Building a WhatsApp Interactive Button & List Message Handler in TypeScript

MCP vs API: When You Need Which, With Real Benchmarks

I built the same small service as a REST API and as a stateless MCP server and measured latency, throughput, bytes and the tokens a model has to read.

3h ago ·dev.to

How to Plan Event-Triggered Email Sequences From Your Product's Events

Triggered emails usually break because the events behind them are vague, not because the copy is bad. Before you build another sequence, write a one-page event plan: the event name, when it fires, its…

3h ago ·dev.to

How One Tool Cut $1.3M in Delivery Losses in Just Two Minutes

FDE‑Gym — The Last Mile of AI Delivery Gets Real‑World Validation Lead “ Two‑minute‑late deliveries cost $1.3 million a year for our fleet ,” a senior engineering director at a leading…

• $1.3M annual loss reduced by half with two-minute delay cuts
• FDE-Gym validation pipeline addresses safety-critical constraints
• Four pilots show 22% latency reduction and 60% delivery rate boost

3h ago ·dev.to

Our validator checked files, not frames — the first external user taught us the difference

auto-xhs is an open-source system that lets an AI agent (Muse, Dots, or Grok Bot) run a Xiaohongshu account end to end: research, writing, video production, posting, and replying to comments.

• Validator missed visual issues in Xiaohongshu video
• Auto-xhs system added frame-by-frame checks
• Users encouraged to submit pull requests for improvements

3h ago ·dev.to

Event-Driven Webhook Queues with RabbitMQ and WhatsApp Cloud API

High-throughput WhatsApp marketing campaigns and conversational bots experience heavy traffic spikes. When sending thousands of broadcast templates or during marketing flash sales, Meta delivers…

• Event-driven architecture prevents server overload from webhook surge
• RabbitMQ and Node.js handle asynchronous processing of webhook events
• Producer validates HMAC, pushes payload to RabbitMQ, responds 200 OK

3h ago ·dev.to