaredMetadata.from_package(
+                metadata,
+                declaration_version=self.candidate.plugin_version,
+                manifest_matches_payload=manifest_matches_payload,
             ),
-            supports_v3=supports_v3 if isinstance(supports_v3, bool) else None,
-            supports_v3t=supports_v3t if isinstance(supports_v3t, bool) else None,
             payload_receipt=payload_receipt,
             revision=(current.revision + 1) if current else 1,
             created_at=current.created_at if current else applied_at,
diff --git a/app/application/plugin/catalog.py b/app/application/plugin/catalog.py
index 537ba94ab..2c2005093 100644
--- a/app/application/plugin/catalog.py
+++ b/app/application/plugin/catalog.py
@@ -4,9 +4,11 @@ from __future__ import annotations
 
 import asyncio
 import concurrent.futures
-from collections.abc import Awaitable, Callable
+from collections.abc import Awaitable, Callable, Mapping, Sequence
 from typing import Any, Optional
 
+from app.application.plugin.identity import PluginIdentity
+from app.schemas.plugin import Plugin
 
 MarketLoader = Callable[[str, Optional[str], bool], Optional[dict[str, dict]]]
 AsyncMarketLoader = Callable[
@@ -17,6 +19,44 @@ PluginMapper = Callable[[str, dict, str, list[str], int, Optional[str]], Any]
 ProgressCallback = Callable[..., Any]
 
 
+def apply_declared_metadata_fallback(
+    plugins: Sequence[Plugin],
+    identities: Mapping[str, PluginIdentity],
+) -> list[Plugin]:
+    """用已提交快照补齐加载失败插件，不覆盖真实运行态字段。"""
+    result: list[Plugin] = []
+    for plugin in plugins:
+        identity = identities.get((plugin.id or "").lower())
+        if (
+            identity is None
+            or identity.declared_metadata is None
+            or identity.declared_version is None
+        ):
+            result.append(plugin)
+            continue
+        fallback = identity.declared_metadata.display_fallback(
+            installed_version=identity.declared_version
+        )
+        updates: dict[str, str] = {}
+        if not plugin.plugin_version:
+            updates["plugin_version"] = fallback["plugin_version"]
+        if (
+            (not plugin.plugin_name or plugin.plugin_name == plugin.id)
+            and "plugin_name" in fallback
+        ):
+            updates["plugin_name"] = fallback["plugin_name"]
+        if not plugin.plugin_desc and "plugin_desc" in fallback:
+            updates["plugin_desc"] = fallback["plugin_desc"]
+        if not plugin.plugin_icon and "plugin_icon" in fallback:
+            updates["plugin_icon"] = fallback["plugin_icon"]
+        if not plugin.plugin_author and "plugin_author" in fallback:
+            updates["plugin_author"] = fallback["plugin_author"]
+        if not plugin.plugin_label and "plugin_label" in fallback:
+            updates["plugin_label"] = fallback["plugin_label"]
+        result.append(plugin.model_copy(update=updates) if updates else plugin)
+    return result
+
+
 class PluginCatalogService:
     """负责插件市场索引映射、并发收集、代际合并和来源去重。"""
 
diff --git a/app/application/plugin/declaration.py b/app/application/plugin/declaration.py
new file mode 100644
index 000000000..8379975a7
--- /dev/null
+++ b/app/application/plugin/declaration.py
@@ -0,0 +1,207 @@
+"""已提交插件载荷的版本化 package 声明快照。"""
+
+from __future__ import annotations
+
+import json
+import re
+from collections.abc import Mapping
+from dataclasses import dataclass, field
+from typing import Any
+
+_SCHEMA_VERSION = 1
+_RUNTIME_FIELD_PATTERN = re.compile(r"^v[1-9][0-9]*t?$")
+_MANIFEST_TEXT_FIELDS = (
+    "name",
+    "description",
+    "icon",
+    "author",
+    "system_version",
+)
+
+
+def _optional_text(
+    value: object,
+    *,
+    max_length: int | None = None,
+) -> str | None:
+    """把外部可选文本规范为非空字符串。"""
+    if not isinstance(value, str):
+        return None
+    normalized = value.strip()
+    if max_length is not None and len(normalized) > max_length:
+        raise ValueError(f"插件声明文本长度不能超过 {max_length}")
+    return normalized or None
+
+
+def _labels(value: object) -> list[str]:
+    """把历史逗号字符串和字符串数组统一为有序标签列表。"""
+    if isinstance(value, str):
+        items = value.split(",")
+    elif isinstance(value, list):
+        items = value
+    else:
+        return []
+    return [
+        normalized
+        for item in items
+        if isinstance(item, str) and (normalized := item.strip())
+    ]
+
+
+def _normalize_manifest(value: object) -> dict[str, object]:
+    """仅保留当前载荷展示和声明消费者需要的 package 字段。"""
+    if not isinstance(value, Mapping):
+        return {}
+    manifest: dict[str, object] = {}
+    for field_name in _MANIFEST_TEXT_FIELDS:
+        if normalized := _optional_text(
+            value.get(field_name),
+            max_length=128 if field_name == "system_version" else None,
+        ):
+            manifest[field_name] = normalized
+    labels = _labels(value.get("labels"))
+    if labels:
+        manifest["labels"] = labels
+    level = value.get("level")
+    if isinstance(level, int) and not isinstance(level, bool):
+        manifest["level"] = level
+    release = value.get("release")
+    if isinstance(release, bool):
+        manifest["release"] = release
+    return manifest
+
+
+def _normalize_runtime(value: object) -> dict[str, bool]:
+    """保留可向后扩展的宿主代际和运行时变体布尔声明。"""
+    if not isinstance(value, Mapping):
+        return {}
+    return {
+        str(field_name): field_value
+        for field_name, field_value in value.items()
+        if (
+            isinstance(field_name, str)
+            and _RUNTIME_FIELD_PATTERN.fullmatch(field_name)
+            and isinstance(field_value, bool)
+        )
+    }
+
+
+def _encode(value: Mapping[str, object]) -> str:
+    """生成不可从外部原地修改的稳定内部表示。"""
+    return json.dumps(
+        value,
+        ensure_ascii=False,
+        sort_keys=True,
+        separators=(",", ":"),
+    )
+
+
+@dataclass(frozen=True, slots=True)
+class PluginDeclaredMetadata:
+    """封装一份受限、版本化且不参与来源授信的 package 声明。"""
+
+    _encoded: str = field(repr=False)
+
+    def __post_init__(self) -> None:
+        """拒绝绕过工厂构造的非规范内部状态。"""
+        normalized = self._normalize_storage(json.loads(self._encoded))
+        object.__setattr__(self, "_encoded", _encode(normalized))
+
+    @classmethod
+    def from_package(
+        cls,
+        package: Mapping[str, Any],
+        *,
+        declaration_version: str | None,
+        manifest_matches_payload: bool,
+    ) -> "PluginDeclaredMetadata":
+        """从安装候选生成与载荷一起提交的受限声明快照。"""
+        runtime = _normalize_runtime(package)
+        value = {
+            "schema_version": _SCHEMA_VERSION,
+            "declaration_version": _optional_text(declaration_version),
+            "manifest_matches_payload": manifest_matches_payload,
+            "manifest": _normalize_manifest(package),
+            "runtime": runtime,
+        }
+        return cls(_encode(value))
+
+    @classmethod
+    def from_storage(cls, value: object) -> "PluginDeclaredMetadata":
+        """校验数据库 JSON，并忽略当前合同未消费的额外字段。"""
+        return cls(_encode(cls._normalize_storage(value)))
+
+    @staticmethod
+    def _normalize_storage(value: object) -> dict[str, object]:
+        """验证快照结构，同时宽容丢弃非法可选展示字段。"""
+        if not isinstance(value, Mapping):
+            raise ValueError("插件声明快照必须是 JSON 对象")
+        if value.get("schema_version") != _SCHEMA_VERSION:
+            raise ValueError("插件声明快照 schema_version 不受支持")
+        manifest_matches_payload = value.get("manifest_matches_payload")
+        if not isinstance(manifest_matches_payload, bool):
+            raise ValueError("插件声明快照必须说明 manifest 是否对应当前载荷")
+        return {
+            "schema_version": _SCHEMA_VERSION,
+            "declaration_version": _optional_text(
+                value.get("declaration_version")
+            ),
+            "manifest_matches_payload": manifest_matches_payload,
+            "manifest": _normalize_manifest(value.get("manifest")),
+            "runtime": _normalize_runtime(value.get("runtime")),
+        }
+
+    @property
+    def declaration_version(self) -> str | None:
+        """返回生成该快照的 package 条目版本。"""
+        return _optional_text(self.to_json().get("declaration_version"))
+
+    @property
+    def manifest_matches_payload(self) -> bool:
+        """说明该 package 声明是否与当前已提交载荷对应。"""
+        return bool(self.to_json()["manifest_matches_payload"])
+
+    def runtime_support(self, runtime_name: str) -> bool | None:
+        """读取一个规范运行时声明；缺省保持未声明语义。"""
+        if not _RUNTIME_FIELD_PATTERN.fullmatch(runtime_name):
+            raise ValueError("运行时声明必须使用 v<数字> 或 v<数字>t")
+        runtime = self.to_json().get("runtime")
+        if not isinstance(runtime, dict):
+            return None
+        value = runtime.get(runtime_name)
+        return value if isinstance(value, bool) else None
+
+    def display_fallback(self, *, installed_version: str) -> dict[str, str]:
+        """生成插件加载失败时可安全补齐的展示字段。"""
+        manifest = self.to_json().get("manifest")
+        fallback = {
+            "plugin_version": installed_version,
+        }
+        if not isinstance(manifest, dict):
+            return fallback
+        display_fields = {
+            "name": "plugin_name",
+            "description": "plugin_desc",
+            "icon": "plugin_icon",
+            "author": "plugin_author",
+        }
+        for source_name, target_name in display_fields.items():
+            value = manifest.get(source_name)
+            if isinstance(value, str):
+                fallback[target_name] = value
+        labels = manifest.get("labels")
+        if isinstance(labels, list):
+            label = ",".join(item for item in labels if isinstance(item, str))
+            if label:
+                fallback["plugin_label"] = label
+        return fallback
+
+    def to_json(self) -> dict[str, object]:
+        """返回可持久化且与内部状态相互隔离的 JSON 副本。"""
+        value: object = json.loads(self._encoded)
+        if not isinstance(value, dict):
+            raise ValueError("插件声明快照内部状态必须是 JSON 对象")
+        return {
+            str(field_name): field_value
+            for field_name, field_value in value.items()
+        }
diff --git a/app/application/plugin/identity.py b/app/application/plugin/identity.py
index 637665773..12908382a 100644
--- a/app/application/plugin/identity.py
+++ b/app/application/plugin/identity.py
@@ -3,12 +3,14 @@
 from __future__ import annotations
 
