feat: multi-package loading with base framework support

- Add RuntimeOptions.basePackages for loading framework packages before game package
- Add ScriptEngine.loadPackages() for multi-package module merging
- LuaDardoScriptEngine merges modules from all packages, game overrides framework
- PackageActivationController loads base packages first, then game package
- GamePackageManifest parses optional 'base' field
- Update docs: README, quick-start, lua-package-format, architecture
- Update all test mocks with loadPackages() implementation

README.md

@@ -19,6 +19,7 @@ It is designed for Flutter apps that want to host Lua-authored 2D games or inter
 - Runtime commands for movement, fading, scaling, rotation, sequencing, audio, resources, toast, clipboard, and Spine animation.
 - Shared Lua helper modules under `assets/runtime/lua/`.
 - Configurable Runtime Lua asset root via `RuntimeOptions.runtimeLuaRoot`.
+- Multi-package loading: shared framework packages loaded once, game packages loaded on top.
 
 ## Example
 
@@ -59,6 +60,18 @@ LuaGameWidget(
 )
 ```
 
+With a shared framework package:
+
+```dart
+LuaGameWidget(
+  gameId: 'ludo',
+  runtimeOptions: const RuntimeOptions(
+    runtimeLuaRoot: 'packages/flame_lua_runtime/assets/runtime/lua',
+    basePackages: ['_framework'],
+  ),
+)
+```
+
 Your app should provide game package assets such as:
 
 ```text
@@ -105,7 +118,7 @@ For AI agents and maintainers, start with:
 - [`AGENTS.md`](AGENTS.md) — package boundaries, rules, public API, and validation commands.
 - [`docs/quick-start.md`](docs/quick-start.md) — host app integration.
 - [`docs/architecture.md`](docs/architecture.md) — Dart/Lua/Flame responsibilities.
-- [`docs/lua-package-format.md`](docs/lua-package-format.md) — manifest and Lua package rules.
+- [`docs/lua-package-format.md`](docs/lua-package-format.md) — manifest, Lua package rules, and multi-package loading.
 - [`docs/protocol.md`](docs/protocol.md) — RuntimeEvent, GameDiff, RuntimeNode, RuntimeCommand boundary.
 - [`docs/validation.md`](docs/validation.md) — checks, smoke tests, and release flow.
 

