Deus Customization

This skill helps users add capabilities or modify behavior. Use AskUserQuestion to understand what they want before making changes.

Workflow

1. Understand the request - Ask clarifying questions
2. Plan the changes - Identify files to modify. If an installer skill exists for the request (e.g., /add-telegram for adding Telegram), tell the user to run it themselves instead of implementing manually (/add-* setup skills are user-invoked and cannot be triggered programmatically).
3. Implement - Make changes directly to the code
4. Test guidance - Tell user how to verify

Key Files

File	Purpose
src/index.ts	Orchestrator: state, message loop, agent invocation
src/channels/whatsapp.ts	WhatsApp connection, auth, send/receive
src/ipc.ts	IPC watcher and task processing
src/router.ts	Message formatting and outbound routing
src/types.ts	TypeScript interfaces (includes Channel)
src/config.ts	Assistant name, trigger pattern, directories
src/db.ts	Database initialization and queries
src/whatsapp-auth.ts	Standalone WhatsApp authentication script
groups/CLAUDE.md	Global memory/persona

Common Customization Patterns

Adding a New Input Channel (e.g., Telegram, Slack, Email)

Questions to ask:

• Which channel? (Telegram, Slack, Discord, email, SMS, etc.)
• Same trigger word or different?
• Same memory hierarchy or separate?
• Should messages from this channel go to existing groups or new ones?

Implementation pattern:

1. Create src/channels/{name}.ts implementing the Channel interface from src/types.ts (see src/channels/whatsapp.ts for reference)
2. Add the channel instance to main() in src/index.ts and wire callbacks (onMessage, onChatMetadata)
3. Messages are stored via the onMessage callback; routing is automatic via ownsJid()

Adding a New MCP Integration

Questions to ask:

• What service? (Calendar, Notion, database, etc.)
• What operations needed? (read, write, both)
• Which groups should have access?

Implementation:

1. Add MCP server config to the container settings (see src/container-runner.ts for how MCP servers are mounted)
2. Document available tools in groups/CLAUDE.md

Changing Assistant Behavior

Questions to ask:

• What aspect? (name, trigger, persona, response style)
• Apply to all groups or specific ones?

Simple changes → edit src/config.ts Persona changes → edit groups/CLAUDE.md Per-group behavior → edit specific group's CLAUDE.md

Adding New Commands

Questions to ask:

• What should the command do?
• Available in all groups or main only?
• Does it need new MCP tools?

Implementation:

1. Commands are handled by the agent naturally — add instructions to groups/CLAUDE.md or the group's CLAUDE.md
2. For trigger-level routing changes, modify processGroupMessages() in src/index.ts

Changing Deployment

Questions to ask:

• Target platform? (Linux server, Docker, different Mac)
• Service manager? (systemd, Docker, supervisord)

Implementation:

1. Create appropriate service files
2. Update paths in config
3. Provide setup instructions

After Changes

Always tell the user:

# Rebuild and restart
npm run build
# macOS:
launchctl unload ~/Library/LaunchAgents/com.deus.plist
launchctl load ~/Library/LaunchAgents/com.deus.plist
# Linux:
# systemctl --user restart deus

Example Interaction

User: "Add Telegram as an input channel"

1. Ask: "Should Telegram use the same @Deus trigger, or a different one?"
2. Ask: "Should Telegram messages create separate conversation contexts, or share with WhatsApp groups?"
3. Create src/channels/telegram.ts implementing the Channel interface (see src/channels/whatsapp.ts)
4. Add the channel to main() in src/index.ts
5. Tell user how to authenticate and test