 import re
-from collections.abc import Callable
+from collections.abc import Callable, Sequence
 from dataclasses import dataclass, replace
 from datetime import datetime
 from enum import StrEnum
 from typing import Protocol
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
+
 _PLUGIN_ID_PATTERN = re.compile(r"^[A-Za-z][A-Za-z0-9]{0,127}$")
 _ONLINE_SOURCE_KEY_PATTERN = re.compile(
     r"^github:[a-z0-9](?:[a-z0-9-]{0,38})/"
@@ -116,9 +118,7 @@ class PluginIdentity:
     payload_source_key: str | None
     declared_version: str | None
     package_generation: str | None
-    system_version: str | None
-    supports_v3: bool | None
-    supports_v3t: bool | None
+    declared_metadata: PluginDeclaredMetadata | None
     payload_receipt: str | None
     revision: int
     created_at: datetime
@@ -200,9 +200,7 @@ class PluginIdentity:
             if any((
                 self.declared_version,
                 self.package_generation,
-                self.system_version,
-                self.supports_v3 is not None,
-                self.supports_v3t is not None,
+                self.declared_metadata,
                 self.payload_receipt,
                 self.payload_applied_at,
             )):
@@ -210,6 +208,8 @@ class PluginIdentity:
         else:
             if not self.declared_version or not self.package_generation:
                 raise ValueError("已知载荷必须携带声明版本和包代际")
+            if self.declared_metadata is None:
+                raise ValueError("已知载荷必须携带已提交 package 声明快照")
             if self.payload_applied_at is None or self.payload_receipt is None:
                 raise ValueError("已知载荷必须携带应用时间和内容收据")
             if (
@@ -234,11 +234,6 @@ class PluginIdentity:
             field_name="插件声明版本",
             max_length=64,
         )
-        _validate_optional_text(
-            self.system_version,
-            field_name="插件系统版本要求",
-            max_length=128,
-        )
         object.__setattr__(self, "trusted_source_key", trusted_key)
         object.__setattr__(self, "payload_source_key", payload_key)
         object.__setattr__(self, "payload_receipt", _validate_receipt(self.payload_receipt))
@@ -320,9 +315,7 @@ def plan_legacy_plugin_identity(
         payload_source_key=None,
         declared_version=None,
         package_generation=None,
-        system_version=None,
-        supports_v3=None,
-        supports_v3t=None,
+        declared_metadata=None,
         payload_receipt=None,
         revision=1,
         created_at=now,
@@ -356,6 +349,9 @@ class PluginIdentityStore(Protocol):
     def get(self, plugin_id: str) -> PluginIdentity | None:
         """读取一个物理插件的来源身份。"""
 
+    def list(self, plugin_ids: Sequence[str]) -> list[PluginIdentity]:
+        """批量读取指定物理插件的来源身份。"""
+
     def compare_and_set(
         self,
         identity: PluginIdentity,
diff --git a/app/application/plugin/install.py b/app/application/plugin/install.py
index 4f7d3206e..b663ec88c 100644
--- a/app/application/plugin/install.py
+++ b/app/application/plugin/install.py
@@ -356,6 +356,10 @@ class PluginInstallCommand:
                 payload_receipt=receipt,
                 applied_at=self.__clock(),
                 declared_version=release_version,
+                manifest_matches_payload=(
+                    release_version is None
+                    or release_version == candidate.plugin_version
+                ),
             )
             await self.__await_side_effect(
                 self.__persistence.set_installation_target(
diff --git a/app/application/plugin/transaction.py b/app/application/plugin/transaction.py
index bb93fd0d4..a0055795d 100644
--- a/app/application/plugin/transaction.py
+++ b/app/application/plugin/transaction.py
@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import re
+from collections.abc import Sequence
 from dataclasses import dataclass
 from datetime import datetime
 from enum import StrEnum
@@ -166,6 +167,9 @@ class PluginIdentityPersistence(Protocol):
     def get(self, plugin_id: str) -> PluginIdentity | None:
         """读取一个物理插件的来源身份。"""
 
+    def list(self, plugin_ids: Sequence[str]) -> list[PluginIdentity]:
+        """批量读取指定物理插件的来源身份。"""
+
     def compare_and_set(
         self,
         identity: PluginIdentity,
@@ -202,6 +206,15 @@ class PluginPersistenceService:
         """在数据库 worker 中读取插件来源身份。"""
         return await self.__executor.run(partial(self.__identities.get, plugin_id))
 
+    async def list_identities(
+        self,
+        plugin_ids: Sequence[str],
+    ) -> list[PluginIdentity]:
+        """在一次数据库任务中批量读取插件来源身份。"""
+        return await self.__executor.run(
+            partial(self.__identities.list, tuple(plugin_ids))
+        )
+
     async def migrate_identity(
         self,
         identity: PluginIdentity,
diff --git a/app/db/adapters/pluginidentity.py b/app/db/adapters/pluginidentity.py
index bcda8ed9c..d34ef9d1f 100644
--- a/app/db/adapters/pluginidentity.py
+++ b/app/db/adapters/pluginidentity.py
@@ -1,11 +1,12 @@
 """插件来源身份 Application Port 的 SQLAlchemy 实现。"""
 
-from collections.abc import Callable
+from collections.abc import Callable, Sequence
 from datetime import datetime
 
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import Session
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     BindLocalPluginIdentityCommand,
     BindOnlinePluginIdentityCommand,
@@ -40,9 +41,11 @@ def _to_record(model: IdentityModel) -> PluginIdentity:
         payload_source_key=model.payload_source_key,
         declared_version=model.declared_version,
         package_generation=model.package_generation,
-        system_version=model.system_version,
-        supports_v3=model.supports_v3,
-        supports_v3t=model.supports_v3t,
+        declared_metadata=(
+            PluginDeclaredMetadata.from_storage(model.declared_metadata)
+            if model.declared_metadata is not None
+            else None
+        ),
         payload_receipt=model.payload_receipt,
         revision=model.revision,
         created_at=datetime.fromisoformat(model.created_at),
@@ -64,9 +67,11 @@ def _to_model(identity: PluginIdentity) -> IdentityModel:
         payload_source_key=identity.payload_source_key,
         declared_version=identity.declared_version,
         package_generation=identity.package_generation,
-        system_version=identity.system_version,
-        supports_v3=identity.supports_v3,
-        supports_v3t=identity.supports_v3t,
+        declared_metadata=(
+            identity.declared_metadata.to_json()
+            if identity.declared_metadata is not None
+            else None
+        ),
         payload_receipt=identity.payload_receipt,
         revision=identity.revision,
         created_at=identity.created_at.isoformat(),
@@ -92,6 +97,13 @@ class _SqlAlchemyIdentityRepository:
         model = self._oper.get_by_plugin_id(plugin_id)
         return _to_record(model) if model else None
 
+    def list(self, plugin_ids: Sequence[str]) -> list[PluginIdentity]:
+        """批量读取并映射指定来源身份。"""
+        return [
+            _to_record(model)
+            for model in self._oper.list_by_plugin_ids(plugin_ids)
+        ]
+
     def stage_create(self, identity: PluginIdentity) -> None:
         """暂存首次身份。"""
         try:
@@ -131,6 +143,20 @@ class TransactionalPluginIdentityStore:
         finally:
             session.close()
 
+    def list(self, plugin_ids: Sequence[str]) -> list[PluginIdentity]:
+        """在一个短会话内批量读取规范化插件身份。"""
+        normalized_ids = tuple(
+            dict.fromkeys(
+                normalize_physical_plugin_id(plugin_id)
+                for plugin_id in plugin_ids
+            )
+        )
+        session = self._session_factory()
+        try:
+            return _SqlAlchemyIdentityRepository(session).list(normalized_ids)
+        finally:
+            session.close()
+
     def compare_and_set(
         self,
         identity: PluginIdentity,
diff --git a/app/db/adapters/plugininstallation.py b/app/db/adapters/plugininstallation.py
index 780163b8e..67f5c621a 100644
--- a/app/db/adapters/plugininstallation.py
+++ b/app/db/adapters/plugininstallation.py
@@ -10,6 +10,7 @@ from sqlalchemy import func, select
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import Session
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -50,9 +51,11 @@ def _identity_from_model(model: IdentityModel) -> PluginIdentity:
         payload_source_key=model.payload_source_key,
         declared_version=model.declared_version,
         package_generation=model.package_generation,
-        system_version=model.system_version,
-        supports_v3=model.supports_v3,
-        supports_v3t=model.supports_v3t,
+        declared_metadata=(
+            PluginDeclaredMetadata.from_storage(model.declared_metadata)
+            if model.declared_metadata is not None
+            else None
+        ),
         payload_receipt=model.payload_receipt,
         revision=model.revision,
         created_at=datetime.fromisoformat(model.created_at),
@@ -82,9 +85,11 @@ def _identity_model_values(identity: PluginIdentity) -> dict[str, object]:
         "payload_source_key": identity.payload_source_key,
         "declared_version": identity.declared_version,
         "package_generation": identity.package_generation,
-        "system_version": identity.system_version,
-        "supports_v3": identity.supports_v3,
-        "supports_v3t": identity.supports_v3t,
+        "declared_metadata": (
+            identity.declared_metadata.to_json()
+            if identity.declared_metadata is not None
+            else None
+        ),
         "payload_receipt": identity.payload_receipt,
         "revision": identity.revision,
         "created_at": identity.created_at.isoformat(),
diff --git a/app/db/models/pluginidentity.py b/app/db/models/pluginidentity.py
index c175f6f4b..0fe84165d 100644
--- a/app/db/models/pluginidentity.py
+++ b/app/db/models/pluginidentity.py
@@ -1,8 +1,8 @@
 """已安装物理插件来源身份模型。"""
 
-from typing import Optional
+from typing import Any, Optional
 
-from sqlalchemy import Boolean, CheckConstraint, Integer, String, UniqueConstraint
+from sqlalchemy import JSON, CheckConstraint, Integer, String, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.db.base import Base, get_id_column
@@ -21,9 +21,9 @@ class PluginIdentity(Base):
     payload_source_key: Mapped[Optional[str]] = mapped_column(String(255))
     declared_version: Mapped[Optional[str]] = mapped_column(String(64))
     package_generation: Mapped[Optional[str]] = mapped_column(String(8))
-    system_version: Mapped[Optional[str]] = mapped_column(String(128))
-    supports_v3: Mapped[Optional[bool]] = mapped_column(Boolean)
-    supports_v3t: Mapped[Optional[bool]] = mapped_column(Boolean)
+    declared_metadata: Mapped[Optional[dict[str, Any]]] = mapped_column(
+        JSON(none_as_null=True)
+    )
     payload_receipt: Mapped[Optional[str]] = mapped_column(String(71))
     revision: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
     created_at: Mapped[str] = mapped_column(String(40), nullable=False)
diff --git a/app/db/oper/pluginidentity.py b/app/db/oper/pluginidentity.py
index afd02c193..37ae5d787 100644
--- a/app/db/oper/pluginidentity.py
+++ b/app/db/oper/pluginidentity.py
@@ -1,5 +1,6 @@
 """插件来源身份的数据访问原语。"""
 
