Add milestones and labels to Ticket model (DEW-0011)

- Ticket.milestones and Ticket.labels: List<String>, optional (default [])
- toFileContent() emits milestones:/labels: YAML lists when non-empty
- fromFileContent() parses them back; empty when absent (backwards compat)
- TicketStore.create() and update() accept milestones/labels params
- CreateCommand and UpdateCommand: --milestone/--label multi-options
- ListCommand and SearchCommand: --milestone/--label filter options
- 4 new tests: model roundtrip, store persistence, update patch, no fields when empty

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

packages/kanban/lib/src/commands/create_command.dart

@@ -18,7 +18,12 @@ class CreateCommand extends DewCommand with DewToolCommand {
         abbr: 'c',
         help: 'Initial column. Defaults to the first configured column.',
       )
-      ..addOption('body', abbr: 'b', help: 'Ticket description.');
+      ..addOption('body', abbr: 'b', help: 'Ticket description.')
+      ..addMultiOption(
+        'milestone',
+        help: 'Milestone(s) to assign (repeatable).',
+      )
+      ..addMultiOption('label', help: 'Label(s) to assign (repeatable).');
   }
 
   @override
@@ -39,6 +44,8 @@ class CreateCommand extends DewCommand with DewToolCommand {
     final typeId = args['type'] as String;
     final columnArg = args['column'] as String?;
     final body = args['body'] as String? ?? '';
+    final milestones = _toStringList(args['milestone']);
+    final labels = _toStringList(args['label']);
 
     if (!config.ticketTypes.any((t) => t.id == typeId)) {
       throw ArgumentError(
@@ -64,7 +71,15 @@ class CreateCommand extends DewCommand with DewToolCommand {
       type: typeId,
       column: column,
       body: body,
+      milestones: milestones,
+      labels: labels,
     );
     return 'Created ${ticket.id}: ${ticket.title}';
   }
+
+  static List<String> _toStringList(dynamic value) {
+    if (value is List) return value.cast<String>();
+    if (value is String && value.isNotEmpty) return [value];
+    return const [];
+  }
 }

packages/kanban/lib/src/commands/list_command.dart

@@ -8,7 +8,9 @@ class ListCommand extends DewCommand with DewToolCommand {
   ListCommand() {
     argParser
       ..addOption('column', abbr: 'c', help: 'Filter to tickets in this column.')
-      ..addOption('type', abbr: 't', help: 'Filter to tickets of this type.');
+      ..addOption('type', abbr: 't', help: 'Filter to tickets of this type.')
+      ..addOption('label', help: 'Filter to tickets with this label.')
+      ..addOption('milestone', help: 'Filter to tickets in this milestone.');
   }
 
   @override
@@ -24,6 +26,8 @@ class ListCommand extends DewCommand with DewToolCommand {
   Future<String> callAsTool(Map<String, dynamic> args) async {
     final columnFilter = args['column'] as String?;
     final typeFilter = args['type'] as String?;
+    final labelFilter = args['label'] as String?;
+    final milestoneFilter = args['milestone'] as String?;
 
     final context = await ProjectContext.find();
     final store = TicketStore(
@@ -38,6 +42,12 @@ class ListCommand extends DewCommand with DewToolCommand {
     if (typeFilter != null) {
       tickets = tickets.where((t) => t.type == typeFilter).toList();
     }
+    if (labelFilter != null) {
+      tickets = tickets.where((t) => t.labels.contains(labelFilter)).toList();
+    }
+    if (milestoneFilter != null) {
+      tickets = tickets.where((t) => t.milestones.contains(milestoneFilter)).toList();
+    }
 
     if (tickets.isEmpty) return 'No tickets found.';
     return tickets

packages/kanban/lib/src/commands/search_command.dart

@@ -14,7 +14,9 @@ class SearchCommand extends DewCommand with DewToolCommand {
         help: 'Search query (matches title, body, and comments).',
       )
       ..addOption('column', abbr: 'c', help: 'Restrict search to this column.')
-      ..addOption('type', abbr: 't', help: 'Restrict search to this ticket type.');
+      ..addOption('type', abbr: 't', help: 'Restrict search to this ticket type.')
+      ..addOption('label', help: 'Restrict search to tickets with this label.')
+      ..addOption('milestone', help: 'Restrict search to tickets in this milestone.');
   }
 
