diff --git a/.cirrus.yml b/.cirrus.yml
index 2433c6df473..9499f293b76 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -138,7 +138,7 @@ task:
     - name: docs-linux # linux-only
       environment:
         CPU: 4
-        MEMORY: 8G
+        MEMORY: 12G
       only_if: "$CIRRUS_PR != ''"
       script:
         - ./dev/bots/docs.sh
diff --git a/dartdoc_options.yaml b/dartdoc_options.yaml
index cbef352566d..d82f23c1efb 100644
--- a/dartdoc_options.yaml
+++ b/dartdoc_options.yaml
@@ -1,16 +1,17 @@
 # This file is used by dartdoc when generating API documentation for Flutter.
 dartdoc:
-  # Before you can run dartdoc, the snippets tool needs to have a snapshot built.
-  # The dev/tools/dartdoc.dart script does this automatically.
+  # Before you can run dartdoc, the snippets tool needs to be
+  # activated with "pub global activate snippets <version>"
+  # The dev/bots/docs.sh script does this automatically.
   tools:
     snippet:
-      command: ["dev/snippets/lib/main.dart", "--type=snippet"]
+      command: ["bin/cache/dart-sdk/bin/pub", "global", "run", "snippets", "--output-directory=doc/snippets", "--type=snippet"]
       description: "Creates sample code documentation output from embedded documentation samples."
     sample:
-      command: ["dev/snippets/lib/main.dart", "--type=sample"]
+      command: ["bin/cache/dart-sdk/bin/pub", "global", "run", "snippets", "--output-directory=doc/snippets", "--type=sample"]
       description: "Creates full application sample code documentation output from embedded documentation samples."
     dartpad:
-      command: ["dev/snippets/lib/main.dart", "--type=sample", "--dartpad"]
+      command: ["bin/cache/dart-sdk/bin/pub", "global", "run", "snippets", "--output-directory=doc/snippets", "--type=dartpad"]
       description: "Creates full application sample code documentation output from embedded documentation samples and displays it in an embedded DartPad."
   errors:
     # Default errors of dartdoc:
diff --git a/dev/bots/analyze_sample_code.dart b/dev/bots/analyze_sample_code.dart
index e82abedfb0a..beacde99b46 100644
--- a/dev/bots/analyze_sample_code.dart
+++ b/dev/bots/analyze_sample_code.dart
@@ -7,8 +7,10 @@
 // To run this, from the root of the Flutter repository:
 //   bin/cache/dart-sdk/bin/dart dev/bots/analyze_sample_code.dart
 
-// @dart= 2.12
+// @dart= 2.14
 
+import 'dart:async';
+import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
 
@@ -16,12 +18,22 @@ import 'package:args/args.dart';
 import 'package:path/path.dart' as path;
 import 'package:watcher/watcher.dart';
 
+// If you update this version, also update it in dev/bots/docs.sh
+const String _snippetsActivateVersion = '0.2.2';
+
 final String _flutterRoot = path.dirname(path.dirname(path.dirname(path.fromUri(Platform.script))));
 final String _defaultFlutterPackage = path.join(_flutterRoot, 'packages', 'flutter', 'lib');
 final String _defaultDartUiLocation = path.join(_flutterRoot, 'bin', 'cache', 'pkg', 'sky_engine', 'lib', 'ui');
 final String _flutter = path.join(_flutterRoot, 'bin', Platform.isWindows ? 'flutter.bat' : 'flutter');
 
-void main(List<String> arguments) {
+/// Finds the location of the pub executable, with the assumption that it is
+/// in the same location as the Dart executable used to run this script.
+String get _pubExecutable {
+  final File dartExecutable = File(Platform.resolvedExecutable);
+  return path.join(path.dirname(dartExecutable.absolute.path), Platform.isWindows ? 'pub.exe' : 'pub');
+}
+
+Future<void> main(List<String> arguments) async {
   final ArgParser argParser = ArgParser();
   argParser.addOption(
     'temp',
@@ -61,6 +73,13 @@ void main(List<String> arguments) {
     abbr: 'i',
     help: 'Analyzes the sample code in the specified file interactively.',
   );
+  argParser.addFlag(
+    'global-activate-snippets',
+    defaultsTo: true,
+    negatable: true,
+    help: 'Whether or not to "pub global activate" the snippets package. If set, will '
+          'activate version $_snippetsActivateVersion',
+  );
 
   final ArgResults parsedArguments = argParser.parse(arguments);
 
@@ -107,8 +126,25 @@ void main(List<String> arguments) {
     tempDirectory.createSync();
   }
 
+  if (parsedArguments['global-activate-snippets']! as bool) {
+    try {
+      Process.runSync(
+        _pubExecutable,
+        <String>[
+          'global',
+          'activate',
+          'snippets',
+          _snippetsActivateVersion,
+        ],
+        workingDirectory: _flutterRoot,
+      );
+    } on ProcessException catch (e) {
+      stderr.writeln('Unable to global activate snippets package at version $_snippetsActivateVersion: $e');
+      exit(1);
+    }
+  }
   if (parsedArguments['interactive'] != null) {
-    _runInteractive(
+    await _runInteractive(
       tempDir: tempDirectory,
       flutterPackage: flutterPackage,
       filePath: parsedArguments['interactive'] as String,
@@ -116,7 +152,7 @@ void main(List<String> arguments) {
     );
   } else {
     try {
-      exitCode = SampleChecker(
+      exitCode = await SampleChecker(
         flutterPackage,
         tempDirectory: tempDirectory,
         verbose: parsedArguments['verbose'] as bool,
@@ -129,6 +165,95 @@ void main(List<String> arguments) {
   }
 }
 
+typedef TaskQueueClosure<T> = Future<T> Function();
+
+class _TaskQueueItem<T> {
+  _TaskQueueItem(this._closure, this._completer, {this.onComplete});
+
+  final TaskQueueClosure<T> _closure;
+  final Completer<T> _completer;
+  void Function()? onComplete;
+
+  Future<void> run() async {
+    try {
+      _completer.complete(await _closure());
+    } catch (e) {
+      _completer.completeError(e);
+    } finally {
+      onComplete?.call();
+    }
+  }
+}
+
+/// A task queue of Futures to be completed in parallel, throttling
+/// the number of simultaneous tasks.
+///
+/// The tasks return results of type T.
+class TaskQueue<T> {
+  /// Creates a task queue with a maximum number of simultaneous jobs.
+  /// The [maxJobs] parameter defaults to the number of CPU cores on the
+  /// system.
+  TaskQueue({int? maxJobs})
+      : maxJobs = maxJobs ?? Platform.numberOfProcessors;
+
+  /// The maximum number of jobs that this queue will run simultaneously.
+  final int maxJobs;
+
+  final Queue<_TaskQueueItem<T>> _pendingTasks = Queue<_TaskQueueItem<T>>();
+  final Set<_TaskQueueItem<T>> _activeTasks = <_TaskQueueItem<T>>{};
+  final Set<Completer<void>> _completeListeners = <Completer<void>>{};
+
+  /// Returns a future that completes when all tasks in the [TaskQueue] are
+  /// complete.
+  Future<void> get tasksComplete {
+    // In case this is called when there are no tasks, we want it to
+    // signal complete immediately.
+    if (_activeTasks.isEmpty && _pendingTasks.isEmpty) {
+      return Future<void>.value();
+    }
+    final Completer<void> completer = Completer<void>();
+    _completeListeners.add(completer);
+    return completer.future;
+  }
+
+  /// Adds a single closure to the task queue, returning a future that
+  /// completes when the task completes.
+  Future<T> add(TaskQueueClosure<T> task) {
+    final Completer<T> completer = Completer<T>();
+    _pendingTasks.add(_TaskQueueItem<T>(task, completer));
+    if (_activeTasks.length < maxJobs) {
+      _processTask();
+    }
+    return completer.future;
+  }
+
+  // Process a single task.
+  void _processTask() {
+    if (_pendingTasks.isNotEmpty && _activeTasks.length <= maxJobs) {
+      final _TaskQueueItem<T> item = _pendingTasks.removeFirst();
+      _activeTasks.add(item);
+      item.onComplete = () {
+        _activeTasks.remove(item);
+        _processTask();
+      };
+      item.run();
+    } else {
+      _checkForCompletion();
+    }
+  }
+
+  void _checkForCompletion() {
+    if (_activeTasks.isEmpty && _pendingTasks.isEmpty) {
+      for (final Completer<void> completer in _completeListeners) {
+        if (!completer.isCompleted) {
+          completer.complete();
+        }
+      }
+      _completeListeners.clear();
+    }
+  }
+}
+
 class SampleCheckerException implements Exception {
   SampleCheckerException(this.message, {this.file, this.line});
   final String message;
@@ -147,6 +272,12 @@ class SampleCheckerException implements Exception {
   }
 }
 
+class AnalysisResult {
+  const AnalysisResult(this.exitCode, this.errors);
+  final int exitCode;
+  final Map<String, List<AnalysisError>> errors;
+}
+
 /// Checks samples and code snippets for analysis errors.
 ///
 /// Extracts dartdoc content from flutter package source code, identifies code
@@ -237,25 +368,6 @@ class SampleChecker {
   /// generate them.
   int _expressionId = 0;
 
-  /// The exit code from the analysis process.
-  int _exitCode = 0;
-
-  // Once the snippets tool has been precompiled by Dart, this contains the AOT
-  // snapshot.
-  String? _snippetsSnapshotPath;
-
-  /// Finds the location of the snippets script.
-  String get _snippetsExecutable {
-    final String platformScriptPath = path.dirname(path.fromUri(Platform.script));
-    return path.canonicalize(path.join(platformScriptPath, '..', 'snippets', 'lib', 'main.dart'));
-  }
-
-  /// Finds the location of the Dart executable.
-  String get _dartExecutable {
-    final File dartExecutable = File(Platform.resolvedExecutable);
-    return dartExecutable.absolute.path;
-  }
-
   static List<File> _listDartFiles(Directory directory, {bool recursive = false}) {
     return directory.listSync(recursive: recursive, followLinks: false).whereType<File>().where((File file) => path.extension(file.path) == '.dart').toList();
   }
@@ -282,9 +394,8 @@ class SampleChecker {
   List<Line>? _headers;
 
   /// Checks all the samples in the Dart files in [_flutterPackage] for errors.
-  int checkSamples() {
-    _exitCode = 0;
-    Map<String, List<AnalysisError>> errors = <String, List<AnalysisError>>{};
+  Future<int> checkSamples() async {
+    AnalysisResult? analysisResult;
     try {
       final Map<String, Section> sections = <String, Section>{};
       final Map<String, Sample> snippets = <String, Sample>{};
@@ -295,14 +406,14 @@ class SampleChecker {
         ..._listDartFiles(_flutterPackage, recursive: true),
         if (_dartUiLocation != null && _dartUiLocation!.existsSync()) ... _listDartFiles(_dartUiLocation!, recursive: true),
       ];
-      _extractSamples(filesToAnalyze, sectionMap: sections, sampleMap: snippets);
-      errors = _analyze(_tempDirectory, sections, snippets);
+      await _extractSamples(filesToAnalyze, sectionMap: sections, sampleMap: snippets);
+      analysisResult = _analyze(_tempDirectory, sections, snippets);
     } finally {
-      if (errors.isNotEmpty) {
-        for (final String filePath in errors.keys) {
-          errors[filePath]!.forEach(stderr.writeln);
+      if (analysisResult != null && analysisResult.errors.isNotEmpty) {
+        for (final String filePath in analysisResult.errors.keys) {
+          analysisResult.errors[filePath]!.forEach(stderr.writeln);
         }
-        stderr.writeln('\nFound ${errors.length} sample code errors.');
+        stderr.writeln('\nFound ${analysisResult.errors.length} sample code errors.');
       }
       if (_keepTmp) {
         print('Leaving temporary directory ${_tempDirectory.path} around for your perusal.');
@@ -313,15 +424,8 @@ class SampleChecker {
           stderr.writeln('Failed to delete ${_tempDirectory.path}: $e');
         }
       }
-      // If we made a snapshot, remove it (so as not to clutter up the tree).
-      if (_snippetsSnapshotPath != null) {
-        final File snapshot = File(_snippetsSnapshotPath!);
-        if (snapshot.existsSync()) {
-          snapshot.deleteSync();
-        }
-      }
     }
-    return _exitCode;
+    return analysisResult.exitCode;
   }
 
