diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e7bd292..7afe6886 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 2.0.0-alpha.24
+* Add `AngelEnv` class to `core`.
+* Deprecate `Angel.isProduction`, in favor of `AngelEnv`.
+
 # 2.0.0-alpha.23
 * `ResponseContext.render` sets `charset` to `utf8` in `contentType`.
 
diff --git a/analysis_options.yaml b/analysis_options.yaml
index a0ee1ea1..fb26f9d9 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -3,4 +3,4 @@ analyzer:
     implicit-casts: false
 linter:
   rules:
-    - avoid_slow_async_io
\ No newline at end of file
+    - avoid_slow_async_io
diff --git a/lib/src/core/controller.dart b/lib/src/core/controller.dart
index c30c05fc..01ba1713 100644
--- a/lib/src/core/controller.dart
+++ b/lib/src/core/controller.dart
@@ -75,9 +75,9 @@ class Controller {
           methodName != 'call' &&
           methodName != 'equals' &&
           methodName != '==') {
-        Expose exposeDecl = decl.function.annotations
+        var exposeDecl = decl.function.annotations
             .map((m) => m.reflectee)
-            .firstWhere((r) => r is Expose, orElse: () => null);
+            .firstWhere((r) => r is Expose, orElse: () => null) as Expose;
 
         if (exposeDecl == null) return;
 
diff --git a/lib/src/core/core.dart b/lib/src/core/core.dart
index 3822463a..755ae9ae 100644
--- a/lib/src/core/core.dart
+++ b/lib/src/core/core.dart
@@ -1,6 +1,7 @@
 export 'anonymous_service.dart';
 export 'controller.dart';
 export 'driver.dart';
+export 'env.dart';
 export 'hooked_service.dart';
 export 'map_service.dart';
 export 'metadata.dart';
diff --git a/lib/src/core/env.dart b/lib/src/core/env.dart
index fa0860ca..b43e0bfa 100644
--- a/lib/src/core/env.dart
+++ b/lib/src/core/env.dart
@@ -1,15 +1,15 @@
 import 'dart:io';
 
 /// A constant instance of [AngelEnv].
-const AngelEnv angelEnv = const AngelEnv();
+const AngelEnvironment angelEnv = const AngelEnvironment();
 
 /// Queries the environment's `ANGEL_ENV` value.
-class AngelEnv {
+class AngelEnvironment {
   final String _customValue;
 
   /// You can optionally provide a custom value, in order to override the system's
   /// value.
-  const AngelEnv([this._customValue]);
+  const AngelEnvironment([this._customValue]);
 
   /// Returns the value of the `ANGEL_ENV` variable; defaults to `'development'`.
   String get value =>
diff --git a/lib/src/core/hooked_service.dart b/lib/src/core/hooked_service.dart
index 658d822a..25669c8d 100644
--- a/lib/src/core/hooked_service.dart
+++ b/lib/src/core/hooked_service.dart
@@ -90,7 +90,7 @@ class HookedService<Id, Data, T extends Service<Id, Data>>
 
   /// Adds hooks to this instance.
   void addHooks(Angel app) {
-    Hooks hooks = getAnnotation(inner, Hooks, app.container.reflector);
+    Hooks hooks = getAnnotation<Hooks>(inner, app.container.reflector);
     List<HookedServiceEventListener<Id, Data, T>> before = [], after = [];
 
     if (hooks != null) {
@@ -101,7 +101,7 @@ class HookedService<Id, Data, T extends Service<Id, Data>>
     void applyListeners(
         Function fn, HookedServiceEventDispatcher<Id, Data, T> dispatcher,
         [bool isAfter]) {
-      Hooks hooks = getAnnotation(fn, Hooks, app.container.reflector);
+      Hooks hooks = getAnnotation<Hooks>(fn, app.container.reflector);
       final listeners = <HookedServiceEventListener<Id, Data, T>>[]
         ..addAll(isAfter == true ? after : before);
 
diff --git a/lib/src/core/injection.dart b/lib/src/core/injection.dart
index 98c4cb84..dd14e81b 100644
--- a/lib/src/core/injection.dart
+++ b/lib/src/core/injection.dart
@@ -53,8 +53,8 @@ resolveInjection(requirement, InjectionRequest injection, RequestContext req,
       requirement.length == 2 &&
       requirement.first is String &&
       requirement.last is Type) {
-    String key = requirement.first;
-    Type type = requirement.last;
+    var key = requirement.first;
+    var type = requirement.last;
     if (req.params.containsKey(key) ||
         req.app.configuration.containsKey(key) ||
         _primitiveTypes.contains(type)) {
diff --git a/lib/src/core/map_service.dart b/lib/src/core/map_service.dart
index adcc854e..75eef3df 100644
--- a/lib/src/core/map_service.dart
+++ b/lib/src/core/map_service.dart
@@ -51,7 +51,7 @@ class MapService extends Service<String, Map<String, dynamic>> {
     if (allowQuery == false || params == null || params['query'] is! Map)
       return new Future.value(items);
     else {
-      Map query = params['query'];
+      var query = params['query'] as Map;
 