   @override
@@ -31,6 +33,8 @@ class SearchCommand extends DewCommand with DewToolCommand {
     final query = (args['query'] as String).toLowerCase();
     final columnFilter = args['column'] as String?;
     final typeFilter = args['type'] as String?;
+    final labelFilter = args['label'] as String?;
+    final milestoneFilter = args['milestone'] as String?;
 
     final context = await ProjectContext.find();
     final store = TicketStore(
@@ -45,6 +49,12 @@ class SearchCommand extends DewCommand with DewToolCommand {
     if (typeFilter != null) {
       tickets = tickets.where((t) => t.type == typeFilter).toList();
     }
+    if (labelFilter != null) {
+      tickets = tickets.where((t) => t.labels.contains(labelFilter)).toList();
+    }
+    if (milestoneFilter != null) {
+      tickets = tickets.where((t) => t.milestones.contains(milestoneFilter)).toList();
+    }
 
     final matches = tickets.where((t) {
       return t.title.toLowerCase().contains(query) ||

packages/kanban/lib/src/commands/update_command.dart

@@ -11,7 +11,15 @@ class UpdateCommand extends DewCommand with DewToolCommand {
       ..addOption('title', abbr: 't', help: 'New title.')
       ..addOption('type', help: 'New ticket type.')
       ..addOption('column', abbr: 'c', help: 'New column.')
-      ..addOption('body', abbr: 'b', help: 'New body (replaces existing body).');
+      ..addOption('body', abbr: 'b', help: 'New body (replaces existing body).')
+      ..addMultiOption(
+        'milestone',
+        help: 'Replace milestone list (repeatable; omit to leave unchanged).',
+      )
+      ..addMultiOption(
+        'label',
+        help: 'Replace label list (repeatable; omit to leave unchanged).',
+      );
   }
 
   @override
@@ -30,9 +38,23 @@ class UpdateCommand extends DewCommand with DewToolCommand {
     final typeId = args['type'] as String?;
     final column = args['column'] as String?;
     final body = args['body'] as String?;
+    final rawMilestones = args['milestone'] as List?;
+    final milestones = rawMilestones != null && rawMilestones.isNotEmpty
+        ? rawMilestones.cast<String>()
+        : null;
+    final rawLabels = args['label'] as List?;
+    final labels =
+        rawLabels != null && rawLabels.isNotEmpty ? rawLabels.cast<String>() : null;
 
-    if (title == null && typeId == null && column == null && body == null) {
-      throw ArgumentError('At least one of --title, --type, --column, --body must be specified.');
+    if (title == null &&
+        typeId == null &&
+        column == null &&
+        body == null &&
+        milestones == null &&
+        labels == null) {
+      throw ArgumentError(
+        'At least one of --title, --type, --column, --body, --milestone, --label must be specified.',
+      );
     }
 
     final context = await ProjectContext.find();
@@ -55,7 +77,15 @@ class UpdateCommand extends DewCommand with DewToolCommand {
       kanbanDir: p.join(context.root, '.project', 'kanban'),
       prefix: config.prefix,
     );
-    final ticket = await store.update(id, title: title, type: typeId, column: column, body: body);
+    final ticket = await store.update(
+      id,
+      title: title,
+      type: typeId,
+      column: column,
+      body: body,
+      milestones: milestones,
+      labels: labels,
+    );
     return 'Updated ${ticket.id}.';
   }
 }

packages/kanban/lib/src/ticket.dart

@@ -36,9 +36,9 @@ class Ticket {
   final DateTime created;
   final String body;
   final List<String> comments;
-
-  /// Typed links to other tickets.
   final List<TicketLink> links;
+  final List<String> milestones;
+  final List<String> labels;
 
   const Ticket({
     required this.id,
@@ -49,6 +49,8 @@ class Ticket {
     required this.body,
     required this.comments,
     this.links = const [],
+    this.milestones = const [],
+    this.labels = const [],
   });
 
   Ticket copyWith({
@@ -58,6 +60,8 @@ class Ticket {
     String? body,
     List<String>? comments,
     List<TicketLink>? links,
+    List<String>? milestones,
+    List<String>? labels,
   }) => Ticket(
     id: id,
     title: title ?? this.title,
@@ -67,6 +71,8 @@ class Ticket {
     body: body ?? this.body,
     comments: comments ?? this.comments,
     links: links ?? this.links,
+    milestones: milestones ?? this.milestones,
+    labels: labels ?? this.labels,
   );
 
   /// Serialises the ticket to markdown with YAML frontmatter.
@@ -95,6 +101,18 @@ class Ticket {
     buf.writeln('title: ${_yamlQuote(title)}');
     buf.writeln('type: $type');
     buf.writeln('created: ${created.toUtc().toIso8601String()}');
+    if (milestones.isNotEmpty) {
+      buf.writeln('milestones:');
+      for (final m in milestones) {
+        buf.writeln('  - ${_yamlQuote(m)}');
+      }
+    }
+    if (labels.isNotEmpty) {
+      buf.writeln('labels:');
+      for (final l in labels) {
+        buf.writeln('  - ${_yamlQuote(l)}');
+      }
+    }
     if (links.isNotEmpty) {
       buf.writeln('links:');
       for (final link in links) {
@@ -146,6 +164,11 @@ class Ticket {
             .toList() ??
         const [];
 
