add tools

PLAN.md

@@ -1,870 +0,0 @@
-# AI Agent Development Plan - Refined Strategy
-
-## Overview
-
-Iterative AI-driven game development system using **browser-native TypeScript architecture** with streaming AI agents for real-time VibeGame game modification and self-correcting feedback loops.
-
-## Current Status
-
-**Phase 1 - Foundation COMPLETED** ✅
-
-- ✅ WebSocket server integrated with Vite
-- ✅ HuggingFace Inference API connected
-- ✅ Real-time streaming chat interface
-- ✅ Agent state management with Svelte stores
-- ✅ Bidirectional communication working
-
-**Next: Tool Implementation** 🚀
-
-## Core Strategy: Small, Testable Iterations
-
-### Guiding Principles
-
-1. **Start Ultra-Simple** - First tool in ~10 lines of code
-2. **Test Continuously** - Every iteration delivers testable value
-3. **Fail Visibly** - Errors shown immediately in UI
-4. **Incremental Complexity** - Add features one at a time
-5. **User-Centric Progress** - Each day delivers visible improvement
-
-### Development Phases
-
-- **Week 1**: Make it Work (basic tools)
-- **Week 2**: Make it Good (error handling)
-- **Week 3**: Make it Fast (optimization)
-
-## Architecture Evolution
-
-### Current Architecture (Simple)
-
-```
-Browser → WebSocket → Agent → Tools → Stores → UI
-```
-
-### Target Architecture (Advanced)
-
-```
-Browser → SSE/WebSocket → Composite Agent System → MCP Tools → Stores → UI
-                               ├── Base Model (Complex reasoning)
-                               ├── Quick Edit Model (Fast edits)
-                               └── AutoFix Model (Error correction)
-```
-
-## Implementation Phases
-
-### Phase 1: Minimal Viable Tools (Days 1-7)
-
-**Goal:** Agent can read and edit game code
-
-#### Day 1: First Tool - Read Game Code
-
-- [ ] Create `src/lib/tools/registry.ts` with simple tool interface
-- [ ] Implement `read-game-code.ts` (returns editor content)
-- [ ] Update agent-runner to detect tool calls
-- **Test:** "What's in the game?" → Agent describes scene
-
-#### Day 2: Tool Execution
-
-- [ ] Parse tool requests from agent responses
-- [ ] Execute tools and return results
-- [ ] Add tool context to agent
-- **Test:** Agent accurately describes game elements
-
-#### Day 3: Edit Game Code
-
-- [ ] Implement `edit-game-code.ts` with string replacement
-- [ ] Connect to editor store
-- [ ] Basic XML validation
-- **Test:** "Add a red box" → Box appears
-
-#### Day 4: Console Reading
-
-- [ ] Implement `read-console.ts`
-- [ ] Filter and format messages
-- **Test:** Agent reports console errors
-
-#### Day 5-6: Tool Chaining
-
-- [ ] Multiple tools per response
-- [ ] Simple sequencing
-- [ ] Context preservation
-- **Test:** Multi-step operations work
-
-#### Day 7: Testing & Stabilization
-
-- [ ] Fix discovered bugs
-- [ ] Improve error messages
-- [ ] Add logging
-- **Success Metrics:**
-  - ✅ Agent can describe game content
-  - ✅ Agent can add/modify elements
-  - ✅ Agent can read console
-  - ✅ 5 basic operations work reliably
-
-### Phase 2: Error Detection & Correction (Days 8-14)
-
-**Goal:** Agent detects and fixes simple errors
-
-#### Day 8: Error Pattern Recognition
-
-- [ ] Parse common VibeGame errors
-- [ ] Categorize: syntax, physics, missing components
-- **Test:** Agent identifies "no ground" error
-
-#### Day 9: Simple Self-Correction
-
-- [ ] Single retry on error
-- [ ] Generate fix attempts
-- **Test:** Agent adds missing ground
-
-#### Day 10: Undo/Redo
-
-- [ ] Edit history in editor store
-- [ ] Rollback on failure
-- **Test:** Failed edits can be undone
-
-#### Day 11: Validation Tool
-
-- [ ] Check required components
-- [ ] Pre-validate changes
-- **Test:** Prevents invalid states
-
-#### Day 12-13: Better Prompting
-
-- [ ] VibeGame-specific examples
-- [ ] Few-shot learning
-- **Test:** Higher first-attempt success
-
-#### Day 14: Polish
-
-- [ ] Clear error messages
-- [ ] Better explanations
-- **Success Metrics:**
-  - ✅ Agent detects common errors
-  - ✅ Agent fixes simple mistakes
-  - ✅ Edit history prevents data loss
-  - ✅ 80% success rate on common tasks
-
-### Phase 3: Advanced Features (Days 15-21)
-
-**Goal:** Faster, smarter, more capable
-
-#### Day 15: Code-Based Tools
-
-- [ ] Agent generates TypeScript for tools
-- [ ] Controlled execution environment
-- **Test:** More flexible tool usage
-
-#### Day 16: Streaming Improvements
-
-- [ ] Migrate to Server-Sent Events (SSE)
-- [ ] Real-time tool visualization
-- **Test:** Better feedback
-
-#### Day 17: Quick Edit Model
-
-- [ ] Route simple edits to Qwen3-Coder-7B
-- [ ] Instant text/color changes
-- **Test:** Sub-second simple edits
-
-#### Day 18: Context Management
-
-- [ ] Sliding window for long chats
-- [ ] Iteration summarization
-- **Test:** 50+ message sessions
-
-#### Day 19: Template System
-
-- [ ] Pre-built game templates
-- [ ] Quick start patterns
-- **Test:** "Make a platformer" works
-
-#### Day 20: Thinking Visualization
-
-- [ ] Show reasoning process
-- [ ] Chain-of-thought UI
-- **Test:** Users understand logic
-
-#### Day 21: Final Polish
-
-- [ ] Performance optimization
-- [ ] Documentation
-- **Success Metrics:**
-  - ✅ Sub-second simple edits
-  - ✅ Complex multi-step tasks work
-  - ✅ Users understand process
-  - ✅ Production-ready quality
-
-## Tool Specifications
-
-### Core Tool Interface (MCP-Compatible)
-
-```typescript
-interface Tool {
-  name: string;
-  description: string;
-  execute: (params: any) => Promise<ToolResult>;
-}
-
-interface ToolResult {
-  success: boolean;
-  data?: any;
-  error?: string;
-}
-```
-
-### Initial Tool Set
-
-1. **read_game_code** - Get current editor content
-2. **edit_game_code** - Modify via search/replace
-3. **read_console** - Get console messages
-4. **validate_game** - Check VibeGame rules
-
-### Future Tools
-
-5. **list_entities** - Get all scene entities
-6. **add_entity** - Add new entity
-7. **remove_entity** - Delete entity
-8. **test_physics** - Simulate and check
-9. **reset_game** - Restart scene
-
-## Model Strategy
-
-### Phase 1: Single Model
-
-- **Primary:** DeepSeek-R1-Distill-Qwen-1.5B (current)
-- Simple prompting, basic tool use
-
-### Phase 2: Fallback Chain
-
-- **Primary:** DeepSeek-R1-Distill
-- **Fallback:** Qwen3-Coder-7B
-- Error recovery and retry logic
-
-### Phase 3: Composite System
-
-- **Complex Tasks:** ERNIE-4.5-21B-A3B-Thinking (128K context)
-- **Quick Edits:** Qwen3-Coder-7B-Instruct
-- **Error Fix:** Dedicated correction model
-- **Streaming Post-Processor:** Real-time validation
-
-## Key Improvements from Research
-
-### From v0/Vercel
-
-- Composite model architecture
-- Streaming post-processing
-- Quick edit optimization
-- Real-time error correction
-
-### From Smolagents
-
-- Code-based tools (TypeScript instead of JSON)
-- Direct execution without translation
-- Simpler debugging
-
-### From Modern Thinking Models
-
-- 128K context windows
-- Chain-of-thought reasoning
-- Sparse MoE activation (3B active params)
-
-### From MCP/Agentic Web
-
-- Standardized tool protocols
-- Browser-native execution
-- SSE for streaming
-- Direct store integration
-
-## Testing Strategy
-
-### Unit Tests
-
-- Individual tool validation
-- Mock stores for isolation
-
-### Integration Tests
-
-- Full flow: request → tools → response
-- Multi-tool sequences
-- Error recovery
-
-### User Tests
-
-- "Add jumping platforms"
-- "Fix the bouncing balls"
-- "Create a coin collector"
-
-## Deployment
-
-### Environment Variables
-
-```env
-HF_TOKEN=<user_token>
-MODEL_PRIMARY=deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B
-MODEL_QUICK=Qwen/Qwen3-Coder-7B-Instruct
-MAX_ITERATIONS=10
-ITERATION_TIMEOUT=30000
-PORT=7860
-```
-
-### Single Container (HuggingFace Spaces)
-
-```dockerfile
-FROM oven/bun:1-alpine
-WORKDIR /app
-COPY package.json bun.lockb ./
-RUN bun install --frozen-lockfile
-COPY . .
-RUN bun run build
-EXPOSE 7860
-CMD ["bun", "run", "preview", "--host", "0.0.0.0", "--port", "7860"]
-```
-
-## Implementation Details
-
-### Tool System Architecture
-
-#### Pattern Recognition in Agent Responses
-
-The agent will naturally include tool calls in its responses using a simple pattern:
-
-```
-[TOOL: tool_name {"param": "value"}]
-```
-
-Example agent response:
-
-```
-I'll check what's currently in your game.
-
-[TOOL: read_game_code]
-
-Based on the code, I can see you have a ground platform and a red ball...
-```
-
-#### Complete Tool Registry Implementation
-
-```typescript
-// src/lib/tools/registry.ts - FULL CODE TO CREATE
-
-export interface Tool {
-  name: string;
-  description: string;
-  execute: (params: any) => Promise<ToolResult>;
-}
-
-export interface ToolResult {
-  success: boolean;
-  data?: any;
-  error?: string;
-}
-
-export interface ToolCall {
-  tool: string;
-  parameters?: any;
-}
-
-class ToolRegistry {
-  private tools: Map<string, Tool> = new Map();
-
-  register(tool: Tool) {
-    if (this.tools.has(tool.name)) {
-      console.warn(`Tool ${tool.name} already registered, overwriting`);
-    }
-    this.tools.set(tool.name, tool);
-    console.log(`Registered tool: ${tool.name}`);
-  }
-
-  async execute(toolName: string, params?: any): Promise<ToolResult> {
-    const tool = this.tools.get(toolName);
-
-    if (!tool) {
-      return {
-        success: false,
-        error: `Tool '${toolName}' not found. Available: ${Array.from(this.tools.keys()).join(", ")}`,
-      };
-    }
-
-    try {
-      console.log(`Executing tool: ${toolName}`, params);
-      const result = await tool.execute(params);
-      console.log(`Tool ${toolName} result:`, result);
-      return result;
-    } catch (error) {
-      console.error(`Tool ${toolName} error:`, error);
-      return {
-        success: false,
-        error: error instanceof Error ? error.message : "Unknown error",
-      };
-    }
-  }
-
-  getTools(): Tool[] {
-    return Array.from(this.tools.values());
-  }
-
-  getToolNames(): string[] {
-    return Array.from(this.tools.keys());
-  }
-
-  getToolDescriptions(): string {
-    return Array.from(this.tools.values())
-      .map((tool) => `- ${tool.name}: ${tool.description}`)
-      .join("\n");
-  }
-}
-
-// Global registry instance
-export const toolRegistry = new ToolRegistry();
-
-// Helper function to parse tool calls from agent response
-export function parseToolCalls(response: string): ToolCall[] {
-  const toolCalls: ToolCall[] = [];
-
-  // Pattern: [TOOL: tool_name] or [TOOL: tool_name {"param": "value"}]
-  const toolPattern = /\[TOOL:\s*(\w+)(?:\s+({[^}]+}))?\]/g;
-
-  let match;
-  while ((match = toolPattern.exec(response)) !== null) {
-    const toolName = match[1];
-    const paramsStr = match[2];
-
-    let parameters = undefined;
-    if (paramsStr) {
-      try {
-        parameters = JSON.parse(paramsStr);
-      } catch (e) {
-        console.warn(`Failed to parse tool parameters: ${paramsStr}`);
-      }
-    }
-
-    toolCalls.push({ tool: toolName, parameters });
-  }
-
-  return toolCalls;
-}
-
-// Helper to format tool results for agent context
-export function formatToolResult(toolName: string, result: ToolResult): string {
-  if (result.success) {
-    return `[TOOL_RESULT: ${toolName}]\n${JSON.stringify(result.data, null, 2)}\n[/TOOL_RESULT]`;
-  } else {
-    return `[TOOL_ERROR: ${toolName}]\n${result.error}\n[/TOOL_ERROR]`;
-  }
-}
-```
-
-#### Tool Implementation Examples
-
-**read-game-code.ts** (Ultra-simple first tool):
-
-```typescript
-import { editorStore } from "$lib/stores/editor";
-import { get } from "svelte/store";
-
-export const readGameCodeTool: Tool = {
-  name: "read_game_code",
-  description: "Get the current game code from the editor",
-  execute: async () => {
-    const state = get(editorStore);
-    return {
-      success: true,
-      data: {
-        content: state.content,
-        language: state.language,
-      },
-    };
-  },
-};
-```
-
-**edit-game-code.ts** (Simple string replacement):
-
-```typescript
-export const editGameCodeTool: Tool = {
-  name: "edit_game_code",
-  description: "Edit game code using search and replace",
-  execute: async (params: { search: string; replace: string }) => {
-    const state = get(editorStore);
-    const newContent = state.content.replace(params.search, params.replace);
-    editorStore.setContent(newContent);
-    return {
-      success: true,
-      data: { modified: true, newContent },
-    };
-  },
-};
-```
-
-#### Agent Runner Updates
-
-Add to `src/lib/server/agent-runner.ts`:
-
-```typescript
-import { parseToolCalls, toolRegistry, formatToolResult } from '../tools/registry';
-
-async processMessage(message: string, onStream?: (chunk: string) => void) {
-  // ... existing code ...
-
-  // After getting response, check for tool calls
-  const toolCalls = parseToolCalls(fullResponse);
-
-  if (toolCalls.length > 0) {
-    // Execute tools and add results to context
-    for (const call of toolCalls) {
-      const result = await toolRegistry.execute(call.tool, call.parameters);
-      const formatted = formatToolResult(call.tool, result);
-
-      // Add to message history for context
-      this.messageHistory.push({
-        id: this.generateId(),
-        role: 'system',
-        content: formatted,
-        timestamp: Date.now()
-      });
-    }
-
-    // Continue conversation with tool results
-    // (In phase 2, we'll make this recursive for self-correction)
-  }
-}
-```
-
-#### System Prompt Enhancement
-
-```typescript
-const systemPrompt = `You are an AI assistant helping to build games with VibeGame.
-
-Available tools:
-${toolRegistry.getToolDescriptions()}
-
-To use a tool, include in your response: [TOOL: tool_name {"param": "value"}]
-
-Example:
-- To read game code: [TOOL: read_game_code]
-- To edit: [TOOL: edit_game_code {"search": "old text", "replace": "new text"}]
-
-Always validate changes and ensure the game remains playable.
-Use small, incremental changes rather than large rewrites.`;
-```
-
-### Testing Scenarios
-
-#### Phase 1 Test Cases
-
-1. **"What's in the game?"**
-   - Expected: Agent uses `read_game_code`, describes scene elements
-
-2. **"Add a blue box at position 5,2,0"**
-   - Expected: Agent uses `edit_game_code` to insert `<dynamic-part>`
-
-3. **"Change the ball color to green"**
-   - Expected: Agent finds and replaces color attribute
-
-4. **"What errors are in the console?"**
-   - Expected: Agent uses `read_console` tool
-
-5. **"Check the code and fix any issues"**
-   - Expected: Agent chains multiple tools
-
-### Current File Structure
-
-```
-src/lib/
-├── server/
-│   ├── agent-runner.ts  (✅ exists - needs tool integration)
-│   └── api.ts           (✅ exists - WebSocket handler)
-├── tools/
-│   └── (empty directory - needs implementation)
-└── stores/
-    ├── agent.ts         (✅ exists)
-    ├── editor.ts        (✅ exists)
-    ├── console.ts       (✅ exists)
-    ├── game.ts          (✅ exists)
-    └── ui.ts            (✅ exists)
-```
-
-### Target File Structure After Implementation
-
-```
-src/lib/
-├── server/
-│   ├── agent-runner.ts  (updated with tool execution)
-│   └── api.ts           (existing WebSocket handler)
-├── tools/
-│   ├── registry.ts      (to create)
-│   ├── read-game-code.ts (to create)
-│   ├── edit-game-code.ts (to create)
-│   ├── read-console.ts  (to create)
-│   └── index.ts        (to create - exports all tools)
-└── stores/
-    └── (all existing)
-```
-
-## Next Immediate Steps
-
-1. ✅ Update PLAN.md with implementation details
-2. ⏳ Create tool registry (`src/lib/tools/registry.ts`)
-3. ⏳ Implement read-game-code tool
-4. ⏳ Update agent-runner for tool execution
-5. ⏳ Test in UI with "What's in the game?"
-
-## Success Criteria
-
-### Week 1
-
-- [ ] Basic tools working
-- [ ] Agent can modify games
-- [ ] Console feedback visible
-
-### Week 2
-
-- [ ] Error detection working
-- [ ] Self-correction attempts
-- [ ] Higher success rate
-
-### Week 3
-
-- [ ] Fast response times
-- [ ] Advanced features
-- [ ] Production ready
-
-## Model Configuration Details
-
-### HuggingFace Inference API Setup
-
-#### Available Models (via Serverless API)
-
-```typescript
-// Phase 1: Simple model
-const MODELS = {
-  primary: "deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B",
-
-  // Phase 2: Fallback chain
-  fallback: "Qwen/Qwen2.5-Coder-7B-Instruct",
-
-  // Phase 3: Thinking models (require special handling)
-  thinking: {
-    ernie: "baidu/ERNIE-4.5-21B-A3B-Thinking", // Apache 2.0, 128K context
-    qwen: "Qwen/Qwen3-Next-80B-A3B-Thinking", // Longer thinking chains
-  },
-};
-```
-
-#### Thinking Model Integration
-
-For thinking models, parse and display reasoning:
-
-```typescript
-// Response may contain thinking process
-const thinkingPattern = /<thinking>(.*?)<\/thinking>/s;
-const match = response.match(thinkingPattern);
-if (match) {
-  // Store thinking for UI display
-  const thinking = match[1];
-  // Extract actual response
-  const answer = response.replace(thinkingPattern, "");
-}
-```
-
-### Advanced Features Implementation
-
-#### Server-Sent Events (SSE) Migration
-
-Replace WebSocket with SSE for simpler streaming:
-
-```typescript
-// src/lib/server/sse.ts
-export function createSSEStream(req: Request) {
-  const stream = new ReadableStream({
-    start(controller) {
-      controller.enqueue('data: {"type":"connected"}\n\n');
-    },
-    async pull(controller) {
-      // Stream agent responses
-      const chunk = await getNextChunk();
-      controller.enqueue(`data: ${JSON.stringify(chunk)}\n\n`);
-    },
-  });
-
-  return new Response(stream, {
-    headers: {
-      "Content-Type": "text/event-stream",
-      "Cache-Control": "no-cache",
-      Connection: "keep-alive",
-    },
-  });
-}
-```
-
-#### Code-Based Tool Execution (Smolagents-inspired)
-
-Allow agent to write TypeScript code for tools:
-
-```typescript
-// Agent generates code like:
-const code = `
-  const editor = await tools.readGameCode();
-  const content = editor.data.content;
-  const modified = content.replace('color="#ff0000"', 'color="#00ff00"');
-  await tools.editGameCode({ search: content, replace: modified });
-  return "Changed red to green";
-`;
-
-// Execute in sandboxed context
-const sandbox = {
-  tools: toolRegistry,
-  console: { log: (...args) => consoleStore.addMessage("log", args.join(" ")) },
-};
-const result = await executeInSandbox(code, sandbox);
-```
-
-#### Composite Model Router
-
-Route requests based on complexity:
-
-```typescript
-class ModelRouter {
-  async route(message: string, context: AgentMessage[]): Promise<string> {
-    const complexity = this.assessComplexity(message);
-
-    if (complexity === "simple") {
-      // Text changes, color modifications
-      return this.quickEditModel(message);
-    } else if (complexity === "complex") {
-      // Multi-step reasoning, debugging
-      return this.thinkingModel(message);
-    } else {
-      // Default
-      return this.primaryModel(message);
-    }
-  }
-
-  private assessComplexity(message: string): "simple" | "medium" | "complex" {
-    // Simple heuristics
-    if (message.match(/change|color|text|rename/i)) return "simple";
-    if (message.match(/debug|fix|error|why/i)) return "complex";
-    return "medium";
-  }
-}
-```
-
-## Common Patterns & Solutions
-
-### Pattern: Adding Game Elements
-
-```typescript
-// User: "Add a platform at 0,3,0"
-// Agent response with tool:
-`I'll add a platform at position 0,3,0 for you.
-
-[TOOL: edit_game_code {"search": "</world>", "replace": "  <static-part pos=\"0 3 0\" shape=\"box\" size=\"3 0.5 3\" color=\"#808080\"></static-part>\n</world>"}]
-
-I've added a gray platform at position (0, 3, 0).`;
-```
-
-### Pattern: Debugging Errors
-
-```typescript
-// User: "The player keeps falling"
-// Agent workflow:
-1. [TOOL: read_game_code] - Check for ground
-2. [TOOL: read_console] - Check for physics errors
-3. Identify: No ground platform
-4. [TOOL: edit_game_code] - Add ground
-5. [TOOL: validate_game] - Verify fix
-```
-
-### Pattern: Complex Modifications
-
-```typescript
-// User: "Make this into a platformer"
-// Agent uses template:
-const platformerTemplate = `
-  <!-- Platforms -->
-  <static-part pos="-5 2 0" shape="box" size="3 0.5 3" color="#808080"></static-part>
-  <static-part pos="0 4 0" shape="box" size="3 0.5 3" color="#808080"></static-part>
-  <static-part pos="5 6 0" shape="box" size="3 0.5 3" color="#808080"></static-part>
-  
-  <!-- Moving platform -->
-  <kinematic-part pos="0 3 5" shape="box" size="4 0.5 4" color="#4169e1">
-    <tween target="body.pos-x" from="-10" to="10" duration="5" loop="ping-pong"></tween>
-  </kinematic-part>
-`;
-```
-
-## Troubleshooting Guide
-
-### Issue: Agent doesn't use tools
-
-**Solution**: Enhance system prompt with examples
-
-```typescript
-const systemPrompt = `
-IMPORTANT: You have tools available. Use them!
-
-Examples of when to use tools:
-- User asks "what's in the game?" → Use [TOOL: read_game_code]
-- User says "add a box" → Use [TOOL: edit_game_code]
-- User mentions "error" → Use [TOOL: read_console]
-`;
-```
-
-### Issue: Tool execution fails
-
-**Solution**: Add error recovery
-
-```typescript
-try {
-  const result = await tool.execute(params);
-  if (!result.success) {
-    // Retry with adjusted parameters
-    const adjusted = this.adjustParameters(params, result.error);
-    return await tool.execute(adjusted);
-  }
-} catch (error) {
-  // Fallback to manual instruction
-  return {
-    success: false,
-    error: `Tool failed. Manual fix: ${this.getManualInstructions(tool.name)}`,
-  };
-}
-```
-
-### Issue: Context overflow
-
-**Solution**: Implement sliding window
-
-```typescript
-class ContextManager {
-  private maxTokens = 4000;
-
-  summarize(messages: AgentMessage[]): AgentMessage[] {
-    if (this.countTokens(messages) < this.maxTokens) {
-      return messages;
-    }
-
-    // Keep system, first user, and last N messages
-    const summary = this.createSummary(messages.slice(1, -5));
-    return [
-      messages[0], // system
-      { role: "system", content: `Previous conversation summary: ${summary}` },
-      ...messages.slice(-5), // recent context
-    ];
-  }
-}
-```
-
-## Resources
-
-- [HuggingFace Inference API](https://huggingface.co/docs/api-inference/index)
-- [MCP Specification](https://modelcontextprotocol.io/specification)
-- [VibeGame Docs](llms.txt)
-- [Smolagents](https://github.com/huggingface/smolagents)
-- [AI SDK](https://ai-sdk.dev)
-- [ERNIE-4.5 Model](https://huggingface.co/baidu/ERNIE-4.5-21B-A3B-Thinking)
-- [Qwen3-Next Model](https://huggingface.co/Qwen/Qwen3-Next-80B-A3B-Thinking)
-
----
-
-_This plan provides a complete roadmap for implementing an AI agent system for VibeGame game development. Start with Phase 1 for immediate value, then progressively add sophistication. Each iteration is designed to be completed in hours, not days, with immediate testing in the UI._