       return new Future.value(items.where((item) {
         for (var key in query.keys) {
diff --git a/lib/src/core/routable.dart b/lib/src/core/routable.dart
index 2a51f01a..01cfe1a9 100644
--- a/lib/src/core/routable.dart
+++ b/lib/src/core/routable.dart
@@ -99,7 +99,7 @@ class Routable extends Router<RequestHandler> {
     final handlers = <RequestHandler>[];
     // Merge @Middleware declaration, if any
     Middleware middlewareDeclaration =
-        getAnnotation(handler, Middleware, _container?.reflector);
+        getAnnotation<Middleware>(handler, _container?.reflector);
     if (middlewareDeclaration != null) {
       handlers.addAll(middlewareDeclaration.handlers);
     }
diff --git a/lib/src/core/server.dart b/lib/src/core/server.dart
index af9cc062..8e944e60 100644
--- a/lib/src/core/server.dart
+++ b/lib/src/core/server.dart
@@ -15,6 +15,7 @@ import 'package:mime/mime.dart';
 import 'package:tuple/tuple.dart';
 
 import 'controller.dart';
+import 'env.dart';
 import 'hooked_service.dart';
 import 'request_context.dart';
 import 'response_context.dart';
@@ -42,7 +43,6 @@ class Angel extends Routable {
           MiddlewarePipeline>> handlerCache = new HashMap();
 
   Router<RequestHandler> _flattened;
-  bool _isProduction;
   Angel _parent;
 
   /// A global Map of converters that can transform responses bodies.
@@ -75,6 +75,8 @@ class Angel extends Routable {
   /// A set of [Controller] objects that have been loaded into the application.
   Map<Pattern, Controller> get controllers => _controllers;
 
+  /// Now *deprecated*, in favor of [AngelEnv] and [angelEnv].
+  ///
   /// Indicates whether the application is running in a production environment.
   ///
   /// The criteria for this is the `ANGEL_ENV` environment variable being set to
@@ -82,10 +84,8 @@ class Angel extends Routable {
   ///
   /// This value is memoized the first time you call it, so do not change environment
   /// configuration at runtime!
-  bool get isProduction {
-    return _isProduction ??=
-        (Platform.environment['ANGEL_ENV'] == 'production');
-  }
+  @deprecated
+  bool get isProduction => angelEnv.isProduction;
 
   /// Returns the parent instance of this application, if any.
   Angel get parent => _parent;
@@ -282,7 +282,7 @@ class Angel extends Routable {
     return parent != null ? parent.findProperty(key) : null;
   }
 
-  /// Runs several optimizations, *if* [isProduction] is `true`.
+  /// Runs several optimizations, *if* [angelEnv.isProduction] is `true`.
   ///
   /// * Preprocesses all dependency injection, and eliminates the burden of reflecting handlers
   /// at run-time.
@@ -291,7 +291,6 @@ class Angel extends Routable {
   /// You may [force] the optimization to run, if you are not running in production.
   void optimizeForProduction({bool force: false}) {
     if (isProduction == true || force == true) {
-      _isProduction = true;
       _flattened ??= flatten(this);
       logger?.info('Angel is running in production mode.');
     }
diff --git a/lib/src/core/service.dart b/lib/src/core/service.dart
index 755fb6b1..7eb6d840 100644
--- a/lib/src/core/service.dart
+++ b/lib/src/core/service.dart
@@ -195,12 +195,12 @@ class Service<Id, Data> extends Routable {
 
     // Add global middleware if declared on the instance itself
     Middleware before =
-        getAnnotation(service, Middleware, app.container.reflector);
+        getAnnotation<Middleware>(service, app.container.reflector);
 
     if (before != null) handlers.addAll(before.handlers);
 
     Middleware indexMiddleware =
-        getAnnotation(service.index, Middleware, app.container.reflector);
+        getAnnotation<Middleware>(service.index, app.container.reflector);
     get('/', (req, res) {
       return this.index(mergeMap([
         {'query': req.queryParameters},
@@ -213,7 +213,7 @@ class Service<Id, Data> extends Routable {
           ..addAll((indexMiddleware == null) ? [] : indexMiddleware.handlers));
 
     Middleware createMiddleware =
-        getAnnotation(service.create, Middleware, app.container.reflector);
+        getAnnotation<Middleware>(service.create, app.container.reflector);
     post('/', (req, ResponseContext res) {
       return req.parseBody().then((_) {
         return this
@@ -236,7 +236,7 @@ class Service<Id, Data> extends Routable {
               (createMiddleware == null) ? [] : createMiddleware.handlers));
 
     Middleware readMiddleware =
-        getAnnotation(service.read, Middleware, app.container.reflector);
+        getAnnotation<Middleware>(service.read, app.container.reflector);
 
     get('/:id', (req, res) {
       return this.read(
@@ -252,7 +252,7 @@ class Service<Id, Data> extends Routable {
           ..addAll((readMiddleware == null) ? [] : readMiddleware.handlers));
 