   /// Creates a name for the snippets tool to use for the snippet ID from a
@@ -333,37 +437,37 @@ class SampleChecker {
     return sampleId;
   }
 
-  // Precompiles the snippets tool if _snippetsSnapshotPath isn't set yet, and
-  // runs the precompiled version if it is set.
-  ProcessResult _runSnippetsScript(List<String> args) {
+  // The cached JSON Flutter version information from 'flutter --version --machine'.
+  String? _flutterVersion;
+
+  Future<ProcessResult> _runSnippetsScript(List<String> args) async {
     final String workingDirectory = path.join(_flutterRoot, 'dev', 'docs');
-    if (_snippetsSnapshotPath == null) {
-      _snippetsSnapshotPath = '$_snippetsExecutable.snapshot';
-      return Process.runSync(
-        _dartExecutable,
-        <String>[
-          '--snapshot=$_snippetsSnapshotPath',
-          '--snapshot-kind=app-jit',
-          path.canonicalize(_snippetsExecutable),
-          ...args,
-        ],
-        workingDirectory: workingDirectory,
-      );
-    } else {
-      return Process.runSync(
-        _dartExecutable,
-        <String>[
-          path.canonicalize(_snippetsSnapshotPath!),
-          ...args,
-        ],
-        workingDirectory: workingDirectory,
-      );
+    if (_flutterVersion == null) {
+      // Capture the flutter version information once so that the snippets tool doesn't
+      // have to run it for every snippet.
+      final ProcessResult versionResult = Process.runSync(_flutter, <String>['--version', '--machine']);
+      _flutterVersion = versionResult.stdout as String? ?? '';
     }
+    return Process.run(
+      _pubExecutable,
+      <String>[
+        'global',
+        'run',
+        'snippets',
+        ...args,
+      ],
+      workingDirectory: workingDirectory,
+      environment: <String, String>{
+        if (!Platform.environment.containsKey('FLUTTER_ROOT')) 'FLUTTER_ROOT': _flutterRoot,
+        if (_flutterVersion!.isNotEmpty) 'FLUTTER_VERSION': _flutterVersion!,
+      },
+      includeParentEnvironment: true,
+    );
   }
 
   /// Writes out the given sample to an output file in the [_tempDirectory] and
   /// returns the output file.
-  File _writeSample(Sample sample) {
+  Future<File> _writeSample(Sample sample) async {
     // Generate the snippet.
     final String sampleId = _createNameFromSource('sample', sample.start.filename, sample.start.line);
     final String inputName = '$sampleId.input';
@@ -374,11 +478,14 @@ class SampleChecker {
     final List<String> args = <String>[
       '--output=${outputFile.absolute.path}',
       '--input=${inputFile.absolute.path}',
+      // Formatting the output will fail on analysis errors, and we want it to fail
+      // here, not there.
+      '--no-format-output',
       ...sample.args,
     ];
     if (verbose)
       print('Generating sample for ${sample.start.filename}:${sample.start.line}');
-    final ProcessResult process = _runSnippetsScript(args);
+    final ProcessResult process = await _runSnippetsScript(args);
     if (verbose)
       stderr.write('${process.stderr}');
     if (process.exitCode != 0) {
@@ -394,12 +501,12 @@ class SampleChecker {
 
   /// Extracts the samples from the Dart files in [files], writes them
   /// to disk, and adds them to the appropriate [sectionMap] or [sampleMap].
-  void _extractSamples(
+  Future<void> _extractSamples(
     List<File> files, {
     required Map<String, Section> sectionMap,
     required Map<String, Sample> sampleMap,
     bool silent = false,
-  }) {
+  }) async {
     final List<Section> sections = <Section>[];
     final List<Sample> samples = <Sample>[];
     int dartpadCount = 0;
@@ -545,13 +652,19 @@ class SampleChecker {
       if (sectionMap != null)
         sectionMap[path] = section;
     }
+    final TaskQueue<File> sampleQueue = TaskQueue<File>();
     for (final Sample sample in samples) {
-      final File snippetFile = _writeSample(sample);
+      final Future<File> futureFile = sampleQueue.add(() => _writeSample(sample));
       if (sampleMap != null) {
-        sample.contents = snippetFile.readAsLinesSync();
-        sampleMap[snippetFile.absolute.path] = sample;
+        sampleQueue.add(() async {
+          final File snippetFile = await futureFile;
+          sample.contents = await snippetFile.readAsLines();
+          sampleMap[snippetFile.absolute.path] = sample;
+          return futureFile;
+        });
       }
     }
+    await sampleQueue.tasksComplete;
   }
 
   /// Helper to process arguments given as a (possibly quoted) string.
@@ -596,9 +709,11 @@ class SampleChecker {
   /// Creates the configuration files necessary for the analyzer to consider
   /// the temporary directory a package, and sets which lint rules to enforce.
   void _createConfigurationFiles(Directory directory) {
-    final File pubSpec = File(path.join(directory.path, 'pubspec.yaml'))..createSync(recursive: true);
+    final File pubSpec = File(path.join(directory.path, 'pubspec.yaml'));
+    if (!pubSpec.existsSync()) {
+      pubSpec.createSync(recursive: true);
 
-    pubSpec.writeAsStringSync('''
+      pubSpec.writeAsStringSync('''
 name: analyze_sample_code
 environment:
   sdk: ">=2.12.0-0 <3.0.0"
@@ -611,11 +726,13 @@ dependencies:
 dev_dependencies:
   flutter_lints: ^1.0.3
 ''');
-
+    }
 
     // Import the analysis options from the Flutter root.
     final File analysisOptions = File(path.join(directory.path, 'analysis_options.yaml'));
-    analysisOptions.writeAsStringSync('''
+    if (!analysisOptions.existsSync()) {
+      analysisOptions.createSync(recursive: true);
+      analysisOptions.writeAsStringSync('''
 include: package:flutter_lints/flutter.yaml
 
 linter:
@@ -623,6 +740,7 @@ linter:
     # Samples want to print things pretty often.
     avoid_print: false
 ''');
+    }
   }
 
   /// Writes out a sample section to the disk and returns the file.
@@ -641,7 +759,7 @@ linter:
   }
 
   /// Invokes the analyzer on the given [directory] and returns the stdout.
-  List<String> _runAnalyzer(Directory directory, {bool silent = true}) {
+  int _runAnalyzer(Directory directory, {bool silent = true, required List<String> output}) {
     if (!silent)
       print('Starting analysis of code samples.');
     _createConfigurationFiles(directory);
@@ -654,7 +772,8 @@ linter:
     final List<String> stdout = result.stdout.toString().trim().split('\n');
     // Remove output from building the flutter tool.
     stderr.removeWhere((String line) {
-      return line.startsWith('Building flutter tool...');
+      return line.startsWith('Building flutter tool...')
+          || line.startsWith('Waiting for another flutter command to release the startup lock...');
     });
     // Check out the stderr to see if the analyzer had it's own issues.
     if (stderr.isNotEmpty && stderr.first.contains(RegExp(r' issues? found\. \(ran in '))) {
@@ -672,19 +791,21 @@ linter:
     if (stdout.isNotEmpty && stdout.first.startsWith('Running "flutter pub get" in ')) {
       stdout.removeAt(0);
     }
-    _exitCode = result.exitCode;
-    return stdout;
+    output.addAll(stdout);
+    return result.exitCode;
   }
 
   /// Starts the analysis phase of checking the samples by invoking the analyzer
   /// and parsing its output to create a map of filename to [AnalysisError]s.
-  Map<String, List<AnalysisError>> _analyze(
+  AnalysisResult _analyze(
     Directory directory,
     Map<String, Section> sections,
     Map<String, Sample> samples, {
     bool silent = false,
   }) {
-    final List<String> errors = _runAnalyzer(directory, silent: silent);
+    final List<String> errors = <String>[];
+    int exitCode = _runAnalyzer(directory, silent: silent, output: errors);
+
     final Map<String, List<AnalysisError>> analysisErrors = <String, List<AnalysisError>>{};
     void addAnalysisError(File file, AnalysisError error) {
       if (analysisErrors.containsKey(file.path)) {
@@ -825,15 +946,15 @@ linter:
         );
       }
     }
-    if (_exitCode == 1 && analysisErrors.isEmpty && !unknownAnalyzerErrors) {
-      _exitCode = 0;
+    if (exitCode == 1 && analysisErrors.isEmpty && !unknownAnalyzerErrors) {
+      exitCode = 0;
     }
-    if (_exitCode == 0) {
+    if (exitCode == 0) {
       if (!silent)
         print('No analysis errors in samples!');
       assert(analysisErrors.isEmpty);
     }
-    return analysisErrors;
+    return AnalysisResult(exitCode, analysisErrors);
   }
 
   /// Process one block of sample code (the part inside of "```" markers).
@@ -1070,17 +1191,17 @@ Future<void> _runInteractive({
   }
   print('Starting up in interactive mode on ${path.relative(filePath, from: _flutterRoot)} ...');
 
-  void analyze(SampleChecker checker, File file) {
+  Future<void> analyze(SampleChecker checker, File file) async {
     final Map<String, Section> sections = <String, Section>{};
     final Map<String, Sample> snippets = <String, Sample>{};
-    checker._extractSamples(<File>[file], silent: true, sectionMap: sections, sampleMap: snippets);
-    final Map<String, List<AnalysisError>> errors = checker._analyze(checker._tempDirectory, sections, snippets, silent: true);
+    await checker._extractSamples(<File>[file], silent: true, sectionMap: sections, sampleMap: snippets);
+    final AnalysisResult analysisResult = checker._analyze(checker._tempDirectory, sections, snippets, silent: true);
     stderr.writeln('\u001B[2J\u001B[H'); // Clears the old results from the terminal.
-    if (errors.isNotEmpty) {
-      for (final String filePath in errors.keys) {
-        errors[filePath]!.forEach(stderr.writeln);
+    if (analysisResult.errors.isNotEmpty) {
+      for (final String filePath in analysisResult.errors.keys) {
+        analysisResult.errors[filePath]!.forEach(stderr.writeln);
       }
-      stderr.writeln('\nFound ${errors.length} errors.');
+      stderr.writeln('\nFound ${analysisResult.errors.length} errors.');
     } else {
       stderr.writeln('\nNo issues found.');
     }
@@ -1088,7 +1209,7 @@ Future<void> _runInteractive({
 
   final SampleChecker checker = SampleChecker(flutterPackage, tempDirectory: tempDir)
     .._createConfigurationFiles(tempDir);
-  analyze(checker, file);
+  await analyze(checker, file);
 
   print('Type "q" to quit, or "r" to delete temp dir and manually reload.');
 
diff --git a/dev/bots/docs.sh b/dev/bots/docs.sh
index 6ef62ccf72f..ad182366500 100755
--- a/dev/bots/docs.sh
+++ b/dev/bots/docs.sh
@@ -13,14 +13,26 @@ function script_location() {
     script_location="$(readlink "$script_location")"
     [[ "$script_location" != /* ]] && script_location="$DIR/$script_location"
   done
-  echo "$(cd -P "$(dirname "$script_location")" >/dev/null && pwd)"
+  cd -P "$(dirname "$script_location")" >/dev/null && pwd
 }
 
 function generate_docs() {
     # Install and activate dartdoc.
     # NOTE: When updating to a new dartdoc version, please also update
     # `dartdoc_options.yaml` to include newly introduced error and warning types.
-    "$PUB" global activate dartdoc 1.0.0
+    "$PUB" global activate dartdoc 1.0.2
+
+    # Install and activate the snippets tool, which resides in the
+    # assets-for-api-docs repo:
+    # https://github.com/flutter/assets-for-api-docs/tree/master/packages/snippets
+    # >>> If you update this version, also update it in dev/bots/analyze_sample_code.dart <<<
+    "$PUB" global activate snippets 0.2.2
+
+    # Install and activate the snippets tool, which resides in the
+    # assets-for-api-docs repo:
+    # https://github.com/flutter/assets-for-api-docs/tree/master/packages/snippets
+    # >>> If you update this version, also update it in dev/bots/analyze_sample_code.dart <<<
+    "$PUB" global activate snippets 0.2.1
 
