Engineering Insights

Cloudflare One - Hostname routing for Cloudflare Mesh

You can now add hostname routes to a Cloudflare Mesh node, in addition to CIDR routes. Client device Requests wiki.internal.local DNS query ↓ Cloudflare Gateway Returns a token IP, then rewrites the destination to the real private IP. 100.80.0.0/16 Hostname route ↓ Mesh node Forwards traffic to the host on the local network ↓ Private host wiki.internal.local · 10.0.0.50 Instead of managing IP ranges, you can attract traffi

Workers - Work across multiple accounts with Wrangler auth profiles

Wrangler CLI now supports auth profiles: named logins that you scope to specific Cloudflare accounts and switch between automatically, based on the directory you are working in. A profile is a named OAuth login bound to a directory. