feat(farm-bridge): replace 3-job aggregator with single clean Dropbox→Claude→WhatsApp bridge

Strips out AG-Refine API, TomTom, Express server, and node-cron scheduling.
Single bridge.js (~100 lines) reads FeedLync/DairyComp files from Dropbox,
generates a Haiku digest, sends to WhatsApp, and saves back to /Farm/Summaries.
One daily Render free cron job instead of three.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KBD2dN2KEjzz3UQFa9hEpu

farm-bridge/.gitignore

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+.env
+node_modules/

farm-bridge/bridge.js

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+/**
+ * Farm Bridge — Dropbox → Claude → WhatsApp
+ * Reads FeedLync and DairyComp files from Dropbox, generates a daily digest
+ * via Claude Haiku, sends to WhatsApp, and saves back to Dropbox.
+ *
+ * Run: node bridge.js
+ * Env: copy .env.example → .env and fill in credentials
+ */
+import 'dotenv/config';
+import Anthropic from '@anthropic-ai/sdk';
+import { Dropbox } from 'dropbox';
+
+const FEEDLYNC  = process.env.DROPBOX_FEEDLYNC_PATH  ?? '/Farm/FeedLync';
+const DAIRYCOMP = process.env.DROPBOX_DAIRYCOMP_PATH ?? '/Farm/DairyComp';
+const OUTBOX    = process.env.DROPBOX_OUTBOX_PATH     ?? '/Farm/Summaries';
+
+const dbx = new Dropbox({
+  clientId:     process.env.DROPBOX_APP_KEY,
+  clientSecret: process.env.DROPBOX_APP_SECRET,
+  refreshToken: process.env.DROPBOX_REFRESH_TOKEN,
+});
+
+const ai = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });
+
+// ── Dropbox helpers ────────────────────────────────────────────────────────
+
+async function readFolder(folder, maxFiles = 5) {
+  let list;
+  try {
+    list = await dbx.filesListFolder({ path: folder });
+  } catch (e) {
+    console.warn(`⚠ Could not read ${folder}: ${e.message}`);
+    return '';
+  }
+
+  const files = list.result.entries
+    .filter(e => e['.tag'] === 'file')
+    .sort((a, b) => new Date(b.client_modified) - new Date(a.client_modified))
+    .slice(0, maxFiles);
+
+  if (!files.length) return '';
+
+  const parts = await Promise.allSettled(
+    files.map(async f => {
+      const dl = await dbx.filesDownload({ path: f.path_lower });
+      return `--- ${f.name} ---\n${dl.result.fileBinary.toString('utf8')}`;
+    })
+  );
+
+  return parts
+    .filter(r => r.status === 'fulfilled')
+    .map(r => r.value)
+    .join('\n\n');
+}
+
+// ── WhatsApp helper ────────────────────────────────────────────────────────
+
+async function sendWhatsApp(text) {
+  const token     = process.env.WHATSAPP_ACCESS_TOKEN;
+  const phoneId   = process.env.WHATSAPP_PHONE_ID;
+  const recipient = process.env.WHATSAPP_RECIPIENT;
+
+  if (!token || !phoneId || !recipient) {
+    console.log('WhatsApp not configured — skipping send.');
+    return;
+  }
+
+  const res = await fetch(`https://graph.facebook.com/v19.0/${phoneId}/messages`, {
+    method:  'POST',
+    headers: { Authorization: `Bearer ${token}`, 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      messaging_product: 'whatsapp',
+      to:   recipient,
+      type: 'text',
+      text: { body: text.slice(0, 4096) },
+    }),
+  });
+
+  if (!res.ok) console.error('WhatsApp error:', await res.text());
+  else         console.log('✅ WhatsApp sent');
+}
+
+// ── Main ───────────────────────────────────────────────────────────────────
+
+async function run() {
+  console.log(`\n── Farm Bridge ${new Date().toISOString()} ─────────────────────`);
+
+  const [feedlync, dairycomp] = await Promise.all([
+    readFolder(FEEDLYNC),
+    readFolder(DAIRYCOMP),
+  ]);
+
+  const sections = [
+    feedlync  && `FeedLync TMR loads:\n${feedlync}`,
+    dairycomp && `DairyComp herd log:\n${dairycomp}`,
+  ].filter(Boolean);
+
+  if (!sections.length) {
+    console.log('No files found in Dropbox. Check DROPBOX_FEEDLYNC_PATH / DROPBOX_DAIRYCOMP_PATH.');
+    return;
+  }
+
+  console.log(`Processing ${sections.length} source(s)…`);
+
+  const msg = await ai.messages.create({
+    model:      'claude-haiku-4-5-20251001',
+    max_tokens: 1024,
+    system: `You are a farm AI analyst for Drumgoon Dairy.
+Analyse FeedLync TMR load records and DairyComp herd logs and produce a clear daily digest.
+Rules:
+- Be specific: cite actual numbers, feedplan names, operators, error percentages, costs.
+- Flag load errors: >5% note, >10% flag, >20% urgent.
+- Lead with what matters most. Farmers are busy — keep it tight.
+FeedLync columns: Start Time, Finish Time, Feedplan/Ingredient, Operator, Device, Planned Quantity, Quantity (mixed), Unloaded Quantity, Error (%), Cost`,
+    messages: [{ role: 'user', content: sections.join('\n\n---\n\n') }],
+  });
+
+  const summary = msg.content[0].text;
+  console.log('\n' + summary + '\n');
+
+  const date    = new Date().toISOString().slice(0, 10);
+  const outPath = `${OUTBOX}/digest_${date}.txt`;
+
+  const [, uploadResult] = await Promise.allSettled([
+    sendWhatsApp(summary),
+    dbx.filesUpload({ path: outPath, contents: summary, mode: { '.tag': 'overwrite' } }),
+  ]);
+
+  if (uploadResult.status === 'fulfilled') console.log(`✅ Saved → ${outPath}`);
+  else console.error('Dropbox upload failed:', uploadResult.reason?.message);
+}
+
+run().catch(e => { console.error('Fatal:', e.message); process.exit(1); });

farm-bridge/package.json

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+{
+  "name": "farm-bridge",
+  "version": "1.0.0",
+  "type": "module",
+  "dependencies": {
+    "@anthropic-ai/sdk": "^0.52.0",
+    "dotenv": "^16.4.5",
+    "dropbox": "^10.34.0"
+  }
+}

farm-bridge/render.yaml

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+services:
+  - type: cron
+    name: farm-bridge
+    runtime: node
+    rootDir: farm-bridge
+    buildCommand: npm install
+    startCommand: node bridge.js
+    schedule: "0 6 * * *"
+    plan: free
+    envVars:
+      - key: ANTHROPIC_API_KEY
+        sync: false
+      - key: DROPBOX_APP_KEY
+        sync: false
+      - key: DROPBOX_APP_SECRET
+        sync: false
+      - key: DROPBOX_REFRESH_TOKEN
+        sync: false
+      - key: DROPBOX_FEEDLYNC_PATH
+        value: /Farm/FeedLync
+      - key: DROPBOX_DAIRYCOMP_PATH
+        value: /Farm/DairyComp
+      - key: DROPBOX_OUTBOX_PATH
+        value: /Farm/Summaries
+      - key: WHATSAPP_ACCESS_TOKEN
+        sync: false
+      - key: WHATSAPP_PHONE_ID
+        sync: false
+      - key: WHATSAPP_RECIPIENT
+        sync: false