docs/architecture.md

@@ -68,6 +68,28 @@ Package dependency root:
 packages/flame_lua_runtime/assets/runtime/lua
 ```
 
+### Multi-package loading
+
+The runtime supports loading multiple packages in sequence, with module merging:
+
+```text
+RuntimeOptions.basePackages = ['_framework']
+  -> load _framework package (modules: app, diff, ids, net, ...)
+  -> load game package (modules: state, rules, main, ...)
+  -> merge into flat _moduleScripts map
+  -> game modules override framework modules on name collision
+  -> execute game entry script
+```
+
+Key classes:
+
+- `RuntimeOptions.basePackages` — ordered list of framework package IDs.
+- `PackageActivationController._prepareCandidate()` — loads base packages first, then game package, passes combined list to `ScriptEngine.loadPackages()`.
+- `LuaDardoScriptEngine.loadPackages()` — iterates all packages, merges `manifest.modules` into `_moduleScripts`, executes entry from last package.
+- `GamePackageManifest.base` — optional metadata field declaring framework dependency.
+
+Module resolution is flat: `runtime.import("xxx")` looks up `_moduleScripts[xxx]`. Game modules and framework modules share the same namespace. Later-loaded packages win on collision.
+
 ## Safety model
 
 - Lua module loading is manifest-declared.

docs/lua-package-format.md

@@ -64,6 +64,53 @@ runtime:*.lua
 
 `runtime:` paths must not contain `/`, `..`, or an empty filename.
 
+## Base packages
+
+A game manifest can declare a `base` field to indicate it depends on a framework package:
+
+```json
+{
+  "gameId": "ludo",
+  "base": "_framework",
+  "modules": { ... }
+}
+```
+
+The `base` field is metadata. Actual loading is controlled by `RuntimeOptions.basePackages`:
+
+```dart
+LuaGameWidget(
+  gameId: 'ludo',
+  runtimeOptions: const RuntimeOptions(
+    basePackages: ['_framework'],
+  ),
+)
+```
+
+Loading order:
+
+1. Base packages are loaded first, in `basePackages` order.
+2. The game package is loaded last.
+3. All modules are merged into a flat map.
+4. Later packages override earlier packages on name collision.
+5. The entry script always comes from the last (game) package.
+
+This means a game can override any framework module by declaring a module with the same name in its own manifest.
+
+## Multi-package module resolution
+
+When Lua code calls `runtime.import("xxx")`:
+
+1. Look up `xxx` in the merged module map (game modules first, then framework).
+2. If not found, throw `FormatException: Lua module is not declared in manifest.modules`.
+
+Framework modules are transparent to game code:
+
+```lua
+local app = runtime.import("app")       -- resolved from framework
+local state = runtime.import("state")   -- resolved from game
+```
+
 ## Entry module
 
 The manifest `entry` module should expose lifecycle/event functions expected by the script engine. Keep game-specific state in Lua modules and return runtime diffs/commands through the approved protocol.

docs/quick-start.md

@@ -98,3 +98,77 @@ flutter run --dart-define=LUA_GAME_ID=flight
   }
 }
 ```
+
+## Multi-package loading (base + game)
+
+When multiple games share common modules (event router, diff utilities, panel stack, network layer), extract them into a framework package and load it before the game package.
+
+Framework package structure:
+
+```text
+assets/games/_framework/
+  manifest.json
+  scripts/
+    app.lua
+    diff.lua
+    event_router.lua
+    ids.lua
+    net.lua
+    panel_stack.lua
+```
+
+Framework manifest:
+
+```json
+{
+  "gameId": "_framework",
+  "name": "Lua Game Framework",
+  "version": "1.0.0",
+  "runtimeApiVersion": 1,
+  "entry": "scripts/app.lua",
+  "assetsBase": "assets",
+  "modules": {
+    "app": "scripts/app.lua",
+    "diff": "scripts/diff.lua",
+    "event_router": "scripts/event_router.lua",
+    "ids": "scripts/ids.lua",
+    "net": "scripts/net.lua",
+    "panel_stack": "scripts/panel_stack.lua"
+  }
+}
+```
+
+Game manifest (no framework modules needed):
+
+```json
+{
+  "gameId": "ludo",
+  "base": "_framework",
+  "modules": {
+    "state": "scripts/state.lua",
+    "rules": "scripts/rules.lua",
+    "main": "scripts/main.lua"
+  }
+}
+```
+
+Game code imports framework modules transparently:
+
+```lua
+local app = runtime.import("app")       -- from framework
+local state = runtime.import("state")   -- from game
+```
+
+Embed with base packages:
+
+```dart
+LuaGameWidget(
+  gameId: 'ludo',
+  runtimeOptions: const RuntimeOptions(
+    runtimeLuaRoot: 'packages/flame_lua_runtime/assets/runtime/lua',
+    basePackages: ['_framework'],
+  ),
+)
+```
+
+Module resolution order: game package modules override framework modules with the same name. The entry script always comes from the last package (game package).

