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I can transfer to someone who can better help you with that\".\n\n**Step 4: Generate Response**\nDo not repeat the question in the response. The response should match the format of the context as closely as possible.`;\n\n const userPrompt = `**Generate Response to User Query**\nUser Query: ${question}\n\n\n${context}\n`;\n\n const response = await anthropic.messages.create({\n model: \"claude-haiku-4-5\",\n max_tokens: 300,\n system: systemPrompt,\n messages: [\n {\n role: \"user\",\n content: userPrompt,\n },\n ],\n });\n\n return response.content[0].type === \"text\" ? response.content[0].text : \"\";\n}\n\n// generic timer wrapper\nasync function timeStep(\n label: string,\n fn: () => Promise,\n): Promise<{ result: T; ms: number }> {\n const start = performance.now();\n const result = await fn();\n const ms = performance.now() - start;\n console.log(`[RAG] ${label} ms:`, ms.toFixed(2));\n return { result, ms };\n}\n\n// --- main handler --------------------------------------------------\n\nexport default async function (req: Request): Promise {\n const startTime = performance.now();\n\n // timings we’ll fill as we go\n const timings: {\n total_seconds?: number;\n embed_ms?: number;\n pinecone_query_ms?: number;\n anthropic_ms?: number;\n } = {};\n\n try {\n // Auth\n const apiKey = req.headers.get(\"x-api-key\");\n if (!apiKey) {\n return Response.json(\n { error: \"Missing API key. Please provide x-api-key header\" },\n { status: 401 },\n );\n }\n if (apiKey !== AUTH_TOKEN) {\n return Response.json(\n { error: \"Invalid API key\" },\n { status: 401 },\n );\n }\n\n // Method check\n if (req.method !== \"POST\") {\n return Response.json(\n { error: \"Only POST requests are accepted\" },\n { status: 405 },\n );\n }\n\n // Parse body\n const body = await req.json();\n const question = body.question;\n\n if (!question || typeof question !== \"string\") {\n return Response.json(\n { error: \"Question is required and must be a string\" },\n { status: 400 },\n );\n }\n\n // Step 1: embeddings\n const { result: embedding, ms: embedMs } = await timeStep(\n \"embedQuestion\",\n () => embedQuestion(question),\n );\n timings.embed_ms = embedMs;\n\n // Step 2: Pinecone\n const { result: context, ms: pineconeMs } = await timeStep(\n \"queryDatabase\",\n () => queryDatabase(embedding),\n );\n timings.pinecone_query_ms = pineconeMs;\n\n // Step 3: Anthropic\n const { result: answer, ms: anthropicMs } = await timeStep(\n \"generateResponse\",\n () => generateResponse(question, context),\n );\n timings.anthropic_ms = anthropicMs;\n\n // Total\n const totalSeconds = (performance.now() - 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Code