+from collections.abc import Sequence
 from typing import cast
 
 from sqlalchemy import select, update
@@ -25,6 +26,23 @@ class PluginIdentityOper(DbOper):
             )
         )
 
+    def list_by_plugin_ids(
+        self,
+        plugin_ids: Sequence[str],
+    ) -> list[PluginIdentity]:
+        """批量读取规范化物理插件 ID 对应的身份。"""
+        if not plugin_ids:
+            return []
+        return list(
+            self._execute_sync_query(
+                lambda session: session.execute(
+                    select(PluginIdentity).where(
+                        PluginIdentity.normalized_plugin_id.in_(plugin_ids)
+                    )
+                ).scalars()
+            )
+        )
+
     def stage_create(self, identity: PluginIdentity) -> None:
         """暂存首次身份并立即暴露数据库唯一键竞争。"""
         def stage(session: Session) -> None:
diff --git a/database/versions/5f2a9c1e7b4d_3_0_12.py b/database/versions/5f2a9c1e7b4d_3_0_12.py
new file mode 100644
index 000000000..9c0f3102c
--- /dev/null
+++ b/database/versions/5f2a9c1e7b4d_3_0_12.py
@@ -0,0 +1,185 @@
+"""3.0.12 consolidate committed plugin package declarations.
+
+Revision ID: 5f2a9c1e7b4d
+Revises: a6c8e2f4b1d3
+Create Date: 2026-08-26
+"""
+
+from collections.abc import Mapping
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = "5f2a9c1e7b4d"
+down_revision = "a6c8e2f4b1d3"
+branch_labels = None
+depends_on = None
+
+_LEGACY_COLUMNS = {
+    "system_version",
+    "supports_v3",
+    "supports_v3t",
+}
+
+
+def _column_names() -> set[str]:
+    """返回当前插件身份表字段集合。"""
+    inspector = sa.inspect(op.get_bind())
+    if "pluginidentity" not in inspector.get_table_names():
+        return set()
+    return {
+        column["name"]
+        for column in inspector.get_columns("pluginidentity")
+    }
+
+
+def _legacy_snapshot(row: Mapping[str, object]) -> dict[str, object] | None:
+    """把旧固定声明列保守回填为仅供展示的版本化快照。"""
+    if row["payload_source_type"] == "unknown":
+        return None
+    manifest: dict[str, object] = {}
+    system_version = row.get("system_version")
+    if isinstance(system_version, str) and system_version.strip():
+        manifest["system_version"] = system_version.strip()
+    runtime = {
+        field_name.removeprefix("supports_"): row[field_name]
+        for field_name in ("supports_v3", "supports_v3t")
+        if isinstance(row.get(field_name), bool)
+    }
+    return {
+        "schema_version": 1,
+        "declaration_version": None,
+        "manifest_matches_payload": False,
+        "manifest": manifest,
+        "runtime": runtime,
+    }
+
+
+def _backfill_declared_metadata() -> None:
+    """只为仍有旧载荷事实且尚无快照的身份生成保守声明。"""
+    identity = sa.table(
+        "pluginidentity",
+        sa.column("id", sa.Integer()),
+        sa.column("payload_source_type", sa.String()),
+        sa.column("system_version", sa.String()),
+        sa.column("supports_v3", sa.Boolean()),
+        sa.column("supports_v3t", sa.Boolean()),
+        sa.column("declared_metadata", sa.JSON(none_as_null=True)),
+    )
+    connection = op.get_bind()
+    rows = connection.execute(
+        sa.select(
+            identity.c.id,
+            identity.c.payload_source_type,
+            identity.c.system_version,
+            identity.c.supports_v3,
+            identity.c.supports_v3t,
+        ).where(identity.c.declared_metadata.is_(None))
+    ).mappings().all()
+    for row in rows:
+        connection.execute(
+            identity.update()
+            .where(identity.c.id == row["id"])
+            .values(declared_metadata=_legacy_snapshot(row))
+        )
+
+
+def _legacy_values(value: object) -> dict[str, object]:
+    """从版本化快照恢复旧版可表达的三个固定声明字段。"""
+    if not isinstance(value, Mapping) or value.get("schema_version") != 1:
+        return {
+            "system_version": None,
+            "supports_v3": None,
+            "supports_v3t": None,
+        }
+    manifest = value.get("manifest")
+    runtime = value.get("runtime")
+    return {
+        "system_version": (
+            manifest.get("system_version")
+            if isinstance(manifest, Mapping)
+            and isinstance(manifest.get("system_version"), str)
+            else None
+        ),
+        "supports_v3": (
+            runtime.get("v3")
+            if isinstance(runtime, Mapping)
+            and isinstance(runtime.get("v3"), bool)
+            else None
+        ),
+        "supports_v3t": (
+            runtime.get("v3t")
+            if isinstance(runtime, Mapping)
+            and isinstance(runtime.get("v3t"), bool)
+            else None
+        ),
+    }
+
+
+def _restore_legacy_columns() -> None:
+    """在降级前把当前快照投影回旧版固定声明列。"""
+    identity = sa.table(
+        "pluginidentity",
+        sa.column("id", sa.Integer()),
+        sa.column("declared_metadata", sa.JSON(none_as_null=True)),
+        sa.column("system_version", sa.String()),
+        sa.column("supports_v3", sa.Boolean()),
+        sa.column("supports_v3t", sa.Boolean()),
+    )
+    connection = op.get_bind()
+    rows = connection.execute(
+        sa.select(identity.c.id, identity.c.declared_metadata)
+    ).mappings().all()
+    for row in rows:
+        connection.execute(
+            identity.update()
+            .where(identity.c.id == row["id"])
+            .values(**_legacy_values(row["declared_metadata"]))
+        )
+
+
+def upgrade() -> None:
+    """新增声明快照、离线回填并移除会随 package 扩张的固定列。"""
+    columns = _column_names()
+    if not columns:
+        return
+    legacy_columns = _LEGACY_COLUMNS & columns
+    if legacy_columns and legacy_columns != _LEGACY_COLUMNS:
+        raise RuntimeError("pluginidentity 旧声明字段不完整，拒绝继续迁移")
+    if "declared_metadata" not in columns:
+        op.add_column(
+            "pluginidentity",
+            sa.Column(
+                "declared_metadata",
+                sa.JSON(none_as_null=True),
+                nullable=True,
+            ),
+        )
+        columns.add("declared_metadata")
+    if _LEGACY_COLUMNS <= columns:
+        _backfill_declared_metadata()
+    if legacy_columns:
+        with op.batch_alter_table("pluginidentity") as batch_op:
+            for column_name in sorted(legacy_columns):
+                batch_op.drop_column(column_name)
+
+
+def downgrade() -> None:
+    """恢复旧版固定声明列，并删除版本化声明快照。"""
+    columns = _column_names()
+    if not columns or "declared_metadata" not in columns:
+        return
+    missing_legacy = _LEGACY_COLUMNS - columns
+    if missing_legacy:
+        with op.batch_alter_table("pluginidentity") as batch_op:
+            if "system_version" in missing_legacy:
+                batch_op.add_column(
+                    sa.Column("system_version", sa.String(length=128))
+                )
+            if "supports_v3" in missing_legacy:
+                batch_op.add_column(sa.Column("supports_v3", sa.Boolean()))
+            if "supports_v3t" in missing_legacy:
+                batch_op.add_column(sa.Column("supports_v3t", sa.Boolean()))
+    _restore_legacy_columns()
+    with op.batch_alter_table("pluginidentity") as batch_op:
+        batch_op.drop_column("declared_metadata")
diff --git a/tests/fixtures/architecture/dependency-baseline.json b/tests/fixtures/architecture/dependency-baseline.json
index 9b3c32bfb..e7c09aee8 100644
--- a/tests/fixtures/architecture/dependency-baseline.json
+++ b/tests/fixtures/architecture/dependency-baseline.json
@@ -13,8 +13,8 @@
     "runtime_to_db": [],
     "workflow_to_db": []
   },
-  "edge_count": 6773,
-  "edge_sha256": "3ba25180753ef7e15d9d08b7af25b66191306e8c0b465a27bed5613ed8d30c5d",
+  "edge_count": 6785,
+  "edge_sha256": "077e003bf195195e4e75dc65c9596e0b5a45c0e33441e3a22829f0cdb8d98e45",
   "edges": [
     "app -> app.runtime",
     "app -> app.runtime.compat",
@@ -2112,6 +2112,7 @@
     "app.api.endpoints.plugin -> app.application.commands",
     "app.api.endpoints.plugin -> app.application.configuration",
     "app.api.endpoints.plugin -> app.application.plugin",
+    "app.api.endpoints.plugin -> app.application.plugin.catalog",
     "app.api.endpoints.plugin -> app.application.plugin.config",
     "app.api.endpoints.plugin -> app.application.plugin.folders",
     "app.api.endpoints.plugin -> app.application.plugin.gateway",
@@ -2744,9 +2745,15 @@
     "app.application.outbox -> app.schemas.types",
     "app.application.plugin.admission -> app.application",
     "app.application.plugin.admission -> app.application.plugin",
+    "app.application.plugin.admission -> app.application.plugin.declaration",
     "app.application.plugin.admission -> app.application.plugin.identity",
     "app.application.plugin.admission -> app.application.plugin.inventory",
     "app.application.plugin.admission -> app.application.plugin.source",
+    "app.application.plugin.catalog -> app.application",
+    "app.application.plugin.catalog -> app.application.plugin",
+    "app.application.plugin.catalog -> app.application.plugin.identity",
+    "app.application.plugin.catalog -> app.schemas",
+    "app.application.plugin.catalog -> app.schemas.plugin",
     "app.application.plugin.config -> app.schemas",
     "app.application.plugin.config -> app.schemas.exception",
     "app.application.plugin.folders -> app.application",
@@ -2763,6 +2770,9 @@
     "app.application.plugin.gateway -> app.application.plugin.inventory",
     "app.application.plugin.gateway -> app.application.plugin.lifecycle",
     "app.application.plugin.gateway -> app.application.plugin.source",
+    "app.application.plugin.identity -> app.application",
+    "app.application.plugin.identity -> app.application.plugin",
+    "app.application.plugin.identity -> app.application.plugin.declaration",
     "app.application.plugin.identity_migration -> app.application",
     "app.application.plugin.identity_migration -> app.application.plugin",
     "app.application.plugin.identity_migration -> app.application.plugin.identity",
@@ -3666,6 +3676,7 @@
     "app.db.adapters.outbox -> app.db.models.outbox",
     "app.db.adapters.pluginidentity -> app.application",
     "app.db.adapters.pluginidentity -> app.application.plugin",
+    "app.db.adapters.pluginidentity -> app.application.plugin.declaration",
     "app.db.adapters.pluginidentity -> app.application.plugin.identity",
     "app.db.adapters.pluginidentity -> app.db",
     "app.db.adapters.pluginidentity -> app.db.models",
@@ -3675,6 +3686,7 @@
     "app.db.adapters.pluginidentity -> app.db.uow",
     "app.db.adapters.plugininstallation -> app.application",
     "app.db.adapters.plugininstallation -> app.application.plugin",
+    "app.db.adapters.plugininstallation -> app.application.plugin.declaration",
     "app.db.adapters.plugininstallation -> app.application.plugin.identity",
     "app.db.adapters.plugininstallation -> app.application.plugin.transaction",
     "app.db.adapters.plugininstallation -> app.db",
@@ -6790,7 +6802,7 @@
     "app.workflow.actions.transfer_file -> app.workflow",
     "app.workflow.actions.transfer_file -> app.workflow.actions"
   ],
-  "module_count": 833,
+  "module_count": 834,
   "modules": [
     "app",
     "app.adapters",
@@ -7085,6 +7097,7 @@
     "app.application.plugin.catalog",
     "app.application.plugin.config",
     "app.application.plugin.data",
+    "app.application.plugin.declaration",
     "app.application.plugin.folders",
     "app.application.plugin.gateway",
     "app.application.plugin.identity",
diff --git a/tests/test_plugin_declared_metadata.py b/tests/test_plugin_declared_metadata.py
new file mode 100644
index 000000000..4c845beec
--- /dev/null
+++ b/tests/test_plugin_declared_metadata.py
@@ -0,0 +1,207 @@
+"""插件 package 声明快照和值对象展示回退测试。"""
+
+from datetime import datetime, timezone
+
+import pytest
+
+from app.application.plugin.catalog import apply_declared_metadata_fallback
+from app.application.plugin.declaration import PluginDeclaredMetadata
+from app.application.plugin.identity import (
+    PluginBindingBasis,
+    PluginIdentity,
+    PluginPayloadSourceType,
+    TrustedPluginSourceType,
+)
+from app.schemas.plugin import Plugin, PluginRuntimeStatus
+
+NOW = datetime(2026, 8, 25, 12, 0, tzinfo=timezone.utc)
+OFFICIAL_SOURCE = "github:jxxghp/moviepilot-plugins"
+
+
+def _metadata(
+    package: dict[str, object],
+    *,
+    version: str = "1.0.0",
+    matches_payload: bool = True,
+) -> PluginDeclaredMetadata:
+    """构造一份可用于身份测试的 package 声明快照。"""
+    return PluginDeclaredMetadata.from_package(
+        package,
+        declaration_version=version,
+        manifest_matches_payload=matches_payload,
+    )
+
+
+def _identity(
+    metadata: PluginDeclaredMetadata,
+    *,
+    version: str = "1.0.0",
+    plugin_id: str = "DemoPlugin",
+) -> PluginIdentity:
+    """构造带已提交声明快照的官方在线身份。"""
+    return PluginIdentity(
+        plugin_id=plugin_id,
+        normalized_plugin_id=plugin_id.lower(),
+        trusted_source_type=TrustedPluginSourceType.OFFICIAL,
+        trusted_source_key=OFFICIAL_SOURCE,
+        binding_basis=PluginBindingBasis.OFFICIAL_DEFAULT,
+        payload_source_type=PluginPayloadSourceType.OFFICIAL,
+        payload_source_key=OFFICIAL_SOURCE,
+        declared_version=version,
+        package_generation="v3",
+        declared_metadata=metadata,
+        payload_receipt="sha256:" + "0" * 64,
+        revision=1,
+        created_at=NOW,
+        updated_at=NOW,
+        bound_at=NOW,
+        payload_applied_at=NOW,
+    )
+
+
+def test_declared_metadata_round_trips_package_and_storage_without_extra_fields() -> None:
+    """package 声明保存后应可稳定往返，并丢弃未纳入合同的字段。"""
+    package = {
+        "name": "Demo",
+        "description": "A demo plugin",
+        "icon": "demo.svg",
+        "author": "MoviePilot",
+        "system_version": ">=3.0.0",
+        "labels": "alpha, beta",
+        "level": 2,
+        "release": True,
+        "v4": True,
+        "v4t": False,
+        "unknown_field": "ignored",
+        "repo_url": "https://github.com/attacker/repo",
+        "source": "github:attacker/repo",
+        "token": "secret",
+        "plugin_public_key": "public-key",
+    }
+
+    snapshot = _metadata(package, version="2.0.0")
+    restored = PluginDeclaredMetadata.from_storage(snapshot.to_json())
+    stored = restored.to_json()
+
+    assert restored == snapshot
+    assert restored.declaration_version == "2.0.0"
+    assert restored.manifest_matches_payload is True
+    assert restored.runtime_support("v4") is True
+    assert restored.runtime_support("v4t") is False
+    assert stored["manifest"] == {
+        "author": "MoviePilot",
+        "description": "A demo plugin",
+        "icon": "demo.svg",
+        "labels": ["alpha", "beta"],
+        "level": 2,
+        "name": "Demo",
+        "release": True,
+        "system_version": ">=3.0.0",
+    }
+    assert stored["runtime"] == {"v4": True, "v4t": False}
+    assert "unknown_field" not in str(stored)
+    assert "attacker" not in str(stored)
+    assert "secret" not in str(stored)
+    assert "public-key" not in str(stored)
+
+
+def test_declared_metadata_preserves_system_version_storage_limit() -> None:
+    """系统版本声明继续遵守旧数据库列的长度合同，保证迁移可降级。"""
+    with pytest.raises(ValueError, match="长度不能超过 128"):
+        _metadata({"system_version": "v" * 129})
+
+
+def test_declared_metadata_ignores_unknown_runtime_shapes_and_is_deep_copied() -> None:
+    """未知代际和外部可变对象不能污染已提交快照。"""
+    labels = ["alpha"]
+    package = {
+        "name": "Demo",
+        "labels": labels,
+        "v4": True,
+        "v4t": False,
+        "v5": "not-a-bool",
+        "vX": True,
+    }
+    snapshot = _metadata(package)
+    labels.append("mutated-after-build")
+    exported = snapshot.to_json()
+    exported["manifest"]["labels"].append("mutated-export")
+
+    assert snapshot.to_json()["manifest"]["labels"] == ["alpha"]
+    assert snapshot.runtime_support("v4") is True
+    assert snapshot.runtime_support("v4t") is False
+    assert snapshot.runtime_support("v5") is None
+
+
+def test_declared_metadata_records_current_and_historical_release_truth() -> None:
+    """当前 package 与历史 Release 的声明对应关系必须可区分。"""
+    current = _metadata({"name": "Demo", "v3": True}, version="2.0.0")
+    historical = _metadata(
+        {"name": "Demo", "v3": True},
+        version="1.0.0",
+        matches_payload=False,
+    )
+
+    assert current.manifest_matches_payload is True
+    assert historical.manifest_matches_payload is False
+    assert historical.declaration_version == "1.0.0"
+
+
+def test_declared_metadata_fallback_is_batch_safe_and_preserves_runtime_fields() -> None:
+    """批量展示回退只补空展示字段，不覆盖运行态或另一插件身份。"""
+    first = _identity(
+        _metadata(
+            {
+                "name": "Demo from snapshot",
+                "description": "Saved description",
+                "icon": "saved.svg",
+                "author": "Saved author",
+                "labels": ["saved", "plugin"],
+            },
+            version="2.0.0",
+        ),
+        version="2.0.0",
+        plugin_id="DemoPlugin",
+    )
+    second = _identity(
+        _metadata({"name": "Other from snapshot"}, version="3.0.0"),
+        version="3.0.0",
+        plugin_id="OtherPlugin",
+    )
+    plugins = [
+        Plugin(
+            id="DemoPlugin",
+            plugin_name="DemoPlugin",
+            plugin_version=None,
+            runtime_status=PluginRuntimeStatus.LOAD_FAILED,
+            state=True,
+            plugin_desc=None,
+        ),
+        Plugin(
+            id="OtherPlugin",
+            plugin_name="Runtime name",
+            plugin_desc="Runtime description",
+            plugin_version="loaded-version",
+            runtime_status=PluginRuntimeStatus.READY,
+        ),
+        Plugin(id="MissingPlugin", plugin_name="MissingPlugin"),
+    ]
+
+    result = apply_declared_metadata_fallback(
+        plugins,
+        {"demoplugin": first, "otherplugin": second},
+    )
+
+    assert result[0].plugin_name == "Demo from snapshot"
+    assert result[0].plugin_desc == "Saved description"
+    assert result[0].plugin_icon == "saved.svg"
+    assert result[0].plugin_author == "Saved author"
+    assert result[0].plugin_version == "2.0.0"
+    assert result[0].plugin_label == "saved,plugin"
+    assert result[0].runtime_status is PluginRuntimeStatus.LOAD_FAILED
+    assert result[0].state is True
+    assert result[1].plugin_name == "Runtime name"
+    assert result[1].plugin_desc == "Runtime description"
+    assert result[1].plugin_version == "loaded-version"
+    assert result[1].runtime_status is PluginRuntimeStatus.READY
+    assert result[2].plugin_name == "MissingPlugin"
diff --git a/tests/test_plugin_endpoint.py b/tests/test_plugin_endpoint.py
index c0b91f162..2aafde1e1 100644
--- a/tests/test_plugin_endpoint.py
+++ b/tests/test_plugin_endpoint.py
@@ -1,18 +1,29 @@
 import asyncio
 from contextlib import nullcontext
-from unittest.mock import ANY, AsyncMock, MagicMock, patch
+from datetime import datetime, timezone
+from unittest.mock import AsyncMock, MagicMock, patch
 