lib/runtime/game/flame_lua_game.dart

@@ -148,6 +148,7 @@ class FlameLuaGame extends FlameGame with PanDetector, ScrollDetector {
             resources: _createResourceManager(),
             scriptEngine: _bootstrapScriptEngine,
             audio: _createAudioManager(),
+            runtimeOptions: runtimeOptions,
             resourceManagerFactory: _createResourceManager,
             audioManagerFactory: _createAudioManager,
             scriptEngineFactory: _scriptEngineFactory,

lib/runtime/game/runtime_options.dart

@@ -1,7 +1,14 @@
 class RuntimeOptions {
-  const RuntimeOptions({this.runtimeLuaRoot = defaultRuntimeLuaRoot});
+  const RuntimeOptions({
+    this.runtimeLuaRoot = defaultRuntimeLuaRoot,
+    this.basePackages = const [],
+  });
 
   static const defaultRuntimeLuaRoot = 'assets/runtime/lua';
 
   final String runtimeLuaRoot;
+
+  // 框架包 gameId 列表，按顺序先于游戏包加载。
+  // 后加载的同名模块覆盖先加载的。
+  final List<String> basePackages;
 }

lib/runtime/packages/game_package_activation_controller.dart

@@ -1,4 +1,5 @@
 import '../audio/runtime_audio_manager.dart';
+import '../game/runtime_options.dart';
 import '../models/game_diff.dart';
 import '../resources/game_resource_manager.dart';
 import '../scripting/runtime_script_services.dart';
@@ -15,6 +16,7 @@ class PackageActivationController {
     required this.scriptEngine,
     this.audio,
     this.runtimeApiVersion = 1,
+    this.runtimeOptions = const RuntimeOptions(),
     this.store = const StablePackageStore(),
     this.assetFallback = const AssetGamePackageRepository(),
     this.resourceManagerFactory,
@@ -28,6 +30,7 @@ class PackageActivationController {
   final ScriptEngine scriptEngine;
   final RuntimeAudioManager? audio;
   final int runtimeApiVersion;
+  final RuntimeOptions runtimeOptions;
   final StablePackageStore store;
   final GamePackageRepository assetFallback;
   final GameResourceManager Function()? resourceManagerFactory;
@@ -143,12 +146,34 @@ class PackageActivationController {
     try {
       await verifier.verify(candidate);
       _ensureContinue(shouldContinue);
+
+      // 加载 base packages（框架包），按 runtimeOptions.basePackages 顺序。
+      final basePackages = <GamePackage>[];
+      for (final baseId in runtimeOptions.basePackages) {
+        final baseCandidates = await _candidatePackages(
+          baseId,
+          shouldContinue,
+        );
+        for (final baseCandidate in baseCandidates) {
+          try {
+            await verifier.verify(baseCandidate);
+            basePackages.add(baseCandidate);
+            break;
+          } catch (_) {
+            // Try next candidate.
+          }
+        }
+      }
+
       await preparedResources.mount(candidate);
       _ensureContinue(shouldContinue);
       await preparedAudio?.mount(candidate);
       _ensureContinue(shouldContinue);
-      await preparedScriptEngine.loadPackage(
+
-        candidate,
+      // 合并 base + game 包，传给脚本引擎。
+      final allPackages = [...basePackages, candidate];
+      await preparedScriptEngine.loadPackages(
+        allPackages,
         services: scriptServices,
       );
       _ensureContinue(shouldContinue);

lib/runtime/packages/game_package_manifest.dart

@@ -15,6 +15,7 @@ class GamePackageManifest {
     this.display = const GameDisplayConfig(),
     this.resources = const {},
     this.modules = const {},
+    this.base,
   });
 
   final String gameId;
@@ -29,6 +30,9 @@ class GamePackageManifest {
   final Map<String, GameResource> resources;
   final Map<String, String> modules;
 
+  /// 依赖的框架包 gameId。加载时会先加载框架包，再加载游戏包。
+  final String? base;
+
   static GamePackageManifest fromJsonString(String source) {
     return fromMap(jsonDecode(source) as Map<String, Object?>);
   }
@@ -58,6 +62,8 @@ class GamePackageManifest {
       }
     }
 
