diff --git a/CLAUDE.md b/CLAUDE.md
index 59a8481..225140b 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -8,9 +8,9 @@ KittieMobile is an ADHD-friendly task manager with a virtual pet companion. User
 - **State Management**: Riverpod 3.x (`flutter_riverpod` + `riverpod_annotation` + `riverpod_generator`)
 - **Local Database**: Drift 2.x (SQLite, offline-first; mirrors the PostgreSQL schema)
 - **Animations**: Rive 0.14.x (pet animations via `.riv` files in `assets/animations/`)
-- **Navigation**: go_router 14.x+
+- **Navigation**: go_router 17.x
 - **Fonts**: Google Fonts (Lexend, Atkinson Hyperlegible)
-- **Notifications**: flutter_local_notifications 17.x+
+- **Notifications**: flutter_local_notifications 21.x
 - **Remote Sync**: `http` package to backend REST API at `localhost:8090`
 
 ## Architecture
@@ -118,7 +118,7 @@ Energy levels: `1` = low, `2` = medium, `3` = high
 - drift: ^2.22.0 (2.32.0)
 - drift_flutter: ^0.2.0 (0.3.0)
 - drift_dev: ^2.22.0 (2.32.0)
-- go_router: ^14.0.0 (17.1.0 latest, constraint allows resolution to latest compatible)
+- go_router: ^17.0.0 (17.1.0)
 - rive: ^0.14.0 (0.14.4)
 - google_fonts: ^8.0.0 (8.0.2)
-- flutter_local_notifications: ^17.0.0 (21.0.0 latest)
+- flutter_local_notifications: ^21.0.0 (21.0.0)
diff --git a/analysis_options.yaml b/analysis_options.yaml
index 0d29021..dbc49bd 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -9,6 +9,10 @@
 # packages, and plugins designed to encourage good coding practices.
 include: package:flutter_lints/flutter.yaml
 
+analyzer:
+  plugins:
+    - custom_lint
+
 linter:
   # The lint rules applied to this project can be customized in the
   # section below to disable rules from the `package:flutter_lints/flutter.yaml`
diff --git a/pubspec.lock b/pubspec.lock
index 7a05a09..3503b1d 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -314,34 +314,42 @@ packages:
     dependency: "direct dev"
     description:
       name: flutter_lints
-      sha256: "5398f14efa795ffb7a33e9b6a08798b26a180edac4ad7db3f231e40f82ce11e1"
+      sha256: "3105dc8492f6183fb076ccf1f351ac3d60564bff92e20bfc4af9cc1651f4e7e1"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0"
+    version: "6.0.0"
   flutter_local_notifications:
     dependency: "direct main"
     description:
       name: flutter_local_notifications
-      sha256: "674173fd3c9eda9d4c8528da2ce0ea69f161577495a9cc835a2a4ecd7eadeb35"
+      sha256: "0d9035862236fe38250fe1644d7ed3b8254e34a21b2c837c9f539fbb3bba5ef1"
       url: "https://pub.dev"
     source: hosted
-    version: "17.2.4"
+    version: "21.0.0"
   flutter_local_notifications_linux:
     dependency: transitive
     description:
       name: flutter_local_notifications_linux
-      sha256: c49bd06165cad9beeb79090b18cd1eb0296f4bf4b23b84426e37dd7c027fc3af
+      sha256: e0f25e243c6c44c825bbbc6b2b2e76f7d9222362adcfe9fd780bf01923c840bd
       url: "https://pub.dev"
     source: hosted
-    version: "4.0.1"
+    version: "8.0.0"
   flutter_local_notifications_platform_interface:
     dependency: transitive
     description:
       name: flutter_local_notifications_platform_interface
-      sha256: "85f8d07fe708c1bdcf45037f2c0109753b26ae077e9d9e899d55971711a4ea66"
+      sha256: e7db3d5b49c2b7ecc68deba4aaaa67a348f92ee0fef34c8e4b4459dbef0d7307
       url: "https://pub.dev"
     source: hosted
-    version: "7.2.0"
+    version: "11.0.0"
+  flutter_local_notifications_windows:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_windows
+      sha256: "3a2654ba104fbb52c618ebed9def24ef270228470718c43b3a6afcd5c81bef0c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
   flutter_riverpod:
     dependency: "direct main"
     description:
@@ -388,10 +396,10 @@ packages:
     dependency: "direct main"
     description:
       name: go_router
-      sha256: f02fd7d2a4dc512fec615529824fdd217fecb3a3d3de68360293a551f21634b3
+      sha256: "7974313e217a7771557add6ff2238acb63f635317c35fa590d348fb238f00896"
       url: "https://pub.dev"
     source: hosted
-    version: "14.8.1"
+    version: "17.1.0"
   google_fonts:
     dependency: "direct main"
     description:
@@ -484,10 +492,10 @@ packages:
     dependency: transitive
     description:
       name: lints
-      sha256: c35bb79562d980e9a453fc715854e1ed39e24e7d0297a880ef54e17f9874a9d7
+      sha256: "12f842a479589fea194fe5c5a3095abc7be0c1f2ddfa9a0e76aed1dbd26a87df"
       url: "https://pub.dev"
     source: hosted
-    version: "5.1.1"
+    version: "6.1.0"
   logging:
     dependency: transitive
     description:
@@ -961,10 +969,10 @@ packages:
     dependency: transitive
     description:
       name: timezone
-      sha256: "2236ec079a174ce07434e89fcd3fcda430025eb7692244139a9cf54fdcf1fc7d"
+      sha256: "784a5e34d2eb62e1326f24d6f600aaaee452eb8ca8ef2f384a59244e292d158b"
       url: "https://pub.dev"
     source: hosted
-    version: "0.9.4"
+    version: "0.11.0"
   typed_data:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index bc421bd..c90a931 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -26,10 +26,10 @@ dependencies:
   google_fonts: ^8.0.0
 
   # Navigation
-  go_router: ^14.0.0
+  go_router: ^17.0.0
 
   # Notifications
-  flutter_local_notifications: ^17.0.0
+  flutter_local_notifications: ^21.0.0
 
   # Storage
   path_provider: ^2.1.0
@@ -44,7 +44,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  flutter_lints: ^5.0.0
+  flutter_lints: ^6.0.0
   build_runner: ^2.4.0
   riverpod_generator: ^4.0.0
   drift_dev: ^2.22.0