diff --git a/pkgs/pubspec_parse/CHANGELOG.md b/pkgs/pubspec_parse/CHANGELOG.md
index 5aeb498020..5ead924a12 100644
--- a/pkgs/pubspec_parse/CHANGELOG.md
+++ b/pkgs/pubspec_parse/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.6.0-wip
+
+- Supports 'tag_pattern's via `GitDependency.tagPattern`.
+
 ## 1.5.0
 
 - Added fields to `Pubspec`: `executables`, `resolution`, `workspace`.
diff --git a/pkgs/pubspec_parse/lib/src/dependency.dart b/pkgs/pubspec_parse/lib/src/dependency.dart
index 24c65eac1c..093ce24fa4 100644
--- a/pkgs/pubspec_parse/lib/src/dependency.dart
+++ b/pkgs/pubspec_parse/lib/src/dependency.dart
@@ -75,7 +75,7 @@ Dependency? _fromJson(Object? data, String name) {
         final key = matchedKeys.single;
 
         return switch (key) {
-          'git' => GitDependency.fromData(data[key]),
+          'git' => GitDependency.fromJson(data),
           'path' => PathDependency.fromData(data[key]),
           'sdk' => _$SdkDependencyFromJson(data),
           'hosted' => _$HostedDependencyFromJson(data)
@@ -112,25 +112,65 @@ class SdkDependency extends Dependency {
   String toString() => 'SdkDependency: $sdk';
 }
 
-@JsonSerializable()
 class GitDependency extends Dependency {
   @JsonKey(fromJson: parseGitUri)
   final Uri url;
   final String? ref;
   final String? path;
-
-  GitDependency(this.url, {this.ref, this.path});
-
-  factory GitDependency.fromData(Object? data) {
-    if (data is String) {
-      data = {'url': data};
-    }
-
-    if (data is Map) {
-      return _$GitDependencyFromJson(data);
-    }
-
-    throw ArgumentError.value(data, 'git', 'Must be a String or a Map.');
+  final String? tagPattern;
+  final VersionConstraint? version;
+
+  GitDependency(this.url, {this.ref, this.path, this.tagPattern, this.version});
+
+  factory GitDependency.fromJson(Map data) {
+    final version = switch (data['version']) {
+      final String? s => _constraintFromString(s),
+      _ => throw ArgumentError.value(
+          data['version'],
+          'version',
+          'if present must be a string.',
+        ),
+    };
+    final gitData = switch (data['git']) {
+      final String s => {'url': s},
+      final Map m => m,
+      _ => throw ArgumentError.value(
+          data['git'],
+          'git',
+          'Must be a string or map.',
+        ),
+    };
+    final url = switch (gitData['url']) {
+      final String s => parseGitUri(s),
+      _ =>
+        throw ArgumentError.value(gitData['url'], 'url', 'Must be a String.'),
+    };
+    final ref = switch (gitData['ref']) {
+      final String? s => s,
+      _ =>
+        throw ArgumentError.value(gitData['ref'], 'ref', 'Must be a String.'),
+    };
+    final path = switch (gitData['path']) {
+      final String? s => s,
+      _ =>
+        throw ArgumentError.value(gitData['path'], 'path', 'Must be a String.'),
+    };
+    final tagPattern = switch (gitData['tag_pattern']) {
+      final String? s => s,
+      _ => throw ArgumentError.value(
+          gitData['tag_pattern'],
+          'tag_pattern',
+          'Must be a String.',
+        ),
+    };
+
+    return GitDependency(
+      url,
+      ref: ref,
+      path: path,
+      tagPattern: tagPattern,
+      version: version,
+    );
   }
 
   @override
diff --git a/pkgs/pubspec_parse/lib/src/dependency.g.dart b/pkgs/pubspec_parse/lib/src/dependency.g.dart
index 1a504f1fdf..11ce96af54 100644
--- a/pkgs/pubspec_parse/lib/src/dependency.g.dart
+++ b/pkgs/pubspec_parse/lib/src/dependency.g.dart
@@ -21,19 +21,6 @@ SdkDependency _$SdkDependencyFromJson(Map json) => $checkedCreate(
       },
     );
 