+    final base = map['base'] as String?;
+
     final defaultLocale = (map['defaultLocale'] as String?) ?? 'en';
     final supportedLocales = _stringList(
       map,
@@ -89,6 +95,7 @@ class GamePackageManifest {
       display: display,
       resources: resources,
       modules: modules,
+      base: base,
     );
   }
 

lib/runtime/scripting/lua_dardo_script_engine.dart

@@ -27,15 +27,34 @@ class LuaDardoScriptEngine implements ScriptEngine {
   Future<void> loadPackage(
     GamePackage package, {
     RuntimeScriptServices services = const RuntimeScriptServices(),
+  }) {
+    return loadPackages([package], services: services);
+  }
+
+  @override
+  Future<void> loadPackages(
+    List<GamePackage> packages, {
+    RuntimeScriptServices services = const RuntimeScriptServices(),
   }) async {
+    if (packages.isEmpty) {
+      throw const FormatException('loadPackages requires at least one package');
+    }
+
     _services = services;
     _networkRequestCounter = 0;
     _hostCallCounter = 0;
-    final script = await package.readText(package.manifest.entry);
     _moduleScripts = {};
-    for (final entry in package.manifest.modules.entries) {
+
-      _moduleScripts[entry.key] = await package.readText(entry.value);
+    // 按顺序加载所有包的模块，后加载的同名模块覆盖先加载的。
+    for (final package in packages) {
+      for (final entry in package.manifest.modules.entries) {
+        _moduleScripts[entry.key] = await package.readText(entry.value);
+      }
     }
+
+    // 入口脚本使用最后一个包（游戏包）。
+    final entryPackage = packages.last;
+    final script = await entryPackage.readText(entryPackage.manifest.entry);
     _loadingModules.clear();
 
     _lua = LuaState.newState();

lib/runtime/scripting/script_engine.dart

@@ -4,11 +4,19 @@ import '../packages/game_package.dart';
 import 'runtime_script_services.dart';
 
 abstract interface class ScriptEngine {
+  // 加载单个包（向后兼容，内部调 loadPackages([package])）。
   Future<void> loadPackage(
     GamePackage package, {
     RuntimeScriptServices services = const RuntimeScriptServices(),
   });
 
+  // 加载多个包，按顺序合并模块，后加载的同名模块覆盖先加载的。
+  // 入口脚本使用最后一个包。
+  Future<void> loadPackages(
+    List<GamePackage> packages, {
+    RuntimeScriptServices services = const RuntimeScriptServices(),
+  });
+
   bool smokeTest(Map<String, Object?> context);
 
   GameDiff init(Map<String, Object?> context);

test/runtime/events/runtime_event_dispatcher_test.dart

@@ -156,6 +156,12 @@ class _FakeScriptEngine implements ScriptEngine {
     RuntimeScriptServices services = const RuntimeScriptServices(),
   }) async {}
 
+  @override
+  Future<void> loadPackages(
+    List<GamePackage> packages, {
+    RuntimeScriptServices services = const RuntimeScriptServices(),
+  }) async {}
+
   @override
   bool smokeTest(Map<String, Object?> context) => true;
 

test/runtime/game/flame_lua_game_test.dart

@@ -44,6 +44,14 @@ class _FakeScriptEngine implements ScriptEngine {
     throw UnimplementedError();
   }
 
+  @override
+  Future<void> loadPackages(
+    List<GamePackage> packages, {
+    RuntimeScriptServices services = const RuntimeScriptServices(),
+  }) {
+    throw UnimplementedError();
+  }
+
   @override
   GameDiff dispatchEvent(RuntimeEvent event) {
     throw UnimplementedError();

test/runtime/packages/game_package_activation_controller_test.dart

@@ -366,6 +366,17 @@ class _FakeScriptEngine implements ScriptEngine {
     loadedPackages.add(package.rootPath);
   }
 
+  @override
+  Future<void> loadPackages(
+    List<GamePackage> packages, {
+    RuntimeScriptServices services = const RuntimeScriptServices(),
+  }) async {
+    for (final package in packages) {
+      _package = package;
+      loadedPackages.add(package.rootPath);
+    }
+  }
+
   @override
   bool smokeTest(Map<String, Object?> context) {
     return !smokeFailures.contains(_package?.rootPath);