     # This script generates a unified doc set, and creates
     # a custom index.html, placing everything into dev/docs/doc.
@@ -96,9 +108,9 @@ function move_offline_into_place() {
   mv flutter.docs.zip doc/offline/flutter.docs.zip
   du -sh doc/offline/flutter.docs.zip
   if [[ "$LUCI_BRANCH" == "stable" ]]; then
-    echo -e "<entry>\n  <version>${FLUTTER_VERSION}</version>\n  <url>https://api.flutter.dev/offline/flutter.docset.tar.gz</url>\n</entry>" > doc/offline/flutter.xml
+    echo -e "<entry>\n  <version>${FLUTTER_VERSION_STRING}</version>\n  <url>https://api.flutter.dev/offline/flutter.docset.tar.gz</url>\n</entry>" > doc/offline/flutter.xml
   else
-    echo -e "<entry>\n  <version>${FLUTTER_VERSION}</version>\n  <url>https://master-api.flutter.dev/offline/flutter.docset.tar.gz</url>\n</entry>" > doc/offline/flutter.xml
+    echo -e "<entry>\n  <version>${FLUTTER_VERSION_STRING}</version>\n  <url>https://master-api.flutter.dev/offline/flutter.docset.tar.gz</url>\n</entry>" > doc/offline/flutter.xml
   fi
   mv flutter.docset.tar.gz doc/offline/flutter.docset.tar.gz
   du -sh doc/offline/flutter.docset.tar.gz
@@ -125,9 +137,11 @@ DART="$DART_BIN/dart"
 PUB="$DART_BIN/pub"
 export PATH="$FLUTTER_BIN:$DART_BIN:$PATH"
 
-# Make sure dart is installed by invoking flutter to download it.
-"$FLUTTER" --version
-FLUTTER_VERSION=$(cat "$FLUTTER_ROOT/version")
+# Make sure dart is installed by invoking Flutter to download it.
+# This also creates the 'version' file.
+FLUTTER_VERSION=$("$FLUTTER" --version --machine)
+export FLUTTER_VERSION
+FLUTTER_VERSION_STRING=$(cat "$FLUTTER_ROOT/version")
 
 # If the pub cache directory exists in the root, then use that.
 FLUTTER_PUB_CACHE="$FLUTTER_ROOT/.pub-cache"
diff --git a/dev/bots/test.dart b/dev/bots/test.dart
index 2c8348d277d..554c4340c5c 100644
--- a/dev/bots/test.dart
+++ b/dev/bots/test.dart
@@ -746,7 +746,6 @@ Future<void> _runFrameworkTests() async {
     print('${green}Running package tests$reset for directories other than packages/flutter');
     await _pubRunTest(path.join(flutterRoot, 'dev', 'bots'));
     await _pubRunTest(path.join(flutterRoot, 'dev', 'devicelab'), ensurePrecompiledTool: false); // See https://github.com/flutter/flutter/issues/86209
-    await _pubRunTest(path.join(flutterRoot, 'dev', 'snippets'));
     // TODO(fujino): Move this to its own test shard
     await _pubRunTest(path.join(flutterRoot, 'dev', 'conductor'), forceSingleCore: true);
     await _runFlutterTest(path.join(flutterRoot, 'dev', 'integration_tests', 'android_semantics_testing'));
diff --git a/dev/bots/test/analyze-sample-code-test-dart-ui/ui.dart b/dev/bots/test/analyze-sample-code-test-dart-ui/ui.dart
index ba5a55590d4..5b0239d16df 100644
--- a/dev/bots/test/analyze-sample-code-test-dart-ui/ui.dart
+++ b/dev/bots/test/analyze-sample-code-test-dart-ui/ui.dart
@@ -11,11 +11,13 @@ library dart.ui;
 /// Annotation used by Flutter's Dart compiler to indicate that an
 /// [Object.toString] override should not be replaced with a supercall.
 ///
-/// {@tool sample}
+/// {@tool sample --template=stateless_widget_material}
 /// A sample if using keepToString to prevent replacement by a supercall.
 ///
 /// ```dart
 /// class MyStringBuffer {
+///   error;
+///
 ///   StringBuffer _buffer = StringBuffer();
 ///
 ///   @keepToString
diff --git a/dev/bots/test/analyze_sample_code_test.dart b/dev/bots/test/analyze_sample_code_test.dart
index 98d90441c01..4f7b32a33ac 100644
--- a/dev/bots/test/analyze_sample_code_test.dart
+++ b/dev/bots/test/analyze_sample_code_test.dart
@@ -20,11 +20,10 @@ void main() {
       <String>['analyze_sample_code.dart', '--no-include-dart-ui', 'test/analyze-sample-code-test-input'],
     );
     final List<String> stdoutLines = process.stdout.toString().split('\n');
-    final List<String> stderrLines = process.stderr.toString().split('\n')
-      ..removeWhere((String line) => line.startsWith('Analyzer output:') || line.startsWith('Building flutter tool...'));
+    final List<String> stderrLines = process.stderr.toString().split('\n');
     expect(process.exitCode, isNot(equals(0)));
-    expect(stderrLines, <String>[
-      'In sample starting at dev/bots/test/analyze-sample-code-test-input/known_broken_documentation.dart:125:      child: Text(title),',
+    expect(stderrLines, containsAll(<String>[
+      'In sample starting at dev/bots/test/analyze-sample-code-test-input/known_broken_documentation.dart:125:    child: Text(title),',
       ">>> error: The final variable 'title' can't be read because it is potentially unassigned at this point (read_potentially_unassigned_final)",
       'dev/bots/test/analyze-sample-code-test-input/known_broken_documentation.dart:30:9: new Opacity(',
       '>>> info: Unnecessary new keyword (unnecessary_new)',
@@ -38,32 +37,35 @@ void main() {
       ">>> error: A value of type 'Null' can't be assigned to a variable of type 'int' (invalid_assignment)",
       'dev/bots/test/analyze-sample-code-test-input/known_broken_documentation.dart:120:24: const SizedBox(),',
       '>>> error: Unexpected comma at end of sample code. (missing_identifier)',
-      '',
       'Found 2 sample code errors.',
-      ''
-    ]);
-    expect(stdoutLines, <String>[
+    ]));
+    expect(stdoutLines, containsAll(<String>[
       'Found 9 snippet code blocks, 0 sample code sections, and 2 dartpad sections.',
       'Starting analysis of code samples.',
-      '',
-    ]);
+    ]));
   });
   test('Analyzes dart:ui code', () {
     final ProcessResult process = Process.runSync(
       '../../bin/cache/dart-sdk/bin/dart',
       <String>[
         'analyze_sample_code.dart',
-        '--dart-ui-location',
-        'test/analyze-sample-code-test-dart-ui',
+        '--dart-ui-location=test/analyze-sample-code-test-dart-ui',
         'test/analyze-sample-code-test-input',
       ],
     );
     final List<String> stdoutLines = process.stdout.toString().split('\n');
+    final List<String> stderrLines = process.stderr.toString().split('\n');
     expect(process.exitCode, isNot(equals(0)));
-    expect(stdoutLines, equals(<String>[
+    expect(stderrLines, containsAll(<String>[
+      'In sample starting at dev/bots/test/analyze-sample-code-test-dart-ui/ui.dart:15:class MyStatelessWidget extends StatelessWidget {',
+      ">>> error: Missing concrete implementation of 'StatelessWidget.build' (non_abstract_class_inherits_abstract_member)",
+      'In sample starting at dev/bots/test/analyze-sample-code-test-dart-ui/ui.dart:15:class MyStringBuffer {',
+      ">>> error: Classes can't be declared inside other classes (class_in_class)",
+    ]));
+    expect(stdoutLines, containsAll(<String>[
       // There is one sample code section in the test's dummy dart:ui code.
       'Found 9 snippet code blocks, 1 sample code sections, and 2 dartpad sections.',
-      '',
+      'Starting analysis of code samples.',
     ]));
   });
 }
diff --git a/dev/snippets/config/skeletons/dartpad-sample.html b/dev/snippets/config/skeletons/dartpad-sample.html
index ad850a084a8..8cbd443846d 100644
--- a/dev/snippets/config/skeletons/dartpad-sample.html
+++ b/dev/snippets/config/skeletons/dartpad-sample.html
@@ -8,18 +8,6 @@
         <i class="material-icons copy-image">link</i>
     </a>
 </div>
-<div class="snippet-buttons">
-    <script>var visibleSnippet{{serial}} = "longSnippet{{serial}}";</script>
-    <button id="longSnippet{{serial}}Button"
-            onclick="visibleSnippet{{serial}} = showSnippet('longSnippet{{serial}}', visibleSnippet{{serial}});"
-            selected>
-        Interactive App
-    </button>
-    <button id="shortSnippet{{serial}}Button"
-            onclick="visibleSnippet{{serial}} = showSnippet('shortSnippet{{serial}}', visibleSnippet{{serial}});">
-        Sample code
-    </button>
-</div>
 <div class="snippet-container">
     <div class="snippet" id="longSnippet{{serial}}">
         {{description}}
@@ -28,15 +16,5 @@
             <span class="snippet-create-command">flutter create --sample={{id}} mysample</span>
         </div>
     </div>
-    <div class="snippet" id="shortSnippet{{serial}}" hidden>
-        {{description}}
-        <div class="copyable-container">
-            <button class="copy-button-overlay copy-button" title="Copy to clipboard"
-                    onclick="copyTextToClipboard(visibleSnippet{{serial}});">
-                <i class="material-icons copy-image">assignment</i>
-            </button>
-            <pre class="language-{{language}}"><code class="language-{{language}}">{{code}}</code></pre>
-        </div>
-    </div>
 </div>
 {@end-inject-html}
diff --git a/dev/snippets/config/skeletons/snippet.html b/dev/snippets/config/skeletons/snippet.html
index 75f87824e4e..99574b028b8 100644
--- a/dev/snippets/config/skeletons/snippet.html
+++ b/dev/snippets/config/skeletons/snippet.html
@@ -8,9 +8,6 @@
     <i class="material-icons copy-image">link</i>
   </a>
 </div>
-<div class="snippet-buttons">
-  <button id="shortSnippet{{serial}}Button" selected>Sample</button>
-</div>
 <div class="snippet-container">
   <div class="snippet">{{description}}
     <div class="copyable-container">
diff --git a/dev/snippets/config/templates/freeform.tmpl b/dev/snippets/config/templates/freeform.tmpl
index 1337bd4b585..ea4f7f08180 100644
--- a/dev/snippets/config/templates/freeform.tmpl
+++ b/dev/snippets/config/templates/freeform.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
diff --git a/dev/snippets/config/templates/stateful_widget.tmpl b/dev/snippets/config/templates/stateful_widget.tmpl
index db4472249f8..014f618e6d1 100644
--- a/dev/snippets/config/templates/stateful_widget.tmpl
+++ b/dev/snippets/config/templates/stateful_widget.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -35,5 +35,5 @@ class MyStatefulWidget extends StatefulWidget {
 