bun.lock

@@ -6,8 +6,10 @@
       "dependencies": {
         "@huggingface/hub": "^2.6.3",
         "@huggingface/inference": "^4.8.0",
+        "@types/marked": "^6.0.0",
         "@types/node": "^24.3.3",
         "gsap": "^3.13.0",
+        "marked": "^16.2.1",
         "monaco-editor": "^0.50.0",
         "svelte-splitpanes": "^8.0.5",
         "vibegame": "^0.1.1",
@@ -15,6 +17,7 @@
       "devDependencies": {
         "@eslint/js": "^9.33.0",
         "@sveltejs/vite-plugin-svelte": "^3.1.1",
+        "@types/bun": "^1.2.21",
         "@types/ws": "^8.18.1",
         "@typescript-eslint/eslint-plugin": "^8.40.0",
         "@typescript-eslint/parser": "^8.40.0",
@@ -180,16 +183,22 @@
 
     "@sveltejs/vite-plugin-svelte-inspector": ["@sveltejs/[email protected]", "", { "dependencies": { "debug": "^4.3.4" }, "peerDependencies": { "@sveltejs/vite-plugin-svelte": "^3.0.0", "svelte": "^4.0.0 || ^5.0.0-next.0", "vite": "^5.0.0" } }, "sha512-9QX28IymvBlSCqsCll5t0kQVxipsfhFFL+L2t3nTWfXnddYwxBuAEtTtlaVQpRz9c37BhJjltSeY4AJSC03SSg=="],
 
+    "@types/bun": ["@types/[email protected]", "", { "dependencies": { "bun-types": "1.2.21" } }, "sha512-NiDnvEqmbfQ6dmZ3EeUO577s4P5bf4HCTXtI6trMc6f6RzirY5IrF3aIookuSpyslFzrnvv2lmEWv5HyC1X79A=="],
+
     "@types/estree": ["@types/[email protected]", "", {}, "sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w=="],
 
     "@types/json-schema": ["@types/[email protected]", "", {}, "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA=="],
 
     "@types/json5": ["@types/[email protected]", "", {}, "sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ=="],
 
+    "@types/marked": ["@types/[email protected]", "", { "dependencies": { "marked": "*" } }, "sha512-jmjpa4BwUsmhxcfsgUit/7A9KbrC48Q0q8KvnY107ogcjGgTFDlIL3RpihNpx2Mu1hM4mdFQjoVc4O6JoGKHsA=="],
+
     "@types/node": ["@types/[email protected]", "", { "dependencies": { "undici-types": "~7.10.0" } }, "sha512-GKBNHjoNw3Kra1Qg5UXttsY5kiWMEfoHq2TmXb+b1rcm6N7B3wTrFYIf/oSZ1xNQ+hVVijgLkiDZh7jRRsh+Gw=="],
 
     "@types/pug": ["@types/[email protected]", "", {}, "sha512-Sk/uYFOBAB7mb74XcpizmH0KOR2Pv3D2Hmrh1Dmy5BmK3MpdSa5kqZcg6EKBdklU0bFXX9gCfzvpnyUehrPIuA=="],
 
+    "@types/react": ["@types/[email protected]", "", { "dependencies": { "csstype": "^3.0.2" } }, "sha512-hHkbU/eoO3EG5/MZkuFSKmYqPbSVk5byPFa3e7y/8TybHiLMACgI8seVYlicwk7H5K/rI2px9xrQp/C+AUDTiQ=="],
+
     "@types/ws": ["@types/[email protected]", "", { "dependencies": { "@types/node": "*" } }, "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg=="],
 
     "@typescript-eslint/eslint-plugin": ["@typescript-eslint/[email protected]", "", { "dependencies": { "@eslint-community/regexpp": "^4.10.0", "@typescript-eslint/scope-manager": "8.43.0", "@typescript-eslint/type-utils": "8.43.0", "@typescript-eslint/utils": "8.43.0", "@typescript-eslint/visitor-keys": "8.43.0", "graphemer": "^1.4.0", "ignore": "^7.0.0", "natural-compare": "^1.4.0", "ts-api-utils": "^2.1.0" }, "peerDependencies": { "@typescript-eslint/parser": "^8.43.0", "eslint": "^8.57.0 || ^9.0.0", "typescript": ">=4.8.4 <6.0.0" } }, "sha512-8tg+gt7ENL7KewsKMKDHXR1vm8tt9eMxjJBYINf6swonlWgkYn5NwyIgXpbbDxTNU5DgpDFfj95prcTq2clIQQ=="],
@@ -258,6 +267,8 @@
 