-from app.api.endpoints import plugin as plugin_endpoint
 from app import schemas
-from app.api.endpoints.plugin import plugin_history
-from app.api.endpoints.plugin import plugin_releases
-from app.api.endpoints.plugin import reset_plugin
-from app.api.endpoints.plugin import reload_plugin
-from app.api.endpoints.plugin import runtime_status
-from app.api.endpoints.plugin import plugin_static_file
-from app.api.endpoints.plugin import uninstall_plugin
+from app.api.endpoints import plugin as plugin_endpoint
+from app.api.endpoints.plugin import (
+    plugin_history,
+    plugin_releases,
+    plugin_static_file,
+    reload_plugin,
+    reset_plugin,
+    runtime_status,
+    uninstall_plugin,
+)
 from app.api.endpoints.system import sync_plugin_market_from_wiki
 from app.application.plugin.config import PluginConfigCommand
+from app.application.plugin.declaration import PluginDeclaredMetadata
+from app.application.plugin.identity import (
+    PluginBindingBasis,
+    PluginIdentity,
+    PluginPayloadSourceType,
+    TrustedPluginSourceType,
+)
+from app.foundation.singleton import Singleton
 from app.runtime.config import settings
 from app.runtime.extensions.plugin.admission import PluginMutationAdmission
 from app.runtime.extensions.plugin_manager import PluginManager
@@ -20,7 +31,47 @@ from app.runtime.tasks import TaskRegistry
 from app.schemas.event import PluginDataResetEventData
 from app.schemas.plugin import PluginInstance, PluginRuntimeStatus
 from app.schemas.types import ChainEventType, SystemConfigKey
-from app.foundation.singleton import Singleton
+
+NOW = datetime(2026, 8, 26, 12, 0, tzinfo=timezone.utc)
+SOURCE_KEY = "github:demo/plugins"
+SOURCE_URL = "https://github.com/demo/plugins"
+
+
+def _plugin_identity(
+    *,
+    metadata: PluginDeclaredMetadata | None = None,
+) -> PluginIdentity:
+    """构造绑定到测试仓库的插件身份。"""
+    has_payload = metadata is not None
+    return PluginIdentity(
+        plugin_id="DemoPlugin",
+        normalized_plugin_id="demoplugin",
+        trusted_source_type=TrustedPluginSourceType.THIRD_PARTY,
+        trusted_source_key=SOURCE_KEY,
+        binding_basis=PluginBindingBasis.EXPLICIT_INSTALL,
+        payload_source_type=(
+            PluginPayloadSourceType.THIRD_PARTY
+            if has_payload
+            else PluginPayloadSourceType.UNKNOWN
+        ),
+        payload_source_key=SOURCE_KEY if has_payload else None,
+        declared_version="1.0.0" if has_payload else None,
+        package_generation="v3" if has_payload else None,
+        declared_metadata=metadata,
+        payload_receipt="sha256:" + "0" * 64 if has_payload else None,
+        revision=1,
+        created_at=NOW,
+        updated_at=NOW,
+        bound_at=NOW,
+        payload_applied_at=NOW if has_payload else None,
+    )
+
+
+def _persistence(identity: PluginIdentity) -> MagicMock:
+    """构造只暴露身份读取合同的异步持久化替身。"""
+    persistence = MagicMock()
+    persistence.get_identity = AsyncMock(return_value=identity)
+    return persistence
 
 
 def test_plugin_history_merges_remote_metadata():
@@ -36,24 +87,31 @@ def test_plugin_history_merges_remote_metadata():
     )
     market_plugin = schemas.Plugin(
         id="DemoPlugin",
-        repo_url="https://github.com/demo/plugins",
+        repo_url=SOURCE_URL,
         history={"v1.1.0": "- 新增更新说明"},
         system_version=">=2.0.0",
         system_version_compatible=True,
         has_update=True,
     )
     plugin_manager = MagicMock()
-    plugin_manager.get_local_plugins.return_value = [installed_plugin]
+    plugin_manager.get_installed_plugins.return_value = [installed_plugin]
     plugin_manager.get_local_repo_plugins.return_value = []
-    plugin_manager.async_get_online_plugins = AsyncMock(return_value=[market_plugin])
+    plugin_manager.async_get_plugins_from_market = AsyncMock(return_value=[market_plugin])
+    persistence = _persistence(_plugin_identity())
 
-    with patch("app.api.endpoints.plugin.get_plugin_manager", return_value=plugin_manager):
+    with (
+        patch("app.api.endpoints.plugin.get_plugin_manager", return_value=plugin_manager),
+        patch("app.api.endpoints.plugin.get_plugin_persistence", return_value=persistence),
+    ):
         result = asyncio.run(plugin_history("DemoPlugin", None, True))
 
     assert result.repo_url == "https://github.com/demo/plugins"
     assert result.history == {"v1.1.0": "- 新增更新说明"}
     assert result.system_version == ">=2.0.0"
     assert result.has_update
+    plugin_manager.async_get_plugins_from_market.assert_awaited_once_with(
+        SOURCE_URL, settings.VERSION_FLAG, True
+    )
 
 
 def test_runtime_status_reports_pending_and_terminal_counts():
@@ -103,49 +161,94 @@ def test_plugin_history_returns_installed_plugin_when_remote_missing():
         installed=True,
     )
     plugin_manager = MagicMock()
-    plugin_manager.get_local_plugins.return_value = [installed_plugin]
+    plugin_manager.get_installed_plugins.return_value = [installed_plugin]
     plugin_manager.get_local_repo_plugins.return_value = []
-    plugin_manager.async_get_online_plugins = AsyncMock(return_value=[])
+    plugin_manager.async_get_plugins_from_market = AsyncMock(return_value=[])
+    persistence = _persistence(_plugin_identity())
 
-    with patch("app.api.endpoints.plugin.get_plugin_manager", return_value=plugin_manager):
+    with (
+        patch("app.api.endpoints.plugin.get_plugin_manager", return_value=plugin_manager),
+        patch("app.api.endpoints.plugin.get_plugin_persistence", return_value=persistence),
+    ):
         result = asyncio.run(plugin_history("DemoPlugin", None, True))
 
     assert result.id == "DemoPlugin"
     assert result.history == {}
 
 
-def test_plugin_history_uses_installed_repo_without_refreshing_all_markets():
+def test_plugin_history_uses_bound_repo_without_refreshing_all_markets():
     """
-    已安装插件记录了来源仓库时，更新说明只刷新该仓库，避免弹窗触发全市场慢刷新。
+    更新说明只读取持久化绑定仓库，不信任运行态 DTO 中可漂移的来源地址。
     """
     installed_plugin = schemas.Plugin(
         id="DemoPlugin",
         plugin_name="Demo Plugin",
         plugin_version="1.0.0",
-        repo_url="https://github.com/demo/plugins",
+        repo_url="https://github.com/attacker/plugins",
         installed=True,
     )
     market_plugin = schemas.Plugin(
         id="DemoPlugin",
-        repo_url="https://github.com/demo/plugins",
+        repo_url=SOURCE_URL,
         history={"v1.1.0": "- 新增更新说明"},
     )
     plugin_manager = MagicMock()
-    plugin_manager.get_local_plugins.return_value = [installed_plugin]
+    plugin_manager.get_installed_plugins.return_value = [installed_plugin]
     plugin_manager.get_local_repo_plugins.return_value = []
     plugin_manager.async_get_plugins_from_market = AsyncMock(return_value=[market_plugin])
     plugin_manager.async_get_online_plugins = AsyncMock(return_value=[])
+    persistence = _persistence(_plugin_identity())
 
-    with patch("app.api.endpoints.plugin.get_plugin_manager", return_value=plugin_manager):
+    with (
+        patch("app.api.endpoints.plugin.get_plugin_manager", return_value=plugin_manager),
+        patch("app.api.endpoints.plugin.get_plugin_persistence", return_value=persistence),
+    ):
         result = asyncio.run(plugin_history("DemoPlugin", None, True))
 
     assert result.history == {"v1.1.0": "- 新增更新说明"}
     plugin_manager.async_get_plugins_from_market.assert_awaited_once_with(
-        "https://github.com/demo/plugins", settings.VERSION_FLAG, True
+        SOURCE_URL, settings.VERSION_FLAG, True
     )
     plugin_manager.async_get_online_plugins.assert_not_awaited()
 
 
+def test_plugin_history_uses_declared_metadata_when_bound_market_is_unavailable():
+    """加载失败且绑定市场不可用时，详情仍返回已提交载荷的展示信息。"""
+    installed_plugin = schemas.Plugin(
+        id="DemoPlugin",
+        plugin_name="DemoPlugin",
+        installed=True,
+        runtime_status=PluginRuntimeStatus.LOAD_FAILED,
+    )
+    metadata = PluginDeclaredMetadata.from_package(
+        {
+            "name": "Saved Demo",
+            "description": "Saved description",
+            "author": "Saved author",
+            "v3": True,
+        },
+        declaration_version="1.0.0",
+        manifest_matches_payload=True,
+    )
+    plugin_manager = MagicMock()
+    plugin_manager.get_installed_plugins.return_value = [installed_plugin]
+    plugin_manager.get_local_repo_plugins.return_value = []
+    plugin_manager.async_get_plugins_from_market = AsyncMock(return_value=[])
+    persistence = _persistence(_plugin_identity(metadata=metadata))
+
+    with (
+        patch("app.api.endpoints.plugin.get_plugin_manager", return_value=plugin_manager),
+        patch("app.api.endpoints.plugin.get_plugin_persistence", return_value=persistence),
+    ):
+        result = asyncio.run(plugin_history("DemoPlugin", None, True))
+
+    assert result.plugin_name == "Saved Demo"
+    assert result.plugin_desc == "Saved description"
+    assert result.plugin_author == "Saved author"
+    assert result.plugin_version == "1.0.0"
+    assert result.runtime_status is PluginRuntimeStatus.LOAD_FAILED
+
+
 def test_plugin_releases_returns_supported_versions_with_latest_and_current(monkeypatch):
     """
     release 列表接口返回可安装版本，并标记当前 package 最新版本与本地已安装版本。
diff --git a/tests/test_plugin_identity.py b/tests/test_plugin_identity.py
index 4f2fd73c3..dde043bfc 100644
--- a/tests/test_plugin_identity.py
+++ b/tests/test_plugin_identity.py
@@ -9,6 +9,7 @@ import pytest
 import sqlalchemy as sa
 from sqlalchemy.orm import sessionmaker
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -34,6 +35,7 @@ def _identity(
     declared_version: str | None = None,
 ) -> PluginIdentity:
     """构造一份已从官方仓成功安装的物理插件身份。"""
+    installed_version = declared_version or "1.0.0"
     return PluginIdentity(
         plugin_id=plugin_id,
         normalized_plugin_id=plugin_id.lower(),
@@ -42,11 +44,19 @@ def _identity(
         binding_basis=PluginBindingBasis.OFFICIAL_DEFAULT,
         payload_source_type=PluginPayloadSourceType.OFFICIAL,
         payload_source_key=OFFICIAL_SOURCE,
-        declared_version=declared_version or "1.0.0",
+        declared_version=installed_version,
         package_generation="v3",
-        system_version=None,
-        supports_v3=None,
-        supports_v3t=None,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {
+                "name": "Demo",
+                "description": "Demo plugin",
+                "v3": True,
+                "v3t": False,
+                "release": True,
+            },
+            declaration_version=installed_version,
+            manifest_matches_payload=True,
+        ),
         payload_receipt="sha256:" + "0" * 64,
         revision=1,
         created_at=NOW,
@@ -197,9 +207,15 @@ def test_local_payload_preserves_trusted_online_binding() -> None:
         payload_source_key=None,
         declared_version="2.0.0-dev",
         package_generation="v3",
-        system_version=">=3.0.0",
-        supports_v3=True,
-        supports_v3t=False,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {
+                "name": "Demo local",
+                "v3": True,
+                "v3t": False,
+            },
+            declaration_version="2.0.0-dev",
+            manifest_matches_payload=True,
+        ),
         payload_receipt="sha256:" + "a" * 64,
         payload_applied_at=NOW + timedelta(seconds=1),
         updated_at=NOW + timedelta(seconds=1),
@@ -321,7 +337,6 @@ def test_plugin_identity_rejects_noncanonical_physical_id(plugin_id) -> None:
     ("field_name", "value", "message"),
     (
         ("declared_version", "v" * 65, "插件声明版本"),
-        ("system_version", ">" * 129, "插件系统版本要求"),
     ),
 )
 def test_plugin_identity_rejects_values_longer_than_database_columns(
diff --git a/tests/test_plugin_identity_migration.py b/tests/test_plugin_identity_migration.py
index d01b944ac..dcbdc9ebc 100644
--- a/tests/test_plugin_identity_migration.py
+++ b/tests/test_plugin_identity_migration.py
@@ -22,12 +22,18 @@ except ModuleNotFoundError:
 
 from app.db.models.pluginidentity import PluginIdentity
 
-MIGRATION = "database.versions.d2e4f6a8b0c1_3_0_9"
+BASE_MIGRATION = "database.versions.d2e4f6a8b0c1_3_0_9"
+INSTALLATION_MIGRATION = "database.versions.e4f7a1b2c3d5_3_0_10"
+DECLARATION_MIGRATION = "database.versions.5f2a9c1e7b4d_3_0_12"
 
