Start day 2

lib/day2/command.dart

@@ -0,0 +1,45 @@
+import "dart:convert";
+import "dart:io";
+
+import "package:args/command_runner.dart";
+
+class Day2Command extends Command {
+  // The [name] and [description] properties must be defined by every
+  // subclass.
+  @override
+  final name = "day2";
+
+  @override
+  final description = "Run Advent of Code 2025 Day 2";
+
+  Day2Command() {
+    // we can add command specific arguments here.
+    // [argParser] is automatically created by the parent class.
+  }
+
+  // [run] may also return a Future.
+  @override
+  Future<void> run() async {
+    // [argResults] is set before [run()] is called and contains the flags/options
+    // passed to this command.
+
+    if (argResults!.rest.length != 1) {
+      print(
+        "Expected 1 positional arguments, found ${argResults!.rest.length}",
+      );
+    }
+    var filePath = argResults!.rest[0];
+
+    print("Parsing file: $filePath");
+
+    var inputFile = File(filePath);
+    var openFile = inputFile.openRead();
+
+    var lines = openFile.transform(utf8.decoder).transform(LineSplitter());
+
+    await for (var line in lines) {
+      print(line);
+      print('-------');
+    }
+  }
+}