     "buffer-crc32": ["[email protected]", "", {}, "sha512-Db1SbgBS/fg/392AblrMJk97KggmvYhr4pB5ZIMTWtaivCPMWLkmb7m21cJvpvgK+J3nsU2CmmixNBZx4vFj/w=="],
 
+    "bun-types": ["[email protected]", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-sa2Tj77Ijc/NTLS0/Odjq/qngmEPZfbfnOERi0KRUYhT9R8M4VBioWVmMWE5GrYbKMc+5lVybXygLdibHaqVqw=="],
+
     "call-bind": ["[email protected]", "", { "dependencies": { "call-bind-apply-helpers": "^1.0.0", "es-define-property": "^1.0.0", "get-intrinsic": "^1.2.4", "set-function-length": "^1.2.2" } }, "sha512-oKlSFMcMwpUg2ednkhQ454wfWiU/ul3CkJe/PEHcTKuiX6RpbehUiFMXu13HalGZxfUwCQzZG747YXBn1im9ww=="],
 
     "call-bind-apply-helpers": ["[email protected]", "", { "dependencies": { "es-errors": "^1.3.0", "function-bind": "^1.1.2" } }, "sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ=="],
@@ -284,6 +295,8 @@
 
     "css-tree": ["[email protected]", "", { "dependencies": { "mdn-data": "2.0.30", "source-map-js": "^1.0.1" } }, "sha512-6Fv1DV/TYw//QF5IzQdqsNDjx/wc8TrMBZsqjL9eW01tWb7R7k/mq+/VXfJCl7SoD5emsJop9cOByJZfs8hYIw=="],
 
+    "csstype": ["[email protected]", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
+
     "data-view-buffer": ["[email protected]", "", { "dependencies": { "call-bound": "^1.0.3", "es-errors": "^1.3.0", "is-data-view": "^1.0.2" } }, "sha512-EmKO5V3OLXh1rtK2wgXRansaK1/mtVdTUEiEI0W8RkvgT05kfxaH29PliLnpLP73yYO6142Q72QNa8Wx/A5CqQ=="],
 
     "data-view-byte-length": ["[email protected]", "", { "dependencies": { "call-bound": "^1.0.3", "es-errors": "^1.3.0", "is-data-view": "^1.0.2" } }, "sha512-tuhGbE6CfTM9+5ANGf+oQb72Ky/0+s3xKUpHvShfiz2RxMFgFPjsXuRLBVMtvMs15awe45SRb83D6wH4ew6wlQ=="],
@@ -526,6 +539,8 @@
 
     "magic-string": ["[email protected]", "", { "dependencies": { "@jridgewell/sourcemap-codec": "^1.5.5" } }, "sha512-2N21sPY9Ws53PZvsEpVtNuSW+ScYbQdp4b9qUaL+9QkHUrGFKo56Lg9Emg5s9V/qrtNBmiR01sYhUOwu3H+VOw=="],
 
+    "marked": ["[email protected]", "", { "bin": { "marked": "bin/marked.js" } }, "sha512-r3UrXED9lMlHF97jJByry90cwrZBBvZmjG1L68oYfuPMW+uDTnuMbyJDymCWwbTE+f+3LhpNDKfpR3a3saFyjA=="],
+
     "math-intrinsics": ["[email protected]", "", {}, "sha512-/IXtbwEk5HTPyEwyKX6hGkYXxM9nbj64B+ilVJnC/R6B0pH5G4V3b0pVbL7DBj4tkhBAppbQUlf6F6Xl9LHu1g=="],
 
     "mdn-data": ["[email protected]", "", {}, "sha512-GaqWWShW4kv/G9IEucWScBx9G1/vsFZZJUO+tD26M8J8z3Kw5RDQjaoZe03YAClgeS/SWPOcb4nkFBTEi5DUEA=="],

index.html

@@ -3,7 +3,8 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>🥕 VibeGame</title>
+    <link rel="icon" href="/favicon.ico" />
+    <title>VibeGame</title>
     <style>
       body {
         margin: 0;

package.json

@@ -20,6 +20,7 @@
   "devDependencies": {
     "@eslint/js": "^9.33.0",
     "@sveltejs/vite-plugin-svelte": "^3.1.1",
+    "@types/bun": "^1.2.21",
     "@types/ws": "^8.18.1",
     "@typescript-eslint/eslint-plugin": "^8.40.0",
     "@typescript-eslint/parser": "^8.40.0",
@@ -37,8 +38,10 @@
   "dependencies": {
     "@huggingface/hub": "^2.6.3",
     "@huggingface/inference": "^4.8.0",
+    "@types/marked": "^6.0.0",
     "@types/node": "^24.3.3",
     "gsap": "^3.13.0",
+    "marked": "^16.2.1",
     "monaco-editor": "^0.50.0",
     "svelte-splitpanes": "^8.0.5",
     "vibegame": "^0.1.1"

src/lib/components/chat/ChatPanel.svelte

@@ -3,6 +3,9 @@
     import { agentStore, isConnected, isProcessing } from "../../stores/agent";
     import { authStore } from "../../services/auth";
     import gsap from "gsap";
+    import ReasoningBlock from "./ReasoningBlock.svelte";
+    import MarkdownRenderer from "./MarkdownRenderer.svelte";
+    import ToolCallDisplay from "./ToolCallDisplay.svelte";
 
     let inputValue = "";
     let messagesContainer: HTMLDivElement;
@@ -12,6 +15,40 @@
 
     let hasConnected = false;
 
+    const TOOL_PATTERN = /\[TOOL:\s*(\w+)(?:\s+({[^}]+}))?\]/g;
+
+    function parseMessageContent(content: string) {
+        const parts: Array<{ type: 'text' | 'tool', content: string, toolName?: string, params?: any }> = [];
+        let lastIndex = 0;
+
+        const matches = Array.from(content.matchAll(TOOL_PATTERN));
+        
+        for (const match of matches) {
+            const [fullMatch, toolName, paramsStr] = match;
+            const index = match.index!;
+            
+            if (index > lastIndex) {
+                parts.push({ type: 'text', content: content.slice(lastIndex, index) });
+            }
+            
+            let params = null;
+            if (paramsStr) {
+                try {
+                    params = JSON.parse(paramsStr);
+                } catch {}
+            }
+            
+            parts.push({ type: 'tool', content: fullMatch, toolName, params });
+            lastIndex = index + fullMatch.length;
+        }
+        
+        if (lastIndex < content.length) {
+            parts.push({ type: 'text', content: content.slice(lastIndex) });
+        }
+        
+        return parts.length > 0 ? parts : [{ type: 'text' as const, content }];
+    }
+
     onMount(() => {
         if ($authStore.isAuthenticated && !$authStore.loading) {
             agentStore.connect();
@@ -162,10 +199,24 @@
             {/if}
             {#each $agentStore.messages as message}
                 <div class="message {message.role}">
+                    {#if message.reasoning && message.role === "assistant"}
+                        <ReasoningBlock reasoning={message.reasoning} />
+                    {/if}
                     <div class="message-content">
-                        {message.content.trim()}
-                        {#if message.streaming}
-                            <span class="cursor">▊</span>
+                        {#if message.role === "assistant"}
+                            {@const parts = parseMessageContent(message.content.trim())}
+                            {#each parts as part}
+                                {#if part.type === 'text' && part.content.trim()}
+                                    <MarkdownRenderer content={part.content} streaming={false} />
+                                {:else if part.type === 'tool' && part.toolName}
+                                    <ToolCallDisplay toolName={part.toolName} parameters={part.params} />
+                                {/if}
+                            {/each}
+                            {#if message.streaming}
+                                <span class="cursor">▊</span>
+                            {/if}
+                        {:else}
+                            {message.content.trim()}
                         {/if}
                     </div>
                 </div>
@@ -232,7 +283,7 @@
     .message {
         padding: 0.4rem 0.6rem;
         border-radius: 3px;
-        font-size: 0.75rem;
+        font-size: 0.875rem;
         animation: fadeIn 0.2s ease-out;
     }
 
@@ -260,13 +311,16 @@
     }
 
     .message-content {
+        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Monaco", "Menlo", monospace;
+        margin: 0;
+        display: block;
+    }
+
+    .message.user .message-content {
         color: rgba(255, 255, 255, 0.9);
         line-height: 1.5;
         white-space: pre-line;
         word-wrap: break-word;
-        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Monaco", "Menlo", monospace;
-        margin: 0;
-        display: block;
     }
 
     .cursor {
@@ -290,7 +344,7 @@
         border-radius: 3px;
         padding: 0.4rem 0.6rem;
         color: #ff9999;
-        font-size: 0.75rem;
+        font-size: 0.875rem;
         animation: fadeIn 0.2s ease-out;
     }
 
@@ -311,7 +365,7 @@
         padding: 0.4rem 0.6rem;
         resize: none;
         font-family: "Monaco", "Menlo", monospace;
-        font-size: 0.8rem;
+        font-size: 0.875rem;
         line-height: 1.2;
     }
 
@@ -408,7 +462,7 @@
 
     .ready-message {
         color: rgba(255, 255, 255, 0.2);
-        font-size: 0.75rem;
+        font-size: 0.875rem;
         text-align: center;
         font-style: italic;
         display: flex;

src/lib/components/chat/MarkdownRenderer.svelte

@@ -0,0 +1,188 @@
+<script lang="ts">
+    import { marked } from "marked";
+
+    export let content: string;
+    export let streaming: boolean = false;
+
+    let htmlContent = "";
+
+    const renderer = new marked.Renderer();
+    
+    renderer.code = ({ text, lang }) => {
+        const language = lang || "text";
+        return `<pre><code class="language-${language}">${escapeHtml(text)}</code></pre>`;
+    };
+
+    renderer.link = ({ href, title, tokens }) => {
+        const firstToken = tokens?.[0];
+        const text = (firstToken && 'text' in firstToken) ? firstToken.text : '';
+        return `<a href="${href}" target="_blank" rel="noopener noreferrer" title="${title || text}">${text}</a>`;
+    };
+
+    function escapeHtml(text: string): string {
+        const div = document.createElement("div");
+        div.textContent = text;
+        return div.innerHTML;
+    }
+
+    marked.setOptions({
+        renderer,
+        breaks: true,
+        gfm: true,
+    });
+
+    $: if (content) {
+        try {
+            htmlContent = marked.parse(content) as string;
+        } catch {
+            htmlContent = escapeHtml(content);
+        }
+    }
+</script>
+
+<div class="markdown-content">
+    {@html htmlContent}
+    {#if streaming}
+        <span class="cursor">▊</span>
+    {/if}
+</div>
+
+<style>
+    .markdown-content {
+        color: rgba(255, 255, 255, 0.9);
+        line-height: 1.6;
+        word-wrap: break-word;
+    }
+
+    .markdown-content :global(p) {
+        margin: 0 0 0.5rem 0;
+    }
+
+    .markdown-content :global(p:last-child) {
+        margin-bottom: 0;
+    }
+
+    .markdown-content :global(h1),
+    .markdown-content :global(h2),
+    .markdown-content :global(h3),
+    .markdown-content :global(h4),
+    .markdown-content :global(h5),
+    .markdown-content :global(h6) {
+        margin: 0.75rem 0 0.5rem 0;
+        font-weight: 600;
+        color: rgba(255, 255, 255, 1);
+    }
+
+    .markdown-content :global(h1) {
+        font-size: 1.25rem;
+    }
+
+    .markdown-content :global(h2) {
+        font-size: 1.125rem;
+    }
+
+    .markdown-content :global(h3) {
+        font-size: 1rem;
+    }
+
+    .markdown-content :global(pre) {
+        background: rgba(0, 0, 0, 0.4);
+        border: 1px solid rgba(255, 255, 255, 0.1);
+        border-radius: 4px;
+        padding: 0.75rem;
+        margin: 0.5rem 0;
+        overflow-x: auto;
+    }
+
+    .markdown-content :global(code) {
+        font-family: "Monaco", "Menlo", "Consolas", monospace;
+        font-size: 0.85rem;
+        background: rgba(0, 0, 0, 0.3);
+        padding: 0.125rem 0.25rem;
+        border-radius: 3px;
+        color: rgba(255, 210, 30, 0.9);
+    }
+
+    .markdown-content :global(pre code) {
+        background: none;
+        padding: 0;
+        color: rgba(255, 255, 255, 0.9);
+    }
+
+    .markdown-content :global(ul),
+    .markdown-content :global(ol) {
+        margin: 0.5rem 0;
+        padding-left: 1.5rem;
+    }
+
+    .markdown-content :global(li) {
+        margin: 0.25rem 0;
+    }
+
+    .markdown-content :global(blockquote) {
+        border-left: 3px solid rgba(255, 255, 255, 0.3);
+        padding-left: 0.75rem;
+        margin: 0.5rem 0;
+        color: rgba(255, 255, 255, 0.7);
+        font-style: italic;
+    }
+
+    .markdown-content :global(a) {
+        color: rgba(65, 105, 225, 0.9);
+        text-decoration: none;
+        border-bottom: 1px solid transparent;
+        transition: border-color 0.2s;
+    }
+
+    .markdown-content :global(a:hover) {
+        border-bottom-color: rgba(65, 105, 225, 0.5);
+    }
+
+    .markdown-content :global(strong) {
+        font-weight: 600;
+        color: rgba(255, 255, 255, 1);
+    }
+
+    .markdown-content :global(em) {
+        font-style: italic;
+    }
+
+    .markdown-content :global(hr) {
+        border: none;
+        border-top: 1px solid rgba(255, 255, 255, 0.1);
+        margin: 1rem 0;
+    }
+
+    .markdown-content :global(table) {
+        border-collapse: collapse;
+        width: 100%;
+        margin: 0.5rem 0;
+    }
+
+    .markdown-content :global(th),
+    .markdown-content :global(td) {
+        border: 1px solid rgba(255, 255, 255, 0.1);
+        padding: 0.5rem;
+        text-align: left;
+    }
+
+    .markdown-content :global(th) {
+        background: rgba(0, 0, 0, 0.3);
+        font-weight: 600;
+    }
+
+    .cursor {
+        animation: blink 1s infinite;
+    }
+
+    @keyframes blink {
+        0%,
+        50% {
+            opacity: 1;
+        }
+        51%,
+        100% {
+            opacity: 0;
+        }
+    }
+</style>

