diff --git a/pkgs/code_assets/doc/schema/hook/shared_definitions.generated.schema.json b/pkgs/code_assets/doc/schema/hook/shared_definitions.generated.schema.json
index 8c4d7eaba..868774917 100644
--- a/pkgs/code_assets/doc/schema/hook/shared_definitions.generated.schema.json
+++ b/pkgs/code_assets/doc/schema/hook/shared_definitions.generated.schema.json
@@ -13,6 +13,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/BuildInput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/BuildInput"
         }
       ]
     },
@@ -26,6 +29,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/BuildOutput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/BuildOutput"
         }
       ]
     },
@@ -36,6 +42,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/HookInput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/HookInput"
         }
       ]
     },
@@ -46,6 +55,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/HookOutput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/HookOutput"
         }
       ]
     },
@@ -59,6 +71,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/LinkInput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/LinkInput"
         }
       ]
     },
@@ -72,6 +87,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/LinkOutput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/LinkOutput"
         }
       ]
     }
diff --git a/pkgs/code_assets/doc/schema/hook/shared_definitions.schema.json b/pkgs/code_assets/doc/schema/hook/shared_definitions.schema.json
new file mode 100644
index 000000000..032ada0fc
--- /dev/null
+++ b/pkgs/code_assets/doc/schema/hook/shared_definitions.schema.json
@@ -0,0 +1,23 @@
+{
+  "$schema": "https://json-schema.org/draft-07/schema#",
+  "title": "package:code_assets party:sdk shared definitions",
+  "definitions": {
+    "BuildInput": {},
+    "BuildOutput": {},
+    "HookInput": {
+      "properties": {
+        "config": {
+          "properties": {
+            "code": {
+              "$comment": "Future SDKs will no longer provide 'code', 'extensions.code_config' instead.",
+              "deprecated": true
+            }
+          }
+        }
+      }
+    },
+    "HookOutput": {},
+    "LinkInput": {},
+    "LinkOutput": {}
+  }
+}
diff --git a/pkgs/code_assets/doc/schema/sdk/shared_definitions.generated.schema.json b/pkgs/code_assets/doc/schema/sdk/shared_definitions.generated.schema.json
index ec815925f..8c66c9091 100644
--- a/pkgs/code_assets/doc/schema/sdk/shared_definitions.generated.schema.json
+++ b/pkgs/code_assets/doc/schema/sdk/shared_definitions.generated.schema.json
@@ -13,6 +13,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/BuildInput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/BuildInput"
         }
       ]
     },
@@ -26,6 +29,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/BuildOutput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/BuildOutput"
         }
       ]
     },
@@ -36,6 +42,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/HookInput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/HookInput"
         }
       ]
     },
@@ -46,6 +55,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/HookOutput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/HookOutput"
         }
       ]
     },
@@ -59,6 +71,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/LinkInput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/LinkInput"
         }
       ]
     },
@@ -72,6 +87,9 @@
         },
         {
           "$ref": "../shared/shared_definitions.generated.schema.json#/definitions/LinkOutput"
+        },
+        {
+          "$ref": "shared_definitions.schema.json#/definitions/LinkOutput"
         }
       ]
     }
diff --git a/pkgs/code_assets/doc/schema/sdk/shared_definitions.schema.json b/pkgs/code_assets/doc/schema/sdk/shared_definitions.schema.json
new file mode 100644
index 000000000..229524230
--- /dev/null
+++ b/pkgs/code_assets/doc/schema/sdk/shared_definitions.schema.json
@@ -0,0 +1,22 @@
+{
+  "$schema": "https://json-schema.org/draft-07/schema#",
+  "title": "package:code_assets party:sdk shared definitions",
+  "definitions": {
+    "BuildInput": {},
+    "BuildOutput": {},
+    "HookInput": {
+      "properties": {
+        "config": {
+          "properties": {
+            "code": {
+              "$comment": "Old hooks still read 'code' so provide both 'code' and 'extensions.code_config'."
+            }
+          }
+        }
+      }
+    },
+    "HookOutput": {},
+    "LinkInput": {},
+    "LinkOutput": {}
+  }
+}
diff --git a/pkgs/code_assets/doc/schema/shared/shared_definitions.schema.json b/pkgs/code_assets/doc/schema/shared/shared_definitions.schema.json
index e461b49d4..11a332bce 100644
--- a/pkgs/code_assets/doc/schema/shared/shared_definitions.schema.json
+++ b/pkgs/code_assets/doc/schema/shared/shared_definitions.schema.json
@@ -255,6 +255,17 @@
       "properties": {
         "code": {
           "$ref": "#/definitions/CodeConfig"
+        },
+        "extensions": {
+          "$ref": "#/definitions/ConfigExtensions"
+        }
+      }
+    },
+    "ConfigExtensions": {
+      "type": "object",
+      "properties": {
+        "code_assets": {
+          "$ref": "#/definitions/CodeConfig"
         }
       }
     },
diff --git a/pkgs/code_assets/test/data/build_input_android.json b/pkgs/code_assets/test/data/build_input_android.json
index 232caf701..7b14b3a95 100644
--- a/pkgs/code_assets/test/data/build_input_android.json
+++ b/pkgs/code_assets/test/data/build_input_android.json
@@ -17,6 +17,21 @@
       "target_architecture": "arm",
       "target_os": "android"
     },
+    "extensions": {
+      "code_assets": {
+        "android": {
+          "target_ndk_api": 21
+        },
+        "c_compiler": {
+          "ar": "/Users/dacoharkes/Library/Android/sdk/ndk/28.0.12674087/toolchains/llvm/prebuilt/darwin-x86_64/bin/llvm-ar",
+          "cc": "/Users/dacoharkes/Library/Android/sdk/ndk/28.0.12674087/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang",
+          "ld": "/Users/dacoharkes/Library/Android/sdk/ndk/28.0.12674087/toolchains/llvm/prebuilt/darwin-x86_64/bin/ld.lld"
