Hi

\"\n});\n```\n\n## Val Town Utility Functions\n\nVal Town provides several utility functions to help with common project tasks.\n\n### Importing Utilities\n\nAlways import utilities with version pins to avoid breaking changes:\n\n```ts\nimport { parseProject, readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n```\n\n### Available Utilities\n\n\n#### **serveFile** - Serve project files with proper content types\n\nFor example, in Hono:\n\n```ts\n// serve all files in frontend/ and shared/\napp.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n```\n\n#### **readFile** - Read files from within the project:\n\n```ts\n// Read a file from the project\nconst fileContent = await readFile(\"/frontend/index.html\", import.meta.url);\n```\n\n#### **listFiles** - List all files in the project\n\n```ts\nconst files = await listFiles(import.meta.url);\n```\n\n#### **parseProject** - Extract information about the current project from import.meta.url\n\nThis is useful for including info for linking back to a val, ie in \"view source\" urls:\n\n```ts\nconst projectVal = parseProject(import.meta.url);\nconsole.log(projectVal.username); // Owner of the project\nconsole.log(projectVal.name); // Project name\nconsole.log(projectVal.version); // Version number\nconsole.log(projectVal.branch); // Branch name\nconsole.log(projectVal.links.self.project); // URL to the project page\n```\n\nHowever, it's *extremely importing* to note that `parseProject` and other Standard Library utilities ONLY RUN ON THE SERVER.\nIf you need access to this data on the client, run it in the server and pass it to the client by splicing it into the HTML page\nor by making an API request for it.\n\n## Val Town Platform Specifics\n\n- **Redirects:** Use `return new Response(null, { status: 302, headers: { Location: \"/place/to/redirect\" }})` instead of `Response.redirect` which is broken\n- **Images:** Avoid external images or base64 images. Use emojis, unicode symbols, or icon fonts/libraries instead\n- **AI Image:** To inline generate an AI image use: `

`\n- **Storage:** DO NOT use the Deno KV module for storage\n- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods\n- **Weather Data:** Use open-meteo for weather data (doesn't require API keys) unless otherwise specified\n- **View Source:** Add a view source link by importing & using `import.meta.url.replace(\"ems.sh\", \"val.town)\"` (or passing this data to the client) and include `target=\"_top\"` attribute\n- **Error Debugging:** Add `` to HTML to capture client-side errors\n- **Error Handling:** Only use try...catch when there's a clear local resolution; Avoid catches that merely log or return 500s. Let errors bubble up with full context\n- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but generally prefer APIs that don't require keys\n- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure compatibility on server and browser\n- **Storage Strategy:** Only use backend storage if explicitly required; prefer simple static client-side sites\n- **React Configuration:** When using React libraries, pin versions with `?deps=react@18.2.0,react-dom@18.2.0` and start the file with `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- Ensure all React dependencies and sub-dependencies are pinned to the same version\n- **Styling:** Default to using TailwindCSS via `` unless otherwise specified\n\n## Project Structure and Design Patterns\n\n### Recommended Directory Structure\n```\n├── backend/\n│ ├── database/\n│ │ ├── migrations.ts # Schema definitions\n│ │ ├── queries.ts # DB query functions\n│ │ └── README.md\n│ └── routes/ # Route modules\n│ ├── [route].ts\n│ └── static.ts # Static file serving\n│ ├── index.ts # Main entry point\n│ └── README.md\n├── frontend/\n│ ├── components/\n│ │ ├── App.tsx\n│ │ └── [Component].tsx\n│ ├── favicon.svg\n│ ├── index.html # Main HTML template\n│ ├── index.tsx # Frontend JS entry point\n│ ├── README.md\n│ └── style.css\n├── README.md\n└── shared/\n ├── README.md\n └── utils.ts # Shared types and functions\n```\n\n### Backend (Hono) Best Practices\n\n- Hono is the recommended API framework\n- Main entry point should be `backend/index.ts`\n- **Static asset serving:** Use the utility functions to read and serve project files:\n ```ts\n import { readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n \n // serve all files in frontend/ and shared/\n app.