src/lib/components/chat/ReasoningBlock.svelte

@@ -0,0 +1,237 @@
+<script lang="ts">
+    import { onMount } from "svelte";
+    import gsap from "gsap";
+    
+    export let reasoning: string;
+    export let isExpanded = false;
+    
+    let iconElement: HTMLSpanElement;
+    let contentElement: HTMLDivElement;
+    
+    function toggleExpanded() {
+        isExpanded = !isExpanded;
+        
+        if (!iconElement || !contentElement) return;
+        
+        if (isExpanded) {
+            // Expand - quick but smooth
+            gsap.to(iconElement, {
+                rotation: 180,
+                duration: 0.15,
+                ease: "power2.out"
+            });
+            
+            // Show content
+            gsap.set(contentElement, { 
+                display: 'block'
+            });
+            
+            gsap.fromTo(contentElement, {
+                opacity: 0,
+                maxHeight: 0,
+                y: -10
+            }, {
+                opacity: 1,
+                maxHeight: 500, // Large enough for content
+                y: 0,
+                duration: 0.2,
+                ease: "power2.out"
+            });
+            
+        } else {
+            // Collapse - nearly instant
+            gsap.to(iconElement, {
+                rotation: 0,
+                duration: 0.1,
+                ease: "power2.in"
+            });
+            
+            gsap.to(contentElement, {
+                opacity: 0,
+                maxHeight: 0,
+                y: -5,
+                duration: 0.1,
+                ease: "power2.in",
+                onComplete: () => {
+                    gsap.set(contentElement, { display: 'none' });
+                }
+            });
+        }
+    }
+    
+    onMount(() => {
+        if (iconElement) {
+            gsap.set(iconElement, {
+                transformOrigin: "center",
+                rotation: isExpanded ? 180 : 0
+            });
+        }
+        
+        if (contentElement) {
+            gsap.set(contentElement, {
+                display: isExpanded ? 'block' : 'none',
+                opacity: isExpanded ? 1 : 0,
+                maxHeight: isExpanded ? 500 : 0,
+                y: isExpanded ? 0 : -10
+            });
+        }
+    });
+</script>
+
+<div class="reasoning-block">
+    <button 
+        class="reasoning-toggle"
+        on:click={toggleExpanded}
+        title={isExpanded ? "Hide AI thinking" : "Show AI thinking"}
+        aria-expanded={isExpanded}
+        aria-label="Toggle thinking visibility"
+    >
+        <div class="toggle-content">
+            <span bind:this={iconElement} class="toggle-icon">
+                <svg width="12" height="12" viewBox="0 0 12 12" fill="currentColor">
+                    <path d="M3 4.5L6 7.5L9 4.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" fill="none"/>
+                </svg>
+            </span>
+            <span class="toggle-label">
+                <span class="label-main">Thinking</span>
+                <span class="label-hint">{isExpanded ? "Click to hide" : "Click to view"}</span>
+            </span>
+        </div>
+    </button>
+    
+    <div 
+        bind:this={contentElement}
+        class="reasoning-content"
+    >
+        <div class="content-inner">
+            <pre class="reasoning-text">{reasoning}</pre>
+        </div>
+    </div>
+</div>
+
+<style>
+    .reasoning-block {
+        margin: 0.75rem 0;
+        border-radius: 8px;
+        background: linear-gradient(135deg, rgba(70, 70, 80, 0.15) 0%, rgba(60, 60, 70, 0.15) 100%);
+        border: 1px solid rgba(120, 120, 140, 0.15);
+        overflow: hidden;
+        transition: border-color 0.2s ease, background 0.2s ease;
+    }
+    
+    .reasoning-block:hover {
+        border-color: rgba(140, 140, 160, 0.25);
+        background: linear-gradient(135deg, rgba(75, 75, 85, 0.2) 0%, rgba(65, 65, 75, 0.2) 100%);
+    }
+    
+    .reasoning-toggle {
+        width: 100%;
+        padding: 0.75rem 1rem;
+        background: transparent;
+        border: none;
+        color: rgba(255, 255, 255, 0.7);
+        cursor: pointer;
+        font-family: inherit;
+        text-align: left;
+        transition: all 0.2s ease;
+    }
+    
+    .reasoning-toggle:hover {
+        background: rgba(255, 255, 255, 0.03);
+        color: rgba(255, 255, 255, 0.9);
+    }
+    
+    .reasoning-toggle:focus-visible {
+        outline: 2px solid rgba(140, 140, 200, 0.5);
+        outline-offset: -2px;
+    }
+    
+    .toggle-content {
+        display: flex;
+        align-items: center;
+        gap: 0.75rem;
+    }
+    
+    .toggle-icon {
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        width: 20px;
+        height: 20px;
+        border-radius: 4px;
+        background: rgba(255, 255, 255, 0.05);
+        color: rgba(255, 255, 255, 0.5);
+        transition: background 0.2s ease, color 0.2s ease;
+    }
+    
+    .reasoning-toggle:hover .toggle-icon {
+        background: rgba(255, 255, 255, 0.08);
+        color: rgba(255, 255, 255, 0.7);
+    }
+    
+    .toggle-label {
+        display: flex;
+        flex-direction: column;
+        gap: 0.125rem;
+    }
+    
+    .label-main {
+        font-size: 0.875rem;
+        font-weight: 500;
+        letter-spacing: 0.01em;
+    }
+    
+    .label-hint {
+        font-size: 0.7rem;
+        color: rgba(255, 255, 255, 0.4);
+        transition: color 0.2s ease;
+    }
+    
+    .reasoning-toggle:hover .label-hint {
+        color: rgba(255, 255, 255, 0.5);
+    }
+    
+    .reasoning-content {
+        border-top: 1px solid rgba(100, 100, 100, 0.15);
+        background: rgba(30, 30, 35, 0.3);
+        overflow: hidden;
+    }
+    
+    .content-inner {
+        padding: 0.75rem 1rem;
+    }
+    
+    .reasoning-text {
+        margin: 0;
+        padding: 0.75rem;
+        background: rgba(20, 20, 25, 0.4);
+        border-radius: 6px;
+        font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
+        font-size: 0.75rem;
+        line-height: 1.5;
+        color: rgba(255, 255, 255, 0.6);
+        white-space: pre-wrap;
+        word-wrap: break-word;
+        max-height: 350px;
+        overflow-y: auto;
+    }
+    
+    .reasoning-text::-webkit-scrollbar {
+        width: 8px;
+    }
+    
+    .reasoning-text::-webkit-scrollbar-track {
+        background: rgba(30, 30, 35, 0.5);
+        border-radius: 4px;
+    }
+    
+    .reasoning-text::-webkit-scrollbar-thumb {
+        background: rgba(100, 100, 110, 0.4);
+        border-radius: 4px;
+        transition: background 0.2s ease;
+    }
+    
+    .reasoning-text::-webkit-scrollbar-thumb:hover {
+        background: rgba(120, 120, 130, 0.5);
+    }
+</style>

src/lib/components/chat/ToolCallDisplay.svelte

@@ -0,0 +1,89 @@
+<script lang="ts">
+    import { onMount } from "svelte";
+    import gsap from "gsap";
+
+    export let toolName: string;
+    export let parameters: any = null;
+
+    let element: HTMLDivElement;
+
+    onMount(() => {
+        gsap.fromTo(
+            element,
+            { opacity: 0, scale: 0.9, y: -5 },
+            { opacity: 1, scale: 1, y: 0, duration: 0.3, ease: "back.out(1.5)" }
+        );
+    });
+
+    const toolIcons: Record<string, string> = {
+        read_game_code: "📄",
+        edit_game_code: "✏️",
+        read_console: "📟",
+        clear_console: "🧹",
+        run_game: "▶️",
+        stop_game: "⏹",
+        default: "🔧",
+    };
+
+    $: icon = toolIcons[toolName] || toolIcons.default;
+</script>
+
+<div class="tool-call" bind:this={element}>
+    <span class="tool-icon">{icon}</span>
+    <span class="tool-name">{toolName}</span>
+    {#if parameters && Object.keys(parameters).length > 0}
+        <span class="tool-params">
+            {#each Object.entries(parameters) as [key, value]}
+                <span class="param">
+                    <span class="param-key">{key}:</span>
+                    <span class="param-value">{typeof value === 'string' && value.length > 20 ? value.substring(0, 20) + '...' : value}</span>
+                </span>
+            {/each}
+        </span>
+    {/if}
+</div>
+
+<style>
+    .tool-call {
+        display: inline-flex;
+        align-items: center;
+        gap: 0.5rem;
+        background: rgba(65, 105, 225, 0.1);
+        border: 1px solid rgba(65, 105, 225, 0.3);
+        border-radius: 4px;
+        padding: 0.25rem 0.5rem;
+        margin: 0.25rem 0;
+        font-size: 0.8rem;
+        font-family: "Monaco", "Menlo", monospace;
+    }
+
+    .tool-icon {
+        font-size: 1rem;
+        line-height: 1;
+    }
+
+    .tool-name {
+        color: rgba(65, 105, 225, 1);
+        font-weight: 600;
+    }
+
+    .tool-params {
+        display: flex;
+        gap: 0.5rem;
+        color: rgba(255, 255, 255, 0.6);
+        font-size: 0.75rem;
+    }
+
+    .param {
+        display: flex;
+        gap: 0.25rem;
+    }
+
+    .param-key {
+        color: rgba(255, 255, 255, 0.5);
+    }
+
+    .param-value {
+        color: rgba(255, 210, 30, 0.7);
+    }
+</style>

src/lib/components/chat/context.md

@@ -1,14 +1,19 @@
 # Chat Context
 
-AI assistant interface with authentication-gated input
+AI chat interface with markdown rendering and tool visualization.
 
 ## Components
 
-- `ChatPanel.svelte` - Chat UI with auth-aware input controls
+- `ChatPanel.svelte` - Main chat UI with message display
+- `ReasoningBlock.svelte` - Collapsible AI thinking viewer
+- `MarkdownRenderer.svelte` - Markdown parser and renderer
+- `ToolCallDisplay.svelte` - Visual badges for tool calls
 
 ## Features
 
-- Authentication-required input (visible but disabled when not logged in)
-- Real-time message streaming when connected
-- Breathing input animation when ready
-- GSAP-animated button interactions
+- Real-time message streaming
+- Markdown formatting for assistant messages
+- Tool call visualization with icons
+- Collapsible thinking blocks (0.1s collapse)
+- Authentication integration
+- GSAP animations