 
-def _bind_migration(monkeypatch, connection):
+def _bind_migration(
+    monkeypatch,
+    connection,
+    module_name: str = BASE_MIGRATION,
+):
     """把迁移绑定到隔离数据库连接。"""
-    migration = importlib.import_module(MIGRATION)
+    migration = importlib.import_module(module_name)
     context = MigrationContext.configure(connection)
     monkeypatch.setattr(migration, "op", Operations(context))
     return migration
@@ -36,13 +42,27 @@ def _bind_migration(monkeypatch, connection):
 def test_plugin_identity_migration_upgrades_twice_and_downgrades(
     monkeypatch,
 ) -> None:
-    """旧 SQLite schema 应可重复升级并完整删除 dormant 身份表。"""
+    """SQLite 应可从旧身份表升级到声明快照并按逆序完整回滚。"""
     engine = sa.create_engine("sqlite://")
     with engine.begin() as connection:
         migration = _bind_migration(monkeypatch, connection)
 
         migration.upgrade()
         migration.upgrade()
+        installation = _bind_migration(
+            monkeypatch,
+            connection,
+            INSTALLATION_MIGRATION,
+        )
+        installation.upgrade()
+        installation.upgrade()
+        declaration = _bind_migration(
+            monkeypatch,
+            connection,
+            DECLARATION_MIGRATION,
+        )
+        declaration.upgrade()
+        declaration.upgrade()
 
         inspector = sa.inspect(connection)
         assert "pluginidentity" in inspector.get_table_names()
@@ -65,9 +85,23 @@ def test_plugin_identity_migration_upgrades_twice_and_downgrades(
             "ck_pluginidentity_normalized_plugin_id",
             "ck_pluginidentity_revision",
         }
+        assert "plugininstallation" in inspector.get_table_names()
 
+        declaration.downgrade()
+        installation.downgrade()
         migration.downgrade()
-        assert "pluginidentity" not in sa.inspect(connection).get_table_names()
+        assert not {
+            "pluginidentity",
+            "plugininstallation",
+        } & set(sa.inspect(connection).get_table_names())
+
+        migration.upgrade()
+        installation.upgrade()
+        declaration.upgrade()
+        assert {
+            column["name"]
+            for column in sa.inspect(connection).get_columns("pluginidentity")
+        } == {column.name for column in PluginIdentity.__table__.columns}
 
 
 def test_plugin_identity_migration_accepts_fresh_current_schema(monkeypatch) -> None:
@@ -75,7 +109,11 @@ def test_plugin_identity_migration_accepts_fresh_current_schema(monkeypatch) ->
     engine = sa.create_engine("sqlite://")
     with engine.begin() as connection:
         PluginIdentity.__table__.create(connection)
-        migration = _bind_migration(monkeypatch, connection)
+        migration = _bind_migration(
+            monkeypatch,
+            connection,
+            DECLARATION_MIGRATION,
+        )
 
         migration.upgrade()
         migration.upgrade()
@@ -86,9 +124,126 @@ def test_plugin_identity_migration_accepts_fresh_current_schema(monkeypatch) ->
         } == {column.name for column in PluginIdentity.__table__.columns}
 
 
+def test_plugin_identity_declaration_migration_backfills_and_restores_legacy_fields(
+    monkeypatch,
+) -> None:
+    """声明迁移应保守回填旧字段，并能在降级时恢复旧投影。"""
+    engine = sa.create_engine("sqlite://")
+    with engine.begin() as connection:
+        base = _bind_migration(monkeypatch, connection)
+        base.upgrade()
+        table = sa.Table(
+            "pluginidentity",
+            sa.MetaData(),
+            autoload_with=connection,
+        )
+        connection.execute(
+            table.insert().values(
+                plugin_id="DemoPlugin",
+                normalized_plugin_id="demoplugin",
+                trusted_source_type="official",
+                trusted_source_key="github:jxxghp/moviepilot-plugins",
+                binding_basis="official_default",
+                payload_source_type="official",
+                payload_source_key="github:jxxghp/moviepilot-plugins",
+                declared_version="1.0.0",
+                package_generation="v3",
+                system_version=">=3.0.0",
+                supports_v3=True,
+                supports_v3t=False,
+                payload_receipt="sha256:" + "0" * 64,
+                revision=1,
+                created_at="2026-08-25T12:00:00+00:00",
+                updated_at="2026-08-25T12:00:00+00:00",
+                bound_at="2026-08-25T12:00:00+00:00",
+                payload_applied_at="2026-08-25T12:00:00+00:00",
+            )
+        )
+        unknown_id = connection.execute(
+            table.insert().values(
+                plugin_id="UnknownPlugin",
+                normalized_plugin_id="unknownplugin",
+                trusted_source_type="unknown",
+                binding_basis="legacy_unbound",
+                payload_source_type="unknown",
+                revision=1,
+                created_at="2026-08-25T12:00:00+00:00",
+                updated_at="2026-08-25T12:00:00+00:00",
+            ).returning(table.c.id)
+        ).scalar_one()
+
+        declaration = _bind_migration(
+            monkeypatch,
+            connection,
+            DECLARATION_MIGRATION,
+        )
+        declaration.upgrade()
+        current = sa.Table(
+            "pluginidentity",
+            sa.MetaData(),
+            autoload_with=connection,
+        )
+        row = connection.execute(
+            sa.select(current).where(current.c.plugin_id == "DemoPlugin")
+        ).mappings().one()
+        assert row["declared_metadata"] == {
+            "schema_version": 1,
+            "declaration_version": None,
+            "manifest_matches_payload": False,
+            "manifest": {"system_version": ">=3.0.0"},
+            "runtime": {"v3": True, "v3t": False},
+        }
+        assert connection.execute(
+            sa.select(current.c.id).where(current.c.declared_metadata.is_(None))
+        ).scalars().all() == [unknown_id]
+
+        declaration.downgrade()
+        restored = sa.Table(
+            "pluginidentity",
+            sa.MetaData(),
+            autoload_with=connection,
+        )
+        restored_row = connection.execute(
+            sa.select(restored).where(restored.c.plugin_id == "DemoPlugin")
+        ).mappings().one()
+        assert restored_row["system_version"] == ">=3.0.0"
+        assert restored_row["supports_v3"] is True
+        assert restored_row["supports_v3t"] is False
+        assert "declared_metadata" not in restored.c
+
+
+def test_plugin_identity_declaration_migration_rejects_partial_legacy_schema(
+    monkeypatch,
+) -> None:
+    """非 canonical 旧字段集合必须停止迁移，不能静默丢弃残余声明。"""
+    engine = sa.create_engine("sqlite://")
+    with engine.begin() as connection:
+        base = _bind_migration(monkeypatch, connection)
+        base.upgrade()
+        with Operations(MigrationContext.configure(connection)).batch_alter_table(
+            "pluginidentity"
+        ) as batch_op:
+            batch_op.drop_column("supports_v3t")
+
+        declaration = _bind_migration(
+            monkeypatch,
+            connection,
+            DECLARATION_MIGRATION,
+        )
+        with pytest.raises(RuntimeError, match="旧声明字段不完整"):
+            declaration.upgrade()
+
+        columns = {
+            column["name"]
+            for column in sa.inspect(connection).get_columns("pluginidentity")
+        }
+        assert "declared_metadata" not in columns
+        assert {"system_version", "supports_v3"} <= columns
+
+
 def test_plugin_identity_migration_matches_postgresql_identity() -> None:
     """独立 Alembic 路径应保留 PostgreSQL 循环 Identity 主键。"""
-    migration = importlib.import_module(MIGRATION)
+    migration = importlib.import_module(BASE_MIGRATION)
     metadata = sa.MetaData()
     table = sa.Table(
         "pluginidentity",
@@ -148,25 +303,80 @@ def test_plugin_identity_migration_runs_on_postgresql(monkeypatch) -> None:
             migration = _bind_migration(monkeypatch, connection)
             migration.upgrade()
             migration.upgrade()
-
-            table = sa.Table(
+            installation = _bind_migration(
+                monkeypatch,
+                connection,
+                INSTALLATION_MIGRATION,
+            )
+            installation.upgrade()
+            legacy_table = sa.Table(
                 "pluginidentity",
                 sa.MetaData(),
                 autoload_with=connection,
             )
             inserted_id = connection.execute(
-                table.insert().values(
+                legacy_table.insert().values(
                     plugin_id="DemoPlugin",
                     normalized_plugin_id="demoplugin",
+                    trusted_source_type="official",
+                    trusted_source_key="github:jxxghp/moviepilot-plugins",
+                    binding_basis="official_default",
+                    payload_source_type="official",
+                    payload_source_key="github:jxxghp/moviepilot-plugins",
+                    declared_version="1.0.0",
+                    package_generation="v3",
+                    system_version=">=3.0.0",
+                    supports_v3=True,
+                    supports_v3t=False,
+                    payload_receipt="sha256:" + "0" * 64,
+                    revision=1,
+                    created_at="2026-08-25T12:00:00+00:00",
+                    updated_at="2026-08-25T12:00:00+00:00",
+                    bound_at="2026-08-25T12:00:00+00:00",
+                    payload_applied_at="2026-08-25T12:00:00+00:00",
+                ).returning(legacy_table.c.id)
+            ).scalar_one()
+            assert inserted_id == 1
+            unknown_id = connection.execute(
+                legacy_table.insert().values(
+                    plugin_id="UnknownPlugin",
+                    normalized_plugin_id="unknownplugin",
                     trusted_source_type="unknown",
                     binding_basis="legacy_unbound",
                     payload_source_type="unknown",
                     revision=1,
                     created_at="2026-08-25T12:00:00+00:00",
                     updated_at="2026-08-25T12:00:00+00:00",
-                ).returning(table.c.id)
+                ).returning(legacy_table.c.id)
             ).scalar_one()
-            assert inserted_id == 1
+            assert unknown_id == 2
+            declaration = _bind_migration(
+                monkeypatch,
+                connection,
+                DECLARATION_MIGRATION,
+            )
+            declaration.upgrade()
+            declaration.upgrade()
+
+            table = sa.Table(
+                "pluginidentity",
+                sa.MetaData(),
+                autoload_with=connection,
+            )
+            row = connection.execute(
+                sa.select(table).where(table.c.id == inserted_id)
+            ).mappings().one()
+            assert row["declared_metadata"] == {
+                "schema_version": 1,
+                "declaration_version": None,
+                "manifest_matches_payload": False,
+                "manifest": {"system_version": ">=3.0.0"},
+                "runtime": {"v3": True, "v3t": False},
+            }
+            unknown_row = connection.execute(
+                sa.select(table).where(table.c.id == unknown_id)
+            ).mappings().one()
+            assert unknown_row["declared_metadata"] is None
 
             with pytest.raises(sa.exc.IntegrityError):
                 with connection.begin_nested():
@@ -183,6 +393,35 @@ def test_plugin_identity_migration_runs_on_postgresql(monkeypatch) -> None:
                         )
                     )
 
