Architecting a Resilient AI API Gateway: Deep Dive into Distributed Rate Limiting

In the modern era of Generative AI, computing power is the ultimate currency, and backend GPUs are fundamentally fragile. If you have ever integrated with an LLM provider, you are intimately familiar with the dreaded 429 Too Many Requests response. Providers enforce these limits to protect their infrastructure from malicious abuse (or poorly written while(true) loops) and to enforce tier-based monetization. If you are a platform engineer exposing an AI model to the world, a robust API Gateway isn’t optional—it is your primary line of defense. ...

February 20, 2026 · 6 min · 1278 words · Aaron Wu

When the GUI Disappears: Google UCP and the Shift to Protocol-First Commerce

中文版請點此 🇹🇼 👉 https://aaronwubuilds.github.io/posts/google-ucp-perspectives-zh/ Yesterday, Google officially announced the Universal Commerce Protocol (UCP). Tech media headlines are screaming “The Death of E-commerce,” but this one-dimensional panic is not only cheap clickbait—it’s fundamentally wrong. As a backend engineer who has navigated the worlds of Big Tech, academia, and startups, I don’t see destruction. I see a displacement of power: a shift from the dominance of the “Platform” back to the purity of the “Protocol.” ...

January 12, 2026 · 6 min · 1152 words · Aaron Wu

當 GUI 介面消失後:從 4 個視角看 Google UCP 協定帶來的「思維重構」

Read English Version 🇺🇸 👉 https://aaronwubuilds.github.io/posts/google-ucp-perspectives-en/ 昨天,Google 正式官宣通用商務協定 (UCP, Universal Commerce Protocol)。媒體標題都在喊「電商死期到了」,但這種單一維度的恐慌不僅廉價,而且錯誤。 身為一名在 大廠 (Big Tech) 、研究界、新創界,都略為留下足跡的後端工程師,我看到的不是毀滅,而是 權力的位移:從強勢的「平台 (Platform)」回歸到純粹的「協定 (Protocol)」。 過去十年,我們習慣了「圍牆花園」——你要買東西得開亞馬遜,要聊天得開微信。但 AI Agent 的出現正在打破這堵牆。當 Shopping Agent 能跨平台直接讀取數據時,我們正面臨一次難得的「重洗牌」。 在這篇文章中,我將 切換四個不同的身份視角(工程師、架構師、商業分析師、創業者),來解構這場變革。對我們來說,最重要的不是 Google 做了什麼,而是我們 不該再做什麼,以及應該開始做什麼。 1. 👨‍💻 工程師視角:從 SEO 到 AEO (Agent Engine Optimization) 以前我們做網站,核心指標是「給人看」。我們會優化 CSS 動畫,設計吸睛的 Landing Page,並在 Meta Tag 裡塞滿關鍵字來討好搜尋引擎 (SEO)。 但 AI Shopping Agent 是機器的邏輯。它不看網頁的「皮」(CSS/HTML),它只讀網頁的「骨」(Data Structure)。當 Agent 接收指令「幫我買最划算的 4K 螢幕」時,它不會被你的精美圖片吸引,而是直接掃描程式碼中的數據結構。 如果你的產品規格只寫在圖片裡(Image-heavy descriptions),或者你的價格是用 JavaScript 動態渲染出來的,對 Agent 來說,你就是「透明」且「不存在」的。 🔄 The Shift: 思維轉向 ❌ 你不該再這樣做 (Stop): ...

January 12, 2026 · 2 min · 336 words · Aaron Wu