src/lib/components/layout/SplitView.svelte

@@ -1,355 +1,427 @@
 <script lang="ts">
-  import { onMount } from 'svelte';
-  import { Splitpanes, Pane } from 'svelte-splitpanes';
-  import { uiStore } from '../../stores/ui';
-  import CodeEditor from '../editor/CodeEditor.svelte';
-  import GameCanvas from '../game/GameCanvas.svelte';
-  import ConsolePanel from '../console/ConsolePanel.svelte';
-  import ChatPanel from '../chat/ChatPanel.svelte';
-  import gsap from 'gsap';
-  
-  $: viewMode = $uiStore.viewMode;
-  
-  let userMainPaneSizes = { editor: 0.4, preview: 0.6 };
-  let userEditorPaneSizes = { code: 0.7, chat: 0.3 };
-  let userPreviewPaneSizes = { game: 0.75, console: 0.25 };
-  
-  onMount(() => {
-    gsap.fromTo(".editor-pane",
-      { opacity: 0, x: -20 },
-      { opacity: 1, x: 0, duration: 0.6, delay: 0.1, ease: "power3.out" }
-    );
-    
-    gsap.fromTo(".preview-pane",
-      { opacity: 0, x: 20 },
-      { opacity: 1, x: 0, duration: 0.6, delay: 0.2, ease: "power3.out" }
-    );
-    
-    const resetCursor = () => {
-      document.body.style.cursor = '';
-    };
-    document.addEventListener('mouseup', resetCursor);
-    
-    return () => {
-      document.removeEventListener('mouseup', resetCursor);
-    };
-  });
-  
-  $: if (viewMode) {
-    handleViewModeAnimation(viewMode);
-  }
-  
-  function handleViewModeAnimation(mode: 'code' | 'preview') {
-    const mainPanes = document.querySelector('.main-splitpanes')?.querySelectorAll(':scope > .splitpanes__pane');
-    if (!mainPanes || mainPanes.length < 2) return;
-    
-    const editorPaneEl = mainPanes[0] as HTMLElement;
-    const previewPaneEl = mainPanes[1] as HTMLElement;
-    const mainSplitter = document.querySelector('.main-splitpanes > .splitpanes__splitter') as HTMLElement;
-    
-    if (!editorPaneEl || !previewPaneEl) return;
-    
-    const editorSplitpanes = editorPaneEl.querySelectorAll('.splitpanes__pane');
-    const codePane = editorSplitpanes[0] as HTMLElement;
-    const chatPane = editorSplitpanes[1] as HTMLElement;
-    
-    const previewSplitpanes = previewPaneEl.querySelectorAll('.splitpanes__pane');
-    const gamePane = previewSplitpanes[0] as HTMLElement;
-    const consolePane = previewSplitpanes[1] as HTMLElement;
-    const consoleSplitter = previewPaneEl.querySelector('.splitpanes__splitter') as HTMLElement;
-    
-    if (mode === 'preview') {
-      const editorWidth = editorPaneEl.offsetWidth;
-      const previewWidth = previewPaneEl.offsetWidth;
-      const totalWidth = editorWidth + previewWidth;
-      
-      if (totalWidth > 0) {
-        userMainPaneSizes.editor = editorWidth / totalWidth;
-        userMainPaneSizes.preview = previewWidth / totalWidth;
-      }
-      
-      if (codePane && chatPane) {
-        const codeHeight = codePane.offsetHeight;
-        const chatHeight = chatPane.offsetHeight;
-        const totalEditorHeight = codeHeight + chatHeight;
-        
-        if (totalEditorHeight > 0) {
-          userEditorPaneSizes.code = codeHeight / totalEditorHeight;
-          userEditorPaneSizes.chat = chatHeight / totalEditorHeight;
+    import { onMount } from "svelte";
+    import { Splitpanes, Pane } from "svelte-splitpanes";
+    import { uiStore } from "../../stores/ui";
+    import CodeEditor from "../editor/CodeEditor.svelte";
+    import GameCanvas from "../game/GameCanvas.svelte";
+    import ConsolePanel from "../console/ConsolePanel.svelte";
+    import ChatPanel from "../chat/ChatPanel.svelte";
+    import gsap from "gsap";
+
+    $: viewMode = $uiStore.viewMode;
+
+    let userMainPaneSizes = { editor: 0.4, preview: 0.6 };
+    let userEditorPaneSizes = { code: 0.5, chat: 0.5 };
+    let userPreviewPaneSizes = { game: 0.75, console: 0.25 };
+
+    onMount(() => {
+        gsap.fromTo(
+            ".editor-pane",
+            { opacity: 0, x: -20 },
+            { opacity: 1, x: 0, duration: 0.6, delay: 0.1, ease: "power3.out" },
+        );
+
+        gsap.fromTo(
+            ".preview-pane",
+            { opacity: 0, x: 20 },
+            { opacity: 1, x: 0, duration: 0.6, delay: 0.2, ease: "power3.out" },
+        );
+
+        const resetCursor = () => {
+            document.body.style.cursor = "";
+        };
+        document.addEventListener("mouseup", resetCursor);
+
+        return () => {
+            document.removeEventListener("mouseup", resetCursor);
+        };
+    });
+
+    $: if (viewMode) {
+        handleViewModeAnimation(viewMode);
+    }
+
+    function handleViewModeAnimation(mode: "code" | "preview") {
+        const mainPanes = document
+            .querySelector(".main-splitpanes")
+            ?.querySelectorAll(":scope > .splitpanes__pane");
+        if (!mainPanes || mainPanes.length < 2) return;
+
+        const editorPaneEl = mainPanes[0] as HTMLElement;
+        const previewPaneEl = mainPanes[1] as HTMLElement;
+        const mainSplitter = document.querySelector(
+            ".main-splitpanes > .splitpanes__splitter",
+        ) as HTMLElement;
+
+        if (!editorPaneEl || !previewPaneEl) return;
+
+        const editorSplitpanes = editorPaneEl.querySelectorAll(".splitpanes__pane");
+        const codePane = editorSplitpanes[0] as HTMLElement;
+        const chatPane = editorSplitpanes[1] as HTMLElement;
+
+        const previewSplitpanes = previewPaneEl.querySelectorAll(".splitpanes__pane");
+        const gamePane = previewSplitpanes[0] as HTMLElement;
+        const consolePane = previewSplitpanes[1] as HTMLElement;
+        const consoleSplitter = previewPaneEl.querySelector(".splitpanes__splitter") as HTMLElement;
+
+        if (mode === "preview") {
+            const editorWidth = editorPaneEl.offsetWidth;
+            const previewWidth = previewPaneEl.offsetWidth;
+            const totalWidth = editorWidth + previewWidth;
+
+            if (totalWidth > 0) {
+                userMainPaneSizes.editor = editorWidth / totalWidth;
+                userMainPaneSizes.preview = previewWidth / totalWidth;
+            }
+
+            if (codePane && chatPane) {
+                const codeHeight = codePane.offsetHeight;
+                const chatHeight = chatPane.offsetHeight;
+                const totalEditorHeight = codeHeight + chatHeight;
+
+                if (totalEditorHeight > 0) {
+                    userEditorPaneSizes.code = codeHeight / totalEditorHeight;
+                    userEditorPaneSizes.chat = chatHeight / totalEditorHeight;
+                }
+            }
+
+            if (gamePane && consolePane) {
+                const gameHeight = gamePane.offsetHeight;
+                const consoleHeight = consolePane.offsetHeight;
+                const totalHeight = gameHeight + consoleHeight;
+
+                if (totalHeight > 0) {
+                    userPreviewPaneSizes.game = gameHeight / totalHeight;
+                    userPreviewPaneSizes.console = consoleHeight / totalHeight;
+                }
+            }
+
+            gsap.set(editorPaneEl, {
+                flexGrow: userMainPaneSizes.editor,
+                flexBasis: `${userMainPaneSizes.editor * 100}%`,
+            });
+            gsap.set(previewPaneEl, {
+                flexGrow: userMainPaneSizes.preview,
+                flexBasis: `${userMainPaneSizes.preview * 100}%`,
+            });
+
+            if (codePane && chatPane) {
+                gsap.set(codePane, {
+                    flexGrow: userEditorPaneSizes.code,
+                    flexBasis: `${userEditorPaneSizes.code * 100}%`,
+                });
+                gsap.set(chatPane, {
+                    flexGrow: userEditorPaneSizes.chat,
+                    flexBasis: `${userEditorPaneSizes.chat * 100}%`,
+                });
+            }
+
+            if (gamePane && consolePane) {
+                gsap.set(gamePane, {
+                    flexGrow: userPreviewPaneSizes.game,
+                    flexBasis: `${userPreviewPaneSizes.game * 100}%`,
+                });
+                gsap.set(consolePane, {
+                    flexGrow: userPreviewPaneSizes.console,
+                    flexBasis: `${userPreviewPaneSizes.console * 100}%`,
+                });
+            }
         }
-      }
-      
-      if (gamePane && consolePane) {
-        const gameHeight = gamePane.offsetHeight;
-        const consoleHeight = consolePane.offsetHeight;
-        const totalHeight = gameHeight + consoleHeight;
-        
-        if (totalHeight > 0) {
-          userPreviewPaneSizes.game = gameHeight / totalHeight;
-          userPreviewPaneSizes.console = consoleHeight / totalHeight;
+
+        if (mode === "preview") {
+            gsap.timeline({ ease: "power2.out" })
+                .to(editorPaneEl, {
+                    opacity: 0,
+                    duration: 0.15,
+                })
+                .to(
+                    consolePane,
+                    {
+                        opacity: 0,
+                        duration: 0.15,
+                    },
+                    "-=0.15",
+                )
+                .to(
+                    editorPaneEl,
+                    {
+                        flexGrow: 0,
+                        flexBasis: "0%",
+                        duration: 0.2,
+                        ease: "power2.inOut",
+                        onComplete: () => {
+                            editorPaneEl.style.display = "none";
+                            if (mainSplitter) mainSplitter.style.display = "none";
+                        },
+                    },
+                    "-=0.1",
+                )
+                .to(
+                    consolePane,
+                    {
+                        flexGrow: 0,
+                        flexBasis: "0%",
+                        duration: 0.2,
+                        ease: "power2.inOut",
+                        onComplete: () => {
+                            consolePane.style.display = "none";
+                            if (consoleSplitter) consoleSplitter.style.display = "none";
+                        },
+                    },
+                    "-=0.2",
+                )
+                .to(
+                    gamePane,
+                    {
+                        flexGrow: 1,
+                        flexBasis: "100%",
+                        duration: 0.2,
+                        ease: "power2.inOut",
+                    },
+                    "-=0.2",
+                )
+                .to(
+                    previewPaneEl,
+                    {
+                        flexGrow: 1,
+                        flexBasis: "100%",
+                        duration: 0.2,
+                        ease: "power2.inOut",
+                    },
+                    "-=0.2",
+                );
+        } else {
+            editorPaneEl.style.display = "";
+            if (mainSplitter) mainSplitter.style.display = "";
+            consolePane.style.display = "";
+            if (consoleSplitter) consoleSplitter.style.display = "";
+
+            gsap.timeline({ ease: "power2.out" })
+                .set(editorPaneEl, {
+                    opacity: 0,
+                    flexGrow: 0,
+                    flexBasis: "0%",
+                })
+                .set(consolePane, {
+                    opacity: 0,
+                    flexGrow: 0,
+                    flexBasis: "0%",
+                })
+                .to([editorPaneEl, previewPaneEl], {
+                    flexGrow: (i) =>
+                        i === 0 ? userMainPaneSizes.editor : userMainPaneSizes.preview,
+                    flexBasis: (i) =>
+                        i === 0
+                            ? `${userMainPaneSizes.editor * 100}%`
+                            : `${userMainPaneSizes.preview * 100}%`,
+                    duration: 0.2,
+                    ease: "power2.inOut",
+                })
+                .to(
+                    [codePane, chatPane],
+                    {
+                        flexGrow: (i) =>
+                            i === 0 ? userEditorPaneSizes.code : userEditorPaneSizes.chat,
+                        flexBasis: (i) =>
+                            i === 0
+                                ? `${userEditorPaneSizes.code * 100}%`
+                                : `${userEditorPaneSizes.chat * 100}%`,
+                        duration: 0.2,
+                        ease: "power2.inOut",
+                    },
+                    "-=0.2",
+                )
+                .to(
+                    [gamePane, consolePane],
+                    {
+                        flexGrow: (i) =>
+                            i === 0 ? userPreviewPaneSizes.game : userPreviewPaneSizes.console,
+                        flexBasis: (i) =>
+                            i === 0
+                                ? `${userPreviewPaneSizes.game * 100}%`
+                                : `${userPreviewPaneSizes.console * 100}%`,
+                        duration: 0.2,
+                        ease: "power2.inOut",
+                    },
+                    "-=0.2",
+                )
+                .to(
+                    consolePane,
+                    {
+                        opacity: 1,
+                        duration: 0.15,
+                    },
+                    "-=0.15",
+                )
+                .to(
+                    editorPaneEl,
+                    {
+                        opacity: 1,
+                        duration: 0.15,
+                        onComplete: () => {
+                            window.dispatchEvent(new Event("resize"));
+                        },
+                    },
+                    "-=0.15",
+                );
         }
-      }
-      
-      gsap.set(editorPaneEl, { flexGrow: userMainPaneSizes.editor, flexBasis: `${userMainPaneSizes.editor * 100}%` });
-      gsap.set(previewPaneEl, { flexGrow: userMainPaneSizes.preview, flexBasis: `${userMainPaneSizes.preview * 100}%` });
-      
-      if (codePane && chatPane) {
-        gsap.set(codePane, { flexGrow: userEditorPaneSizes.code, flexBasis: `${userEditorPaneSizes.code * 100}%` });
-        gsap.set(chatPane, { flexGrow: userEditorPaneSizes.chat, flexBasis: `${userEditorPaneSizes.chat * 100}%` });
-      }
-      
-      if (gamePane && consolePane) {
-        gsap.set(gamePane, { flexGrow: userPreviewPaneSizes.game, flexBasis: `${userPreviewPaneSizes.game * 100}%` });
-        gsap.set(consolePane, { flexGrow: userPreviewPaneSizes.console, flexBasis: `${userPreviewPaneSizes.console * 100}%` });
-      }
     }
-    
-    if (mode === 'preview') {
-      gsap.timeline({ ease: "power2.out" })
-        .to(editorPaneEl, {
-          opacity: 0,
-          duration: 0.15,
-        })
-        .to(consolePane, {
-          opacity: 0,
-          duration: 0.15,
-        }, "-=0.15")
-        .to(editorPaneEl, {
-          flexGrow: 0,
-          flexBasis: "0%",
-          duration: 0.2,
-          ease: "power2.inOut",
-          onComplete: () => {
-            editorPaneEl.style.display = 'none';
-            if (mainSplitter) mainSplitter.style.display = 'none';
-          }
-        }, "-=0.1")
-        .to(consolePane, {
-          flexGrow: 0,
-          flexBasis: "0%",
-          duration: 0.2,
-          ease: "power2.inOut",
-          onComplete: () => {
-            consolePane.style.display = 'none';
-            if (consoleSplitter) consoleSplitter.style.display = 'none';
-          }
-        }, "-=0.2")
-        .to(gamePane, {
-          flexGrow: 1,
-          flexBasis: "100%",
-          duration: 0.2,
-          ease: "power2.inOut",
-        }, "-=0.2")
-        .to(previewPaneEl, {
-          flexGrow: 1,
-          flexBasis: "100%",
-          duration: 0.2,
-          ease: "power2.inOut",
-        }, "-=0.2");
-    } else {
-      editorPaneEl.style.display = '';
-      if (mainSplitter) mainSplitter.style.display = '';
-      consolePane.style.display = '';
-      if (consoleSplitter) consoleSplitter.style.display = '';
-      
-      gsap.timeline({ ease: "power2.out" })
-        .set(editorPaneEl, {
-          opacity: 0,
-          flexGrow: 0,
-          flexBasis: "0%"
-        })
-        .set(consolePane, {
-          opacity: 0,
-          flexGrow: 0,
-          flexBasis: "0%"
-        })
-        .to([editorPaneEl, previewPaneEl], {
-          flexGrow: (i) => i === 0 ? userMainPaneSizes.editor : userMainPaneSizes.preview,
-          flexBasis: (i) => i === 0 ? `${userMainPaneSizes.editor * 100}%` : `${userMainPaneSizes.preview * 100}%`,
-          duration: 0.2,
-          ease: "power2.inOut",
-        })
-        .to([codePane, chatPane], {
-          flexGrow: (i) => i === 0 ? userEditorPaneSizes.code : userEditorPaneSizes.chat,
-          flexBasis: (i) => i === 0 ? `${userEditorPaneSizes.code * 100}%` : `${userEditorPaneSizes.chat * 100}%`,
-          duration: 0.2,
-          ease: "power2.inOut",
-        }, "-=0.2")
-        .to([gamePane, consolePane], {
-          flexGrow: (i) => i === 0 ? userPreviewPaneSizes.game : userPreviewPaneSizes.console,
-          flexBasis: (i) => i === 0 ? `${userPreviewPaneSizes.game * 100}%` : `${userPreviewPaneSizes.console * 100}%`,
-          duration: 0.2,
-          ease: "power2.inOut",
-        }, "-=0.2")
-        .to(consolePane, {
-          opacity: 1,
-          duration: 0.15,
-        }, "-=0.15")
-        .to(editorPaneEl, {
-          opacity: 1,
-          duration: 0.15,
-          onComplete: () => {
-            window.dispatchEvent(new Event('resize'));
-          }
-        }, "-=0.15");
-    }
-  }
 </script>
 
 <div class="editor-layout">
-  <Splitpanes class="main-splitpanes" theme="modern-theme">
-    <Pane minSize={20} size={40} class="editor-pane">
-      <div class="editor-panel">
-        <Splitpanes horizontal class="editor-splitpanes" theme="modern-theme">
-          <Pane minSize={30} size={70} class="code-pane">
-            <CodeEditor />
-          </Pane>
-          <Pane minSize={15} size={30} class="chat-pane">
-            <ChatPanel />
-          </Pane>
-        </Splitpanes>
-      </div>
-    </Pane>
-    <Pane minSize={25} size={60} class="preview-pane">
-      <div class="preview-panel">
-        <Splitpanes horizontal class="preview-splitpanes" theme="modern-theme">
-          <Pane minSize={30} class="game-pane">
-            <GameCanvas />
-          </Pane>
-          <Pane minSize={15} size={25} class="console-pane">
-            <ConsolePanel />
-          </Pane>
-        </Splitpanes>
-      </div>
-    </Pane>
-  </Splitpanes>
+    <Splitpanes class="main-splitpanes" theme="modern-theme">
+        <Pane minSize={20} size={40} class="editor-pane">
+            <div class="editor-panel">
+                <Splitpanes horizontal class="editor-splitpanes" theme="modern-theme">
+                    <Pane minSize={30} size={userEditorPaneSizes.code * 100} class="code-pane">
+                        <CodeEditor />
+                    </Pane>
+                    <Pane minSize={15} size={userEditorPaneSizes.chat * 100} class="chat-pane">
+                        <ChatPanel />
+                    </Pane>
+                </Splitpanes>
+            </div>
+        </Pane>
+        <Pane minSize={25} size={60} class="preview-pane">
+            <div class="preview-panel">
+                <Splitpanes horizontal class="preview-splitpanes" theme="modern-theme">
+                    <Pane minSize={30} class="game-pane">
+                        <GameCanvas />
+                    </Pane>
+                    <Pane minSize={15} size={25} class="console-pane">
+                        <ConsolePanel />
+                    </Pane>
+                </Splitpanes>
+            </div>
+        </Pane>
+    </Splitpanes>
 </div>
 