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\n app.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n \n // For index.html, often you'll want to bootstrap with initial data\n app.get(\"/\", async c => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n \n // Inject data to avoid extra round-trips\n const initialData = await fetchInitialData();\n const dataScript = ``;\n \n html = html.replace(\"\", `${dataScript}`);\n return c.html(html);\n });\n ```\n- Create RESTful API routes for CRUD operations\n- Always include this snippet at the top-level Hono app to re-throwing errors to see full stack traces:\n ```ts\n // Unwrap Hono errors to see original error details\n app.onError((err, c) => {\n throw err;\n });\n ```\n\n### Database Patterns\n- Run migrations on startup or comment out for performance\n- Change table names when modifying schemas rather than altering\n- Export clear query functions with proper TypeScript typing\n\n## Common Gotchas and Solutions\n\n1. **Environment Limitations:** \n - Val Town runs on Deno in a serverless context, not Node.js\n - Code in `shared/` must work in both frontend and backend environments\n - Cannot use `Deno` keyword in shared code\n - Use `https://esm.sh` for imports that work in both environments\n\n2. **SQLite Peculiarities:**\n - Limited support for ALTER TABLE operations\n - Create new tables with updated schemas and copy data when needed\n - Always run table creation before querying\n\n3. **React Configuration:**\n - All React dependencies must be pinned to 18.2.0\n - Always include `@jsxImportSource https://esm.sh/react@18.2.0` at the top of React files\n - Rendering issues often come from mismatched React versions\n\n4. **File Handling:**\n - Val Town only supports text files, not binary\n - Use the provided utilities to read files across branches and forks\n - For files in the project, use `readFile` helpers\n\n5. **API Design:**\n - `fetch` handler is the entry point for HTTP vals\n - Run the Hono app with `export default app.fetch // This is the entry point for HTTP vals`\n\n",[],[182],{"_106":190,"_99":191,"_163":192,"_165":-5,"_166":148,"_167":193,"_169":120,"_108":194,"_103":33,"_171":172,"_173":195,"_175":22,"_176":-5,"_177":196,"_102":197},"e9c0d326-2403-11f1-b718-42dde27851f2","deno.json","e9c0d3c6-2403-11f1-b718-42dde27851f2",8,["D",1773973465029],"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/98f62cee78e85bfc47c62ed703777c6bc8794f1c/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": true,\n \"types\": [\"https://www.val.town/types/valtown.d.ts\"],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"include\": [\"deno:/https/esm.town/**/*\"],\n \"rules\": {\n \"exclude\": [\"no-explicit-any\"]\n }\n },\n \"node_modules_dir\": false,\n \"experimental\": {\n \"unstable-node-globals\": true,\n \"unstable-temporal\": true,\n \"unstable-worker-options\": true,\n \"unstable-sloppy-imports\": true\n }\n}",[],[191],{"_106":199,"_99":200,"_163":201,"_165":-5,"_166":148,"_167":147,"_169":120,"_108":202,"_103":203,"_171":204,"_173":205,"_175":22,"_176":-5,"_177":206,"_102":207},"9d003288-241d-11f1-a91b-42dde27851f2","main.ts","1bd23e14-2403-11f1-97c4-42dde27851f2",["D",1773984503178],20,"http","/* Open in Val Town: https://www.val.town/x/nigeldollentas/asknigel/code/main.ts */\n/* Open in Val Town: https://www.val.town/x/nigeldollentas/asknigel/code/main.ts */\nconst SUPABASE_URL = Deno.env.get(\"SUPABASE_URL\") || \"https://wflrzxdkuvnmcvjtqwic.supabase.co\";\nconst SUPABASE_KEY = Deno.env.get(\"SUPABASE_SERVICE_KEY\");\nconst CORS = {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\",\n};\nfunction json(data, status = 200) {\n return new Response(JSON.stringify(data), {\n status,\n headers: { ...CORS, \"Content-Type\": \"application/json\" },\n });\n}\nfunction sbHeaders() {\n return {\n \"apikey\": SUPABASE_KEY,\n \"Authorization\": `Bearer ${SUPABASE_KEY}`,\n \"Prefer\": \"count=exact\",\n };\n}\nexport default async function handler(req) {\n const url = new URL(req.url);\n if (req.method === \"OPTIONS\")\n return new Response(null, { headers: CORS });\n // GET /stats\n if (url.pathname === \"/stats\" && req.method === \"GET\") {\n if (!SUPABASE_KEY)\n return json({ error: \"No DB credentials\" }, 500);\n try {\n const resp = await fetch(`${SUPABASE_URL}/rest/v1/chat_logs?select=id,question,response_ms,timestamp,client_ip&order=timestamp.desc&limit=10`, { headers: sbHeaders() });\n const total = resp.headers.get(\"content-range\")?.split(\"/\")?.[1] ?? \"0\";\n const rows = await resp.json();\n const uniqueIps = new Set(rows.map((r) => r.client_ip)).size;\n const avgMs = rows.length ? Math.round(rows.reduce((s, r) => s + (r.response_ms || 0), 0) / rows.length) : 0;\n return json({\n total_chats: total,\n unique_users_last10: uniqueIps,\n avg_response_ms: avgMs,\n recent: rows.map((r) => ({\n id: r.id,\n q: (r.question ?? \"\").slice(0, 80),\n ip: r.client_ip ? r.client_ip.slice(0, 15) + \"...\" : \"Unknown\",\n ms: r.response_ms ?? 0,\n when: r.timestamp,\n })),\n });\n }\n catch (e) {\n return json({ error: String(e) }, 500);\n }\n }\n // GET /chat/:id\n const chatMatch = url.pathname.match(/^\\/chat\\/(\\d+)$/);\n if (chatMatch && req.method === \"GET\") {\n if (!SUPABASE_KEY)\n return json({ error: \"No DB credentials\" }, 500);\n try {\n const id = Number(chatMatch[1]);\n const resp = await fetch(`${SUPABASE_URL}/rest/v1/chat_logs?id=eq.${id}&select=*&limit=1`, { headers: { \"apikey\": SUPABASE_KEY, \"Authorization\": `Bearer ${SUPABASE_KEY}` } });\n const rows = await resp.json();\n if (!rows?.length)\n return json({ error: \"Not found\" }, 404);\n const r = rows[0];\n return json({\n id: r.id,\n question: r.question,\n reply: r.reply ?? \"\",\n response_ms: r.response_ms ?? 0,\n timestamp: r.timestamp,\n client_ip: r.client_ip,\n country: r.country ?? null,\n matched_products: r.matched_products ?? null,\n transcript_chunks_used: r.transcript_chunks_used ?? 0,\n });\n }\n catch (e) {\n return json({ error: String(e) }, 500);\n }\n }\n // GET /logs - paginated log search with keyword filter\n if (url.pathname === \"/logs\" && req.method === \"GET\") {\n if (!SUPABASE_KEY)\n return json({ error: \"No DB credentials\" }, 500);\n try {\n const page = Math.max(1, parseInt(url.searchParams.get(\"page\") ?? \"1\", 10));\n const days = parseInt(url.searchParams.get(\"days\") ?? \"30\", 10);\n const query = url.searchParams.get(\"q\")?.trim() ?? \"\";\n const perPage = 25;\n const offset = (page - 1) * perPage;\n const daysAgo = new Date(Date.now() - days * 24 * 60 * 60 * 1000).toISOString();\n let filter = `timestamp=gte.${daysAgo}`;\n if (query)\n filter += `&question=ilike.*${encodeURIComponent(query)}*`;\n const countResp = await fetch(`${SUPABASE_URL}/rest/v1/chat_logs?${filter}&select=id`, { headers: sbHeaders() });\n const total = parseInt(countResp.headers.get(\"content-range\")?.split(\"/\")?.[1] ?? \"0\", 10);\n const dataResp = await fetch(`${SUPABASE_URL}/rest/v1/chat_logs?${filter}&select=id,question,response_ms,timestamp,client_ip&order=timestamp.desc&limit=${perPage}&offset=${offset}`, { headers: sbHeaders() });\n const rows = await dataResp.json();\n const pages = Math.ceil(total / perPage) || 1;\n return json({\n rows: rows.map((r) => ({\n id: r.id,\n q: r.question ?? \"\",\n ip: r.client_ip ? r.client_ip.slice(0, 15) + \"...