diff --git a/example/analysis_options.yaml b/example/analysis_options.yaml
index dc3fca1..4924fdb 100644
--- a/example/analysis_options.yaml
+++ b/example/analysis_options.yaml
@@ -1,5 +1,9 @@
 include: package:lints/recommended.yaml
 
+analyzer:
+  enable-experiment:
+    - inline-class
+
 linter:
   rules:
     prefer_relative_imports: true
diff --git a/example/lib/runner.dart b/example/lib/runner.dart
index 24ad915..b49cdad 100644
--- a/example/lib/runner.dart
+++ b/example/lib/runner.dart
@@ -16,14 +16,11 @@ class GitRunner extends _$GitRunner {
     /// The name of the branch to be merged into the current branch.
     required String branch,
 
-    // /// Pass merge strategy specific option through to the merge strategy.
+    /// Pass merge strategy specific option through to the merge strategy.
     MergeStrategy strategy = MergeStrategy.ort,
 
     /// Perform the merge and commit the result.
-    @Flag() bool? commit,
-    @Option(hide: true, parser: specialDurationParser) Duration? uri,
-    @MultiOption(allowed: [1, 2, 3]) int? ff,
-    Set<int> someSet = const {1, 2, 3},
+    bool? commit,
   }) async {
     print('Merging branch $branch');
     if (commit == true) {
@@ -34,7 +31,3 @@ class GitRunner extends _$GitRunner {
 }
 
 enum MergeStrategy { ort, recursive, resolve, octopus, ours, subtree }
-
-Duration specialDurationParser(String input) {
-  return Duration(seconds: int.parse(input));
-}
diff --git a/example/lib/runner.g.dart b/example/lib/runner.g.dart
index a76b1fb..0474dd4 100644
--- a/example/lib/runner.g.dart
+++ b/example/lib/runner.g.dart
@@ -25,9 +25,6 @@ class MergeCommand extends Command {
     required String branch,
     MergeStrategy strategy,
     bool? commit,
-    Duration? uri,
-    int? ff,
-    Set<int> someSet,
   }) userMethod;
 
   @override
@@ -55,29 +52,7 @@ class MergeCommand extends Command {
         'subtree',
       ],
     )
-    ..addFlag('commit')
-    ..addOption(
-      'uri',
-      hide: true,
-      mandatory: false,
-    )
-    ..addOption(
-      'ff',
-      mandatory: false,
-      allowed: [
-        '1',
-        '2',
-        '3',
-      ],
-    )
-    ..addMultiOption(
-      'some-set',
-      defaultsTo: [
-        '1',
-        '2',
-        '3',
-      ],
-    );
+    ..addFlag('commit');
 
   @override
   Future<void> run() {
@@ -88,12 +63,6 @@ class MergeCommand extends Command {
           ? EnumParser(MergeStrategy.values).parse(results['strategy'])
           : MergeStrategy.ort,
       commit: results['commit'] != null ? results['commit'] : null,
-      uri:
-          results['uri'] != null ? specialDurationParser(results['uri']) : null,
-      ff: results['ff'] != null ? int.parse(results['ff']) : null,
-      someSet: results['some-set'] != null
-          ? List<String>.from(results['some-set']).map(int.parse).toSet()
-          : const {1, 2, 3},
     );
   }
 }
diff --git a/example/lib/stash.dart b/example/lib/stash.dart
index c7afdc5..978f8bd 100644
--- a/example/lib/stash.dart
+++ b/example/lib/stash.dart
@@ -13,7 +13,7 @@ class StashSubcommand extends _$StashSubcommand {
   @cliCommand
   Future<void> push(
     String message, {
-    @Option(help: 'Whether to include untracked files.', abbr: 'u')
+    /// Whether to include untracked files.
     bool includeUntracked = false,
   }) async {
     print('Stashing changes with message: $message');
diff --git a/example/lib/stash.g.dart b/example/lib/stash.g.dart
index 9381207..b810936 100644
--- a/example/lib/stash.g.dart
+++ b/example/lib/stash.g.dart
@@ -43,8 +43,6 @@ class PushCommand extends Command {
     )
     ..addFlag(
       'include-untracked',
-      abbr: 'u',
-      help: 'Whether to include untracked files.',
       defaultsTo: false,
     );
 
diff --git a/src/cli_gen/lib/src/analysis/parameters/type_parser_expression_builder.dart b/src/cli_gen/lib/src/analysis/parameters/type_parser_expression_builder.dart
index 0cd9f33..d130ca1 100644
--- a/src/cli_gen/lib/src/analysis/parameters/type_parser_expression_builder.dart
+++ b/src/cli_gen/lib/src/analysis/parameters/type_parser_expression_builder.dart
@@ -91,16 +91,17 @@ class TypeParserExpressionBuilder {
     // if the element is a extension type, get the extension type erasure
     // to get the underlying type, then get the corresponding parser
     // by calling `getParserForParameter` recursively.
-    final isExtensionType = paramType.extensionTypeErasure != paramType;
-    if (isExtensionType) {
-      // final erasure = type.extensionTypeErasure;
-      // return getParserForParameter(element, erasure);
-      throw InvalidGenerationSource(
-        'Extension types are not supported by `cli-gen` yet.',
-        element: element,
-        todo: 'Please use a supported type',
-      );
-    }
+    // final isExtensionType = paramType.extensionTypeErasure != paramType;
+    // if (isExtensionType) {
+    //   // example: if `FooExtensionType` has an actualType of `int`,
+    //   // then the parser would be `FooExtensionType.parse`.
+
+    //   // throw InvalidGenerationSource(
+    //   //   'Extension types are not supported by `cli-gen` yet.',
+    //   //   element: element,
+    //   //   todo: 'Please use a supported type',
+    //   // );
+    // }
 
     throw InvalidGenerationSource(
       '`${paramType.element!.name}` is not a supported type for arg parsing.',
diff --git a/src/cli_gen/lib/src/analysis/utils/get_parameter_ast_node.dart b/src/cli_gen/lib/src/analysis/utils/get_parameter_ast_node.dart
new file mode 100644
index 0000000..4dee7f3
--- /dev/null
+++ b/src/cli_gen/lib/src/analysis/utils/get_parameter_ast_node.dart
@@ -0,0 +1,18 @@
+import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/element/element.dart';
+import 'package:build/build.dart';
+import 'package:source_gen/source_gen.dart';
+
+extension ParameterAstNodeX on ParameterElement {
+  Future<FormalParameter> asAstNode(Resolver resolver) async {
+    final result = await resolver.astNodeFor(this);
+    if (result is! FormalParameter) {
+      throw InvalidGenerationSourceError(
+        'Expected a FormalParameter, but got $result',
+        element: this,
+      );
+    }
+
+    return result;
+  }
+}