-GitDependency _$GitDependencyFromJson(Map json) => $checkedCreate(
-      'GitDependency',
-      json,
-      ($checkedConvert) {
-        final val = GitDependency(
-          $checkedConvert('url', (v) => parseGitUri(v as String)),
-          ref: $checkedConvert('ref', (v) => v as String?),
-          path: $checkedConvert('path', (v) => v as String?),
-        );
-        return val;
-      },
-    );
-
 HostedDependency _$HostedDependencyFromJson(Map json) => $checkedCreate(
       'HostedDependency',
       json,
diff --git a/pkgs/pubspec_parse/pubspec.yaml b/pkgs/pubspec_parse/pubspec.yaml
index 90741efffa..4a5f4568fa 100644
--- a/pkgs/pubspec_parse/pubspec.yaml
+++ b/pkgs/pubspec_parse/pubspec.yaml
@@ -1,5 +1,5 @@
 name: pubspec_parse
-version: 1.5.0
+version: 1.6.0-wip
 description: >-
   Simple package for parsing pubspec.yaml files with a type-safe API and rich
   error reporting.
diff --git a/pkgs/pubspec_parse/test/dependency_test.dart b/pkgs/pubspec_parse/test/dependency_test.dart
index f1e4f57760..6b4f3046ab 100644
--- a/pkgs/pubspec_parse/test/dependency_test.dart
+++ b/pkgs/pubspec_parse/test/dependency_test.dart
@@ -258,6 +258,25 @@ void _gitDependency() {
     expect(dep.toString(), 'GitDependency: url@url');
   });
 
+  test('tag_pattern works, and does not ignore version', () async {
+    final dep = await _dependency<GitDependency>(
+      {
+        'git': {
+          'url': 'url',
+          'tag_pattern': 'v{{version}}',
+        },
+        'version': '^1.2.3',
+      },
+      languageVersion: '3.9',
+    );
+    expect(dep.url.toString(), 'url');
+    expect(dep.path, isNull);
+    expect(dep.ref, isNull);
+    expect(dep.tagPattern, 'v{{version}}');
+    expect(dep.version.toString(), '^1.2.3');
+    expect(dep.toString(), 'GitDependency: url@url');
+  });
+
   test('string with user@ URL', () async {
     final skipTryParse = Platform.environment.containsKey('TRAVIS');
     if (skipTryParse) {
@@ -299,7 +318,7 @@ line 6, column 4: Unrecognized keys: [bob]; supported keys: [sdk, git, path, hos
     _expectThrows(
       {'git': null},
       r'''
-line 5, column 11: Unsupported value for "git". Must be a String or a Map.
+line 5, column 11: Unsupported value for "git". Must be a string or map.
   ╷
 5 │      "git": null
   │ ┌───────────^
@@ -313,7 +332,7 @@ line 5, column 11: Unsupported value for "git". Must be a String or a Map.
     _expectThrows(
       {'git': 42},
       r'''
-line 5, column 11: Unsupported value for "git". Must be a String or a Map.
+line 5, column 11: Unsupported value for "git". Must be a string or map.
   ╷
 5 │      "git": 42
   │ ┌───────────^
@@ -326,7 +345,7 @@ line 5, column 11: Unsupported value for "git". Must be a String or a Map.
   test('git - empty map', () {
     _expectThrowsContaining(
       {'git': <String, dynamic>{}},
-      r"type 'Null' is not a subtype of type 'String'",
+      r'Missing key "url". Must be a String',
     );
   });
 
@@ -335,7 +354,7 @@ line 5, column 11: Unsupported value for "git". Must be a String or a Map.
       {
         'git': {'url': null},
       },
-      r"type 'Null' is not a subtype of type 'String'",
+      r'Missing key "url". Must be a String',
     );
   });
 
@@ -344,7 +363,7 @@ line 5, column 11: Unsupported value for "git". Must be a String or a Map.
       {
         'git': {'url': 42},
       },
-      r"type 'int' is not a subtype of type 'String'",
+      r'Missing key "url". Must be a String',
     );
   });
 }
@@ -428,10 +447,11 @@ void _expectThrowsContaining(Object content, String errorText) {
 Future<T> _dependency<T extends Dependency>(
   Object? content, {
   bool skipTryPub = false,
+  String languageVersion = '2.12',
 }) async {
   final value = await parse(
     {
-      ...defaultPubspec,
+      ...defaultPubspec(languageVersion: languageVersion),
       'dependencies': {'dep': content},
     },
     skipTryPub: skipTryPub,
diff --git a/pkgs/pubspec_parse/test/parse_test.dart b/pkgs/pubspec_parse/test/parse_test.dart
index e0698af163..185a6e82ae 100644
--- a/pkgs/pubspec_parse/test/parse_test.dart
+++ b/pkgs/pubspec_parse/test/parse_test.dart
@@ -12,7 +12,7 @@ import 'test_utils.dart';
 