+        },
+        "link_mode_preference": "dynamic",
+        "target_architecture": "arm",
+        "target_os": "android"
+      }
+    },
     "linking_enabled": true
   },
   "out_dir": "/Users/dacoharkes/src/dacoharkes/playground/my_package/example/.dart_tool/native_assets_builder/my_package/c540d75d10834674921701cd6c3c7c15/out/",
diff --git a/pkgs/code_assets/test/data/build_input_ios.json b/pkgs/code_assets/test/data/build_input_ios.json
index dd42f33fa..fcc32022f 100644
--- a/pkgs/code_assets/test/data/build_input_ios.json
+++ b/pkgs/code_assets/test/data/build_input_ios.json
@@ -18,6 +18,22 @@
       "target_architecture": "arm64",
       "target_os": "ios"
     },
+    "extensions": {
+      "code_assets": {
+        "c_compiler": {
+          "ar": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar",
+          "cc": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang",
+          "ld": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld"
+        },
+        "ios": {
+          "target_sdk": "iphonesimulator",
+          "target_version": 12
+        },
+        "link_mode_preference": "dynamic",
+        "target_architecture": "arm64",
+        "target_os": "ios"
+      }
+    },
     "linking_enabled": false
   },
   "out_dir": "/Users/dacoharkes/src/dacoharkes/playground/my_package/example/.dart_tool/native_assets_builder/my_package/51d66b45a7c440edc44bf124509a5dda/out/",
diff --git a/pkgs/code_assets/test/data/build_input_linux.json b/pkgs/code_assets/test/data/build_input_linux.json
index 3e2114801..a99e49bf3 100644
--- a/pkgs/code_assets/test/data/build_input_linux.json
+++ b/pkgs/code_assets/test/data/build_input_linux.json
@@ -14,6 +14,18 @@
       "target_architecture": "x64",
       "target_os": "linux"
     },
+    "extensions": {
+      "code_assets": {
+        "c_compiler": {
+          "ar": "/usr/lib/llvm-16/bin/llvm-ar",
+          "cc": "/usr/lib/llvm-16/bin/clang",
+          "ld": "/usr/lib/llvm-16/bin/ld.lld"
+        },
+        "link_mode_preference": "dynamic",
+        "target_architecture": "x64",
+        "target_os": "linux"
+      }
+    },
     "linking_enabled": false
   },
   "out_dir": "/usr/local/google/home/dacoharkes/src/dacoharkes/playground/my_package/example/.dart_tool/native_assets_builder/my_package/79cc7fbaec53b1465c3e388e6848234b/out/",
diff --git a/pkgs/code_assets/test/data/build_input_macos.json b/pkgs/code_assets/test/data/build_input_macos.json
index 304d09a01..eec9ebd5b 100644
--- a/pkgs/code_assets/test/data/build_input_macos.json
+++ b/pkgs/code_assets/test/data/build_input_macos.json
@@ -17,6 +17,21 @@
       "target_architecture": "arm64",
       "target_os": "macos"
     },
+    "extensions": {
+      "code_assets": {
+        "c_compiler": {
+          "ar": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar",
+          "cc": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang",
+          "ld": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld"
+        },
+        "link_mode_preference": "dynamic",
+        "macos": {
+          "target_version": 13
+        },
+        "target_architecture": "arm64",
+        "target_os": "macos"
+      }
+    },
     "linking_enabled": false
   },
   "dependency_metadata": {
diff --git a/pkgs/code_assets/test/data/build_input_windows.json b/pkgs/code_assets/test/data/build_input_windows.json
index 37444cfd2..52dd31f95 100644
--- a/pkgs/code_assets/test/data/build_input_windows.json
+++ b/pkgs/code_assets/test/data/build_input_windows.json
@@ -22,6 +22,26 @@
       "target_architecture": "x64",
       "target_os": "windows"
     },
+    "extensions": {
+      "code_assets": {
+        "c_compiler": {
+          "ar": "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.35.32215\\bin\\Hostx64\\x64\\lib.exe",
+          "cc": "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.35.32215\\bin\\Hostx64\\x64\\cl.exe",
+          "env_script": "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Auxiliary\\Build\\vcvars64.bat",
+          "env_script_arguments": [],
+          "ld": "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.35.32215\\bin\\Hostx64\\x64\\link.exe",
+          "windows": {
+            "developer_command_prompt": {
+              "arguments": [],
+              "script": "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Auxiliary\\Build\\vcvars64.bat"
+            }
+          }
+        },
+        "link_mode_preference": "dynamic",
+        "target_architecture": "x64",
+        "target_os": "windows"
+      }
+    },
     "linking_enabled": false
   },
   "out_dir": "C:\\src\\dacoharkes\\playground\\my_package\\example\\.dart_tool\\native_assets_builder\\my_package\\190c04c47dc2f9eb26d2411b1968b2cf\\out\\",
diff --git a/pkgs/code_assets/test/data/link_input_macos.json b/pkgs/code_assets/test/data/link_input_macos.json
index 4722b6acf..1f25eef10 100644
--- a/pkgs/code_assets/test/data/link_input_macos.json
+++ b/pkgs/code_assets/test/data/link_input_macos.json
@@ -28,6 +28,21 @@
       },
       "target_architecture": "arm64",
       "target_os": "macos"
+    },
+    "extensions": {
+      "code_assets": {
+        "c_compiler": {
+          "ar": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar",
+          "cc": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang",
+          "ld": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld"
+        },
+        "link_mode_preference": "dynamic",
+        "macos": {
+          "target_version": 13
+        },
+        "target_architecture": "arm64",
+        "target_os": "macos"
+      }
     }
   },
   "out_dir": "/Users/dacoharkes/src/dacoharkes/playground/my_package/example/.dart_tool/native_assets_builder/my_package/ca4e7d3d4e7b8912cbd24d9e8a6cecdc/out/",
diff --git a/pkgs/code_assets/test/schema/schema_test.dart b/pkgs/code_assets/test/schema/schema_test.dart
index d74fb7ef8..2288831e9 100644
--- a/pkgs/code_assets/test/schema/schema_test.dart
+++ b/pkgs/code_assets/test/schema/schema_test.dart
@@ -96,21 +96,25 @@ FieldsFunction _codeFields(AllTestData allTestData) {
     ];
 