 <style>
-  .editor-layout {
-    flex: 1;
-    display: flex;
-    min-height: 0;
-    background: rgba(139, 115, 85, 0.02);
-  }
-
-  :global(.main-splitpanes) {
-    width: 100%;
-    height: 100%;
-  }
-
-  :global(.editor-splitpanes) {
-    width: 100%;
-    height: 100%;
-  }
-
-  :global(.preview-splitpanes) {
-    width: 100%;
-    height: 100%;
-  }
-
-  :global(.editor-pane) {
-    display: flex;
-    overflow: hidden;
-  }
-
-  :global(.preview-pane) {
-    display: flex;
-    overflow: hidden;
-  }
-
-  :global(.code-pane) {
-    display: flex;
-    overflow: hidden;
-  }
-
-  :global(.game-pane) {
-    display: flex;
-    overflow: hidden;
-  }
-
-  :global(.console-pane) {
-    display: flex;
-    overflow: hidden;
-  }
-  
-  :global(.chat-pane) {
-    display: flex;
-    overflow: hidden;
-  }
-
-  .editor-panel {
-    width: 100%;
-    height: 100%;
-    display: flex;
-    flex-direction: column;
-    background: rgba(11, 10, 9, 0.3);
-    min-width: 0;
-    overflow: hidden;
-  }
-
-  .preview-panel {
-    width: 100%;
-    height: 100%;
-    display: flex;
-    flex-direction: column;
-    background: rgba(11, 10, 9, 0.3);
-    min-width: 0;
-    overflow: hidden;
-  }
-
-  :global(.splitpanes.modern-theme .splitpanes__splitter) {
-    background: rgba(139, 115, 85, 0.06);
-    position: relative;
-    transition: background 0.2s;
-  }
-
-  :global(.splitpanes.modern-theme .splitpanes__splitter:hover) {
-    background: rgba(139, 115, 85, 0.12);
-  }
-
-  :global(.splitpanes.modern-theme .splitpanes__splitter:before) {
-    content: '';
-    position: absolute;
-    z-index: 1;
-    transition: opacity 0.2s;
-    background: rgba(124, 152, 133, 0.1);
-    opacity: 0;
-  }
-
-  :global(.splitpanes.modern-theme .splitpanes__splitter:hover:before) {
-    opacity: 1;
-  }
-
-  :global(.splitpanes--vertical.modern-theme > .splitpanes__splitter) {
-    width: 1px;
-    cursor: col-resize;
-  }
-
-  :global(.splitpanes--vertical.modern-theme > .splitpanes__splitter:before) {
-    left: -3px;
-    right: -3px;
-    height: 100%;
-    cursor: col-resize;
-  }
-
-  :global(.splitpanes--horizontal.modern-theme > .splitpanes__splitter) {
-    height: 1px;
-    cursor: row-resize;
-  }
-
-  :global(.splitpanes--horizontal.modern-theme > .splitpanes__splitter:before) {
-    top: -3px;
-    bottom: -3px;
-    width: 100%;
-    cursor: row-resize;
-  }
-
-  :global(body.splitpanes--dragging) {
-    cursor: inherit;
-  }
-  
-  :global(body:not(.splitpanes--dragging) .splitpanes__splitter:not(:hover)) {
-    cursor: default;
-  }
+    .editor-layout {
+        flex: 1;
+        display: flex;
+        min-height: 0;
+        background: rgba(139, 115, 85, 0.02);
+    }
+
+    :global(.main-splitpanes) {
+        width: 100%;
+        height: 100%;
+    }
+
+    :global(.editor-splitpanes) {
+        width: 100%;
+        height: 100%;
+    }
+
+    :global(.preview-splitpanes) {
+        width: 100%;
+        height: 100%;
+    }
+
+    :global(.editor-pane) {
+        display: flex;
+        overflow: hidden;
+    }
+
+    :global(.preview-pane) {
+        display: flex;
+        overflow: hidden;
+    }
+
+    :global(.code-pane) {
+        display: flex;
+        overflow: hidden;
+    }
+
+    :global(.game-pane) {
+        display: flex;
+        overflow: hidden;
+    }
+
+    :global(.console-pane) {
+        display: flex;
+        overflow: hidden;
+    }
+
+    :global(.chat-pane) {
+        display: flex;
+        overflow: hidden;
+    }
+
+    .editor-panel {
+        width: 100%;
+        height: 100%;
+        display: flex;
+        flex-direction: column;
+        background: rgba(11, 10, 9, 0.3);
+        min-width: 0;
+        overflow: hidden;
+    }
+
+    .preview-panel {
+        width: 100%;
+        height: 100%;
+        display: flex;
+        flex-direction: column;
+        background: rgba(11, 10, 9, 0.3);
+        min-width: 0;
+        overflow: hidden;
+    }
+
+    :global(.splitpanes.modern-theme .splitpanes__splitter) {
+        background: rgba(139, 115, 85, 0.06);
+        position: relative;
+        transition: background 0.2s;
+    }
+
+    :global(.splitpanes.modern-theme .splitpanes__splitter:hover) {
+        background: rgba(139, 115, 85, 0.12);
+    }
+
+    :global(.splitpanes.modern-theme .splitpanes__splitter:before) {
+        content: "";
+        position: absolute;
+        z-index: 1;
+        transition: opacity 0.2s;
+        background: rgba(124, 152, 133, 0.1);
+        opacity: 0;
+    }
+
+    :global(.splitpanes.modern-theme .splitpanes__splitter:hover:before) {
+        opacity: 1;
+    }
+
+    :global(.splitpanes--vertical.modern-theme > .splitpanes__splitter) {
+        width: 1px;
+        cursor: col-resize;
+    }
+
+    :global(.splitpanes--vertical.modern-theme > .splitpanes__splitter:before) {
+        left: -3px;
+        right: -3px;
+        height: 100%;
+        cursor: col-resize;
+    }
+
+    :global(.splitpanes--horizontal.modern-theme > .splitpanes__splitter) {
+        height: 1px;
+        cursor: row-resize;
+    }
+
+    :global(.splitpanes--horizontal.modern-theme > .splitpanes__splitter:before) {
+        top: -3px;
+        bottom: -3px;
+        width: 100%;
+        cursor: row-resize;
+    }
+
+    :global(body.splitpanes--dragging) {
+        cursor: inherit;
+    }
+
+    :global(body:not(.splitpanes--dragging) .splitpanes__splitter:not(:hover)) {
+        cursor: default;
+    }
 </style>

src/lib/server/agent-config.ts

@@ -0,0 +1,19 @@
+export interface AgentConfig {
+  model?: string;
+  maxIterations?: number;
+  temperature?: number;
+  maxTokens?: number;
+}
+
+export const DEFAULT_CONFIG: Required<AgentConfig> = {
+  model: "Qwen/Qwen3-Next-80B-A3B-Instruct",
+  maxIterations: 10,
+  temperature: 0.5,
+  maxTokens: 1200,
+};
+
+export const mergeConfig = (
+  config: AgentConfig = {},
+): Required<AgentConfig> => {
+  return { ...DEFAULT_CONFIG, ...config };
+};

src/lib/server/agent-runner.test.ts

@@ -0,0 +1,100 @@
+import { describe, expect, test, beforeAll } from "bun:test";
+import { AgentRunner } from "./agent-runner";
+import "../tools"; // Import to register tools
+
+describe("AgentRunner Tool Execution", () => {
+  beforeAll(() => {
+    // Create runner instance for test context
+    new AgentRunner({
+      model: "test-model",
+      temperature: 0.7,
+      maxTokens: 1000,
+    });
+  });
+
+  describe("Tool Detection", () => {
+    test("should detect tool calls in response", async () => {
+      const { parseToolCalls } = await import("../tools");
+
+      // Test various agent responses
+      const responses = [
+        {
+          text: "I'll read the game code for you.\n\n[TOOL: read_game_code]\n\nAnalyzing...",
+          expected: ["read_game_code"],
+        },
+        {
+          text: "Let me check that. [TOOL: read_game_code] Now I can see the code.",
+          expected: ["read_game_code"],
+        },
+        {
+          text: "No tools needed for this response.",
+          expected: [],
+        },
+      ];
+
+      for (const { text, expected } of responses) {
+        const calls = parseToolCalls(text);
+        expect(calls.map((c) => c.tool)).toEqual(expected);
+      }
+    });
+
+    test("should format tool results correctly", async () => {
+      const { formatToolResult } = await import("../tools");
+
+      const successResult = {
+        success: true,
+        data: { content: "<world>test</world>", language: "html" },
+      };
+
+      const formatted = formatToolResult("read_game_code", successResult);
+      expect(formatted).toContain("[TOOL_RESULT: read_game_code]");
+      expect(formatted).toContain("<world>test</world>");
+      expect(formatted).toContain("[/TOOL_RESULT]");
+    });
+  });
+
+  describe("System Prompt", () => {
+    test("should include tool instructions", async () => {
+      const { toolRegistry } = await import("../tools");
+      const descriptions = toolRegistry.getToolDescriptions();
+
+      // System prompt should mention the tool
+      expect(descriptions).toContain("read_game_code");
+      expect(descriptions).toContain(
+        "Get the current game code from the editor",
+      );
+    });
+  });
+});
+
+// Integration test that would require mocking HuggingFace API
+describe("Full Tool Flow (Mock)", () => {
+  test("should execute tool when detected in response", async () => {
+    // This test demonstrates the expected flow
+    // In production, this would make actual API calls
+
+    const mockResponse = "I'll check the game code.\n\n[TOOL: read_game_code]";
+    const { parseToolCalls, toolRegistry } = await import("../tools");
+
+    // 1. Parse tool calls from response
+    const calls = parseToolCalls(mockResponse);
+    expect(calls).toHaveLength(1);
+    expect(calls[0].tool).toBe("read_game_code");
+
+    // 2. Execute the tool
+    const result = await toolRegistry.execute(
+      calls[0].tool,
+      calls[0].parameters,
+    );
+    expect(result.success).toBe(true);
+    expect(result.data).toBeDefined();
+
+    // 3. Format result for context
+    const { formatToolResult } = await import("../tools");
+    const formatted = formatToolResult(calls[0].tool, result);
+    expect(formatted).toContain("[TOOL_RESULT:");
+
+    // 4. In the real flow, this formatted result would be added to message history
+    // and a follow-up API call would be made to process it
+  });
+});

src/lib/server/agent-runner.ts

@@ -1,32 +1,30 @@
 import { HfInference } from "@huggingface/inference";
+import { toolRegistry, toolExecutor } from "../tools";
+import { documentationService } from "./documentation";
+import {
+  buildSystemPrompt,
+  buildToolFollowUpPrompt,
+  formatDocumentation,
+} from "./prompts";
+import { mergeConfig, type AgentConfig } from "./agent-config";
+import { UniversalReasoningExtractor } from "./reasoning-extractor";
 
 export interface AgentMessage {
   id: string;
   role: "user" | "assistant" | "system";
   content: string;
   timestamp: number;
-}
-
-export interface AgentConfig {
-  model?: string;
-  maxIterations?: number;
-  temperature?: number;
-  maxTokens?: number;
+  reasoning?: string;
 }
 
 export class AgentRunner {
   private client: HfInference | null = null;
-  private config: AgentConfig;
+  private config: Required<AgentConfig>;
   private messageHistory: AgentMessage[] = [];
+  private reasoningExtractor = new UniversalReasoningExtractor();
 
   constructor(config: AgentConfig = {}) {
-    this.config = {
-      model: "deepseek-ai/DeepSeek-R1-Distill-Qwen-1.5B",
-      maxIterations: 10,
-      temperature: 0.7,
-      maxTokens: 1000,
-      ...config,
-    };
+    this.config = mergeConfig(config);
   }
 
   async initialize(hfToken?: string) {
@@ -35,94 +33,144 @@ export class AgentRunner {
         "Hugging Face authentication required. Please sign in to continue.",
       );
     }
-
     this.client = new HfInference(hfToken);
   }
 
   async processMessage(
     message: string,
-    onStream?: (chunk: string) => void,
+    onStream?: (chunk: string, reasoning?: string) => void,
   ): Promise<string> {
     if (!this.client) {
       throw new Error("AgentRunner not initialized. Call initialize() first.");
     }
 
-    const userMessage: AgentMessage = {
-      id: this.generateId(),
-      role: "user",
-      content: message,
-      timestamp: Date.now(),
-    };
-
-    this.messageHistory.push(userMessage);
-
-    try {
-      const systemPrompt = `You are an AI assistant helping to build games with VibeGame.
-You can read and modify game code using XML syntax.
-Always validate changes and ensure the game remains playable.
-Use small, incremental changes rather than large rewrites.`;
-
-      const messages = [
-        { role: "system", content: systemPrompt },
-        ...this.messageHistory.map((msg) => ({
-          role: msg.role,
-          content: msg.content,
-        })),
-      ];
-
-      let fullResponse = "";
-
-      const stream = await this.client.chatCompletionStream({
-        model: this.config.model!,
-        messages: messages as Array<{ role: string; content: string }>,
-        temperature: this.config.temperature,
-        max_tokens: this.config.maxTokens,
-      });
+    this.addUserMessage(message);
 
-      for await (const chunk of stream) {
-        if (chunk.choices && chunk.choices.length > 0) {
-          const delta = chunk.choices[0].delta?.content;
-          if (delta) {
-            fullResponse += delta;
-            if (onStream) {
-              onStream(delta);
-            }
-          }
-        }
-      }
-
-      const assistantMessage: AgentMessage = {
-        id: this.generateId(),
-        role: "assistant",
-        content: fullResponse,
-        timestamp: Date.now(),
-      };
+    const documentation = await this.loadDocumentation();
+    const systemPrompt = this.buildPrompt(documentation);
 
-      this.messageHistory.push(assistantMessage);
+    this.reasoningExtractor.reset();
+    const response = await this.streamCompletion(systemPrompt, onStream);
 
-      return fullResponse;
-    } catch (error) {
-      console.error("Error processing message:", error);
+    const extracted = this.reasoningExtractor.extract(response);
+    this.addAssistantMessage(extracted.content, extracted.reasoning);
 
-      if (error instanceof Error && error.message.includes("rate limit")) {
-        throw new Error(
-          "Hugging Face API rate limit exceeded. Please provide an API token or wait before retrying.",
-        );
-      }
+    const toolResults = await this.executeToolsIfNeeded(extracted.content);
 