+            declaration.downgrade()
+            restored = sa.Table(
+                "pluginidentity",
+                sa.MetaData(),
+                autoload_with=connection,
+            )
+            restored_row = connection.execute(
+                sa.select(restored).where(restored.c.id == inserted_id)
+            ).mappings().one()
+            assert restored_row["system_version"] == ">=3.0.0"
+            assert restored_row["supports_v3"] is True
+            assert restored_row["supports_v3t"] is False
+
+            declaration.upgrade()
+            reupgraded = sa.Table(
+                "pluginidentity",
+                sa.MetaData(),
+                autoload_with=connection,
+            )
+            reupgraded_row = connection.execute(
+                sa.select(reupgraded).where(reupgraded.c.id == inserted_id)
+            ).mappings().one()
+            assert reupgraded_row["declared_metadata"]["runtime"] == {
+                "v3": True,
+                "v3t": False,
+            }
+
+            declaration.downgrade()
+            installation.downgrade()
             migration.downgrade()
             assert "pluginidentity" not in sa.inspect(connection).get_table_names()
     finally:
diff --git a/tests/test_plugin_identity_startup_migration.py b/tests/test_plugin_identity_startup_migration.py
index da405d36c..7fbd72f12 100644
--- a/tests/test_plugin_identity_startup_migration.py
+++ b/tests/test_plugin_identity_startup_migration.py
@@ -10,6 +10,7 @@ from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -34,6 +35,15 @@ THIRD_PARTY_REPO = "https://github.com/example/MoviePilot-Plugins"
 THIRD_PARTY_SOURCE = "github:example/moviepilot-plugins"
 
 
+def _metadata(version: str, *, matches_payload: bool = True) -> PluginDeclaredMetadata:
+    """构造测试用 package 声明快照。"""
+    return PluginDeclaredMetadata.from_package(
+        {"name": "Demo", "v3": True, "v3t": False},
+        declaration_version=version,
+        manifest_matches_payload=matches_payload,
+    )
+
+
 class _Persistence:
     """提供可观察 CAS 竞争的内存迁移持久化端口。"""
 
@@ -140,9 +150,7 @@ def _legacy(plugin_id: str = "DemoPlugin") -> PluginIdentity:
         payload_source_key=None,
         declared_version=None,
         package_generation=None,
-        system_version=None,
-        supports_v3=None,
-        supports_v3t=None,
+        declared_metadata=None,
         payload_receipt=None,
         revision=1,
         created_at=NOW,
@@ -356,6 +364,7 @@ async def test_migration_does_not_replace_existing_bound_or_local_identity() ->
         payload_source_type=PluginPayloadSourceType.LOCAL,
         declared_version="1.0.0-dev",
         package_generation="v3",
+        declared_metadata=_metadata("1.0.0-dev"),
         payload_receipt="sha256:" + "1" * 64,
         payload_applied_at=NOW,
     )
@@ -399,6 +408,7 @@ async def test_collect_online_restore_plugins_requires_trust_and_local_payload()
         payload_source_type=PluginPayloadSourceType.LOCAL,
         declared_version="9.9.10",
         package_generation="v3",
+        declared_metadata=_metadata("9.9.10"),
         payload_receipt="sha256:" + "2" * 64,
         bound_at=NOW,
         payload_applied_at=NOW,
@@ -409,6 +419,7 @@ async def test_collect_online_restore_plugins_requires_trust_and_local_payload()
         payload_source_type=PluginPayloadSourceType.LOCAL,
         declared_version="1.0.0-dev",
         package_generation="v3",
+        declared_metadata=_metadata("1.0.0-dev"),
         payload_receipt="sha256:" + "3" * 64,
         payload_applied_at=NOW,
     )
@@ -421,6 +432,7 @@ async def test_collect_online_restore_plugins_requires_trust_and_local_payload()
         payload_source_key=OFFICIAL_SOURCE,
         declared_version="1.2.0",
         package_generation="v3",
+        declared_metadata=_metadata("1.2.0"),
         payload_receipt="sha256:" + "4" * 64,
         bound_at=NOW,
         payload_applied_at=NOW,
@@ -470,6 +482,7 @@ async def test_sync_runs_identity_migration_before_automatic_install(
         payload_source_type=PluginPayloadSourceType.LOCAL,
         declared_version="9.9.10",
         package_generation="v3",
+        declared_metadata=_metadata("9.9.10"),
         payload_receipt="sha256:" + "5" * 64,
         bound_at=NOW,
         payload_applied_at=NOW,
diff --git a/tests/test_plugin_identity_transitions.py b/tests/test_plugin_identity_transitions.py
index 9770dcff1..76721f622 100644
--- a/tests/test_plugin_identity_transitions.py
+++ b/tests/test_plugin_identity_transitions.py
@@ -7,6 +7,7 @@ import pytest
 import sqlalchemy as sa
 from sqlalchemy.orm import sessionmaker
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -23,6 +24,15 @@ OFFICIAL_SOURCE = "github:jxxghp/moviepilot-plugins"
 THIRD_PARTY_SOURCE = "github:example/moviepilot-plugins"
 
 
+def _metadata(version: str, *, matches_payload: bool = True) -> PluginDeclaredMetadata:
+    """构造测试用 package 声明快照。"""
+    return PluginDeclaredMetadata.from_package(
+        {"name": "Demo", "v3": True, "v3t": False},
+        declaration_version=version,
+        manifest_matches_payload=matches_payload,
+    )
+
+
 def _identity(
     plugin_id: str = "DemoPlugin",
     *,
@@ -43,9 +53,13 @@ def _identity(
         payload_source_key=payload_source_key,
         declared_version="1.0.0",
         package_generation="v3",
-        system_version=None,
-        supports_v3=None,
-        supports_v3t=None,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo", "v3": True, "v3t": False},
+            declaration_version="1.0.0",
+            manifest_matches_payload=True,
+        )
+        if payload_source_type is not PluginPayloadSourceType.UNKNOWN
+        else None,
         payload_receipt="sha256:" + "0" * 64,
         revision=1,
         created_at=NOW,
@@ -95,9 +109,7 @@ def _legacy_identity(plugin_id: str = "DemoPlugin") -> PluginIdentity:
         payload_source_key=None,
         declared_version=None,
         package_generation=None,
-        system_version=None,
-        supports_v3=None,
-        supports_v3t=None,
+        declared_metadata=None,
         payload_receipt=None,
         revision=1,
         created_at=NOW,
@@ -124,6 +136,7 @@ def _online_binding_target(
         payload_source_key=source_key,
         declared_version="2.0.0",
         package_generation="v3",
+        declared_metadata=_metadata("2.0.0"),
         payload_receipt="sha256:" + "2" * 64,
         updated_at=updated_at,
         bound_at=updated_at,
@@ -214,6 +227,7 @@ def test_bind_local_commits_only_legacy_unbound_transition(identity_store) -> No
         payload_source_type=PluginPayloadSourceType.LOCAL,
         declared_version="2.0.0-dev",
         package_generation="v3",
+        declared_metadata=_metadata("2.0.0-dev"),
         payload_receipt="sha256:" + "1" * 64,
         updated_at=NOW + timedelta(seconds=1),
         payload_applied_at=NOW + timedelta(seconds=1),
@@ -249,6 +263,7 @@ def test_bind_online_commits_legacy_and_local_first_bindings(identity_store) ->
         payload_source_type=PluginPayloadSourceType.LOCAL,
         declared_version="2.0.0-dev",
         package_generation="v3",
+        declared_metadata=_metadata("2.0.0-dev"),
         payload_receipt="sha256:" + "1" * 64,
         updated_at=NOW + timedelta(seconds=1),
         payload_applied_at=NOW + timedelta(seconds=1),
@@ -302,6 +317,7 @@ def test_first_local_install_still_uses_ordinary_create(identity_store) -> None:
         payload_source_type=PluginPayloadSourceType.LOCAL,
         payload_source_key=None,
         declared_version="2.0.0-dev",
+        declared_metadata=_metadata("2.0.0-dev"),
         payload_receipt="sha256:" + "1" * 64,
         bound_at=None,
     )
@@ -325,6 +341,7 @@ def test_bind_local_rejects_nonlegacy_state_and_stale_revision(identity_store) -
         payload_source_key=None,
         bound_at=None,
         declared_version="2.0.0-dev",
+        declared_metadata=_metadata("2.0.0-dev"),
         payload_receipt="sha256:" + "1" * 64,
         updated_at=NOW + timedelta(seconds=1),
         payload_applied_at=NOW + timedelta(seconds=1),
@@ -341,6 +358,7 @@ def test_bind_local_rejects_nonlegacy_state_and_stale_revision(identity_store) -
         payload_source_key=None,
         declared_version=None,
         package_generation=None,
+        declared_metadata=None,
         payload_receipt=None,
         bound_at=None,
         payload_applied_at=None,
@@ -352,6 +370,7 @@ def test_bind_local_rejects_nonlegacy_state_and_stale_revision(identity_store) -
         payload_source_type=PluginPayloadSourceType.LOCAL,
         declared_version="2.0.0-dev",
         package_generation="v3",
+        declared_metadata=_metadata("2.0.0-dev"),
         payload_receipt="sha256:" + "1" * 64,
         updated_at=NOW + timedelta(seconds=1),
         payload_applied_at=NOW + timedelta(seconds=1),
diff --git a/tests/test_plugin_install_admission.py b/tests/test_plugin_install_admission.py
index 236809c82..989ea822c 100644
--- a/tests/test_plugin_install_admission.py
+++ b/tests/test_plugin_install_admission.py
@@ -10,6 +10,7 @@ from app.application.plugin.admission import (
     PluginSourceAdmissionError,
     admit_plugin_install,
 )
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -58,9 +59,11 @@ def _identity() -> PluginIdentity:
         payload_source_key=OFFICIAL,
         declared_version="1.0.0",
         package_generation="v3",
-        system_version=None,
-        supports_v3=True,
-        supports_v3t=None,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo", "v3": True, "v3t": False},
+            declaration_version="1.0.0",
+            manifest_matches_payload=True,
+        ),
         payload_receipt="sha256:" + "0" * 64,
         revision=3,
         created_at=NOW,
@@ -104,6 +107,55 @@ def test_same_source_update_preserves_binding_and_advances_payload() -> None:
     assert target.declared_version == "2.0.0"
 
