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+---
+title: Becca Lyria
+---
+
+Becca Lyria (hereinafter the "Application") is an AI-powered Discord bot that provides an interactive text-based role-playing game experience through direct messages. The bot utilizes Anthropic's Claude AI to create dynamic, personalized RPG adventures for users.
+
+## 1. User Documentation
+
+This section is for those interacting with a live instance of the Application.
+
+### Overview
+
+Becca Lyria is a user-installable Discord bot that transforms your DMs into an immersive text-based RPG experience. Acting as a wise mage named Becca with a cold and calculating personality, the bot serves as your personal dungeon master, weaving interactive stories that adapt to your choices and actions.
+
+### Getting Started
+
+1. **Installation**: [Add Becca Lyria to your Discord account](https://discord.com/oauth2/authorize?client_id=1343341112437248041)
+2. **Subscription**: The bot requires an active subscription to use its features
+3. **Start Playing**: Use the `/start` command to begin your adventure
+
+### Available Commands
+
+- **`/start`** - Start a new RPG scenario. Becca will create a fresh adventure and send it to your DMs
+- **`/about`** - Learn more about the bot, including version information and useful links
+- **`/clear`** - Clear your current adventure history to start fresh
+
+### How to Play
+
+1. Send Becca a `/start` command to begin a new adventure
+2. Once the story begins in your DMs, simply respond naturally to continue the narrative
+3. The bot maintains conversation history (up to 20 messages) to provide context-aware responses
+4. Use `/clear` to reset your adventure history when you want to start over
+5. The bot supports free-form text adventures - you can attempt any action you can imagine
+
+### Features
+
+- **AI-Powered Storytelling**: Powered by Claude 3.5 Sonnet for rich, dynamic narratives
+- **Conversation Memory**: Maintains context from recent messages for coherent storytelling
+- **Free-Form Gameplay**: No restrictive multiple choice options - express your actions naturally
+- **Personalized Experience**: The bot adapts to your playstyle and incorporates your Discord display name
+- **Privacy-Focused**: All gameplay happens in private DMs
+
+### Subscription Model
+
+Becca Lyria operates on a premium subscription model through Discord's monetization system. Users must have an active subscription to access the bot's RPG features.
+
+## 2. Technical Documentation
+
+This section is for those interested in running their own instance of the Application.
+
+### Architecture Overview
+
+Becca Lyria is built as a modern Discord bot using TypeScript and several key technologies:
+
+**Core Technologies:**
+- **Node.js/TypeScript**: Main runtime and development language
+- **Discord.js**: Discord API interaction library
+- **Anthropic SDK**: Integration with Claude AI models
+- **Fastify**: Web server for health monitoring
+- **PNPM**: Package management
+
+**AI Integration:**
+- **Provider**: Anthropic Claude (claude-3-5-sonnet-latest for conversations, claude-sonnet-4-20250514 for story starts)
+- **Context Management**: Maintains up to 20 messages of conversation history
+- **Personality System**: Configurable personality traits for consistent character behavior
+
+### Project Structure
+
+```
+src/
+├── index.ts              # Main entry point and Discord client setup
+├── commands/             # Slash command definitions
+│   ├── about.ts
+│   ├── clear.ts
+│   └── start.ts
+├── config/
+│   └── personality.ts    # AI personality configuration
+├── events/
+│   └── message.ts        # Direct message event handling
+├── modules/              # Command implementation logic
+│   ├── about.ts
+│   ├── clear.ts
+│   └── start.ts
+├── server/
+│   └── serve.ts          # Health monitoring web server
+└── utils/                # Utility functions
+    ├── ai.ts             # Anthropic client configuration
+    ├── calculateCost.ts  # Usage cost tracking
+    ├── isSubscribed.ts   # Subscription verification
+    ├── logger.ts         # Logging utility
+    └── replyToError.ts   # Error handling
+```
+
+### Environment Variables
+
+The application requires several environment variables:
+
+- `DISCORD_TOKEN`: Discord bot token
+- `AI_TOKEN`: Anthropic API key
+- `LOG_TOKEN`: Logging service token (optional)
+
+### Key Features Implementation
+
+**Subscription System:**
+- Integrates with Discord's premium features
+- SKU ID: `1343347225698500744`
+- Entitlement checking for both interactions and messages
+- Special bypass for bot owner (ID: `465650873650118659`)
+
+**Conversation Management:**
+- Fetches last 20 messages from DM channel
+- Supports history clearing with special `<Clear History>` marker
+- Converts message history to Anthropic's message format
+- Maintains role context (user vs assistant)
+
+**Error Handling:**
+- Comprehensive error logging with custom logger
+- Graceful error responses to users
+- Unhandled rejection and exception catching
+
+**Cost Tracking:**
+- Monitors AI usage with token counting
+- Calculates costs based on Anthropic pricing (input: $3/1M tokens, output: $15/1M tokens)
+- Logs usage statistics per user
+
+### Development Setup
+
+1. **Prerequisites**: Node.js, PNPM
+2. **Installation**: `pnpm install`
+3. **Build**: `pnpm run build`
+4. **Development**: Configure environment variables in `dev.env`
+5. **Production**: Configure environment variables in `prod.env`
+6. **Start**: `pnpm start` (requires 1Password CLI for env injection)
+
+### Deployment Considerations
+
+- Web server runs on port 5010 for health checks
+- Requires Discord bot permissions for DMs and message content
+- Needs stable Anthropic API access
+- Logging integration with nhcarrigan logging service
+
+## 3. Legal Documentation
+
+:::note
+This section is coming soon!
+:::
+
+This section is for expansions to our legal policies specific to the Application.
+
+## 4. Contributing Documentation
+
+This section is for documentation related to contributing to the Application's codebase.
+
+### Development Standards
+
+**Code Quality:**
+- TypeScript with strict configuration
+- ESLint with @nhcarrigan/eslint-config
+- Maximum function length limits enforced
+- Comprehensive JSDoc documentation required
+
+**Testing:**
+- Vitest framework configured
+- Istanbul coverage reporting
+- Currently no tests implemented (placeholder exists)
+
+**Licensing:**
+- Licensed under Naomi's Public License
+- Copyright held by Naomi Carrigan
+- See LICENSE.md for full terms
+
+### Contribution Process
+
+1. **Issues**: Report bugs and request features through GitHub issues
+2. **Pull Requests**: Fork, develop, and submit PRs for review
+3. **Code Review**: All changes require review before merging
+4. **Guidelines**: Follow established [contributing guidelines](CONTRIBUTING.md)
+5. **Conduct**: Adhere to [Code of Conduct](CODE_OF_CONDUCT.md)
+
+### Development Workflow
+
+**Commands:**
+- `pnpm run build`: Compile TypeScript to production JavaScript
+- `pnpm run lint`: Run ESLint with zero warnings tolerance
+- `pnpm run test`: Run test suite (currently placeholder)
+- `pnpm start`: Start production build with environment injection
+
+**Architecture Patterns:**
+- Event-driven Discord bot architecture
+- Modular command system with separate definition and implementation
+- Utility-first approach for common functionality
+- Separation of concerns between commands, events, and business logic
+
+### Contact Information
+
+- **Chat Server**: [http://chat.nhcarrigan.com](http://chat.nhcarrigan.com)
+- **Email**: contact@nhcarrigan.com
+- **Source Code**: [https://git.nhcarrigan.com/nhcarrigan/becca-lyria](https://git.nhcarrigan.com/nhcarrigan/becca-lyria)
+- **Documentation**: [https://docs.nhcarrigan.com/](https://docs.nhcarrigan.com/)
diff --git a/src/events/message.ts b/src/events/message.ts
index 681b9c3..e275ea4 100644
--- a/src/events/message.ts
+++ b/src/events/message.ts
@@ -61,7 +61,7 @@ export const onMessage = async(message: Message): Promise<void> => {
       // eslint-disable-next-line @typescript-eslint/naming-convention -- Required key format for SDK.
       max_tokens:  5000,
       messages:    context,
-      model:       "claude-3-5-sonnet-latest",
+      model:       "claude-sonnet-4-20250514",
       system:      `${personality} Provide a response to the user that continues the story. The user's name is ${message.author.displayName}`,
       temperature: 1,
     });