+    List<String> parseStringList(String key) {
+      final raw = fm[key] as YamlList?;
+      return raw?.map((e) => e as String).toList() ?? const [];
+    }
+
     return Ticket(
       id: id,
       title: fm['title'] as String,
@@ -155,6 +178,8 @@ class Ticket {
       body: sections.isNotEmpty ? sections[0] : '',
       comments: sections.length > 1 ? sections.sublist(1) : const [],
       links: links,
+      milestones: parseStringList('milestones'),
+      labels: parseStringList('labels'),
     );
   }
 

packages/kanban/lib/src/ticket_store.dart

@@ -15,6 +15,8 @@ class TicketStore {
     required String type,
     required String column,
     String body = '',
+    List<String> milestones = const [],
+    List<String> labels = const [],
   }) async {
     final columnDir = Directory(p.join(kanbanDir, column));
     await columnDir.create(recursive: true);
@@ -27,6 +29,8 @@ class TicketStore {
       created: DateTime.now().toUtc(),
       body: body,
       comments: const [],
+      milestones: milestones,
+      labels: labels,
     );
     await File(p.join(columnDir.path, '$id.md')).writeAsString(ticket.toFileContent());
     return ticket;
@@ -146,11 +150,20 @@ class TicketStore {
     String? type,
     String? column,
     String? body,
+    List<String>? milestones,
+    List<String>? labels,
   }) async {
     final found = await _findTicketFile(id);
     if (found == null) throw ArgumentError('Ticket $id not found.');
     final ticket = Ticket.fromFileContent(id, await found.file.readAsString(), found.column);
-    final updated = ticket.copyWith(title: title, type: type, column: column, body: body);
+    final updated = ticket.copyWith(
+      title: title,
+      type: type,
+      column: column,
+      body: body,
+      milestones: milestones,
+      labels: labels,
+    );
     if (column != null && column != ticket.column) {
       // Column changed — move the file to the new column directory.
       await found.file.delete();

packages/kanban/test/dew_kanban_test.dart

@@ -198,6 +198,38 @@ dew:
       );
       expect(t.toFileContent(), isNot(contains('links:')));
     });
+
+    test('milestones and labels roundtrip serialisation', () {
+      final t = Ticket(
+        id: 'TEST-0005',
+        title: 'Tagged',
+        type: 'task',
+        column: 'todo',
+        created: DateTime.utc(2026, 1, 5),
+        body: '',
+        comments: const [],
+        milestones: ['v1.0', 'beta'],
+        labels: ['good first issue', 'backend'],
+      );
+      final parsed = Ticket.fromFileContent(t.id, t.toFileContent(), t.column);
+      expect(parsed.milestones, ['v1.0', 'beta']);
+      expect(parsed.labels, ['good first issue', 'backend']);
+    });
+
+    test('no milestones/labels fields when empty', () {
+      final t = Ticket(
+        id: 'TEST-0006',
+        title: 'Plain',
+        type: 'task',
+        column: 'todo',
+        created: DateTime.utc(2026, 1, 6),
+        body: '',
+        comments: const [],
+      );
+      final content = t.toFileContent();
+      expect(content, isNot(contains('milestones:')));
+      expect(content, isNot(contains('labels:')));
+    });
   });
 
   group('TicketStore', () {
@@ -235,6 +267,37 @@ dew:
       expect(await store.findById('TEST-0099'), isNull);
     });
 
+    test('create and list milestones/labels persist via store', () async {
+      final store = makeStore();
+      await store.create(
+        title: 'Tagged',
+        type: 'task',
+        column: 'todo',
+        milestones: ['v1.0'],
+        labels: ['enhancement'],
+      );
+      await store.create(title: 'Plain', type: 'task', column: 'todo');
+      final all = await store.list();
+      expect(all[0].milestones, ['v1.0']);
+      expect(all[0].labels, ['enhancement']);
+      expect(all[1].milestones, isEmpty);
+      expect(all[1].labels, isEmpty);
+    });
+
+    test('update patches milestones and labels', () async {
+      final store = makeStore();
+      await store.create(
+        title: 'Tagged',
+        type: 'task',
+        column: 'todo',
+        milestones: ['v1.0'],
+        labels: ['old'],
+      );
+      final updated = await store.update('TEST-0001', labels: ['new']);
+      expect(updated.milestones, ['v1.0']);
+      expect(updated.labels, ['new']);
+    });
+
     test('list returns sorted tickets', () async {
       final store = makeStore();
       await store.create(title: 'A', type: 'task', column: 'todo');