 /// This is the private State class that goes with MyStatefulWidget.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_cupertino.tmpl b/dev/snippets/config/templates/stateful_widget_cupertino.tmpl
index a07430d9eb3..e424cddcb3c 100644
--- a/dev/snippets/config/templates/stateful_widget_cupertino.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_cupertino.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -36,5 +36,5 @@ class MyStatefulWidget extends StatefulWidget {
 
 /// This is the private State class that goes with MyStatefulWidget.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_cupertino_page_scaffold.tmpl b/dev/snippets/config/templates/stateful_widget_cupertino_page_scaffold.tmpl
index 509b2558b0b..905f4da4d5c 100644
--- a/dev/snippets/config/templates/stateful_widget_cupertino_page_scaffold.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_cupertino_page_scaffold.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -39,5 +39,5 @@ class MyStatefulWidget extends StatefulWidget {
 
 /// This is the private State class that goes with MyStatefulWidget.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_cupertino_ticker.tmpl b/dev/snippets/config/templates/stateful_widget_cupertino_ticker.tmpl
index 32262d67fe8..38c75479831 100644
--- a/dev/snippets/config/templates/stateful_widget_cupertino_ticker.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_cupertino_ticker.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -37,5 +37,5 @@ class MyStatefulWidget extends StatefulWidget {
 /// This is the private State class that goes with MyStatefulWidget.
 /// AnimationControllers can be created with `vsync: this` because of TickerProviderStateMixin.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> with TickerProviderStateMixin {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_material.tmpl b/dev/snippets/config/templates/stateful_widget_material.tmpl
index 233bbc9769c..fe916062875 100644
--- a/dev/snippets/config/templates/stateful_widget_material.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_material.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -36,5 +36,5 @@ class MyStatefulWidget extends StatefulWidget {
 
 /// This is the private State class that goes with MyStatefulWidget.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_material_ticker.tmpl b/dev/snippets/config/templates/stateful_widget_material_ticker.tmpl
index 02f2e2047e3..0357ff41a8b 100644
--- a/dev/snippets/config/templates/stateful_widget_material_ticker.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_material_ticker.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -37,5 +37,5 @@ class MyStatefulWidget extends StatefulWidget {
 /// This is the private State class that goes with MyStatefulWidget.
 /// AnimationControllers can be created with `vsync: this` because of TickerProviderStateMixin.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> with TickerProviderStateMixin {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_restoration.tmpl b/dev/snippets/config/templates/stateful_widget_restoration.tmpl
index 05c7c1ba354..405a9b6629c 100644
--- a/dev/snippets/config/templates/stateful_widget_restoration.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_restoration.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
diff --git a/dev/snippets/config/templates/stateful_widget_restoration_cupertino.tmpl b/dev/snippets/config/templates/stateful_widget_restoration_cupertino.tmpl
index d7267f3d2d2..3435e8c2a00 100644
--- a/dev/snippets/config/templates/stateful_widget_restoration_cupertino.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_restoration_cupertino.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
diff --git a/dev/snippets/config/templates/stateful_widget_restoration_material.tmpl b/dev/snippets/config/templates/stateful_widget_restoration_material.tmpl
index 5d3fc3c95bd..11045ab5926 100644
--- a/dev/snippets/config/templates/stateful_widget_restoration_material.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_restoration_material.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
diff --git a/dev/snippets/config/templates/stateful_widget_scaffold.tmpl b/dev/snippets/config/templates/stateful_widget_scaffold.tmpl
index b7b6ccb542d..bfc77b006e7 100644
--- a/dev/snippets/config/templates/stateful_widget_scaffold.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_scaffold.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -39,5 +39,5 @@ class MyStatefulWidget extends StatefulWidget {
 
 /// This is the private State class that goes with MyStatefulWidget.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_scaffold_center.tmpl b/dev/snippets/config/templates/stateful_widget_scaffold_center.tmpl
index 16191373dfb..bd6bc66b512 100644
--- a/dev/snippets/config/templates/stateful_widget_scaffold_center.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_scaffold_center.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -41,5 +41,5 @@ class MyStatefulWidget extends StatefulWidget {
 
 /// This is the private State class that goes with MyStatefulWidget.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateful_widget_scaffold_center_freeform_state.tmpl b/dev/snippets/config/templates/stateful_widget_scaffold_center_freeform_state.tmpl
index 4f05456dea1..1659319c4f3 100644
--- a/dev/snippets/config/templates/stateful_widget_scaffold_center_freeform_state.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_scaffold_center_freeform_state.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
diff --git a/dev/snippets/config/templates/stateful_widget_ticker.tmpl b/dev/snippets/config/templates/stateful_widget_ticker.tmpl
index de5daeacf09..ced2116ed56 100644
--- a/dev/snippets/config/templates/stateful_widget_ticker.tmpl
+++ b/dev/snippets/config/templates/stateful_widget_ticker.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -36,5 +36,5 @@ class MyStatefulWidget extends StatefulWidget {
 /// This is the private State class that goes with MyStatefulWidget.
 /// AnimationControllers can be created with `vsync: this` because of TickerProviderStateMixin.
 class _MyStatefulWidgetState extends State<MyStatefulWidget> with TickerProviderStateMixin {
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget.tmpl b/dev/snippets/config/templates/stateless_widget.tmpl
index fa5c4a848d1..c04e577423c 100644
--- a/dev/snippets/config/templates/stateless_widget.tmpl
+++ b/dev/snippets/config/templates/stateless_widget.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -30,5 +30,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget_cupertino.tmpl b/dev/snippets/config/templates/stateless_widget_cupertino.tmpl
index 7d116d09584..9eec7767482 100644
--- a/dev/snippets/config/templates/stateless_widget_cupertino.tmpl
+++ b/dev/snippets/config/templates/stateless_widget_cupertino.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -32,5 +32,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget_cupertino_page_scaffold.tmpl b/dev/snippets/config/templates/stateless_widget_cupertino_page_scaffold.tmpl
index ffa71d0784a..dd4552a82a7 100644
--- a/dev/snippets/config/templates/stateless_widget_cupertino_page_scaffold.tmpl
+++ b/dev/snippets/config/templates/stateless_widget_cupertino_page_scaffold.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -35,5 +35,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget_material.tmpl b/dev/snippets/config/templates/stateless_widget_material.tmpl
index ef408dfd209..dc5e7a3c6dd 100644
--- a/dev/snippets/config/templates/stateless_widget_material.tmpl
+++ b/dev/snippets/config/templates/stateless_widget_material.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -32,5 +32,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget_restoration_cupertino.tmpl b/dev/snippets/config/templates/stateless_widget_restoration_cupertino.tmpl
index 5e2a6e13c1b..975654ac96d 100644
--- a/dev/snippets/config/templates/stateless_widget_restoration_cupertino.tmpl
+++ b/dev/snippets/config/templates/stateless_widget_restoration_cupertino.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -32,5 +32,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget_restoration_material.tmpl b/dev/snippets/config/templates/stateless_widget_restoration_material.tmpl
index 2d936ef3478..5e34280dbd1 100644
--- a/dev/snippets/config/templates/stateless_widget_restoration_material.tmpl
+++ b/dev/snippets/config/templates/stateless_widget_restoration_material.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -32,5 +32,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget_scaffold.tmpl b/dev/snippets/config/templates/stateless_widget_scaffold.tmpl
index a79807efe05..834656e3487 100644
--- a/dev/snippets/config/templates/stateless_widget_scaffold.tmpl
+++ b/dev/snippets/config/templates/stateless_widget_scaffold.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -35,5 +35,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/config/templates/stateless_widget_scaffold_center.tmpl b/dev/snippets/config/templates/stateless_widget_scaffold_center.tmpl
index f3d24395894..85eb7a56ed1 100644
--- a/dev/snippets/config/templates/stateless_widget_scaffold_center.tmpl
+++ b/dev/snippets/config/templates/stateless_widget_scaffold_center.tmpl
@@ -1,5 +1,5 @@
-/// Flutter code sample for {{element}}
-
+// Flutter code sample for {{element}}
+//
 {{description}}
 
 {{code-dartImports}}
@@ -37,5 +37,5 @@ class MyStatelessWidget extends StatelessWidget {
   const MyStatelessWidget({Key? key}) : super(key: key);
 