     return <(List<Object>, void Function(ValidationResults result))>[
-      if (inputOrOutput == InputOrOutput.input) ...[
-        (['config', 'code', 'c_compiler'], expectOptionalFieldMissing),
-        (['config', 'code', 'c_compiler', 'ar'], expectRequiredFieldMissing),
-        (['config', 'code', 'c_compiler', 'cc'], expectRequiredFieldMissing),
-        (['config', 'code', 'c_compiler', 'ld'], expectRequiredFieldMissing),
-        (['config', 'code', 'macos'], expectRequiredFieldMissing),
-        (
-          ['config', 'code', 'macos', 'target_version'],
-          expectRequiredFieldMissing,
-        ),
-        if (hook == Hook.link) ...[
-          for (final field in requiredCodeAssetFields)
-            (['assets', 0, ...field], expectRequiredFieldMissing),
+      for (final codeConfigPath in [
+        ['config', 'code'],
+        ['config', 'extensions', 'code_assets'],
+      ])
+        if (inputOrOutput == InputOrOutput.input) ...[
+          ([...codeConfigPath, 'c_compiler'], expectOptionalFieldMissing),
+          ([...codeConfigPath, 'c_compiler', 'ar'], expectRequiredFieldMissing),
+          ([...codeConfigPath, 'c_compiler', 'cc'], expectRequiredFieldMissing),
+          ([...codeConfigPath, 'c_compiler', 'ld'], expectRequiredFieldMissing),
+          ([...codeConfigPath, 'macos'], expectRequiredFieldMissing),
+          (
+            [...codeConfigPath, 'macos', 'target_version'],
+            expectRequiredFieldMissing,
+          ),
+          if (hook == Hook.link) ...[
+            for (final field in requiredCodeAssetFields)
+              (['assets', 0, ...field], expectRequiredFieldMissing),
+          ],
         ],
-      ],
       if (inputOrOutput == InputOrOutput.output) ...[
         for (final field in requiredCodeAssetFields)
           (['assets', 0, ...field], expectRequiredFieldMissing),
@@ -147,43 +151,55 @@ _codeFieldsWindows({
   required Hook hook,
   required Party party,
 }) => <(List<Object>, void Function(ValidationResults result))>[
-  if (inputOrOutput == InputOrOutput.input && hook == Hook.build) ...[
-    (
-      ['config', 'code', 'c_compiler', 'env_script'],
-      expectOptionalFieldMissing,
-    ),
-    (
-      ['config', 'code', 'c_compiler', 'env_script_arguments'],
-      expectOptionalFieldMissing,
-    ),
-    (['config', 'code', 'c_compiler', 'windows'], expectRequiredFieldMissing),
-    (
-      ['config', 'code', 'c_compiler', 'windows', 'developer_command_prompt'],
-      expectOptionalFieldMissing,
-    ),
-    (
-      [
-        'config',
-        'code',
-        'c_compiler',
-        'windows',
-        'developer_command_prompt',
-        'script',
-      ],
-      expectRequiredFieldMissing,
-    ),
-    (
-      [
-        'config',
-        'code',
-        'c_compiler',
-        'windows',
-        'developer_command_prompt',
-        'arguments',
-      ],
-      expectRequiredFieldMissing,
-    ),
-  ],
+  if (inputOrOutput == InputOrOutput.input && hook == Hook.build)
+    for (final codeConfigPath in [
+      ['config', 'code'],
+      ['config', 'extensions', 'code_assets'],
+    ]) ...[
+      (
+        [...codeConfigPath, 'c_compiler', 'env_script'],
+        expectOptionalFieldMissing,
+      ),
+      (
+        [...codeConfigPath, 'c_compiler', 'env_script_arguments'],
+        expectOptionalFieldMissing,
+      ),
+      (
+        [...codeConfigPath, 'c_compiler', 'windows'],
+        expectRequiredFieldMissing,
+      ),
+      (
+        [
+          ...codeConfigPath,
+          'c_compiler',
+          'windows',
+          'developer_command_prompt',
+        ],
+        expectOptionalFieldMissing,
+      ),
+      (
+        [
+          'config',
+          'code',
+          'c_compiler',
+          'windows',
+          'developer_command_prompt',
+          'script',
+        ],
+        expectRequiredFieldMissing,
+      ),
+      (
+        [
+          'config',
+          'code',
+          'c_compiler',
+          'windows',
+          'developer_command_prompt',
+          'arguments',
+        ],
+        expectRequiredFieldMissing,
+      ),
+    ],
 ];
 