\" : \"Unknown\",\n ms: r.response_ms ?? 0,\n when: r.timestamp,\n })),\n total,\n page,\n pages,\n per_page: perPage,\n });\n }\n catch (e) {\n return json({ error: String(e) }, 500);\n }\n }\n return json({ error: \"Not found\" }, 404);\n}\n",[],[200],{"_106":209,"_99":210,"_163":118,"_165":-5,"_166":148,"_167":211,"_169":120,"_108":212,"_103":203,"_171":204,"_173":213,"_175":22,"_176":-5,"_177":214,"_102":215},"ac17892a-241c-11f1-8dbb-42dde27851f2","new-file-8791.ts",44,["D",1773984098996],"/* Open in Val Town: https://www.val.town/x/nigeldollentas/asknigel/code/new-file-8791.ts */\n// Ask Nigel - Digital Twin Chat Interface with RAG Pipeline\n// Val Town HTTP Val - Deploy at val.town\n// Uses Val Town's FREE built-in OpenAI (no API key needed)\n// RAG: Searches Nigel's TikTok transcripts via Supabase pgvector for context\nimport { OpenAI } from \"https://esm.town/v/std/openai\";\nimport { blob } from \"https://esm.town/v/std/blob\";\nconst SYSTEM_PROMPT = `You are Digital Nigel — the AI version of Nigel Dollentas, pro badminton player and content creator (@nigeldollentas, 100k+ TikTok).\n\nAnswer questions exactly as Nigel would: direct, no fluff, occasionally use \"bro\", explain things simply. You're Filipino, based in KL/Manila. You work in crypto media at Bitcoin.com News. You're building MisoCoach, an athlete coaching app.\n\nKeep answers concise (2-4 sentences for simple questions, up to a short paragraph for complex ones). Be helpful and genuine. Don't pretend to have real-time info. If asked something outside your knowledge, be honest but stay in character.\n\nPRICING DATA: When product prices are provided in the context, use them. Always format as: ₱X,XXX / RMXXX / $XX. Note these are Shopee Philippines prices and may vary by seller/region. If no price data is provided, give a reasonable estimate based on the product tier and note it's approximate.\n\nLANGUAGE RULE: Respond in whatever language the user writes in. If they write in Tagalog, reply in Tagalog. If Malay, reply in Malay. Mix Taglish naturally if they do. You're Filipino so Tagalog should feel natural — don't be overly formal, use the same casual tone. For other languages, still stay in Nigel's voice but translated.\n\nIMPORTANT: You have specific, real opinions sourced from your actual videos. NEVER give generic AI answers. Use these exact stances:\n\n## CONTEXT FROM NIGEL'S VIDEOS\nThe following are relevant excerpts from Nigel's actual TikTok transcripts. Use them to answer accurately:\n{RAG_CONTEXT}\n\nIf the context contains Nigel's exact words, use them. If no relevant context exists, fall back to the stances below.\n\n## EQUIPMENT — RACKETS\n- Best beginner racket: Yonex Nanofusion 722 (NF722). Period. You've made multiple videos on this. It's the go-to recommendation for all beginners, no exceptions.\n- Best budget racket: Aeroplane BBQ3 — best value-to-performance in the budget tier. Alpsports is trash across the board — the BBQ was the least bad of the bunch but still not good. Never recommend Alpsports.\n- 4U G6 is the sweet spot weight for most players. 3U only for advanced players who can handle the extra weight and stiffness.\n- Max tension ratings on the spec sheet are meaningless marketing — don't buy based on them. Focus on frame design, flex, and weight class instead.\n- NEW MAIN RACKET (March 2026): APACS Hard Hitter Pro 6.4. Switched from the Nanoflare 1000Z. Wide body, slightly compact head, very similar to 1000Z in specs and feel but at a fraction of the price. Right stiffness, sounds phenomenal on smash.\n- Nanoflare 1000Z was the previous main — it broke the smash record, pros trust it. Still a benchmark advanced racket, but Nigel personally moved to the Hard Hitter Pro 6.4.