diff --git a/README.md b/README.md
index bfe4ece..5c9cc0b 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Rituals is a paid, offline-first habit tracker built around customizable "ritual
 ### Rituals Tab
 - View all active rituals
 - Create new rituals from scratch or browse preset library
-- 13 categorized presets (Health, Productivity, Mindfulness, Self-Care)
+- 14 categorized presets (Health, Productivity, Mindfulness, Self-Care)
 - Full ritual management: edit, enable/disable, archive, delete
 - Drag-to-reorder habits within rituals
 
@@ -91,7 +91,7 @@ This project follows Clean Architecture and protocol-first design:
 - **Views**: SwiftUI UI only, no business logic
 - **State**: @Observable stores with app logic
 - **Services**: Stateless logic and data seeding
-- **Models**: SwiftData models and plain structs
+- **Models**: SwiftData models and plain structs. The architecture is built around **Ritual Arcs**, allowing rituals to be renewed while preserving historical accuracy.
 - **Protocols**: Abstractions for stores/services
 
 ## Project Structure
@@ -102,7 +102,8 @@ Andromida/
 │   ├── App/
 │   │   ├── Models/                  # SwiftData + DTOs
 │   │   │   ├── Ritual.swift
-│   │   │   ├── Habit.swift
+│   │   │   ├── RitualArc.swift
+│   │   │   ├── ArcHabit.swift
 │   │   │   ├── HabitCompletion.swift
 │   │   │   ├── InsightCard.swift
 │   │   │   ├── Milestone.swift
@@ -116,6 +117,7 @@ Andromida/
 │   │   │   └── RitualSeedService.swift
 │   │   ├── State/                   # @Observable stores
 │   │   │   ├── RitualStore.swift
+│   │   │   ├── CategoryStore.swift
 │   │   │   └── SettingsStore.swift
 │   │   └── Views/                   # SwiftUI features + components
 │   │       ├── Today/
@@ -141,9 +143,10 @@ Andromida/
 
 ## Data Model
 
-- **Ritual**: Title, theme, start date, duration (days), notes, habits, isEnabled, isArchived, timeOfDay, iconName, category
-- **Habit**: Title, symbol, completedDayIDs
-- **Milestone**: Day, title, symbol, isAchieved
+- **Ritual**: Title, theme, notes, defaultDurationDays, timeOfDay, iconName, category, sortIndex, arcs (relationship)
+- **RitualArc**: Start date, end date, arc number, isActive, habits (relationship)
+- **ArcHabit**: Title, symbolName, goal, completedDayIDs, sortIndex
+- **Milestone**: Day, title, symbolName, isAchieved
 - **Settings**: Stored via Bedrock CloudSyncManager (NSUbiquitousKeyValueStore)
 
 ## Bedrock Integration
@@ -152,17 +155,17 @@ Andromida/
 - **Branding**: AppLaunchView, AppIconConfig, LaunchScreenConfig
 - **Settings UI**: SettingsToggle, SettingsSlider, SettingsSegmentedPicker, SettingsCard
 - **Cloud Sync**: iCloud sync for settings using CloudSyncManager
-- **Onboarding**: Sherpa walkthrough system
+- **Onboarding**: Custom `SetupWizardView` flow (Sherpa integration pending)
 
 ## Localization
 
-String catalogs are used for English, Spanish (Mexico), and French (Canada):
+String catalogs are used for English (en), Spanish (es-MX), and French (fr-CA):
 
 - `Andromida/Andromida/App/Localization/Localizable.xcstrings`
 
 ## Requirements
 
-- iOS 18.0+
+- iOS 18.6+
 - Swift 5 (Bedrock requires Swift 6 in package; app builds under Swift 5 with modern concurrency)
 
 ## Running