 List<(List<Object>, void Function(ValidationResults result))> _codeFieldsIOS({
@@ -191,11 +207,18 @@ List<(List<Object>, void Function(ValidationResults result))> _codeFieldsIOS({
   required Hook hook,
   required Party party,
 }) => <(List<Object>, void Function(ValidationResults result))>[
-  if (inputOrOutput == InputOrOutput.input && hook == Hook.build) ...[
-    (['config', 'code', 'ios'], expectRequiredFieldMissing),
-    (['config', 'code', 'ios', 'target_sdk'], expectRequiredFieldMissing),
-    (['config', 'code', 'ios', 'target_version'], expectRequiredFieldMissing),
-  ],
+  if (inputOrOutput == InputOrOutput.input && hook == Hook.build)
+    for (final codeConfigPath in [
+      ['config', 'code'],
+      ['config', 'extensions', 'code_assets'],
+    ]) ...[
+      ([...codeConfigPath, 'ios'], expectRequiredFieldMissing),
+      ([...codeConfigPath, 'ios', 'target_sdk'], expectRequiredFieldMissing),
+      (
+        [...codeConfigPath, 'ios', 'target_version'],
+        expectRequiredFieldMissing,
+      ),
+    ],
 ];
 
 List<(List<Object>, void Function(ValidationResults result))>
@@ -204,11 +227,15 @@ _codeFieldsAndroid({
   required Hook hook,
   required Party party,
 }) => <(List<Object>, void Function(ValidationResults result))>[
-  if (inputOrOutput == InputOrOutput.input && hook == Hook.build) ...[
-    (['config', 'code', 'android'], expectRequiredFieldMissing),
-    (
-      ['config', 'code', 'android', 'target_ndk_api'],
-      expectRequiredFieldMissing,
-    ),
-  ],
+  if (inputOrOutput == InputOrOutput.input && hook == Hook.build)
+    for (final codeConfigPath in [
+      ['config', 'code'],
+      ['config', 'extensions', 'code_assets'],
+    ]) ...[
+      ([...codeConfigPath, 'android'], expectRequiredFieldMissing),
+      (
+        [...codeConfigPath, 'android', 'target_ndk_api'],
+        expectRequiredFieldMissing,
+      ),
+    ],
 ];
diff --git a/pkgs/hook/doc/schema/shared/shared_definitions.schema.json b/pkgs/hook/doc/schema/shared/shared_definitions.schema.json
index a4a1cbfe5..78970aa35 100644
--- a/pkgs/hook/doc/schema/shared/shared_definitions.schema.json
+++ b/pkgs/hook/doc/schema/shared/shared_definitions.schema.json
@@ -89,12 +89,19 @@
           "items": {
             "type": "string"
           }
+        },
+        "extensions": {
+          "$ref": "#/definitions/ConfigExtensions"
         }
       },
       "required": [
         "build_asset_types"
       ]
     },
+    "ConfigExtensions": {
+      "type": "object",
+      "additionalProperties": true
+    },
     "HookInput": {
       "type": "object",
       "properties": {
diff --git a/pkgs/hook/tool/generate_schemas.dart b/pkgs/hook/tool/generate_schemas.dart
index 600c1835c..f44ac8285 100644
--- a/pkgs/hook/tool/generate_schemas.dart
+++ b/pkgs/hook/tool/generate_schemas.dart
@@ -114,7 +114,7 @@ void generateSharedDefinitions() {
                       r'$ref':
                           '../shared/shared_definitions${package == 'hook' ? '' : '.generated'}.schema.json#/definitions/${definitionName(hook, inputOrOutput)}',
                     },
-                  if (package == 'hook' && party != Party.shared)
+                  if (package != 'data_assets' && party != Party.shared)
                     {
                       r'$ref':
                           'shared_definitions.schema.json#/definitions/${definitionName(hook, inputOrOutput)}',
diff --git a/pkgs/hook/tool/generate_syntax.dart b/pkgs/hook/tool/generate_syntax.dart
index c4744f951..92efb9050 100644
--- a/pkgs/hook/tool/generate_syntax.dart
+++ b/pkgs/hook/tool/generate_syntax.dart
@@ -40,6 +40,7 @@ void main(List<String> args) {
           publicSetters: [
             'BuildOutput',
             'Config',
+            'ConfigExtensions',
             'HookInput',
             'HookOutput',
             'LinkOutput',
@@ -56,6 +57,7 @@ void main(List<String> args) {
                     'DeveloperCommandPrompt',
                     'CodeConfig',
                     'Config',
+                    'ConfigExtensions',
                     'IOSCodeConfig',
                     'LinkMode',
                     'DynamicLoadingBundleLinkMode',
diff --git a/pkgs/native_assets_cli/lib/src/code_assets/config.dart b/pkgs/native_assets_cli/lib/src/code_assets/config.dart
index fe56aeaaa..3c76abccc 100644
--- a/pkgs/native_assets_cli/lib/src/code_assets/config.dart
+++ b/pkgs/native_assets_cli/lib/src/code_assets/config.dart
@@ -42,7 +42,9 @@ class CodeConfig {
   final syntax.CodeConfig _syntax;
 