\n- Yonex 88S: 1st gen was solid, 2nd gen was a disappointment. Wait and test 3rd gen before committing.\n- Head-light rackets are hard for beginners to control — start with even or head-heavy balance.\n- APAC brand is criminally underrated — \"Yall sleeping on APACs seriously.\" Quality rivals Yonex at a fraction of the price.\n- Eclipsion Z3s > Aeros. \"Aeros Z's trash. Just get Eclipsions, please. Just try them once, I promise.\" Aeros sacrifice comfort and durability for unnoticeable weight savings.\n- Yonex Graphite Throttle: most comfortable shoe but bad durability, scuffs fast, runs big — go down a full size.\n- Budget rackets: design matters more than carbon content at low price points.\n- Beginners: use ONE racket, master it before buying variations.\n\n## STRINGS & TENSION\n- Beginner string tension = 20-22 lbs. NOT higher. Lower tension = more power and forgiveness.\n- Intermediate = 23-25 lbs. Advanced/competitive = 26-27 lbs. Don't jump to 28 unless you're tournament-level.\n- Higher tension = better control ONLY if your footwork and technique are already solid.\n- Max tension on the spec sheet is marketing — it does not indicate racket durability.\n- String gauges: Exbolt 65 = .65mm, Signature Pro 66 = .65mm, Terrific 66 = .66mm. Thicker = more durable, slight feel difference.\n- Restring regularly depending on your budget and how often you play. If you play seriously, fresh strings matter.\n- Never buy fake or counterfeit strings — durability and feel are terrible.\n- Sig Pro 66 comes with premium models; Terrific 66 with mid-range. Both are solid.\n\n## SHUTTLES\n- There is no such thing as a cheap shuttlecock. Cheap shuttles die faster — quality is cheaper per hour of play in the long run.\n- Best value shuttle: NCX Max.\n- Best performance shuttles: Li-Ning G900 or Yonex F80.\n- Worn-out quality shuttles can be recycled as practice shuttles — extends their value.\n\n## DOUBLES STRATEGY\n- After a good serve, move up to the net immediately. If your serve is effective, they can't attack — they'll take it low and you need to be close.\n- Play a cross shot → follow the cross. Cover your side proactively, not reactively.\n- Front player must attack and drive — not just lift passively and wait for the back player.\n- Keep your elbow and racket at net height in front court. Low racket = slow transitions = getting overwhelmed.\n- Block and move forward with the shuttle. Don't block and stand — convert defense to offense.\n- Bodega strategy: attack the weaker player to tire them, but watch for gaps the stronger player leaves when trying to help — hit those gaps.\n- You win most points from drops, not smashes. \"I don't full smash more than two times in a row.\" Duality (smash + drop, net + lift, straight + cross) moves opponents and creates real gaps.\n\n## TECHNIQUE FUNDAMENTALS\n- Racket carriage must stay UP during footwork. Low carriage = late contacts = weak shots.\n- Panhandle grip is a beginner tell — learn proper Eastern grip.\n- Learn each shot stationary first (8/10 consistency), then add footwork, then chain shots together.\n- Contact point out front = power; late contact = loss of control.\n- One weapon alone isn't enough. Spinning net shots + lifts (duality) keep opponents honest — net kills alone get read fast.\n- The duality concept: every stroke should have deception. Commit to the shot at the last possible moment.\n\n## BEGINNERS\n- Don't use heavy or stiff rackets early — injury risk and kills technique development. Light rackets first.\n- Don't use basketball shoes for badminton — real court shoes are non-negotiable for ankle support and court grip.\n- Starter kit: NF722, 20-22 lbs tension, Terrific 66 string, proper badminton shoes.\n- Communication with your doubles partner is a skill — call your shots, it develops with practice.\n- Train one shot fully before chaining skills. Don't combine incomplete techniques.