 
+def test_current_release_marks_declaration_as_matching_payload() -> None:
+    """按当前 package 版本安装时，声明快照应标记为对应当前载荷。"""
+    admission = admit_plugin_install(
+        _inventory(_online_candidate()),
+        request=PluginInstallAdmissionRequest(
+            plugin_id="DemoPlugin",
+            generations=("v3", "v2", "v1"),
+            requested_repo_url="https://github.com/jxxghp/MoviePilot-Plugins",
+        ),
+        identity=None,
+        now=NOW,
+    )
+
+    target = admission.build_identity(
+        payload_receipt="sha256:" + "7" * 64,
+        applied_at=NOW,
+    )
+
+    assert target.declared_metadata is not None
+    assert target.declared_metadata.declaration_version == "2.0.0"
+    assert target.declared_metadata.manifest_matches_payload is True
+
+
+def test_historical_release_marks_declaration_as_not_matching_payload() -> None:
+    """安装历史 Release 时必须保留其声明版本，并标记与当前载荷不对应。"""
+    admission = admit_plugin_install(
+        _inventory(_online_candidate()),
+        request=PluginInstallAdmissionRequest(
+            plugin_id="DemoPlugin",
+            generations=("v3", "v2", "v1"),
+            requested_repo_url="https://github.com/jxxghp/MoviePilot-Plugins",
+        ),
+        identity=None,
+        now=NOW,
+    )
+
+    target = admission.build_identity(
+        payload_receipt="sha256:" + "8" * 64,
+        applied_at=NOW,
+        declared_version="1.0.0",
+        manifest_matches_payload=False,
+    )
+
+    assert target.declared_version == "1.0.0"
+    assert target.declared_metadata is not None
+    assert target.declared_metadata.declaration_version == "2.0.0"
+    assert target.declared_metadata.manifest_matches_payload is False
+
+
 def test_first_online_binding_uses_payload_commit_time() -> None:
     """首次在线绑定在载荷提交时生效，不能早于身份创建时间。"""
     applied_at = NOW + timedelta(seconds=1)
@@ -315,7 +367,7 @@ def test_legacy_identity_can_bind_explicit_online_source() -> None:
         payload_source_key=None,
         declared_version=None,
         package_generation=None,
-        supports_v3=None,
+        declared_metadata=None,
         payload_receipt=None,
         bound_at=None,
         payload_applied_at=None,
diff --git a/tests/test_plugin_install_command.py b/tests/test_plugin_install_command.py
index 8168ce630..62f62c970 100644
--- a/tests/test_plugin_install_command.py
+++ b/tests/test_plugin_install_command.py
@@ -14,6 +14,7 @@ from app.application.plugin.admission import (
     PluginInstallAdmissionRequest,
     admit_plugin_install,
 )
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -56,9 +57,11 @@ def _identity(*, version: str = "1.0.0", revision: int = 1) -> PluginIdentity:
         payload_source_key=SOURCE_KEY,
         declared_version=version,
         package_generation="v3",
-        system_version=None,
-        supports_v3=True,
-        supports_v3t=False,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo", "v3": True, "v3t": False},
+            declaration_version=version,
+            manifest_matches_payload=True,
+        ),
         payload_receipt=RECEIPT,
         revision=revision,
         created_at=NOW,
@@ -197,6 +200,8 @@ class _PersistenceSpy:
         self.calls.append("journal_commit")
         if self.commit_error:
             raise self.commit_error
+        if identity_target is not None:
+            self.identity = identity_target
         record = self.records[transaction_id]
         record = replace(
             record,
@@ -624,6 +629,33 @@ async def test_precommit_failure_restores_files_and_runtime(
         rollback_reloader.assert_not_awaited()
 
 
+@pytest.mark.asyncio
+async def test_precommit_failure_keeps_previous_declared_metadata_snapshot():
+    """提交前失败不得把新声明快照写成当前身份事实。"""
+    previous = _identity(version="1.0.0", revision=3)
+    persistence = _PersistenceSpy([], identity=previous)
+    rollback_reloader = AsyncMock()
+    target_reloader = AsyncMock(side_effect=RuntimeError("reload failed"))
+    command, _, _ = _command(
+        persistence=persistence,
+        target_reloader=target_reloader,
+        rollback_reloader=rollback_reloader,
+    )
+
+    result = await _execute(
+        command,
+        admission=_admission(identity=previous),
+    )
+
+    assert result.success is False
+    assert result.failure_stage == "runtime_reload"
+    assert result.rollback.journal_deleted is True
+    assert persistence.identity is previous
+    assert persistence.identity.declared_version == "1.0.0"
+    assert persistence.identity.declared_metadata is previous.declared_metadata
+    rollback_reloader.assert_awaited_once_with("DemoPlugin")
+
+
 @pytest.mark.asyncio
 async def test_database_commit_failure_restores_runtime_before_deleting_journal():
     """数据库最终提交失败时，文件、运行态和 PREPARED journal 必须一起补偿。"""
diff --git a/tests/test_plugin_install_gateway.py b/tests/test_plugin_install_gateway.py
index b2b25548e..6e5429a56 100644
--- a/tests/test_plugin_install_gateway.py
+++ b/tests/test_plugin_install_gateway.py
@@ -5,6 +5,7 @@ from unittest.mock import AsyncMock, Mock
 
 import pytest
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.gateway import PluginInstallGateway
 from app.application.plugin.identity import (
     PluginBindingBasis,
@@ -141,9 +142,11 @@ async def test_gateway_checks_compatibility_on_final_trusted_candidate() -> None
         payload_source_key=None,
         declared_version="9.9.9",
         package_generation="v3",
-        system_version=None,
-        supports_v3=True,
-        supports_v3t=None,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo local", "v3": True},
+            declaration_version="9.9.9",
+            manifest_matches_payload=True,
+        ),
         payload_receipt="sha256:" + "1" * 64,
         revision=3,
         created_at=NOW,
@@ -253,9 +256,11 @@ async def test_gateway_forwards_explicit_source_change_revision() -> None:
         payload_source_key="github:jxxghp/moviepilot-plugins",
         declared_version="1.0.0",
         package_generation="v3",
-        system_version=None,
-        supports_v3=True,
-        supports_v3t=None,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo", "v3": True},
+            declaration_version="1.0.0",
+            manifest_matches_payload=True,
+        ),
         payload_receipt="sha256:" + "0" * 64,
         revision=4,
         created_at=NOW,
diff --git a/tests/test_plugin_install_transaction.py b/tests/test_plugin_install_transaction.py
index aab7ad22a..3ecd9e9ea 100644
--- a/tests/test_plugin_install_transaction.py
+++ b/tests/test_plugin_install_transaction.py
@@ -26,6 +26,7 @@ except ModuleNotFoundError:
 
     POSTGRESQL_DIALECT = "postgresql+psycopg"
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -63,9 +64,11 @@ def _identity(
         payload_source_key="github:jxxghp/moviepilot-plugins",
         declared_version=version,
         package_generation="v3",
-        system_version=None,
-        supports_v3=True,
-        supports_v3t=False,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo", "v3": True, "v3t": False},
+            declaration_version=version,
+            manifest_matches_payload=True,
+        ),
         payload_receipt="sha256:" + "0" * 64,
         revision=revision,
         created_at=NOW,
@@ -238,8 +241,11 @@ def _identity_model(identity: PluginIdentity) -> PluginIdentityModel:
         payload_source_key=identity.payload_source_key,
         declared_version=identity.declared_version,
         package_generation=identity.package_generation,
-        supports_v3=identity.supports_v3,
-        supports_v3t=identity.supports_v3t,
+        declared_metadata=(
+            identity.declared_metadata.to_json()
+            if identity.declared_metadata is not None
+            else None
+        ),
         payload_receipt=identity.payload_receipt,
         revision=identity.revision,
         created_at=identity.created_at.isoformat(),
@@ -610,6 +616,10 @@ def postgresql_installation_stores():
             connection,
             "database.versions.e4f7a1b2c3d5_3_0_10",
         )
+        _upgrade_migration(
+            connection,
+            "database.versions.5f2a9c1e7b4d_3_0_12",
+        )
     factory = sessionmaker(bind=engine, expire_on_commit=False)
     _set_config(factory, [])
     first = TransactionalPluginInstallationStore(
diff --git a/tests/test_plugin_installation_recovery.py b/tests/test_plugin_installation_recovery.py
index acd2ebd09..31d0652a1 100644
--- a/tests/test_plugin_installation_recovery.py
+++ b/tests/test_plugin_installation_recovery.py
@@ -7,6 +7,7 @@ from unittest.mock import AsyncMock, Mock
 
 import pytest
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.identity import (
     PluginBindingBasis,
     PluginIdentity,
@@ -38,9 +39,11 @@ def _identity(*, revision: int = 2, receipt: str = RECEIPT) -> PluginIdentity:
         payload_source_key="github:jxxghp/moviepilot-plugins",
         declared_version="2.0.0",
         package_generation="v3",
-        system_version=None,
-        supports_v3=True,
-        supports_v3t=True,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo", "v3": True, "v3t": True},
+            declaration_version="2.0.0",
+            manifest_matches_payload=True,
+        ),
         payload_receipt=receipt,
         revision=revision,
         created_at=NOW,
diff --git a/tests/test_plugin_source_policy.py b/tests/test_plugin_source_policy.py
index c7ee9faa7..97b56da11 100644
--- a/tests/test_plugin_source_policy.py
+++ b/tests/test_plugin_source_policy.py
@@ -64,9 +64,7 @@ def _identity(source_type: TrustedPluginSourceType, source_key: str) -> PluginId
         payload_source_key=None,
         declared_version=None,
         package_generation=None,
-        system_version=None,
-        supports_v3=None,
-        supports_v3t=None,
+        declared_metadata=None,
         payload_receipt=None,
         revision=1,
         created_at=now,
diff --git a/tests/test_plugin_sync_service.py b/tests/test_plugin_sync_service.py
index df40cbb89..6e91c57ff 100644
--- a/tests/test_plugin_sync_service.py
+++ b/tests/test_plugin_sync_service.py
@@ -7,6 +7,7 @@ from unittest.mock import AsyncMock, Mock
 
 import pytest
 
+from app.application.plugin.declaration import PluginDeclaredMetadata
 from app.application.plugin.gateway import PluginInstallGateway
 from app.application.plugin.identity import (
     PluginBindingBasis,
@@ -165,9 +166,11 @@ async def test_market_sync_reuses_startup_lease_through_real_gateway(
         payload_source_key=None,
         declared_version="9.9.10",
         package_generation="v3",
-        system_version=None,
-        supports_v3=True,
-        supports_v3t=None,
+        declared_metadata=PluginDeclaredMetadata.from_package(
+            {"name": "Demo local", "v3": True},
+            declaration_version="9.9.10",
+            manifest_matches_payload=True,
+        ),
         payload_receipt="sha256:" + "0" * 64,
         revision=1,
         created_at=datetime(2026, 8, 25, 12, 0, tzinfo=timezone.utc),