I already have everything in place except the bridge: a cloud-based WhatsApp API (I hold the Instance ID and Token), an AppSheet app that uses Google Sheets as its data source, and clear workflows I want automated. Here is what I need working end-to-end: whenever activity happens inside Google Sheets—whether a new row is added, a specific cell changes, or a scheduled time hits—AppSheet should fire a webhook that reaches my WhatsApp API and immediately sends message alerts. When customers reply on WhatsApp, their responses must flow back automatically and land in the correct rows or columns in Google Sheets so the AppSheet front end stays updated in real time. Key functions I expect: • Sending message alerts through WhatsApp triggered by: – New row added in Google Sheets – Specific changes in Google Sheets data – Scheduled time-based trigger • Receiving customer responses and writing them straight into the sheet, keeping the data in sync without manual intervention (Yes, automatic synchronization). I will provide sample spreadsheets, the AppSheet app link, the WhatsApp Instance ID and Token, and any webhook URLs you need. All I ask in return is clean, documented code—Google Apps Script, AppSheet webhooks, middleware, or whichever stack you prefer—that I can maintain after hand-off. Show me one or two recent integrations you have done with WhatsApp or AppSheet so I know you understand the nuances. Once we confirm the approach, I’m ready to give you immediate access and get this running.