-      throw error;
+    if (toolResults.length > 0) {
+      this.addToolResults(toolResults);
+      return await this.handleToolFollowUp(documentation, onStream);
     }
+
+    return extracted.content;
+  }
+
+  clearHistory() {
+    this.messageHistory = [];
   }
 
   getHistory(): AgentMessage[] {
     return [...this.messageHistory];
   }
 
-  clearHistory() {
-    this.messageHistory = [];
+  private async loadDocumentation(): Promise<string> {
+    const fullDocs = await documentationService.load();
+    return formatDocumentation(fullDocs || "");
+  }
+
+  private buildPrompt(documentation: string): string {
+    const tools = toolRegistry.getToolDescriptions();
+    return buildSystemPrompt(tools, documentation);
+  }
+
+  private async streamCompletion(
+    systemPrompt: string,
+    onStream?: (chunk: string, reasoning?: string) => void,
+  ): Promise<string> {
+    const messages = this.buildMessages(systemPrompt);
+
+    const stream = await this.client!.chatCompletionStream({
+      model: this.config.model,
+      messages: messages as Array<{ role: string; content: string }>,
+      temperature: this.config.temperature,
+      max_tokens: this.config.maxTokens,
+    });
+
+    let fullResponse = "";
+    for await (const chunk of stream) {
+      const delta = chunk.choices?.[0]?.delta?.content;
+      if (delta) {
+        fullResponse += delta;
+
+        const result = this.reasoningExtractor.stream(delta);
+        if (result.partial) {
+          onStream?.(result.partial, result.reasoning);
+        } else if (result.reasoning) {
+          onStream?.("", result.reasoning);
+        }
+      }
+    }
+
+    return fullResponse;
+  }
+
+  private buildMessages(systemPrompt: string) {
+    return [
+      { role: "system", content: systemPrompt },
+      ...this.messageHistory.map((msg) => ({
+        role: msg.role,
+        content: msg.content,
+      })),
+    ];
+  }
+
+  private async executeToolsIfNeeded(response: string) {
+    return toolExecutor.executeFromResponse(response);
+  }
+
+  private addToolResults(results: { formatted: string }[]) {
+    for (const result of results) {
+      this.messageHistory.push({
+        id: this.generateId(),
+        role: "system",
+        content: result.formatted,
+        timestamp: Date.now(),
+      });
+    }
+  }
+
+  private async handleToolFollowUp(
+    documentation: string,
+    onStream?: (chunk: string, reasoning?: string) => void,
+  ): Promise<string> {
+    const followUpPrompt = buildToolFollowUpPrompt(documentation);
+    this.reasoningExtractor.reset();
+    const response = await this.streamCompletion(followUpPrompt, onStream);
+    const extracted = this.reasoningExtractor.extract(response);
+    this.addAssistantMessage(extracted.content, extracted.reasoning);
+    return extracted.content;
+  }
+
+  private addUserMessage(content: string) {
+    this.messageHistory.push({
+      id: this.generateId(),
+      role: "user",
+      content,
+      timestamp: Date.now(),
+    });
+  }
+
+  private addAssistantMessage(content: string, reasoning?: string) {
+    this.messageHistory.push({
+      id: this.generateId(),
+      role: "assistant",
+      content,
+      timestamp: Date.now(),
+      reasoning,
+    });
   }
 
   private generateId(): string {
-    return `msg_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+    return `msg-${Date.now()}-${Math.random().toString(36).substring(2, 11)}`;
   }
 }

src/lib/server/api.ts

@@ -8,6 +8,7 @@ export interface WebSocketMessage {
     content?: string;
     role?: string;
     chunk?: string;
+    reasoning?: string;
     error?: string;
     processing?: boolean;
     connected?: boolean;
@@ -102,10 +103,10 @@ class WebSocketManager {
 
           const response = await connectionData.agent.processMessage(
             userMessage,
-            (chunk: string) => {
+            (chunk: string, reasoning?: string) => {
               this.sendMessage(ws, {
                 type: "stream",
-                payload: { chunk },
+                payload: { chunk, reasoning },
                 timestamp: Date.now(),
               });
             },
@@ -162,4 +163,7 @@ class WebSocketManager {
 
 export const wsManager = new WebSocketManager();
 
-export async function initializeAgent() {}
+export async function initializeAgent() {
+  // Initialize tools when server starts
+  await import("../tools");
+}

src/lib/server/context.md

@@ -1,20 +1,25 @@
 # Server Context
 
-WebSocket server for AI agent communication.
+WebSocket server and AI agent orchestration with reasoning extraction.
 
 ## Components
 
-- `agent-runner.ts` - HuggingFace inference client with streaming support
-- `api.ts` - WebSocket manager with per-connection agent instances
+- `api.ts` - WebSocket connection management
+- `agent-runner.ts` - Message flow orchestration with reasoning filtering
+- `agent-config.ts` - Configuration constants
+- `prompts.ts` - Prompt templates
+- `documentation.ts` - Docs loading service
+- `reasoning-extractor.ts` - Filters thinking tags from model output
 
 ## Architecture
 
-Vite plugin providing:
+Clean separation of concerns:
 
-- WebSocket endpoint at `/ws`
-- Per-connection authentication via HuggingFace tokens
-- Message streaming for chat responses
+- Agent runner orchestrates message flow and filters reasoning
+- Reasoning extractor handles streaming tag extraction
+- Tools execute via registry pattern
+- Prompts and config externalized
 
 ## Integration
 
-Frontend connection via `src/lib/stores/agent.ts` store.
+Frontend via `src/lib/stores/agent.ts` store with reasoning support.

src/lib/server/documentation.ts

@@ -0,0 +1,30 @@
+import { readFile } from "fs/promises";
+import { join } from "path";
+
+export class DocumentationService {
+  private cache: string | null = null;
+  private readonly docsPath: string;
+
+  constructor(filename: string = "llms.txt") {
+    this.docsPath = join(process.cwd(), filename);
+  }
+
+  async load(): Promise<string | null> {
+    if (this.cache !== null) {
+      return this.cache;
+    }
+
+    try {
+      this.cache = await readFile(this.docsPath, "utf-8");
+      return this.cache;
+    } catch {
+      return null;
+    }
+  }
+
+  clearCache(): void {
+    this.cache = null;
+  }
+}
+
+export const documentationService = new DocumentationService();

src/lib/server/hint.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, test } from "bun:test";
+
+describe("Message Enhancement for Tool Usage", () => {
+  test("should detect requests to read game code", () => {
+    const testCases = [
+      { input: "read the game code", shouldTrigger: true },
+      { input: "show me the game", shouldTrigger: true },
+      { input: "what's in the game?", shouldTrigger: true },
+      { input: "check the code", shouldTrigger: true },
+      { input: "view the editor", shouldTrigger: true },
+      { input: "see the scene", shouldTrigger: true },
+      { input: "display the game code", shouldTrigger: true },
+      { input: "look at the code", shouldTrigger: true },
+      { input: "get the game", shouldTrigger: true },
+      { input: "game code please", shouldTrigger: true },
+      { input: "hello there", shouldTrigger: false },
+      { input: "add a box", shouldTrigger: false },
+      { input: "change the color", shouldTrigger: false },
+    ];
+
+    const pattern =
+      /\b(read|show|view|check|see|what's in|what is in|get|display|look at)\b.*\b(game|code|editor|scene)\b/i;
+    const reversePattern =
+      /\b(game|code|editor|scene)\b.*\b(read|show|view|check|see|please)\b/i;
+
+    for (const { input, shouldTrigger } of testCases) {
+      const matches = pattern.test(input) || reversePattern.test(input);
+      expect(matches).toBe(shouldTrigger);
+    }
+  });
+});

src/lib/server/prompts.ts

@@ -0,0 +1,50 @@
+export const SYSTEM_PROMPTS = {
+  main: (
+    tools: string,
+    documentation: string,
+  ) => `You are an expert VibeGame developer assistant. VibeGame is a declarative 3D game engine using XML-like syntax, similar to Roblox but with "vibe coding" - focusing on quick, creative game development.
+
+ENGINE CONTEXT:
+VibeGame is a custom engine not in your training data. It uses declarative XML syntax for scene definition with Entity-Component-System (ECS) architecture.
+
+${documentation}
+
+AVAILABLE TOOLS:
+${tools}
+
+TOOL USAGE:
+- Execute tools with: [TOOL: tool_name] or [TOOL: tool_name {"param": "value"}]
+- read_game_code: Get current editor content
+- write_game_code: Update the editor with new code
+- read_console_output: Check console for errors, logs, and game output
+
+WORKFLOW:
+1. Read the current code to understand the game
+2. Make changes using write_game_code
+3. Check console output for errors or success
+4. Iterate based on feedback
+
+Be helpful, accurate, and adapt to what the user needs. Focus on working code and practical solutions.`,
+
+  toolFollowUp: (
+    documentation: string,
+  ) => `Based on the tool execution result, provide relevant analysis of what you found.
+
+${documentation}`,
+};
+
+export const formatDocumentation = (fullDocs: string): string => {
+  return `VIBEGAME REFERENCE:
+${fullDocs}`;
+};
+
+export const buildSystemPrompt = (
+  tools: string,
+  documentation: string,
+): string => {
+  return SYSTEM_PROMPTS.main(tools, documentation);
+};
+
+export const buildToolFollowUpPrompt = (documentation: string): string => {
+  return SYSTEM_PROMPTS.toolFollowUp(documentation);
+};

src/lib/server/reasoning-extractor.test.ts

@@ -0,0 +1,114 @@
+import { describe, test, expect } from "bun:test";
+import { UniversalReasoningExtractor } from "./reasoning-extractor";
+
+describe("UniversalReasoningExtractor", () => {
+  test("extracts Qwen thinking tags", () => {
+    const extractor = new UniversalReasoningExtractor();
+    const input = `<thinking>
+Let me analyze this step by step:
+1. First, I need to understand the problem
+2. Then I'll formulate a solution
+3. Finally, I'll provide the answer
+</thinking>
+
+The answer to your question is 42.`;
+
+    const result = extractor.extract(input);
+    expect(result.content).toBe("The answer to your question is 42.");
+    expect(result.reasoning).toContain("Let me analyze this step by step");
+  });
+
+  test("extracts DeepSeek R1 think tags", () => {
+    const extractor = new UniversalReasoningExtractor();
+    const input = `<think>
+Hmm, this is an interesting problem.
+I should consider multiple approaches.
+</think>
+
+Here's the solution to your problem.`;
+
+    const result = extractor.extract(input);
+    expect(result.content).toBe("Here's the solution to your problem.");
+    expect(result.reasoning).toContain("interesting problem");
+  });
+
+  test("handles interleaved reasoning tags", () => {
+    const extractor = new UniversalReasoningExtractor();
+    const input = `<thinking>
+First reasoning block
+</thinking>
+Some content here.
+<reasoning>
+Second reasoning block
+</reasoning>
+Final answer.`;
+
+    const result = extractor.extract(input);
+    expect(result.content).toBe("Some content here.\n\nFinal answer.");
+    expect(result.reasoning).toContain("First reasoning block");
+    expect(result.reasoning).toContain("Second reasoning block");
+  });
+
+  test("streams content correctly", () => {
+    const extractor = new UniversalReasoningExtractor();
+
+    const chunks = [
+      "Hello, ",
+      "<think",
+      "ing>",
+      "This is my ",
+      "reasoning process",
+      "</thinking>",
+      " Here is the answer.",
+    ];
+
+    let finalContent = "";
+    let finalReasoning = "";
+
+    for (const chunk of chunks) {
+      const result = extractor.stream(chunk);
+      if (result.partial) {
+        finalContent += result.partial;
+      }
+      if (result.reasoning) {
+        finalReasoning = result.reasoning;
+      }
+    }
+
+    expect(finalContent).toBe("Hello,  Here is the answer.");
+    expect(finalReasoning).toBe("This is my reasoning process");
+  });
+
+  test("handles multiple reasoning blocks", () => {
+    const extractor = new UniversalReasoningExtractor();
+    const input = `<thinking>First thought</thinking>
+Some content here.
+<reasoning>Second thought</reasoning>
+More content.`;
+
+    const result = extractor.extract(input);
+    expect(result.content).toBe("Some content here.\n\nMore content.");
+    expect(result.reasoning).toContain("First thought");
+    expect(result.reasoning).toContain("Second thought");
+  });
+
+  test("returns original text when no reasoning tags", () => {
+    const extractor = new UniversalReasoningExtractor();
+    const input = "This is just regular text without any reasoning tags.";
+
+    const result = extractor.extract(input);
+    expect(result.content).toBe(input);
+    expect(result.reasoning).toBe("");
+  });
+
+  test("reset clears internal state", () => {
+    const extractor = new UniversalReasoningExtractor();
+
+    extractor.stream("<thinking>Test");
+    extractor.reset();
+
+    const result = extractor.stream("Normal text");
+    expect(result.partial).toBe("Normal text");
+    expect(result.reasoning).toBeUndefined();
+  });
+});

src/lib/server/reasoning-extractor.ts

@@ -0,0 +1,131 @@
+export interface ExtractedContent {
+  reasoning: string;
+  content: string;
+}
+
+export interface StreamResult {
+  partial: string;
+  reasoning?: string;
+  complete: boolean;
+}
+
+export interface ReasoningExtractor {
+  patterns: RegExp[];
+  extract(text: string): ExtractedContent;
+  stream(chunk: string): StreamResult;
+  reset(): void;
+}
+
+export class UniversalReasoningExtractor implements ReasoningExtractor {
+  patterns = [
+    /<thinking>(.*?)<\/thinking>/s,
+    /<think>(.*?)<\/think>/s,
+    /<reasoning>(.*?)<\/reasoning>/s,
+  ];
+
+  private buffer = "";
+  private inReasoning = false;
+  private reasoningBuffer = "";
+  private currentTag: string | null = null;
+
+  extract(text: string): ExtractedContent {
+    let reasoning = "";
+    let cleanContent = text;
+
+    for (const pattern of this.patterns) {
+      const matches = Array.from(
+        text.matchAll(new RegExp(pattern.source, "gs")),
+      );
+
+      for (const match of matches) {
+        if (match[1]) {
+          reasoning += match[1].trim() + "\n";
+          cleanContent = cleanContent.replace(match[0], "");
+        }
+      }
+    }
+
+    return {
+      reasoning: reasoning.trim(),
+      content: cleanContent.trim(),
+    };
+  }
+
+  stream(chunk: string): StreamResult {
+    this.buffer += chunk;
+
+    const result: StreamResult = {
+      partial: "",
+      complete: false,
+    };
+
+    // Check for opening tags
+    if (!this.inReasoning) {
+      const openingMatch = this.buffer.match(/<(thinking|think|reasoning)>/);
+      if (openingMatch) {
+        const beforeTag = this.buffer.substring(0, openingMatch.index);
+        result.partial = beforeTag;
+        this.buffer = this.buffer.substring(
+          openingMatch.index! + openingMatch[0].length,
+        );
+        this.inReasoning = true;
+        this.currentTag = openingMatch[1];
+        return result;
+      }
+    }
+
+    // Check for closing tags
+    if (this.inReasoning && this.currentTag) {
+      const closingTag = `</${this.currentTag}>`;
+      const closingIndex = this.buffer.indexOf(closingTag);
+
+      if (closingIndex !== -1) {
+        this.reasoningBuffer += this.buffer.substring(0, closingIndex);
+        result.reasoning = this.reasoningBuffer.trim();
+        this.reasoningBuffer = "";
+        this.buffer = this.buffer.substring(closingIndex + closingTag.length);
+        this.inReasoning = false;
+        this.currentTag = null;
+
+        // Process any remaining content
+        const nextResult = this.stream("");
+        result.partial = nextResult.partial;
+        if (nextResult.reasoning) {
+          result.reasoning =
+            (result.reasoning || "") + "\n" + nextResult.reasoning;
+        }
+        return result;
+      } else {
+        // Still in reasoning, buffer it
+        this.reasoningBuffer += this.buffer;
+        this.buffer = "";
+        return result;
+      }
+    }
+
+    // No reasoning tags, output as content
+    if (!this.inReasoning && this.buffer.length > 0) {
+      // Check if we might be in the middle of a tag
+      const lastAngle = this.buffer.lastIndexOf("<");
+      if (lastAngle !== -1 && !this.buffer.substring(lastAngle).includes(">")) {
+        // Might be incomplete tag, output everything before it
+        result.partial = this.buffer.substring(0, lastAngle);
+        this.buffer = this.buffer.substring(lastAngle);
+      } else {
+        // Safe to output everything
+        result.partial = this.buffer;
+        this.buffer = "";
+      }
+    }
+
+    result.complete = !this.inReasoning && this.buffer.length === 0;
+    return result;
+  }
+
+  reset(): void {
+    this.buffer = "";
+    this.inReasoning = false;
+    this.reasoningBuffer = "";
+    this.currentTag = null;
+  }
+}