   @override
-  {{code}}
+{{code}}
 }
diff --git a/dev/snippets/lib/configuration.dart b/dev/snippets/lib/configuration.dart
deleted file mode 100644
index d3729ba4c22..00000000000
--- a/dev/snippets/lib/configuration.dart
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:io' hide Platform;
-
-import 'package:meta/meta.dart';
-import 'package:path/path.dart' as path;
-
-/// What type of snippet to produce.
-enum SnippetType {
-  /// Produces a snippet that includes the code interpolated into an application
-  /// template.
-  sample,
-
-  /// Produces a nicely formatted sample code, but no application.
-  snippet,
-}
-
-/// Return the name of an enum item.
-String getEnumName(dynamic enumItem) {
-  final String name = '$enumItem';
-  final int index = name.indexOf('.');
-  return index == -1 ? name : name.substring(index + 1);
-}
-
-/// A class to compute the configuration of the snippets input and output
-/// locations based in the current location of the snippets main.dart.
-class Configuration {
-  Configuration({required this.flutterRoot}) : assert(flutterRoot != null);
-
-  final Directory flutterRoot;
-
-  /// This is the configuration directory for the snippets system, containing
-  /// the skeletons and templates.
-  @visibleForTesting
-  Directory get configDirectory {
-    _configPath ??= Directory(
-        path.canonicalize(path.join(flutterRoot.absolute.path, 'dev', 'snippets', 'config')));
-    return _configPath!;
-  }
-
-  // Nullable so that we can use it as a lazy cache.
-  Directory? _configPath;
-
-  /// This is where the snippets themselves will be written, in order to be
-  /// uploaded to the docs site.
-  Directory get outputDirectory {
-    _docsDirectory ??= Directory(
-        path.canonicalize(path.join(flutterRoot.absolute.path, 'dev', 'docs', 'doc', 'snippets')));
-    return _docsDirectory!;
-  }
-
-  // Nullable so that we can use it as a lazy cache.
-  Directory? _docsDirectory;
-
-  /// This makes sure that the output directory exists.
-  void createOutputDirectory() {
-    if (!outputDirectory.existsSync()) {
-      outputDirectory.createSync(recursive: true);
-    }
-  }
-
-  /// The directory containing the HTML skeletons to be filled out with metadata
-  /// and returned to dartdoc for insertion in the output.
-  Directory get skeletonsDirectory => Directory(path.join(configDirectory.path,'skeletons'));
-
-  /// The directory containing the code templates that can be referenced by the
-  /// dartdoc.
-  Directory get templatesDirectory => Directory(path.join(configDirectory.path, 'templates'));
-
-  /// Gets the skeleton file to use for the given [SnippetType] and DartPad preference.
-  File getHtmlSkeletonFile(SnippetType type, {bool showDartPad = false}) {
-    assert(!showDartPad || type == SnippetType.sample,
-        'Only application snippets work with dartpad.');
-    final String filename =
-        '${showDartPad ? 'dartpad-' : ''}${getEnumName(type)}.html';
-    return File(path.join(skeletonsDirectory.path, filename));
-  }
-}
diff --git a/dev/snippets/lib/main.dart b/dev/snippets/lib/main.dart
deleted file mode 100644
index 6fa01276980..00000000000
--- a/dev/snippets/lib/main.dart
+++ /dev/null
@@ -1,241 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:io' show exit, stderr, stdout, File, ProcessResult;
-
-import 'package:args/args.dart';
-import 'package:meta/meta.dart';
-import 'package:path/path.dart' as path;
-import 'package:platform/platform.dart';
-import 'package:process/process.dart';
-
-import 'configuration.dart';
-import 'snippets.dart';
-
-const String _kSerialOption = 'serial';
-const String _kElementOption = 'element';
-const String _kHelpOption = 'help';
-const String _kInputOption = 'input';
-const String _kLibraryOption = 'library';
-const String _kOutputOption = 'output';
-const String _kPackageOption = 'package';
-const String _kTemplateOption = 'template';
-const String _kTypeOption = 'type';
-const String _kShowDartPad = 'dartpad';
-
-class GitStatusFailed implements Exception {
-  GitStatusFailed(this.gitResult);
-
-  final ProcessResult gitResult;
-
-  @override
-  String toString() => 'git status exited with a non-zero exit code: ${gitResult.exitCode}:\n${gitResult.stderr}\n${gitResult.stdout}';
-}
-
-/// Get the name of the channel these docs are from.
-///
-/// First check env variable LUCI_BRANCH, then refer to the currently
-/// checked out git branch.
-String getChannelName({
-  @visibleForTesting
-  Platform platform = const LocalPlatform(),
-  @visibleForTesting
-  ProcessManager processManager = const LocalProcessManager(),
-}) {
-  final String? envReleaseChannel = platform.environment['LUCI_BRANCH']?.trim();
-  if (<String>['master', 'stable'].contains(envReleaseChannel)) {
-    return envReleaseChannel!;
-  }
-  final RegExp gitBranchRegexp = RegExp(r'^## (?<branch>.*)');
-  final ProcessResult gitResult = processManager.runSync(<String>['git', 'status', '-b', '--porcelain'],
-    environment: <String, String>{
-      'GIT_TRACE': '2',
-      'GIT_TRACE_SETUP': '2'
-    },
-    includeParentEnvironment: true
-  );
-  if (gitResult.exitCode != 0) {
-    throw GitStatusFailed(gitResult);
-  }
-  final RegExpMatch? gitBranchMatch = gitBranchRegexp.firstMatch((gitResult.stdout as String).trim().split('\n').first);
-  return gitBranchMatch == null ? '<unknown>' : gitBranchMatch.namedGroup('branch')!.split('...').first;
-}
-
-// This is a hack to workaround the fact that git status inexplicably fails
-// (random non-zero error code) about 2% of the time.
-String getChannelNameWithRetries() {
-  int retryCount = 0;
-  while(retryCount < 2) {
-    try {
-      return getChannelName();
-    } on GitStatusFailed catch (e) {
-      retryCount += 1;
-      stderr.write('git status failed, retrying ($retryCount)\nError report:\n$e');
-    }
-  }
-  return getChannelName();
-}
-
-/// Generates snippet dartdoc output for a given input, and creates any sample
-/// applications needed by the snippet.
-void main(List<String> argList) {
-  const Platform platform = LocalPlatform();
-  final Map<String, String> environment = platform.environment;
-  final ArgParser parser = ArgParser();
-  final List<String> snippetTypes =
-      SnippetType.values.map<String>((SnippetType type) => getEnumName(type)).toList();
-  parser.addOption(
-    _kTypeOption,
-    defaultsTo: getEnumName(SnippetType.sample),
-    allowed: snippetTypes,
-    allowedHelp: <String, String>{
-      getEnumName(SnippetType.sample):
-          'Produce a code sample application complete with embedding the sample in an '
-          'application template.',
-      getEnumName(SnippetType.snippet):
-          'Produce a nicely formatted piece of sample code. Does not embed the '
-          'sample into an application template.',
-    },
-    help: 'The type of snippet to produce.',
-  );
-  parser.addOption(
-    _kTemplateOption,
-    defaultsTo: null,
-    help: 'The name of the template to inject the code into.',
-  );
-  parser.addOption(
-    _kOutputOption,
-    defaultsTo: null,
-    help: 'The output path for the generated sample application. Overrides '
-        'the naming generated by the --package/--library/--element arguments. '
-        'Metadata will be written alongside in a .json file. '
-        'The basename of this argument is used as the ID',
-  );
-  parser.addOption(
-    _kInputOption,
-    defaultsTo: environment['INPUT'],
-    help: 'The input file containing the sample code to inject.',
-  );
-  parser.addOption(
-    _kPackageOption,
-    defaultsTo: environment['PACKAGE_NAME'],
-    help: 'The name of the package that this sample belongs to.',
-  );
-  parser.addOption(
-    _kLibraryOption,
-    defaultsTo: environment['LIBRARY_NAME'],
-    help: 'The name of the library that this sample belongs to.',
-  );
-  parser.addOption(
-    _kElementOption,
-    defaultsTo: environment['ELEMENT_NAME'],
-    help: 'The name of the element that this sample belongs to.',
-  );
-  parser.addOption(
-    _kSerialOption,
-    defaultsTo: environment['INVOCATION_INDEX'],
-    help: 'A unique serial number for this snippet tool invocation.',
-  );
-  parser.addFlag(
-    _kHelpOption,
-    defaultsTo: false,
-    negatable: false,
-    help: 'Prints help documentation for this command',
-  );
-  parser.addFlag(
-    _kShowDartPad,
-    defaultsTo: false,
-    negatable: false,
-    help: "Indicates whether DartPad should be included in the sample's "
-        'final HTML output. This flag only applies when the type parameter is '
-        '"sample".',
-  );
-
-  final ArgResults args = parser.parse(argList);
-
-  if (args[_kHelpOption] as bool) {
-    stderr.writeln(parser.usage);
-    exit(0);
-  }
-
-  final SnippetType snippetType = SnippetType.values
-      .firstWhere((SnippetType type) => getEnumName(type) == args[_kTypeOption]);
-
-  if (args[_kShowDartPad] == true && snippetType != SnippetType.sample) {
-    errorExit('${args[_kTypeOption]} was selected, but the --dartpad flag is only valid '
-      'for application sample code.');
-  }
-
-  if (args[_kInputOption] == null) {
-    stderr.writeln(parser.usage);
-    errorExit('The --$_kInputOption option must be specified, either on the command '
-        'line, or in the INPUT environment variable.');
-  }
-
-  final File input = File(args['input'] as String);
-  if (!input.existsSync()) {
-    errorExit('The input file ${input.path} does not exist.');
-  }
-
-  String? template;
-  if (snippetType == SnippetType.sample) {
-    final String templateArg = args[_kTemplateOption] as String;
-    if (templateArg == null || templateArg.isEmpty) {
-      stderr.writeln(parser.usage);
-      errorExit('The --$_kTemplateOption option must be specified on the command '
-          'line for application samples.');
-    }
-    template = templateArg.replaceAll(RegExp(r'.tmpl$'), '');
-  }
-
-  final String packageName = args[_kPackageOption] as String? ?? '';
-  final String libraryName = args[_kLibraryOption] as String? ?? '';
-  final String elementName = args[_kElementOption] as String? ?? '';
-  final String serial = args[_kSerialOption] as String? ?? '';
-  final List<String> id = <String>[];
-  if (args[_kOutputOption] != null) {
-    id.add(path.basename(path.basenameWithoutExtension(args[_kOutputOption] as String)));
-  } else {
-    if (packageName.isNotEmpty && packageName != 'flutter') {
-      id.add(packageName);
-    }
-    if (libraryName.isNotEmpty) {
-      id.add(libraryName);
-    }
-    if (elementName.isNotEmpty) {
-      id.add(elementName);
-    }
-    if (serial.isNotEmpty) {
-      id.add(serial);
-    }
-    if (id.isEmpty) {
-      errorExit('Unable to determine ID. At least one of --$_kPackageOption, '
-          '--$_kLibraryOption, --$_kElementOption, -$_kSerialOption, or the environment variables '
-          'PACKAGE_NAME, LIBRARY_NAME, ELEMENT_NAME, or INVOCATION_INDEX must be non-empty.');
-    }
-  }
-
-  final SnippetGenerator generator = SnippetGenerator();
-  stdout.write(generator.generate(
-    input,
-    snippetType,
-    showDartPad: args[_kShowDartPad] as bool,
-    template: template,
-    output: args[_kOutputOption] != null ? File(args[_kOutputOption] as String) : null,
-    metadata: <String, Object?>{
-      'sourcePath': environment['SOURCE_PATH'],
-      'sourceLine': environment['SOURCE_LINE'] != null
-          ? int.tryParse(environment['SOURCE_LINE']!)
-          : null,
-      'id': id.join('.'),
-      'channel': getChannelNameWithRetries(),
-      'serial': serial,
-      'package': packageName,
-      'library': libraryName,
-      'element': elementName,
-    },
-  ));
-
-  exit(0);
-}
diff --git a/dev/snippets/lib/snippets.dart b/dev/snippets/lib/snippets.dart
deleted file mode 100644
index 2dddca0b810..00000000000
--- a/dev/snippets/lib/snippets.dart
+++ /dev/null
@@ -1,350 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:dart_style/dart_style.dart';
-import 'package:path/path.dart' as path;
-
-import 'configuration.dart';
-
-void errorExit(String message) {
-  stderr.writeln(message);
-  exit(1);
-}
-
-// A Tuple containing the name and contents associated with a code block in a
-// snippet.
-class _ComponentTuple {
-  _ComponentTuple(this.name, this.contents, {this.language = ''});
-  final String name;
-  final List<String> contents;
-  final String language;
-  String get mergedContent => contents.join('\n').trim();
-}
-
-/// Generates the snippet HTML, as well as saving the output snippet main to
-/// the output directory.
-class SnippetGenerator {
-  SnippetGenerator({Configuration? configuration})
-      : configuration = configuration ??
-            // Flutter's root is four directories up from this script.
-            Configuration(flutterRoot: Directory(Platform.environment['FLUTTER_ROOT']
-                ?? path.canonicalize(path.join(path.dirname(path.fromUri(Platform.script)), '..', '..', '..')))) {
-    this.configuration.createOutputDirectory();
-  }
-
-  /// The configuration used to determine where to get/save data for the
-  /// snippet.
-  final Configuration configuration;
-
-  static const JsonEncoder jsonEncoder = JsonEncoder.withIndent('    ');
-
-  /// A Dart formatted used to format the snippet code and finished application
-  /// code.
-  static DartFormatter formatter = DartFormatter(pageWidth: 80, fixes: StyleFix.all);
-
-  /// This returns the output file for a given snippet ID. Only used for
-  /// [SnippetType.sample] snippets.
-  File getOutputFile(String id) => File(path.join(configuration.outputDirectory.path, '$id.dart'));
-
-  /// Gets the path to the template file requested.
-  File? getTemplatePath(String templateName, {Directory? templatesDir}) {
-    final Directory templateDir = templatesDir ?? configuration.templatesDirectory;
-    final File templateFile = File(path.join(templateDir.path, '$templateName.tmpl'));
-    return templateFile.existsSync() ? templateFile : null;
-  }
-
-  /// Injects the [injections] into the [template], and turning the
-  /// "description" injection into a comment. Only used for
-  /// [SnippetType.sample] snippets.
-  String _interpolateTemplate(List<_ComponentTuple> injections, String template, Map<String, Object?> metadata) {
-    final RegExp moustacheRegExp = RegExp('{{([^}]+)}}');
-    final String interpolated = template.replaceAllMapped(moustacheRegExp, (Match match) {
-      if (match[1] == 'description') {
-        // Place the description into a comment.
-        final List<String> description = injections
-            .firstWhere((_ComponentTuple tuple) => tuple.name == match[1])
-            .contents
-            .map<String>((String line) => '// $line')
-            .toList();
-        // Remove any leading/trailing empty comment lines.
-        // We don't want to remove ALL empty comment lines, only the ones at the
-        // beginning and the end.
-        while (description.isNotEmpty && description.last == '// ') {
-          description.removeLast();
-        }
-        while (description.isNotEmpty && description.first == '// ') {