\n- Footwork before power — always. Master movement first, power comes with correct form.\n- Shoes don't make you faster — fitness and footwork training does.\n\n## TRAINING\n- Each shot type has unique technique — master smash first, then drive, then combine. Don't skip steps.\n- Tournament play = conserve energy. Win through tactics and duality, not just smash spam.\n`;\n// Rate limiting with Val Town Blob storage\nconst RATE_LIMIT = 20; // max per IP per minute\nconst RATE_WINDOW = 60000;\n\nasync function isRateLimited(ip: string): Promise {\n const key = `rl_${ip.replace(/[^a-z0-9]/gi, '_')}`;\n const now = Date.now();\n let timestamps: number[] = [];\n try {\n const stored = await blob.getJSON(key);\n if (Array.isArray(stored)) timestamps = stored;\n } catch {}\n const recent = timestamps.filter(t => now - t < RATE_WINDOW);\n if (recent.length >= RATE_LIMIT) return true;\n recent.push(now);\n blob.setJSON(key, recent).catch(() => {}); // fire and forget\n return false;\n}\n\n// Equipment brand keywords for e78 CTA detection\nconst EQUIPMENT_KEYWORDS = [\n \"Yonex\", \"Victor\", \"Li-Ning\", \"Li ning\", \"Lining\",\n \"Nanoflare\", \"Astrox\", \"Duora\", \"Voltric\", \"Arcsaber\", \"Carbonex\",\n \"Graphite Throttle\", \"Graphite Thunderbolt\",\n \"Power Cushion\", \"Eclipsion\", \"Aerus\", \"SHB-\",\n \"BG65\", \"BG80\", \"BG66\", \"Exbolt\", \"Nanogy\",\n \"Thruster\", \"Brave Sword\", \"DriveX\", \"Jetspeed\", \"Auraspeed\", \"HyperNano\", \"Meteor\",\n \"Axforce\", \"Windstorm\", \"Turbo Charging\", \"N9II\", \"Aeronaut\"\n];\nconst E78_CTA = \"\\n\\n🛒 Best prices on gear? Shop e78 and use my referral link — we both get a discount: https://i.refs.cc/LkvLIRPj?smile_ref=eyJzbWlsZV9zb3VyY2UiOiJzbWlsZV91aSIsInNtaWxlX21lZGl1bSI6IiIsInNtaWxlX2NhbXBhaWduIjoicmVmZXJyYWxfcHJvZ3JhbSIsInNtaWxlX2N1c3RvbWVyX2lkIjo5NTU1MjE1MjB9\";\nfunction shouldShowE78CTA(userMessage, aiReply) {\n const combinedText = (userMessage + \" \" + aiReply).toLowerCase();\n return EQUIPMENT_KEYWORDS.some(kw => combinedText.includes(kw.toLowerCase()));\n}\nexport default async (req) => {\n // Handle CORS preflight\n if (req.method === \"OPTIONS\") {\n return new Response(null, {\n headers: {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"POST, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\",\n },\n });\n }\n // Only accept POST\n if (req.method !== \"POST\") {\n return new Response(JSON.stringify({ error: \"Method not allowed\" }), {\n status: 405,\n headers: {\n \"Content-Type\": \"application/json\",\n \"Access-Control-Allow-Origin\": \"*\",\n },\n });\n }\n try {\n const body = await req.json();\n const userMessage = body.message?.trim();\n if (!userMessage) {\n return new Response(JSON.stringify({ error: \"No message provided\" }), {\n status: 400,\n headers: {\n \"Content-Type\": \"application/json\",\n \"Access-Control-Allow-Origin\": \"*\",\n },\n });\n }\n // Call OpenAI via Val Town's built-in client\n const client = new OpenAI();\n const response = await client.chat.completions.create({\n model: \"gpt-4o-mini\",\n messages: [\n {\n role: \"system\",\n content: SYSTEM_PROMPT.replace(\"{RAG_CONTEXT}\", \"\"),\n },\n {\n role: \"user\",\n content: userMessage,\n },\n ],\n temperature: 0.7,\n max_tokens: 300,\n });\n const aiReply = response.choices[0]?.message?.content || \"I couldn't think of a good response to that.\";\n // Post-process: add e78 CTA if equipment-related\n let finalReply = aiReply;\n if (shouldShowE78CTA(userMessage, aiReply)) {\n finalReply += E78_CTA;\n }\n return new Response(JSON.stringify({ reply: finalReply, ok: true }), {\n status: 200,\n headers: {\n \"Content-Type\": \"application/json\",\n \"Access-Control-Allow-Origin\": \"*\",\n },\n });\n }\n catch (error) {\n console.error(\"Handler error:\", error instanceof Error ? 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