src/lib/stores/agent.ts

@@ -7,6 +7,8 @@ export interface ChatMessage {
   content: string;
   timestamp: number;
   streaming?: boolean;
+  reasoning?: string;
+  showReasoning?: boolean;
 }
 
 export interface AgentState {
@@ -95,6 +97,7 @@ function createAgentStore() {
       processing?: boolean;
       connected?: boolean;
       chunk?: string;
+      reasoning?: string;
       role?: string;
       content?: string;
       error?: string;
@@ -129,6 +132,7 @@ function createAgentStore() {
               content: newContent,
               timestamp: Date.now(),
               streaming: true,
+              reasoning: message.payload.reasoning,
             };
             return {
               ...state,
@@ -138,7 +142,11 @@ function createAgentStore() {
           } else {
             const messages = state.messages.map((msg) => {
               if (msg.id === currentStreamId) {
-                return { ...msg, content: newContent };
+                return {
+                  ...msg,
+                  content: newContent,
+                  reasoning: message.payload.reasoning || msg.reasoning,
+                };
               }
               return msg;
             });

src/lib/tools/context.md

@@ -0,0 +1,37 @@
+# Tools Context
+
+AI agent tools for game manipulation and feedback.
+
+## Structure
+
+- `registry.ts` - Tool registration
+- `parser.ts` - Tool call parsing
+- `executor.ts` - Execution flow
+- `read-game-code.ts` - Editor content reader
+- `write-game-code.ts` - Editor content writer
+- `read-console-output.ts` - Console message reader
+- `index.ts` - Auto-registration
+
+## Architecture
+
+Clean separation:
+
+- Registry handles registration only
+- Parser extracts tool calls from responses
+- Executor manages execution flow
+- Individual tools implement business logic
+
+## Pattern
+
+Agent includes: `[TOOL: tool_name {"param": "value"}]`
+Results formatted: `[TOOL_RESULT: name]` or `[TOOL_ERROR: name]`
+
+## Available Tools
+
+1. **read_game_code** - Returns editor content
+2. **write_game_code** - Updates editor with new code
+3. **read_console_output** - Reads console messages with filtering
+
+## Workflow
+
+Read code → Write changes → Check console → Iterate on feedback

src/lib/tools/executor.ts

@@ -0,0 +1,36 @@
+import { toolRegistry } from "./registry";
+import { parseToolCalls, formatToolResult, type ToolCall } from "./parser";
+
+export interface ToolExecutionResult {
+  toolName: string;
+  formatted: string;
+  raw: {
+    success: boolean;
+    data?: unknown;
+    error?: string;
+  };
+}
+
+export class ToolExecutor {
+  async executeFromResponse(response: string): Promise<ToolExecutionResult[]> {
+    const toolCalls = parseToolCalls(response);
+
+    if (toolCalls.length === 0) {
+      return [];
+    }
+
+    return Promise.all(toolCalls.map((call) => this.executeSingle(call)));
+  }
+
+  private async executeSingle(call: ToolCall): Promise<ToolExecutionResult> {
+    const result = await toolRegistry.execute(call.tool, call.parameters);
+
+    return {
+      toolName: call.tool,
+      formatted: formatToolResult(call.tool, result),
+      raw: result,
+    };
+  }
+}
+
+export const toolExecutor = new ToolExecutor();

src/lib/tools/index.ts

@@ -0,0 +1,17 @@
+export { toolRegistry } from "./registry";
+export type { Tool, ToolResult } from "./registry";
+
+export { parseToolCalls, formatToolResult } from "./parser";
+export type { ToolCall } from "./parser";
+
+export { toolExecutor } from "./executor";
+export type { ToolExecutionResult } from "./executor";
+
+import { toolRegistry } from "./registry";
+import { readGameCodeTool } from "./read-game-code";
+import { writeGameCodeTool } from "./write-game-code";
+import { readConsoleOutputTool } from "./read-console-output";
+
+toolRegistry.register(readGameCodeTool);
+toolRegistry.register(writeGameCodeTool);
+toolRegistry.register(readConsoleOutputTool);

src/lib/tools/parser.ts

@@ -0,0 +1,41 @@
+export interface ToolCall {
+  tool: string;
+  parameters?: unknown;
+}
+
+const TOOL_PATTERN = /\[TOOL:\s*(\w+)(?:\s+({[^}]*}))?\]/g;
+
+export const parseToolCalls = (response: string): ToolCall[] => {
+  const toolCalls: ToolCall[] = [];
+  let match;
+
+  while ((match = TOOL_PATTERN.exec(response)) !== null) {
+    const toolName = match[1];
+    const paramsStr = match[2];
+
+    toolCalls.push({
+      tool: toolName,
+      parameters: paramsStr ? tryParseJson(paramsStr) : undefined,
+    });
+  }
+
+  return toolCalls;
+};
+
+const tryParseJson = (str: string): unknown => {
+  try {
+    return JSON.parse(str);
+  } catch {
+    return undefined;
+  }
+};
+
+export const formatToolResult = (
+  toolName: string,
+  result: { success: boolean; data?: unknown; error?: string },
+): string => {
+  if (result.success) {
+    return `[TOOL_RESULT: ${toolName}]\n${JSON.stringify(result.data, null, 2)}\n[/TOOL_RESULT]`;
+  }
+  return `[TOOL_ERROR: ${toolName}]\n${result.error}\n[/TOOL_ERROR]`;
+};

src/lib/tools/read-console-output.ts

@@ -0,0 +1,47 @@
+import { get } from "svelte/store";
+import { consoleStore } from "../stores/console";
+import type { Tool } from "./registry";
+
+interface ReadConsoleParams {
+  limit?: number;
+  type?: "log" | "warn" | "error" | "info";
+}
+
+export const readConsoleOutputTool: Tool = {
+  name: "read_console_output",
+  description: "Read messages from the game console",
+  execute: async (params: unknown) => {
+    const { limit = 10, type } = (params || {}) as ReadConsoleParams;
+
+    try {
+      const state = get(consoleStore);
+      let messages = state.messages;
+
+      if (type) {
+        messages = messages.filter((msg) => msg.type === type);
+      }
+
+      if (limit > 0) {
+        messages = messages.slice(-limit);
+      }
+
+      return {
+        success: true,
+        data: {
+          messages: messages.map((msg) => ({
+            type: msg.type,
+            message: msg.message,
+            timestamp: msg.timestamp,
+          })),
+          total: messages.length,
+        },
+      };
+    } catch (error) {
+      return {
+        success: false,
+        error:
+          error instanceof Error ? error.message : "Failed to read console",
+      };
+    }
+  },
+};

src/lib/tools/read-game-code.ts

@@ -0,0 +1,18 @@
+import { get } from "svelte/store";
+import { editorStore } from "../stores/editor";
+import type { Tool } from "./registry";
+
+export const readGameCodeTool: Tool = {
+  name: "read_game_code",
+  description: "Get the current game code from the editor",
+  execute: async () => {
+    const state = get(editorStore);
+    return {
+      success: true,
+      data: {
+        content: state.content,
+        language: state.language,
+      },
+    };
+  },
+};

src/lib/tools/registry.ts

@@ -0,0 +1,51 @@
+export interface Tool {
+  name: string;
+  description: string;
+  execute: (params: unknown) => Promise<ToolResult>;
+}
+
+export interface ToolResult {
+  success: boolean;
+  data?: unknown;
+  error?: string;
+}
+
+class ToolRegistry {
+  private tools: Map<string, Tool> = new Map();
+
+  register(tool: Tool): void {
+    this.tools.set(tool.name, tool);
+  }
+
+  async execute(toolName: string, params?: unknown): Promise<ToolResult> {
+    const tool = this.tools.get(toolName);
+
+    if (!tool) {
+      return {
+        success: false,
+        error: `Tool '${toolName}' not found. Available: ${this.getToolNames().join(", ")}`,
+      };
+    }
+
+    try {
+      return await tool.execute(params);
+    } catch (error) {
+      return {
+        success: false,
+        error: error instanceof Error ? error.message : "Unknown error",
+      };
+    }
+  }
+
+  getToolNames(): string[] {
+    return Array.from(this.tools.keys());
+  }
+
+  getToolDescriptions(): string {
+    return Array.from(this.tools.values())
+      .map((tool) => `- ${tool.name}: ${tool.description}`)
+      .join("\n");
+  }
+}
+
+export const toolRegistry = new ToolRegistry();

src/lib/tools/tools-integration.test.ts

@@ -0,0 +1,110 @@
+import { describe, it, expect, beforeEach } from "bun:test";
+import { get } from "svelte/store";
+import { toolRegistry } from "./registry";
+import { editorStore } from "../stores/editor";
+import { consoleStore } from "../stores/console";
+import "./index"; // Import to register tools
+
+describe("Tool Integration", () => {
+  beforeEach(() => {
+    // Reset stores
+    editorStore.setContent("");
+    consoleStore.reset();
+  });
+
+  describe("write_game_code", () => {
+    it("should update editor content", async () => {
+      const testCode = `<world canvas="#game-canvas">
+  <static-part pos="0 0 0" shape="box" size="10 1 10" color="#90ee90"></static-part>
+</world>`;
+
+      const result = await toolRegistry.execute("write_game_code", {
+        content: testCode,
+      });
+
+      expect(result.success).toBe(true);
+      expect(get(editorStore).content).toBe(testCode);
+    });
+
+    it("should handle invalid input", async () => {
+      const result = await toolRegistry.execute("write_game_code", {
+        content: 123, // Invalid type
+      });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain("Content must be a string");
+    });
+  });
+
+  describe("read_game_code", () => {
+    it("should read current editor content", async () => {
+      const testCode = "<world>Test</world>";
+      editorStore.setContent(testCode);
+
+      const result = await toolRegistry.execute("read_game_code");
+
+      expect(result.success).toBe(true);
+      expect(result.data).toEqual({
+        content: testCode,
+        language: "html",
+      });
+    });
+  });
+
+  describe("read_console_output", () => {
+    it("should read console messages", async () => {
+      consoleStore.addMessage("log", "Game started");
+      consoleStore.addMessage("error", "Entity not found");
+      consoleStore.addMessage("warn", "Low performance");
+
+      const result = await toolRegistry.execute("read_console_output", {
+        limit: 2,
+      });
+
+      expect(result.success).toBe(true);
+      const data = result.data as { messages: Array<{ message: string }> };
+      expect(data.messages).toHaveLength(2);
+      expect(data.messages[1].message).toBe("Low performance");
+    });
+
+    it("should filter by type", async () => {
+      consoleStore.addMessage("log", "Info 1");
+      consoleStore.addMessage("error", "Error 1");
+      consoleStore.addMessage("log", "Info 2");
+
+      const result = await toolRegistry.execute("read_console_output", {
+        type: "error",
+      });
+
+      expect(result.success).toBe(true);
+      const data = result.data as { messages: Array<{ message: string }> };
+      expect(data.messages).toHaveLength(1);
+      expect(data.messages[0].message).toBe("Error 1");
+    });
+  });
+
+  describe("Tool workflow", () => {
+    it("should support a complete edit cycle", async () => {
+      // 1. Write some code
+      const code = `<world canvas="#game-canvas">
+  <dynamic-part pos="0 5 0" shape="sphere" size="1" color="#ff0000"></dynamic-part>
+</world>`;
+
+      await toolRegistry.execute("write_game_code", { content: code });
+
+      // 2. Read it back
+      const readResult = await toolRegistry.execute("read_game_code");
+      expect((readResult.data as { content: string }).content).toBe(code);
+
+      // 3. Simulate console output
+      consoleStore.addMessage("log", "Entity created: dynamic-part");
+      consoleStore.addMessage("info", "Physics initialized");
+
+      // 4. Read console
+      const consoleResult = await toolRegistry.execute("read_console_output");
+      expect(consoleResult.success).toBe(true);
+      const messages = (consoleResult.data as { messages: unknown[] }).messages;
+      expect(messages.length).toBeGreaterThan(0);
+    });
+  });
+});

src/lib/tools/write-game-code.ts

@@ -0,0 +1,38 @@
+import { editorStore } from "../stores/editor";
+import type { Tool } from "./registry";
+
+interface WriteGameCodeParams {
+  content: string;
+}
+
+export const writeGameCodeTool: Tool = {
+  name: "write_game_code",
+  description: "Update the game code in the editor",
+  execute: async (params: unknown) => {
+    const { content } = params as WriteGameCodeParams;
+
+    if (typeof content !== "string") {
+      return {
+        success: false,
+        error: "Content must be a string",
+      };
+    }
+
+    try {
+      editorStore.setContent(content);
+
+      return {
+        success: true,
+        data: {
+          message: "Code updated successfully",
+          length: content.length,
+        },
+      };
+    } catch (error) {
+      return {
+        success: false,
+        error: error instanceof Error ? error.message : "Failed to update code",
+      };
+    }
+  },
+};

tsconfig.json

@@ -18,7 +18,7 @@
     "noUnusedParameters": true,
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
-    "types": ["vite/client", "node"]
+    "types": ["vite/client", "node", "bun"]
   },
   "include": ["src/**/*", "src/**/*.svelte", "vite.config.ts"],
   "exclude": ["node_modules", "dist"]