-          description.removeAt(0);
-        }
-        return description.join('\n').trim();
-      } else {
-        // If the match isn't found in the injections, then just remove the
-        // mustache reference, since we want to allow the sections to be
-        // "optional" in the input: users shouldn't be forced to add an empty
-        // "```dart preamble" section if that section would be empty.
-        final int componentIndex = injections
-            .indexWhere((_ComponentTuple tuple) => tuple.name == match[1]);
-        if (componentIndex == -1) {
-          return (metadata[match[1]] ?? '').toString();
-        }
-        return injections[componentIndex].mergedContent;
-      }
-    }).trim();
-    return _sortImports(interpolated);
-  }
-
-  String _sortImports(String code) {
-    final List<String> result = <String>[];
-    final List<String> lines = code.split('\n');
-    final List<String> imports = <String>[];
-    int firstImport = -1;
-    int lineNumber =0;
-    for (final String line in lines) {
-      if (RegExp(r'^\s*import').matchAsPrefix(line) != null) {
-        if (firstImport < 0) {
-          firstImport = lineNumber;
-        }
-        imports.add(line);
-      } else {
-        result.add(line);
-      }
-      lineNumber++;
-    }
-    if (firstImport > 0) {
-      final List<String> dartImports = <String>[];
-      final List<String> packageImports = <String>[];
-      final List<String> otherImports = <String>[];
-      final RegExp typeRegExp = RegExp(r'''import\s+['"](?<type>\w+)''');
-      imports.sort();
-      for (final String importLine in imports) {
-        final RegExpMatch? match = typeRegExp.firstMatch(importLine);
-        if (match != null) {
-          switch (match.namedGroup('type')) {
-            case 'dart':
-              dartImports.add(importLine);
-              break;
-            case 'package':
-              packageImports.add(importLine);
-              break;
-            default:
-              otherImports.add(importLine);
-              break;
-          }
-        } else {
-          otherImports.add(importLine);
-        }
-      }
-
-      // Insert the sorted sections in the proper order, with a blank line in between
-      // sections.
-      result.insertAll(firstImport, <String>[
-        ...dartImports,
-        if (dartImports.isNotEmpty) '',
-        ...packageImports,
-        if (packageImports.isNotEmpty) '',
-        ...otherImports,
-      ]);
-    }
-    return result.join('\n');
-  }
-
-  /// Interpolates the [injections] into an HTML skeleton file.
-  ///
-  /// Similar to interpolateTemplate, but we are only looking for `code-`
-  /// components, and we care about the order of the injections.
-  ///
-  /// Takes into account the [type] and doesn't substitute in the id and the app
-  /// if not a [SnippetType.sample] snippet.
-  String _interpolateSkeleton(
-    SnippetType type,
-    List<_ComponentTuple> injections,
-    String skeleton,
-    Map<String, Object?> metadata,
-  ) {
-    final List<String> result = <String>[];
-    const HtmlEscape htmlEscape = HtmlEscape();
-    String language = 'dart';
-    for (final _ComponentTuple injection in injections) {
-      if (!injection.name.startsWith('code')) {
-        continue;
-      }
-      result.addAll(injection.contents);
-      if (injection.language.isNotEmpty) {
-        language = injection.language;
-      }
-      result.addAll(<String>['', '// ...', '']);
-    }
-    if (result.length > 3) {
-      result.removeRange(result.length - 3, result.length);
-    }
-    // Only insert a div for the description if there actually is some text there.
-    // This means that the {{description}} marker in the skeleton needs to
-    // be inside of an {@inject-html} block.
-    String description = injections.firstWhere((_ComponentTuple tuple) => tuple.name == 'description').mergedContent;
-    description = description.trim().isNotEmpty
-        ? '<div class="snippet-description">{@end-inject-html}$description{@inject-html}</div>'
-        : '';
-
-    // DartPad only supports stable or master as valid channels. Use master
-    // if not on stable so that local runs will work (although they will
-    // still take their sample code from the master docs server).
-    final String channel = metadata['channel'] == 'stable' ? 'stable' : 'master';
-
-    final Map<String, String> substitutions = <String, String>{
-      'description': description,
-      'code': htmlEscape.convert(result.join('\n')),
-      'language': language,
-      'serial': '',
-      'id': metadata['id']! as String,
-      'channel': channel,
-      'element': (metadata['element'] ?? '') as String,
-      'app': '',
-    };
-    if (type == SnippetType.sample) {
-      substitutions
-        ..['serial'] = metadata['serial']?.toString() ?? '0'
-        ..['app'] = htmlEscape.convert(injections.firstWhere((_ComponentTuple tuple) => tuple.name == 'app').mergedContent);
-    }
-    return skeleton.replaceAllMapped(RegExp('{{(${substitutions.keys.join('|')})}}'), (Match match) {
-      return substitutions[match[1]] ?? '';
-    });
-  }
-
-  /// Parses the input for the various code and description segments, and
-  /// returns them in the order found.
-  List<_ComponentTuple> _parseInput(String input) {
-    bool inCodeBlock = false;
-    input = input.trim();
-    final List<String> description = <String>[];
-    final List<_ComponentTuple> components = <_ComponentTuple>[];
-    String? language;
-    final RegExp codeStartEnd = RegExp(r'^\s*```(?<language>[-\w]+|[-\w]+ (?<section>[-\w]+))?\s*$');
-    for (final String line in input.split('\n')) {
-      final RegExpMatch? match = codeStartEnd.firstMatch(line);
-      if (match != null) { // If we saw the start or end of a code block
-        inCodeBlock = !inCodeBlock;
-        if (match.namedGroup('language') != null) {
-          language = match[1];
-          assert(language != null);
-          language = language!;
-          if (match.namedGroup('section') != null) {
-            components.add(_ComponentTuple('code-${match.namedGroup('section')}', <String>[], language: language));
-          } else {
-            components.add(_ComponentTuple('code', <String>[], language: language));
-          }
-        } else {
-          language = null;
-        }
-        continue;
-      }
-      if (!inCodeBlock) {
-        description.add(line);
-      } else {
-        assert(language != null);
-        if (components.isNotEmpty) {
-          components.last.contents.add(line);
-        }
-      }
-    }
-    return <_ComponentTuple>[
-      _ComponentTuple('description', description),
-      ...components,
-    ];
-  }
-
-  String _loadFileAsUtf8(File file) {
-    return file.readAsStringSync(encoding: utf8);
-  }
-
-  String _addLineNumbers(String app) {
-    final StringBuffer buffer = StringBuffer();
-    int count = 0;
-    for (final String line in app.split('\n')) {
-      count++;
-      buffer.writeln('${count.toString().padLeft(5, ' ')}: $line');
-    }
-    return buffer.toString();
-  }
-
-  /// The main routine for generating snippets.
-  ///
-  /// The [input] is the file containing the dartdoc comments (minus the leading
-  /// comment markers).
-  ///
-  /// The [type] is the type of snippet to create: either a
-  /// [SnippetType.sample] or a [SnippetType.snippet].
-  ///
-  /// [showDartPad] indicates whether DartPad should be shown where possible.
-  /// Currently, this value only has an effect if [type] is
-  /// [SnippetType.sample], in which case an alternate skeleton file is
-  /// used to create the final HTML output.
-  ///
-  /// The [template] must not be null if the [type] is
-  /// [SnippetType.sample], and specifies the name of the template to use
-  /// for the application code.
-  ///
-  /// The [id] is a string ID to use for the output file, and to tell the user
-  /// about in the `flutter create` hint. It must not be null if the [type] is
-  /// [SnippetType.sample].
-  String generate(
-    File input,
-    SnippetType type, {
-    bool showDartPad = false,
-    String? template,
-    File? output,
-    required Map<String, Object?> metadata,
-  }) {
-    assert(template != null || type != SnippetType.sample);
-    assert(metadata['id'] != null);
-    assert(!showDartPad || type == SnippetType.sample, 'Only application samples work with dartpad.');
-    final List<_ComponentTuple> snippetData = _parseInput(_loadFileAsUtf8(input));
-    switch (type) {
-      case SnippetType.sample:
-        final Directory templatesDir = configuration.templatesDirectory;
-        if (templatesDir == null) {
-          stderr.writeln('Unable to find the templates directory.');
-          exit(1);
-        }
-        final File? templateFile = getTemplatePath(template!, templatesDir: templatesDir);
-        if (templateFile == null) {
-          stderr.writeln('The template $template was not found in the templates directory ${templatesDir.path}');
-          exit(1);
-        }
-        final String templateContents = _loadFileAsUtf8(templateFile);
-        String app = _interpolateTemplate(snippetData, templateContents, metadata);
-
-        try {
-          app = formatter.format(app);
-        } on FormatterException catch (exception) {
-          stderr.write('Code to format:\n${_addLineNumbers(app)}\n');
-          errorExit('Unable to format snippet app template: $exception');
-        }
-
-        snippetData.add(_ComponentTuple('app', app.split('\n')));
-        final File outputFile = output ?? getOutputFile(metadata['id']! as String);
-        stderr.writeln('Writing to ${outputFile.absolute.path}');
-        outputFile.writeAsStringSync(app);
-
-        final File metadataFile = File(path.join(path.dirname(outputFile.path),
-            '${path.basenameWithoutExtension(outputFile.path)}.json'));
-        stderr.writeln('Writing metadata to ${metadataFile.absolute.path}');
-        final int descriptionIndex = snippetData.indexWhere(
-                (_ComponentTuple data) => data.name == 'description');
-        final String descriptionString = descriptionIndex == -1 ? '' : snippetData[descriptionIndex].mergedContent;
-        metadata.addAll(<String, Object>{
-          'file': path.basename(outputFile.path),
-          'description': descriptionString,
-        });
-        metadataFile.writeAsStringSync(jsonEncoder.convert(metadata));
-        break;
-      case SnippetType.snippet:
-        break;
-    }
-    final String skeleton =
-        _loadFileAsUtf8(configuration.getHtmlSkeletonFile(type, showDartPad: showDartPad));
-    return _interpolateSkeleton(type, snippetData, skeleton, metadata);
-  }
-}
diff --git a/dev/snippets/pubspec.yaml b/dev/snippets/pubspec.yaml
deleted file mode 100644
index 5b2f176544a..00000000000
--- a/dev/snippets/pubspec.yaml
+++ /dev/null
@@ -1,99 +0,0 @@
-name: snippets
-version: 0.1.0
-description: A code snippet dartdoc extension for Flutter API docs.
-homepage: https://github.com/flutter/flutter
-
-environment:
-  sdk: ">=2.12.1 <3.0.0"
-
-dartdoc:
-  # Exclude this package from the hosted API docs (Ironically...).
-  nodoc: true
-
-dependencies:
-  args: 2.2.0
-  dart_style: 2.0.3
-  meta: 1.7.0
-  platform: 3.0.0
-  process: 4.2.3
-
-  _fe_analyzer_shared: 23.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  analyzer: 2.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  async: 2.8.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  charcode: 1.3.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  cli_util: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  collection: 1.15.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  convert: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  crypto: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  file: 6.1.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  glob: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  package_config: 2.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  path: 1.8.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pedantic: 1.11.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pub_semver: 2.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  source_span: 1.8.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  string_scanner: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  term_glyph: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  typed_data: 1.3.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  watcher: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  yaml: 3.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-
-dev_dependencies:
-  test: 1.17.10
-
-  boolean_selector: 2.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  coverage: 1.0.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  frontend_server_client: 2.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 3.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_parser: 4.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  io: 1.0.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  js: 0.6.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  logging: 1.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  matcher: 0.12.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  mime: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  node_preamble: 2.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pool: 1.5.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf: 1.1.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf_packages_handler: 3.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf_static: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf_web_socket: 1.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  source_map_stack_trace: 2.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  source_maps: 0.10.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  stack_trace: 1.10.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  stream_channel: 2.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  test_api: 0.4.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  test_core: 0.4.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service: 7.1.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  web_socket_channel: 2.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  webkit_inspection_protocol: 1.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-
-executables:
-  snippets: null
-
