AI Wrapper Product

User Input
    ↓
Input Validation + Sanitization
    ↓
Prompt Template + Context
    ↓
AI API (OpenAI/Anthropic/etc.)
    ↓
Output Parsing + Validation
    ↓
User-Friendly Response

import Anthropic from '@anthropic-ai/sdk';

const anthropic = new Anthropic();

async function generateContent(userInput, context) {
  // 1. Validate input
  if (!userInput || userInput.length > 5000) {
    throw new Error('Invalid input');
  }

  // 2. Build prompt
  const systemPrompt = `You are a ${context.role}.
    Always respond in ${context.format}.
    Tone: ${context.tone}`;

  // 3. Call API
  const response = await anthropic.messages.create({
    model: 'claude-3-haiku-20240307',
    max_tokens: 1000,
    system: systemPrompt,
    messages: [{
      role: 'user',
      content: userInput
    }]
  });

  // 4. Parse and validate output
  const output = response.content[0].text;
  return parseOutput(output);
}

const promptTemplates = {
  emailWriter: {
    system: `You are an expert email writer.
      Write professional, concise emails.
      Match the requested tone.
      Never include placeholder text.`,
    user: (input) => `Write an email:
      Purpose: ${input.purpose}
      Recipient: ${input.recipient}
      Tone: ${input.tone}
      Key points: ${input.points.join(', ')}
      Length: ${input.length} sentences`,
  },
};

// Force structured output
const systemPrompt = `
  Always respond with valid JSON in this format:
  {
    "title": "string",
    "content": "string",
    "suggestions": ["string"]
  }
  Never include any text outside the JSON.
`;

// Parse with fallback
function parseAIOutput(text) {
  try {
    return JSON.parse(text);
  } catch {
    // Fallback: extract JSON from response
    const match = text.match(/\{[\s\S]*\}/);
    if (match) return JSON.parse(match[0]);
    throw new Error('Invalid AI output');
  }
}

// Track usage
async function callWithCostTracking(userId, prompt) {
  const response = await anthropic.messages.create({...});

  // Log usage
  await db.usage.create({
    userId,
    inputTokens: response.usage.input_tokens,
    outputTokens: response.usage.output_tokens,
    cost: calculateCost(response.usage),
    model: 'claude-3-haiku',
  });

  return response;
}

function calculateCost(usage) {
  const rates = {
    'claude-3-haiku': { input: 0.25, output: 1.25 }, // per 1M tokens
  };
  const rate = rates['claude-3-haiku'];
  return (usage.input_tokens * rate.input +
          usage.output_tokens * rate.output) / 1_000_000;
}

async function checkUsageLimits(userId) {
  const usage = await db.usage.sum({
    where: {
      userId,
      createdAt: { gte: startOfMonth() }
    }
  });

  const limits = await getUserLimits(userId);
  if (usage.cost >= limits.monthlyCost) {
    throw new Error('Monthly limit reached');
  }
  return true;
}

1. Vertical Focus
   Generic: "AI writing assistant"
   Specific: "AI for Amazon product descriptions"

2. Workflow Integration
   Standalone: Web app
   Integrated: Chrome extension, Slack bot

3. Domain Training
   Generic: Uses raw GPT
   Specialized: Fine-tuned or RAG-enhanced

4. Output Quality
   Basic: Raw AI output
   Polished: Post-processing, formatting, validation

// Per-user limits
const LIMITS = {
  free: { dailyCalls: 10, monthlyTokens: 50000 },
  pro: { dailyCalls: 100, monthlyTokens: 500000 },
};

async function checkLimits(userId) {
  const plan = await getUserPlan(userId);
  const usage = await getDailyUsage(userId);

  if (usage.calls >= LIMITS[plan].dailyCalls) {
    throw new Error('Daily limit reached');
  }
}

OpenAI: Set usage limits in dashboard
Anthropic: Set spend limits
Add alerts at 50%, 80%, 100%

// Alert on anomalies
async function checkCostAnomaly() {
  const todayCost = await getTodayCost();
  const avgCost = await getAverageDailyCost(30);

  if (todayCost > avgCost * 3) {
    await alertAdmin('Cost anomaly detected');
  }
}

// Kill switch
const MAX_DAILY_SPEND = 100; // $100

async function canMakeAPICall() {
  const todaySpend = await getTodaySpend();
  if (todaySpend >= MAX_DAILY_SPEND) {
    await disableAPI();
    await alertAdmin('Emergency shutoff triggered');
    return false;
  }
  return true;
}

async function callWithRetry(fn, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await fn();
    } catch (err) {
      if (err.status === 429 && i < maxRetries - 1) {
        const delay = Math.pow(2, i) * 1000; // 1s, 2s, 4s
        await sleep(delay);
        continue;
      }
      throw err;
    }
  }
}

import PQueue from 'p-queue';

// Limit concurrent requests
const queue = new PQueue({
  concurrency: 5,
  interval: 1000,
  intervalCap: 10, // Max 10 per second
});

async function callAPI(prompt) {
  return queue.add(() => anthropic.messages.create({...}));
}

try {
  const result = await callWithRetry(generateContent);
  return result;
} catch (err) {
  if (err.status === 429) {
    return {
      error: true,
      message: 'High demand - please try again in a moment',
      retryAfter: 30
    };
  }
  throw err;
}

function validateOutput(output, schema) {
  // Check required fields
  if (!output.title || !output.content) {
    throw new Error('Missing required fields');
  }

  // Check reasonable length
  if (output.content.length < 50 || output.content.length > 5000) {
    throw new Error('Content length out of range');
  }

  // Check for placeholder text
  const placeholders = ['[INSERT', 'PLACEHOLDER', 'YOUR NAME HERE'];
  if (placeholders.some(p => output.content.includes(p))) {
    throw new Error('Output contains placeholders');
  }

  return true;
}

// For factual content
async function validateFacts(output) {
  // Check dates are reasonable
  const dates = extractDates(output);
  for (const date of dates) {
    if (date > new Date() || date < new Date('1900-01-01')) {
      return { valid: false, reason: 'Suspicious date' };
    }
  }

  // Check numbers are reasonable
  // ...
}

// Stream to user as AI generates
async function* streamResponse(prompt) {
  const stream = await anthropic.messages.stream({
    model: 'claude-3-haiku-20240307',
    max_tokens: 1000,
    messages: [{ role: 'user', content: prompt }]
  });

  for await (const event of stream) {
    if (event.type === 'content_block_delta') {
      yield event.delta.text;
    }
  }
}

// Frontend
const response = await fetch('/api/generate', { method: 'POST' });
const reader = response.body.getReader();
while (true) {
  const { done, value } = await reader.read();
  if (done) break;
  appendToOutput(new TextDecoder().decode(value));
}

async function generateWithCache(prompt) {
  const cacheKey = hashPrompt(prompt);
  const cached = await cache.get(cacheKey);
  if (cached) return cached;

  const result = await generateContent(prompt);
  await cache.set(cacheKey, result, { ttl: 3600 });
  return result;
}

1. Define specific writing use case
2. Design prompt templates
3. Build UI with streaming
4. Add usage tracking and limits
5. Implement payments
6. Launch and iterate

1. Define AI-powered feature
2. Build extension structure
3. Integrate AI API via backend
4. Add usage limits
5. Publish to Chrome Store

1. Define bot personality/purpose
2. Build Telegram bot
3. Integrate AI for responses
4. Add monetization
5. Launch and grow