     Middleware modifyMiddleware =
-        getAnnotation(service.modify, Middleware, app.container.reflector);
+        getAnnotation<Middleware>(service.modify, app.container.reflector);
     patch('/:id', (req, res) {
       return req.parseBody().then((_) {
         return this.modify(
@@ -271,7 +271,7 @@ class Service<Id, Data> extends Routable {
               (modifyMiddleware == null) ? [] : modifyMiddleware.handlers));
 
     Middleware updateMiddleware =
-        getAnnotation(service.update, Middleware, app.container.reflector);
+        getAnnotation<Middleware>(service.update, app.container.reflector);
     post('/:id', (req, res) {
       return req.parseBody().then((_) {
         return this.update(
@@ -306,7 +306,7 @@ class Service<Id, Data> extends Routable {
               (updateMiddleware == null) ? [] : updateMiddleware.handlers));
 
     Middleware removeMiddleware =
-        getAnnotation(service.remove, Middleware, app.container.reflector);
+        getAnnotation<Middleware>(service.remove, app.container.reflector);
     delete('/', (req, res) {
       return this.remove(
           null,
diff --git a/lib/src/util.dart b/lib/src/util.dart
index e3537a22..8ae812b8 100644
--- a/lib/src/util.dart
+++ b/lib/src/util.dart
@@ -2,26 +2,26 @@ import 'package:angel_container/angel_container.dart';
 
 final RegExp straySlashes = new RegExp(r'(^/+)|(/+$)');
 
-matchingAnnotation(List<ReflectedInstance> metadata, Type T) {
+T matchingAnnotation<T>(List<ReflectedInstance> metadata) {
   for (ReflectedInstance metaDatum in metadata) {
     if (metaDatum.type.reflectedType == T) {
-      return metaDatum.reflectee;
+      return metaDatum.reflectee as T;
     }
   }
 
   return null;
 }
 
-getAnnotation(obj, Type T, Reflector reflector) {
+T getAnnotation<T>(obj, Reflector reflector) {
   if (reflector == null) {
     return null;
   } else {
     if (obj is Function) {
       var methodMirror = reflector.reflectFunction(obj);
-      return matchingAnnotation(methodMirror.annotations, T);
+      return matchingAnnotation<T>(methodMirror.annotations);
     } else {
       var classMirror = reflector.reflectClass(obj.runtimeType as Type);
-      return matchingAnnotation(classMirror.annotations, T);
+      return matchingAnnotation<T>(classMirror.annotations);
     }
   }
 }
diff --git a/test/controller_test.dart b/test/controller_test.dart
index 72277a20..2a470a29 100644
--- a/test/controller_test.dart
+++ b/test/controller_test.dart
@@ -122,7 +122,7 @@ main() {
 
     expect(rgx.firstMatch(response.body)?.start, equals(0));
 
-    Map todo = json.decode(response.body.replaceAll(rgx, ""));
+    var todo = json.decode(response.body.replaceAll(rgx, "")) as Map;
     print("Todo: $todo");
     expect(todo['text'], equals("Hello"));
     expect(todo['over'], equals("world"));
diff --git a/test/di_test.dart b/test/di_test.dart
index 70c2dc3e..00888dc7 100644
--- a/test/di_test.dart
+++ b/test/di_test.dart
@@ -73,19 +73,19 @@ main() {
 
   test("make in route", () async {
     var response = await client.get("$url/errands3");
-    String text = await json.decode(response.body);
+    var text = await json.decode(response.body) as String;
     expect(text, equals(TEXT));
   });
 
   test("make in controller", () async {
     var response = await client.get("$url/errands4");
-    String text = await json.decode(response.body);
+    var text = await json.decode(response.body) as String;
     expect(text, equals(TEXT));
   });
 }
 
 void validateTodoSingleton(response) {
-  Map todo = json.decode(response.body.toString());
+  var todo = json.decode(response.body.toString()) as Map;
   expect(todo["id"], equals(null));
   expect(todo["text"], equals(TEXT));
   expect(todo["over"], equals(OVER));
diff --git a/test/hooked_test.dart b/test/hooked_test.dart
index bee62afb..a153ac29 100644
--- a/test/hooked_test.dart
+++ b/test/hooked_test.dart
@@ -77,7 +77,7 @@ main() {
         body: json.encode({"arbitrary": "data"}),
         headers: headers as Map<String, String>);
     print(response.body);
-    Map result = json.decode(response.body);
+    var result = json.decode(response.body) as Map;
     expect(result["hello"], equals("hooked world"));
   });
 
@@ -95,7 +95,7 @@ main() {
 
     var response = await client.get("$url/todos");
     print(response.body);
-    List result = json.decode(response.body);
+    var result = json.decode(response.body) as List;
     expect(result[0]["angel"], equals("framework"));
   });