-  boolean_selector: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http: 0.12.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_multi_server: 2.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  http_parser: 3.1.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  io: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  js: 0.6.1+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  json_rpc_2: 2.0.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  matcher: 0.12.3+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  mime: 0.9.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  multi_server_socket: 1.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  node_preamble: 1.4.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  package_resolver: 1.0.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pool: 1.3.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pub_semver: 1.4.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf: 0.7.3+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf_packages_handler: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf_static: 0.2.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  shelf_web_socket: 0.2.2+4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  source_map_stack_trace: 1.1.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  source_maps: 0.10.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  stack_trace: 1.9.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  stream_channel: 1.6.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  term_glyph: 1.0.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  vm_service_client: 0.2.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  web_socket_channel: 1.0.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-
-# PUBSPEC CHECKSUM: c51d
diff --git a/dev/snippets/test/configuration_test.dart b/dev/snippets/test/configuration_test.dart
deleted file mode 100644
index 26131ab655b..00000000000
--- a/dev/snippets/test/configuration_test.dart
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:io';
-
-import 'package:snippets/configuration.dart';
-import 'package:test/test.dart' hide TypeMatcher, isInstanceOf;
-
-void main() {
-  group('Configuration', () {
-    late Configuration config;
-
-    setUp(() {
-      config = Configuration(flutterRoot: Directory('/flutter sdk'));
-    });
-    test('config directory is correct', () async {
-      expect(config.configDirectory.path,
-          matches(RegExp(r'[/\\]flutter sdk[/\\]dev[/\\]snippets[/\\]config')));
-    });
-    test('output directory is correct', () async {
-      expect(config.outputDirectory.path,
-          matches(RegExp(r'[/\\]flutter sdk[/\\]dev[/\\]docs[/\\]doc[/\\]snippets')));
-    });
-    test('skeleton directory is correct', () async {
-      expect(config.skeletonsDirectory.path,
-          matches(RegExp(r'[/\\]flutter sdk[/\\]dev[/\\]snippets[/\\]config[/\\]skeletons')));
-    });
-    test('templates directory is correct', () async {
-      expect(config.templatesDirectory.path,
-          matches(RegExp(r'[/\\]flutter sdk[/\\]dev[/\\]snippets[/\\]config[/\\]templates')));
-    });
-    test('html skeleton file for sample is correct', () async {
-      expect(
-          config.getHtmlSkeletonFile(SnippetType.snippet).path,
-          matches(RegExp(
-              r'[/\\]flutter sdk[/\\]dev[/\\]snippets[/\\]config[/\\]skeletons[/\\]snippet.html')));
-    });
-    test('html skeleton file for app with no dartpad is correct', () async {
-      expect(
-          config.getHtmlSkeletonFile(SnippetType.sample).path,
-          matches(RegExp(
-              r'[/\\]flutter sdk[/\\]dev[/\\]snippets[/\\]config[/\\]skeletons[/\\]sample.html')));
-    });
-    test('html skeleton file for app with dartpad is correct', () async {
-      expect(
-          config.getHtmlSkeletonFile(SnippetType.sample, showDartPad: true).path,
-          matches(RegExp(
-              r'[/\\]flutter sdk[/\\]dev[/\\]snippets[/\\]config[/\\]skeletons[/\\]dartpad-sample.html')));
-    });
-  });
-}
diff --git a/dev/snippets/test/snippets_test.dart b/dev/snippets/test/snippets_test.dart
deleted file mode 100644
index 7e54896d6e8..00000000000
--- a/dev/snippets/test/snippets_test.dart
+++ /dev/null
@@ -1,334 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:convert';
-import 'dart:io' show Directory, File, Process, ProcessResult, ProcessSignal, ProcessStartMode, SystemEncoding;
-import 'package:path/path.dart' as path;
-import 'package:platform/platform.dart';
-import 'package:process/process.dart';
-import 'package:snippets/configuration.dart';
-import 'package:snippets/main.dart' show getChannelName;
-import 'package:snippets/snippets.dart';
-import 'package:test/test.dart' hide TypeMatcher, isInstanceOf;
-
-void main() {
-  group('Generator', () {
-    late Configuration configuration;
-    late SnippetGenerator generator;
-    late Directory tmpDir;
-    late File template;
-
-    setUp(() {
-      tmpDir = Directory.systemTemp.createTempSync('flutter_snippets_test.');
-      configuration = Configuration(flutterRoot: Directory(path.join(
-          tmpDir.absolute.path, 'flutter')));
-      configuration.createOutputDirectory();
-      configuration.templatesDirectory.createSync(recursive: true);
-      configuration.skeletonsDirectory.createSync(recursive: true);
-      template = File(path.join(configuration.templatesDirectory.path, 'template.tmpl'));
-      template.writeAsStringSync('''
-// Flutter code sample for {{element}}
-
-{{description}}
-
-import 'package:flutter/material.dart';
-import '../foo.dart';
-
-{{code-imports}}
-
-{{code-my-preamble}}
-
-main() {
-  {{code}}
-}
-''');
-      configuration.getHtmlSkeletonFile(SnippetType.sample).writeAsStringSync('''
-<div>HTML Bits</div>
-{{description}}
-<pre>{{code}}</pre>
-<pre>{{app}}</pre>
-<div>More HTML Bits</div>
-''');
-      configuration.getHtmlSkeletonFile(SnippetType.snippet).writeAsStringSync('''
-<div>HTML Bits</div>
-{{description}}
-<pre>{{code}}</pre>
-<div>More HTML Bits</div>
-''');
-      configuration.getHtmlSkeletonFile(SnippetType.sample, showDartPad: true).writeAsStringSync('''
-<div>HTML Bits (DartPad-style)</div>
-<iframe class="snippet-dartpad" src="https://dartpad.dev/embed-flutter.html?split=60&run=true&sample_id={{id}}&sample_channel={{channel}}"></iframe>
-<div>More HTML Bits</div>
-''');
-      generator = SnippetGenerator(configuration: configuration);
-    });
-    tearDown(() {
-      tmpDir.deleteSync(recursive: true);
-    });
-
-    test('generates samples', () async {
-      final File inputFile = File(path.join(tmpDir.absolute.path, 'snippet_in.txt'))
-        ..createSync(recursive: true)
-        ..writeAsStringSync(r'''
-A description of the snippet.
-
-On several lines.
-
-```dart imports
-import 'dart:ui';
-```
-
-```my-dart_language my-preamble
-const String name = 'snippet';
-```
-
-```dart
-void main() {
-  print('The actual $name.');
-}
-```
-''');
-      final File outputFile = File(path.join(tmpDir.absolute.path, 'snippet_out.txt'));
-
-      final String html = generator.generate(
-        inputFile,
-        SnippetType.sample,
-        template: 'template',
-        metadata: <String, Object>{
-          'id': 'id',
-          'channel': 'stable',
-          'element': 'MyElement',
-        },
-        output: outputFile,
-      );
-      expect(html, contains('<div>HTML Bits</div>'));
-      expect(html, contains('<div>More HTML Bits</div>'));
-      expect(html, contains(r'print(&#39;The actual $name.&#39;);'));
-      expect(html, contains('A description of the snippet.\n'));
-      expect(html, isNot(contains('sample_channel=stable')));
-      expect(
-          html,
-          contains('&#47;&#47; A description of the snippet.\n'
-              '&#47;&#47;\n'
-              '&#47;&#47; On several lines.\n'));
-      expect(html, contains('void main() {'));
-
-      final String outputContents = outputFile.readAsStringSync();
-      expect(outputContents, contains('// Flutter code sample for MyElement'));
-      expect(outputContents, contains('A description of the snippet.'));
-      expect(outputContents, contains('void main() {'));
-      expect(outputContents, contains("const String name = 'snippet';"));
-      final List<String> lines = outputContents.split('\n');
-      final int dartUiLine = lines.indexOf("import 'dart:ui';");
-      final int materialLine = lines.indexOf("import 'package:flutter/material.dart';");
-      final int otherLine = lines.indexOf("import '../foo.dart';");
-      expect(dartUiLine, lessThan(materialLine));
-      expect(materialLine, lessThan(otherLine));
-    });
-
-    test('generates snippets', () async {
-      final File inputFile = File(path.join(tmpDir.absolute.path, 'snippet_in.txt'))
-        ..createSync(recursive: true)
-        ..writeAsStringSync(r'''
-A description of the snippet.
-
-On several lines.
-
-```code
-void main() {
-  print('The actual $name.');
-}
-```
-''');
-
-      final String html = generator.generate(
-        inputFile,
-        SnippetType.snippet,
-        metadata: <String, Object>{'id': 'id'},
-      );
-      expect(html, contains('<div>HTML Bits</div>'));
-      expect(html, contains('<div>More HTML Bits</div>'));
-      expect(html, contains(r'  print(&#39;The actual $name.&#39;);'));
-      expect(html, contains('<div class="snippet-description">{@end-inject-html}A description of the snippet.\n\n'
-          'On several lines.{@inject-html}</div>\n'));
-      expect(html, contains('main() {'));
-    });
-
-    test('generates dartpad samples', () async {
-      final File inputFile = File(path.join(tmpDir.absolute.path, 'snippet_in.txt'))
-        ..createSync(recursive: true)
-        ..writeAsStringSync(r'''
-A description of the snippet.
-
-On several lines.
-
-```code
-void main() {
-  print('The actual $name.');
-}
-```
-''');
-
-      final String html = generator.generate(
-        inputFile,
-        SnippetType.sample,
-        showDartPad: true,
-        template: 'template',
-        metadata: <String, Object>{'id': 'id', 'channel': 'stable'},
-      );
-      expect(html, contains('<div>HTML Bits (DartPad-style)</div>'));
-      expect(html, contains('<div>More HTML Bits</div>'));
-      expect(html, contains('<iframe class="snippet-dartpad" src="https://dartpad.dev/embed-flutter.html?split=60&run=true&sample_id=id&sample_channel=stable"></iframe>'));
-    });
-
-    test('generates sample metadata', () async {
-      final File inputFile = File(path.join(tmpDir.absolute.path, 'snippet_in.txt'))
-        ..createSync(recursive: true)
-        ..writeAsStringSync(r'''
-A description of the snippet.
-
-On several lines.
-
-```code
-void main() {
-  print('The actual $name.');
-}
-```
-''');
-
-      final File outputFile = File(path.join(tmpDir.absolute.path, 'snippet_out.dart'));
-      final File expectedMetadataFile = File(path.join(tmpDir.absolute.path, 'snippet_out.json'));
-
-      generator.generate(
-        inputFile,
-        SnippetType.sample,
-        template: 'template',
-        output: outputFile,
-        metadata: <String, Object>{'sourcePath': 'some/path.dart', 'id': 'id', 'channel': 'stable'},
-      );
-      expect(expectedMetadataFile.existsSync(), isTrue);
-      final Map<String, dynamic> json = jsonDecode(expectedMetadataFile.readAsStringSync()) as Map<String, dynamic>;
-      expect(json['id'], equals('id'));
-      expect(json['channel'], equals('stable'));
-      expect(json['file'], equals('snippet_out.dart'));
-      expect(json['description'], equals('A description of the snippet.\n\nOn several lines.'));
-      // Ensure any passed metadata is included in the output JSON too.
-      expect(json['sourcePath'], equals('some/path.dart'));
-    });
-  });
-
-  group('getChannelName()', () {
-    test('does not call git if LUCI_BRANCH env var provided', () {
-      const String branch = 'stable';
-      final FakePlatform platform = FakePlatform(
-        environment: <String, String>{'LUCI_BRANCH': branch},
-      );
-      final FakeProcessManager processManager = FakeProcessManager(<FakeCommand>[]);
-      expect(
-        getChannelName(
-          platform: platform,
-          processManager: processManager,
-        ),
-        branch,
-      );
-      expect(processManager.hasRemainingExpectations, false);
-    });
-
-    test('calls git if LUCI_BRANCH env var is not provided', () {
-      const String branch = 'stable';
-      final FakePlatform platform = FakePlatform(
-        environment: <String, String>{},
-      );
-      final ProcessResult result = ProcessResult(0, 0, '## $branch...refs/heads/master', '');
-      final FakeProcessManager processManager = FakeProcessManager(
-        <FakeCommand>[FakeCommand('git status -b --porcelain', result)],
-      );
-      expect(
-        getChannelName(
-          platform: platform,
-          processManager: processManager,
-        ),
-        branch,
-      );
-      expect(processManager.hasRemainingExpectations, false);
-    });
-  });
-}
-
-const SystemEncoding systemEncoding = SystemEncoding();
-
-class FakeCommand {
-  FakeCommand(this.command, [ProcessResult? result]) : _result = result;
-  final String command;
-
-  final ProcessResult? _result;
-  ProcessResult get result => _result ?? ProcessResult(0, 0, '', '');
-}
-
-class FakeProcessManager implements ProcessManager {
-  FakeProcessManager(this.remainingExpectations);
-
-  final List<FakeCommand> remainingExpectations;
-
-  @override
-  bool canRun(dynamic command, {String? workingDirectory}) => true;
-
-  @override
-  Future<Process> start(
-    List<Object> command, {
-    String? workingDirectory,
-    Map<String, String>? environment,
-    bool includeParentEnvironment = true,
-    bool runInShell = false,
-    ProcessStartMode mode = ProcessStartMode.normal,
-  }) {
-    throw Exception('not implemented');
-  }
-
-  @override
-  Future<ProcessResult> run(
-    List<Object> command, {
-    String? workingDirectory,
-    Map<String, String>? environment,
-    bool includeParentEnvironment = true,
-    bool runInShell = false,
-    Encoding stdoutEncoding = systemEncoding,
-    Encoding stderrEncoding = systemEncoding,
-  }) {
-    throw Exception('not implemented');
-  }
-
-  @override
-  ProcessResult runSync(
-    List<Object> command, {
-    String? workingDirectory,
-    Map<String, String>? environment,
-    bool includeParentEnvironment = true,
-    bool runInShell = false,
-    Encoding stdoutEncoding = systemEncoding,
-    Encoding stderrEncoding = systemEncoding,
-  }) {
-    if (remainingExpectations.isEmpty) {
-      fail(
-        'Called FakeProcessManager with $command when no further commands were expected!',
-      );
-    }
-    final FakeCommand expectedCommand = remainingExpectations.removeAt(0);
-    final String expectedName = expectedCommand.command;
-    final String actualName = command.join(' ');
-    if (expectedName != actualName) {
-      fail(
-        'FakeProcessManager expected the command $expectedName but received $actualName',
-      );
-    }
-    return expectedCommand.result;
-  }
-
-  bool get hasRemainingExpectations => remainingExpectations.isNotEmpty;
-
-  @override
-  bool killPid(int pid, [ProcessSignal signal = ProcessSignal.sigterm]) {
-    throw Exception('not implemented');
-  }
-}
diff --git a/dev/tools/dartdoc.dart b/dev/tools/dartdoc.dart
index 2bd01565516..5cbcaa5eb74 100644
--- a/dev/tools/dartdoc.dart
+++ b/dev/tools/dartdoc.dart
@@ -118,14 +118,25 @@ Future<void> main(List<String> arguments) async {
     'dartdoc',
   ];
 
