- Remove all AI tools (weather, create/update document, suggestions)
- Remove all agent definitions (tutor, quiz master, planner, analyst)
- Remove custom artifacts (flashcard, study-plan)
- Simplify prompts to basic chat without tool routing
- Keep UI components with placeholder types for rendering
- Exclude tempfiles from TypeScript compilation

- Add lib/ai/tools/get-weather.ts with geocoding support
- Update route.ts to import and use weather tool
- Add stepCountIs for multi-step tool conversations
- Add experimental_activeTools for reasoning model compatibility
- Update types.ts to use InferUITool for weather tool

- Add lib/ai/agents/ directory with types and index
- Add tutor agent that explains concepts with examples
- Update route.ts to import and register tutor agent
- Update types.ts with tutor tool type inference

- Add lib/ai/agents/quiz-master.ts with TODO placeholder
- Add lib/ai/agents/planner.ts with TODO placeholder
- Add lib/ai/agents/analyst.ts with TODO placeholder
- Update index.ts with commented exports for Chapter 3

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Co-Authored-By: Claude <noreply@anthropic.com>

- Show full geocodeCity implementation
- Update route.ts example with stepCountIs, experimental_activeTools
- Fix Weather component props to match API response
- Update flow diagram to show city name lookup

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Co-Authored-By: Claude <noreply@anthropic.com>

- CHAPTER-0: Updated to show createUIMessageStream pattern, full useChat
  config with transport, correct systemPrompt signature
- CHAPTER-2: Fixed agent types (UIMessageStreamWriter), gateway.languageModel
  pattern, tutor params (depth/context), route handler structure
- CHAPTER-3: Rewrote quiz-master and planner to show artifact creation with
  dataStream.write(), correct models (artifact-model), DB save, error handling
- CHAPTER-4: Fixed CustomUIDataTypes, added focusAreas param, artifact-model
- CHAPTER-5: Added analyst.ts to file structure, fixed inputSchema usage,
  updated architecture diagrams, added analyst to orchestrator tools

All code snippets are now copy-paste ready and match the actual implementation.

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Co-Authored-By: Claude <noreply@anthropic.com>

- Updated system prompt section to show updating regularPrompt constant
- Updated route handler to show correct systemPrompt({ selectedChatModel, requestHints })

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Co-Authored-By: Claude <noreply@anthropic.com>

- Add agentRoutingPrompt with tutor agent description
- Update systemPrompt to include routing for non-reasoning models

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>