   CodeConfig._fromJson(Map<String, Object?> json, List<Object> path)
-    : _syntax = syntax.Config.fromJson(json, path: path).code!;
+    : _syntax =
+          syntax.Config.fromJson(json, path: path).extensions?.codeAssets ??
+          syntax.Config.fromJson(json, path: path).code!;
 
   /// The architecture the code code asset should be built for.
   ///
@@ -191,9 +193,7 @@ extension CodeAssetBuildInputBuilder on HookConfigBuilder {
     IOSCodeConfig? iOS,
     MacOSCodeConfig? macOS,
   }) {
-    syntax.Config.fromJson(
-      hook_syntax.HookInput.fromJson(builder.json).config.json,
-    ).code = syntax.CodeConfig(
+    final codeConfig = syntax.CodeConfig(
       linkModePreference: linkModePreference.toSyntax(),
       targetArchitecture: targetArchitecture.toSyntax(),
       targetOs: targetOS.toSyntax(),
@@ -202,6 +202,11 @@ extension CodeAssetBuildInputBuilder on HookConfigBuilder {
       iOS: iOS?.toSyntax(),
       macOS: macOS?.toSyntax(),
     );
+    final baseHookConfig = hook_syntax.HookInput.fromJson(builder.json).config;
+    baseHookConfig.extensions ??= {};
+    final hookConfig = syntax.Config.fromJson(baseHookConfig.json);
+    hookConfig.extensions!.codeAssets = codeConfig;
+    hookConfig.code = codeConfig; // old location
   }
 }
 
diff --git a/pkgs/native_assets_cli/lib/src/code_assets/syntax.g.dart b/pkgs/native_assets_cli/lib/src/code_assets/syntax.g.dart
index ffdd922bd..07111922f 100644
--- a/pkgs/native_assets_cli/lib/src/code_assets/syntax.g.dart
+++ b/pkgs/native_assets_cli/lib/src/code_assets/syntax.g.dart
@@ -620,8 +620,11 @@ class Config {
 
   Config.fromJson(this.json, {this.path = const []});
 
-  Config({required CodeConfig? code}) : json = {}, path = const [] {
+  Config({required CodeConfig? code, required ConfigExtensions? extensions})
+    : json = {},
+      path = const [] {
     this.code = code;
+    this.extensions = extensions;
     json.sortOnKey();
   }
 
@@ -644,12 +647,72 @@ class Config {
     return code?.validate() ?? [];
   }
 
-  List<String> validate() => [..._validateCode()];
+  ConfigExtensions? get extensions {
+    final jsonValue = _reader.optionalMap('extensions');
+    if (jsonValue == null) return null;
+    return ConfigExtensions.fromJson(jsonValue, path: [...path, 'extensions']);
+  }
+
+  set extensions(ConfigExtensions? value) {
+    json.setOrRemove('extensions', value?.json);
+    json.sortOnKey();
+  }
+
+  List<String> _validateExtensions() {
+    final mapErrors = _reader.validate<Map<String, Object?>?>('extensions');
+    if (mapErrors.isNotEmpty) {
+      return mapErrors;
+    }
+    return extensions?.validate() ?? [];
+  }
+
+  List<String> validate() => [..._validateCode(), ..._validateExtensions()];
 
   @override
   String toString() => 'Config($json)';
 }
 
+class ConfigExtensions {
+  final Map<String, Object?> json;
+
+  final List<Object> path;
+
+  JsonReader get _reader => JsonReader(json, path);
+
+  ConfigExtensions.fromJson(this.json, {this.path = const []});
+
+  ConfigExtensions({required CodeConfig? codeAssets})
+    : json = {},
+      path = const [] {
+    this.codeAssets = codeAssets;
+    json.sortOnKey();
+  }
+
+  CodeConfig? get codeAssets {
+    final jsonValue = _reader.optionalMap('code_assets');
+    if (jsonValue == null) return null;
+    return CodeConfig.fromJson(jsonValue, path: [...path, 'code_assets']);
+  }
+
+  set codeAssets(CodeConfig? value) {
+    json.setOrRemove('code_assets', value?.json);
+    json.sortOnKey();
+  }
+
+  List<String> _validateCodeAssets() {
+    final mapErrors = _reader.validate<Map<String, Object?>?>('code_assets');
+    if (mapErrors.isNotEmpty) {
+      return mapErrors;
+    }
+    return codeAssets?.validate() ?? [];
+  }
+
+  List<String> validate() => [..._validateCodeAssets()];
+
+  @override
+  String toString() => 'ConfigExtensions($json)';
+}
+
 class IOSCodeConfig {
   final Map<String, Object?> json;
 
diff --git a/pkgs/native_assets_cli/lib/src/hook/syntax.g.dart b/pkgs/native_assets_cli/lib/src/hook/syntax.g.dart
index 6f2390bb2..c1b025214 100644
--- a/pkgs/native_assets_cli/lib/src/hook/syntax.g.dart
+++ b/pkgs/native_assets_cli/lib/src/hook/syntax.g.dart
@@ -41,8 +41,11 @@ class Asset {
 class BuildConfig extends Config {
   BuildConfig.fromJson(super.json, {super.path}) : super.fromJson();
 