 void main() {
   test('minimal set values', () async {
-    final value = await parse(defaultPubspec);
+    final value = await parse(defaultPubspec());
     expect(value.name, 'sample');
     expect(value.version, isNull);
     expect(value.publishTo, isNull);
@@ -167,7 +167,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
     }.entries) {
       test('can be ${entry.key}', () async {
         final value = await parse({
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'publish_to': entry.value,
         });
         expect(value.publishTo, entry.value);
@@ -178,7 +178,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
   group('author, authors', () {
     test('one author', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'author': 'name@example.com',
       });
       expect(value.author, 'name@example.com');
@@ -187,7 +187,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
 
     test('one author, via authors', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'authors': ['name@example.com'],
       });
       expect(value.author, 'name@example.com');
@@ -196,7 +196,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
 
     test('many authors', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'authors': ['name@example.com', 'name2@example.com'],
       });
       expect(value.author, isNull);
@@ -205,7 +205,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
 
     test('author and authors', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'author': 'name@example.com',
         'authors': ['name2@example.com'],
       });
@@ -215,7 +215,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
 
     test('duplicate author values', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'author': 'name@example.com',
         'authors': ['name@example.com', 'name@example.com'],
       });
@@ -225,7 +225,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
 
     test('flutter', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'flutter': {'key': 'value'},
       });
       expect(value.flutter, {'key': 'value'});
@@ -235,7 +235,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
   group('executables', () {
     test('one executable', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'executables': {'my_script': 'bin/my_script.dart'},
       });
       expect(value.executables, hasLength(1));
@@ -245,7 +245,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
 
     test('many executables', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'executables': {
           'my_script': 'bin/my_script.dart',
           'my_script2': 'bin/my_script2.dart',
@@ -261,7 +261,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
     test('invalid value', () async {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'executables': {
             'script': 32,
           },
@@ -274,7 +274,7 @@ line 3, column 16: Unsupported value for "publish_to". Must be an http or https
     test('invalid executable - lenient', () async {
       final value = await parse(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'executables': 'Invalid value',
         },
         lenient: true,
@@ -407,7 +407,7 @@ line 4, column 10: Unsupported value for "sdk". Could not parse version "silly".
     test('bad repository url', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'repository': {'x': 'y'},
         },
         "Unsupported value for \"repository\". type 'YamlMap' is not a subtype of type 'String'",
@@ -431,7 +431,7 @@ line 4, column 10: Unsupported value for "sdk". Could not parse version "silly".
     test('not a list', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'funding': 1,
         },
         "Unsupported value for \"funding\". type 'int' is not a subtype of type 'List<dynamic>?'",
@@ -442,7 +442,7 @@ line 4, column 10: Unsupported value for "sdk". Could not parse version "silly".
     test('not an uri', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'funding': [1],
         },
         "Unsupported value for \"funding\". type 'int' is not a subtype of type 'String'",
@@ -453,7 +453,7 @@ line 4, column 10: Unsupported value for "sdk". Could not parse version "silly".
     test('not an uri', () {
       expectParseThrows(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'funding': ['ht tps://example.com/'],
         },
         r'''
@@ -472,7 +472,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
     test('not a list', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'topics': 1,
         },
         "Unsupported value for \"topics\". type 'int' is not a subtype of type 'List<dynamic>?'",
@@ -483,7 +483,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
     test('not a string', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'topics': [1],
         },
         "Unsupported value for \"topics\". type 'int' is not a subtype of type 'String'",
@@ -494,7 +494,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
     test('invalid data - lenient', () async {
       final value = await parse(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'topics': [1],
         },
         skipTryPub: true,
@@ -509,7 +509,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
     test('not a list', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'ignored_advisories': 1,
         },
         "Unsupported value for \"ignored_advisories\". type 'int' is not a subtype of type 'List<dynamic>?'",
@@ -520,7 +520,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
     test('not a string', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'ignored_advisories': [1],
         },
         "Unsupported value for \"ignored_advisories\". type 'int' is not a subtype of type 'String'",
@@ -531,7 +531,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
     test('invalid data - lenient', () async {
       final value = await parse(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'ignored_advisories': [1],
         },
         skipTryPub: true,
@@ -545,7 +545,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
   group('screenshots', () {
     test('one screenshot', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'screenshots': [
           {'description': 'my screenshot', 'path': 'path/to/screenshot'},
         ],
@@ -557,7 +557,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
 