-  // Verify which version of dartdoc we're using.
-  final ProcessResult result = Process.runSync(
+  // Verify which version of snippets and dartdoc we're using.
+  final ProcessResult snippetsResult = Process.runSync(
     pubExecutable,
-    <String>[...dartdocBaseArgs, '--version'],
+    <String>[
+      'global',
+      'list',
+    ],
     workingDirectory: kDocsRoot,
     environment: pubEnvironment,
+    stdoutEncoding: utf8,
   );
-  print('\n${result.stdout}flutter version: $version\n');
+  print('');
+  final Iterable<RegExpMatch> versionMatches = RegExp(r'^(?<name>snippets|dartdoc) (?<version>[^\s]+)', multiLine: true)
+      .allMatches(snippetsResult.stdout as String);
+  for (final RegExpMatch match in versionMatches) {
+    print('${match.namedGroup('name')} version: ${match.namedGroup('version')}');
+  }
+
+  print('flutter version: $version\n');
 
   // Dartdoc warnings and errors in these packages are considered fatal.
   // All packages owned by flutter should be in the list.
diff --git a/packages/flutter/lib/src/cupertino/page_scaffold.dart b/packages/flutter/lib/src/cupertino/page_scaffold.dart
index 65b330868e5..5fa3e59b176 100644
--- a/packages/flutter/lib/src/cupertino/page_scaffold.dart
+++ b/packages/flutter/lib/src/cupertino/page_scaffold.dart
@@ -32,7 +32,7 @@ import 'theme.dart';
 ///     // Uncomment to change the background color
 ///     // backgroundColor: CupertinoColors.systemPink,
 ///     navigationBar: const CupertinoNavigationBar(
-///       middle: const Text('Sample Code'),
+///       middle: Text('Sample Code'),
 ///     ),
 ///     child: ListView(
 ///       children: <Widget>[
diff --git a/packages/flutter/lib/src/material/app_bar.dart b/packages/flutter/lib/src/material/app_bar.dart
index 6f6c81e9979..88c61ada3c8 100644
--- a/packages/flutter/lib/src/material/app_bar.dart
+++ b/packages/flutter/lib/src/material/app_bar.dart
@@ -1410,7 +1410,7 @@ class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate {
 ///           child: SizedBox(
 ///             height: 20,
 ///             child: Center(
-///               child: const Text('Scroll to see the SliverAppBar in effect.'),
+///               child: Text('Scroll to see the SliverAppBar in effect.'),
 ///             ),
 ///           ),
 ///         ),
diff --git a/packages/flutter/lib/src/material/data_table.dart b/packages/flutter/lib/src/material/data_table.dart
index 4389ef24b0c..0bc190f2c16 100644
--- a/packages/flutter/lib/src/material/data_table.dart
+++ b/packages/flutter/lib/src/material/data_table.dart
@@ -382,7 +382,7 @@ class DataCell {
 ///     child: DataTable(
 ///       columns: const <DataColumn>[
 ///         DataColumn(
-///           label: const Text('Number'),
+///           label: Text('Number'),
 ///         ),
 ///       ],
 ///       rows: List<DataRow>.generate(
diff --git a/packages/flutter/lib/src/material/input_decorator.dart b/packages/flutter/lib/src/material/input_decorator.dart
index 18ea3d756ec..a946c4c4867 100644
--- a/packages/flutter/lib/src/material/input_decorator.dart
+++ b/packages/flutter/lib/src/material/input_decorator.dart
@@ -2426,7 +2426,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
 ///       hintText: 'Hint Text',
 ///       helperText: 'Helper Text',
 ///       counterText: '0 characters',
-///       border: const OutlineInputBorder(),
+///       border: OutlineInputBorder(),
 ///     ),
 ///   );
 /// }
diff --git a/packages/flutter/lib/src/material/progress_indicator.dart b/packages/flutter/lib/src/material/progress_indicator.dart
index 89f056fab38..7f7f8dce5f6 100644
--- a/packages/flutter/lib/src/material/progress_indicator.dart
+++ b/packages/flutter/lib/src/material/progress_indicator.dart
@@ -281,7 +281,7 @@ class _LinearProgressIndicatorPainter extends CustomPainter {
 ///         children: <Widget>[
 ///           const Text(
 ///             'Linear progress indicator with a fixed color',
-///             style: const TextStyle(fontSize: 20),
+///             style: TextStyle(fontSize: 20),
 ///           ),
 ///           LinearProgressIndicator(
 ///             value: controller.value,
diff --git a/packages/flutter/lib/src/painting/gradient.dart b/packages/flutter/lib/src/painting/gradient.dart
index d416ebf5a7d..03cdeb3e072 100644
--- a/packages/flutter/lib/src/painting/gradient.dart
+++ b/packages/flutter/lib/src/painting/gradient.dart
@@ -339,10 +339,10 @@ abstract class Gradient {
 ///  Widget build(BuildContext context) {
 ///    return Container(
 ///      decoration: const BoxDecoration(
-///        gradient: const LinearGradient(
+///        gradient: LinearGradient(
 ///          begin: Alignment.topLeft,
 ///          end: Alignment(0.8, 0.0), // 10% of the width, so there are ten blinds.
-///          colors: const <Color>[Color(0xffee0000), Color(0xffeeee00)], // red to yellow
+///          colors: <Color>[Color(0xffee0000), Color(0xffeeee00)], // red to yellow
 ///          tileMode: TileMode.repeated, // repeats the gradient over the canvas
 ///        ),
 ///      ),
diff --git a/packages/flutter/lib/src/widgets/autocomplete.dart b/packages/flutter/lib/src/widgets/autocomplete.dart
index 9684fcdb284..5eb804c71cf 100644
--- a/packages/flutter/lib/src/widgets/autocomplete.dart
+++ b/packages/flutter/lib/src/widgets/autocomplete.dart
@@ -444,7 +444,7 @@ typedef AutocompleteOptionToString<T extends Object> = String Function(T option)
 ///           ),
 ///           ElevatedButton(
 ///             onPressed: () {
-///               FocusScope.of(context).requestFocus(new FocusNode());
+///               FocusScope.of(context).unfocus();
 ///               if (!_formKey.currentState!.validate()) {
 ///                 return;
 ///               }
diff --git a/packages/flutter/lib/src/widgets/focus_manager.dart b/packages/flutter/lib/src/widgets/focus_manager.dart
index 9efd4b7f1bc..ea1715aff15 100644
--- a/packages/flutter/lib/src/widgets/focus_manager.dart
+++ b/packages/flutter/lib/src/widgets/focus_manager.dart
@@ -901,7 +901,7 @@ class FocusNode with DiagnosticableTreeMixin, ChangeNotifier {
   ///               return const SizedBox(
   ///                 width: 200,
   ///                 child: Padding(
-  ///                   padding: const EdgeInsets.all(8.0),
+  ///                   padding: EdgeInsets.all(8.0),
   ///                   child: TextField(
   ///                     decoration: InputDecoration(border: OutlineInputBorder()),
   ///                   ),
diff --git a/packages/flutter/lib/src/widgets/framework.dart b/packages/flutter/lib/src/widgets/framework.dart
index 30fd905ddd4..5309a36811e 100644
--- a/packages/flutter/lib/src/widgets/framework.dart
+++ b/packages/flutter/lib/src/widgets/framework.dart
@@ -4433,7 +4433,7 @@ typedef ErrorWidgetBuilder = Widget Function(FlutterErrorDetails details);
 ///       alignment: Alignment.center,
 ///       child: const Text(
 ///         'Error!',
-///         style: const TextStyle(color: Colors.yellow),
+///         style: TextStyle(color: Colors.yellow),
 ///         textDirection: TextDirection.ltr,
 ///       ),
 ///     );