def route_task(task: dict) -> str:
    """Route task to appropriate model tier."""
    
    complexity = task.get('complexity', 'medium')
    requires_reasoning = task.get('reasoning', False)
    token_count = task.get('estimated_tokens', 0)
    critical = task.get('critical', False)
    
    # ULTRA tier - reserved for critical decisions
    if critical or task.get('type') == 'architecture':
        return 'ULTRA'
    
    # FREE tier - default for most tasks
    if complexity == 'low' and not requires_reasoning:
        return 'FREE'
    
    # ULTRA_CHEAP - simple but needs better than free
    if complexity == 'low' and requires_reasoning:
        return 'ULTRA_CHEAP'
    
    # CHEAP - long context needed
    if token_count > 100_000:
        return 'CHEAP'
    
    # STANDARD - moderate reasoning
    if complexity == 'medium':
        return 'STANDARD'
    
    # PREMIUM - complex analysis
    return 'PREMIUM'

// Cloudflare Worker environment
const ROUTER_CONFIG = {
  FREE: {
    model: 'gemini-2.5-flash',
    apiKey: env.GOOGLE_API_KEY,
    projectId: '171223116958',
    maxTokens: 1_000_000
  },
  ULTRA_CHEAP: {
    model: 'deepseek-v3.2',
    endpoint: 'https://api.deepseek.com/v1/chat/completions',
    apiKey: env.DEEPSEEK_API_KEY
  },
  PREMIUM: {
    model: 'claude-sonnet-4-20250514',
    apiKey: env.ANTHROPIC_API_KEY
  }
};

INSERT INTO daily_metrics (date, tier, calls, tokens, cost_usd)
VALUES (CURRENT_DATE, 'FREE', 1, 5000, 0.00);