     test('many screenshots', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'screenshots': [
           {'description': 'my screenshot', 'path': 'path/to/screenshot'},
           {
@@ -575,7 +575,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
 
     test('one screenshot plus invalid entries', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'screenshots': [
           42,
           {
@@ -593,7 +593,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
 
     test('invalid entries', () async {
       final value = await parse({
-        ...defaultPubspec,
+        ...defaultPubspec(),
         'screenshots': [
           42,
           'not a screenshot',
@@ -605,7 +605,7 @@ line 6, column 13: Unsupported value for "funding". Illegal scheme character at
     test('missing key `dessription', () {
       expectParseThrows(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'screenshots': [
             {'path': 'my/path'},
           ],
@@ -624,7 +624,7 @@ line 7, column 3: Missing key "description". Missing required key `description`
     test('missing key `path`', () {
       expectParseThrows(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'screenshots': [
             {'description': 'my screenshot'},
           ],
@@ -643,7 +643,7 @@ line 7, column 3: Missing key "path". Missing required key `path`
     test('Value of description not a String`', () {
       expectParseThrows(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'screenshots': [
             {'description': 42},
           ],
@@ -663,7 +663,7 @@ line 8, column 19: Unsupported value for "description". `42` is not a String
     test('Value of path not a String`', () {
       expectParseThrows(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'screenshots': [
             {
               'description': '',
@@ -686,7 +686,7 @@ line 9, column 12: Unsupported value for "path". `42` is not a String
     test('invalid screenshot - lenient', () async {
       final value = await parse(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'screenshots': 'Invalid value',
         },
         lenient: true,
@@ -734,7 +734,7 @@ line 1, column 1: Not a map
     test('bad repository url', () async {
       final value = await parse(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'repository': {'x': 'y'},
         },
         lenient: true,
@@ -746,7 +746,7 @@ line 1, column 1: Not a map
     test('bad issue_tracker url', () async {
       final value = await parse(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'issue_tracker': {'x': 'y'},
         },
         lenient: true,
@@ -758,7 +758,7 @@ line 1, column 1: Not a map
     test('multiple bad values', () async {
       final value = await parse(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'repository': {'x': 'y'},
           'issue_tracker': {'x': 'y'},
         },
@@ -793,7 +793,7 @@ line 1, column 1: Not a map
     test('workspace key must be a list', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'workspace': 42,
         },
         'Unsupported value for "workspace". type \'int\' is not a subtype of type \'List<dynamic>?\' in type cast',
@@ -804,7 +804,7 @@ line 1, column 1: Not a map
     test('workspace key must be a list of strings', () {
       expectParseThrowsContaining(
         {
-          ...defaultPubspec,
+          ...defaultPubspec(),
           'workspace': [42],
         },
         'Unsupported value for "workspace". type \'int\' is not a subtype of type \'String\' in type cast',
diff --git a/pkgs/pubspec_parse/test/test_utils.dart b/pkgs/pubspec_parse/test/test_utils.dart
index cc46522b7e..9b3179cd89 100644
--- a/pkgs/pubspec_parse/test/test_utils.dart
+++ b/pkgs/pubspec_parse/test/test_utils.dart
@@ -12,10 +12,10 @@ import 'package:test/test.dart';
 
 import 'pub_utils.dart';
 
-const defaultPubspec = {
-  'name': 'sample',
-  'environment': {'sdk': '>=2.12.0 <3.0.0'},
-};
+Map defaultPubspec({String? languageVersion = '2.12'}) => {
+      'name': 'sample',
+      'environment': {'sdk': '^$languageVersion.0'},
+    };
 
 String _encodeJson(Object? input) =>
     const JsonEncoder.withIndent(' ').convert(input);