-  BuildConfig({required super.buildAssetTypes, required bool linkingEnabled})
-    : super() {
+  BuildConfig({
+    required super.buildAssetTypes,
+    required super.extensions,
+    required bool linkingEnabled,
+  }) : super() {
     _linkingEnabled = linkingEnabled;
     json.sortOnKey();
   }
@@ -281,8 +284,13 @@ class Config {
 
   Config.fromJson(this.json, {this.path = const []});
 
-  Config({required List<String> buildAssetTypes}) : json = {}, path = const [] {
+  Config({
+    required List<String> buildAssetTypes,
+    required Map<String, Object?>? extensions,
+  }) : json = {},
+       path = const [] {
     this.buildAssetTypes = buildAssetTypes;
+    this.extensions = extensions;
     json.sortOnKey();
   }
 
@@ -296,7 +304,20 @@ class Config {
   List<String> _validateBuildAssetTypes() =>
       _reader.validateStringList('build_asset_types');
 
-  List<String> validate() => [..._validateBuildAssetTypes()];
+  Map<String, Object?>? get extensions => _reader.optionalMap('extensions');
+
+  set extensions(Map<String, Object?>? value) {
+    json.setOrRemove('extensions', value);
+    json.sortOnKey();
+  }
+
+  List<String> _validateExtensions() =>
+      _reader.validateOptionalMap('extensions');
+
+  List<String> validate() => [
+    ..._validateBuildAssetTypes(),
+    ..._validateExtensions(),
+  ];
 
   @override
   String toString() => 'Config($json)';
diff --git a/pkgs/native_assets_cli/test/checksum_test.dart b/pkgs/native_assets_cli/test/checksum_test.dart
index b0c64bfb5..0060a099e 100644
--- a/pkgs/native_assets_cli/test/checksum_test.dart
+++ b/pkgs/native_assets_cli/test/checksum_test.dart
@@ -95,68 +95,68 @@ void main() {
     // needing to update this list).
 
     final expectedChecksums = <String>[
-      '373d25ca3201cf61ff42048b5fe67c24',
-      '76c914f249d8e0dec9ea88eedd796737',
-      '03846a8382cf6f5052f82f9917562e70',
-      'b219b76aa364c90168b4a1e57372c7a0',
-      '61288538db9d98b280f5c27dc094aeb8',
-      'fde745d50ebcc6d16d312fdc493a30c5',
-      '65444c11c83a84e63b974e3643a10da7',
-      'aaee85324a2b2ddc9d641c4cef1780a9',
-      '9cbb27c2c60e6336985f7083715eeb15',
-      '2898b73da7fd05f28b066ab212aff277',
-      '7b823719e472096087c6dc6ed16c1322',
-      'f11f9e90c3611524429786301a345763',
-      '1939726b2173808f28e1de412165f541',
-      'a56d14a636b307825d9dca40531ebbe4',
-      '6c9f6b3254a394727bef590cc9bcf7c2',
-      '2ed14db4ec08a01cdd293a91201b668b',
-      'c6558f264707b7cec3ba59a213a51a07',
-      'b9bdf9933922c88f1f858565aed2f9b2',
-      '04b4dd22c9917cea4d0876d3a4a7c076',
-      '89b4df38c0750b959e3b91556b5340c5',
+      '94c285a130d88664be8f21c1d6ef34cd',
+      '57721cad5c11285edb0016515541e2d5',
+      'd9b5d713b0b6a18c67d5e490cdbd074f',
+      'db5406082ee570220c97eb1f123e718c',
+      'b78638ece1b0a543d09318d48aa9a6c8',
+      'ca297a62f6b0dfcf2823528ae4dfd08e',
+      '264c307b448f3f9304b1ccab6ec60075',
+      'b4a04739d33b007f4058492d3df94955',
+      'ec48ca9f46c95620b209837d710e46d4',
+      'faa7c97c28a4fc4b4856e7a27f34d717',
+      'cb775af7eb5733a85226089f6fb5a8c6',
+      '6d815c7d59f04707891ede5a23136787',
+      '0231d5d5a4def1870ea81b316c0f232b',
+      'b87236e226c6338dccff134e9ee971f9',
+      '6e7b17bf18d55557e0eed5d2050e4401',
+      'e393e7d58700da05843a5cf8db102fde',
+      'd3080b3502953a53cb63a5509bba1eee',
+      'a27bf133693f18dee751b7f9661725ad',
+      '93a1f07ea89f1b9f57a23bb7aed77c7e',
+      '6f802ed01d66cb9529540387ec26d4bc',
       'a648f38bcc571d5800d549fa9146c161',
-      '9d6255bb88e0c174cfd73326374653fb',
-      '3a5c1e777cb824b9df6e8812db7f014f',
-      '569bbc36d2252ad007e86bbbc91cab4a',
-      '85f5f97cd1b4c42f88e77d23bf9337d2',
-      'db76cd3ef567bc0a20a805d7ff78c89b',
-      '81861002f1a66a0d0edbd8191a550b9d',
-      '4b5e64761e6a8aaafc489ed0d627caa5',
-      '6e493366b0ff7e397134fcc004840b61',
-      'fcdb6b85f369b18ce0bf6e71dfed9711',
-      '6505fb7e18c7572486d4bceb9267c829',
-      '2f208ebb3f2a86fadf16f30d6eb83c60',
-      '8a1a8a1378f0205cf82b39d6d9ef0c06',
-      '3d9a25a9a4724ef6b9c4098117d476ea',
-      '427caa5594959f686108440aae237d23',
-      '3b1fd713e83549612ec6813fc21d406d',
-      '35e34c04cb001ef1df0a91debe4ec876',
-      '1d44781858b032eab6081840a33cb992',
-      '0dec96f613afa0481e7359069060cc3d',
-      '1a2b62ccd83da975b42752c5a136d104',
-      'e132b66dbb18e36e85dfa0c817a74590',
+      'e7a0bed5b00346177a24ced2860136bb',
+      '14b0fcffdc10411a0119641a04e84f24',
+      '3a9112376cfba8ed524306533e0ba64c',
+      '87ba90976f0ac1720ac9ae3ab3e04ed6',
+      'ebcc2a8b819d79ea3bd9ba8669c49286',
+      '1441b71d0db6c1fa226a013605716bcb',
+      'e1946bf4587c22123e97ef19d2c63050',
+      '83acde5a35b0cde1a861082d1ffd0097',
+      'fd6bc0ef963c6d65ef616779f203dc0f',
+      '5b5a62e841327b1afdda64dba0f8a3e2',
+      'c64865e81ee7e701a2a52ea344998693',
+      '050ad3d2db8581feed77c17c22564789',
+      '118569cd7c4c12baa4eaea9c70dc2dd3',
+      '5e38c88dcdec92bf701d170f10cb0063',
+      'dd330565f2ff2a2d7bb2a480cfc25b12',
+      '8e36a6f17eb303799056f0aa1737a1fe',
+      '40035559d1a93b3ebe7d2986b2c99aea',
+      '786716ef01b49293cf3493b22fcb2518',
+      '9f8655c03f8f2f0bc27ae6917390f4e1',
+      '3139d774dcddfba7705072397a59b9fe',
       '59bc110e371c5e9c8b04f6453d09584d',
-      '8ee9d30cc420cd9212348d2c4222c6ee',
-      '70e422b86e227f740b9a72980d0d12d8',
-      'fc6fbfe32afac158157cb02dde609e52',
-      '5dec2c2e2ff5ba0403ae6ff7d7ae5b3b',
-      '116057a6e64e3aaf95cdbd70dd056bce',
-      '07b4c2e72d4a3c2cb684edff2037bd38',
-      '91c7ff44c0d157514eba5f01ac960dd9',
-      'c5b859d9d1d59cd46368ebbabb78902f',
-      '8b94ecb5699de5730c8545abafe30c11',
-      '936624d135da96cdfc0dd7b038909521',
-      'b158baa7fc7a12252592f02e672e31a7',
-      '47514c281f37a35ba6b70090dadf787d',
-      '0de0ab1c36a35279d6f7fc2a1d69174f',
-      'dc97054090baaaf646f73d11c9142293',
-      '153aa59e1a9dc2667a69c1388ef2dca9',
-      '5d4c049a66acc31f54d2a99d2b8ecf98',
-      '36f450524b4ab720c243c3daf54ff283',
-      '8d701a6f5446d10c1f965eece8cf4b8a',
-      'd7e29713d72316e019e0f512f91b432d',
-      '19be742ac2c24d9764de06aba70a31eb',
+      'f3c6c5de6568f639d67e03b07818acc6',
+      '59b5e3250d97b1cfe15ad65198882e7c',
+      '6bc2d951c8f99290a94b9a865476c512',
+      '6aa6ede0d3f0be509a7ee30121403d2c',
+      '80b03895e3dd0e4e4697558bf57a354d',
+      '03de9929411b19bb1c840c7188e2bddb',
+      'c1179c3e37c5936c915747bdaa9bc180',
+      '86c530550aea1db7f07501eecd5461ab',
+      'a7911874e29e9696bba7dceeaef99a78',
+      '9cd55f6b3c45ecb8563c476bc88052a8',
+      'b05ed1e42541d90f2ef3b4180921fc67',
+      '229db175097f0ea52b6f2a995a526dff',
+      'd2a66fc795288cc2e5d68d4ed7286fd0',
+      'be81bebbf4c55f9deb56a73d25cc2750',
+      'c2be87cc81c5a1276c454d67d00238e0',
+      '4ff44ba1c783becaa20f5810fb02f9d1',
+      'ed210e050e2907f66a0e420d143be823',
+      '3d768c496687797c2f141cbc9af0d641',
+      'e9a36b9242d1f5b5eddb7fd084903264',
+      '645460d5ebb3374201eba75e5545d0d2',
       'bbdaf85e3a026c0bd87a56e7102a6beb',
     ];
     printOnFailure('final expectedChecksums = <String>[');
diff --git a/pkgs/native_assets_cli/test/code_assets/config_test.dart b/pkgs/native_assets_cli/test/code_assets/config_test.dart
index 6ae789260..4a3c8e96c 100644
--- a/pkgs/native_assets_cli/test/code_assets/config_test.dart
+++ b/pkgs/native_assets_cli/test/code_assets/config_test.dart
@@ -52,51 +52,55 @@ void main() async {
     String hookType = 'build',
     bool includeDeprecated = false,
     OS targetOS = OS.android,
-  }) => {
-    if (hookType == 'link')
-      'assets': [
-        {
-          'architecture': 'riscv64',
-          'file': 'not there',
-          'id': 'package:my_package/name',
-          'link_mode': {'type': 'dynamic_loading_bundle'},
-          'os': 'android',
-          'type': 'native_code',
-        },
-      ],
-    'config': {
-      'build_asset_types': ['native_code'],
-      if (hookType == 'build') 'linking_enabled': false,
-      'code': {
-        'target_architecture': 'arm64',
-        'target_os': targetOS.name,
-        'link_mode_preference': 'prefer_static',
-        'c_compiler': {
-          'ar': fakeAr.toFilePath(),
-          'ld': fakeLd.toFilePath(),
-          'cc': fakeClang.toFilePath(),
-          if (includeDeprecated) 'env_script': fakeVcVars.toFilePath(),
-          if (includeDeprecated) 'env_script_arguments': ['arg0', 'arg1'],
-          'windows': {
-            'developer_command_prompt': {
-              'arguments': ['arg0', 'arg1'],
-              'script': fakeVcVars.toFilePath(),
-            },
+  }) {
+    final codeConfig = {
+      'target_architecture': 'arm64',
+      'target_os': targetOS.name,
+      'link_mode_preference': 'prefer_static',
+      'c_compiler': {
+        'ar': fakeAr.toFilePath(),
+        'ld': fakeLd.toFilePath(),
+        'cc': fakeClang.toFilePath(),
+        if (includeDeprecated) 'env_script': fakeVcVars.toFilePath(),
+        if (includeDeprecated) 'env_script_arguments': ['arg0', 'arg1'],
+        'windows': {
+          'developer_command_prompt': {
+            'arguments': ['arg0', 'arg1'],
+            'script': fakeVcVars.toFilePath(),
           },
         },
-        if (targetOS == OS.android) 'android': {'target_ndk_api': 30},
-        if (targetOS == OS.macOS) 'macos': {'target_version': 13},
-        if (targetOS == OS.iOS)
-          'ios': {'target_sdk': 'iphoneos', 'target_version': 13},
       },
-    },
-    'out_dir_shared': outputDirectoryShared.toFilePath(),
-    'out_dir': outDirUri.toFilePath(),
-    'out_file': outFile.toFilePath(),
-    'package_name': packageName,
-    'package_root': packageRootUri.toFilePath(),
-    'version': '1.9.0',
-  };
+      if (targetOS == OS.android) 'android': {'target_ndk_api': 30},
+      if (targetOS == OS.macOS) 'macos': {'target_version': 13},
+      if (targetOS == OS.iOS)
+        'ios': {'target_sdk': 'iphoneos', 'target_version': 13},
+    };
+    return {
+      if (hookType == 'link')
+        'assets': [
+          {
+            'architecture': 'riscv64',
+            'file': 'not there',
+            'id': 'package:my_package/name',
+            'link_mode': {'type': 'dynamic_loading_bundle'},
+            'os': 'android',
+            'type': 'native_code',
+          },
+        ],
+      'config': {
+        'code': codeConfig,
+        'build_asset_types': ['native_code'],
+        'extensions': {'code_assets': codeConfig},
+        if (hookType == 'build') 'linking_enabled': false,
+      },
+      'out_dir_shared': outputDirectoryShared.toFilePath(),
+      'out_dir': outDirUri.toFilePath(),
+      'out_file': outFile.toFilePath(),
+      'package_name': packageName,
+      'package_root': packageRootUri.toFilePath(),
+      'version': '1.9.0',
+    };
+  }
 
   void expectCorrectCodeConfig(
     CodeConfig codeCondig, {
@@ -239,6 +243,28 @@ void main() async {
 
   test('LinkInput.config.code.target_os invalid type', () {
     final input = inputJson(hookType: 'link');
+    traverseJson<Map<String, Object?>>(input, [
+          'config',
+          'extensions',
+          'code_assets',
+        ])['target_os'] =
+        123;
+    expect(
+      () => LinkInput(input).config.code.targetOS,
+      throwsA(
+        predicate(
+          (e) =>
+              e is FormatException &&
+              e.message.contains(
+                "Unexpected value '123' (int) for "
+                "'config.extensions.code_assets.target_os'. "
+                'Expected a String.',
+              ),
+        ),
+      ),
+    );
+
+    traverseJson<Map<String, Object?>>(input, ['config']).remove('extensions');
     traverseJson<Map<String, Object?>>(input, ['config', 'code'])['target_os'] =
         123;
     expect(
@@ -258,6 +284,26 @@ void main() async {
 
   test('LinkInput.config.code.link_mode_preference missing', () {
     final input = inputJson(hookType: 'link');
+    traverseJson<Map<String, Object?>>(input, [
+      'config',
+      'extensions',
+      'code_assets',
+    ]).remove('link_mode_preference');
+    expect(
+      () => LinkInput(input).config.code.linkModePreference,
+      throwsA(
+        predicate(
+          (e) =>
+              e is FormatException &&
+              e.message.contains(
+                'No value was provided for '
+                "'config.extensions.code_assets.link_mode_preference'.",
+              ),
+        ),
+      ),
+    );
+
+    traverseJson<Map<String, Object?>>(input, ['config']).remove('extensions');
     traverseJson<Map<String, Object?>>(input, [
       'config',
       'code',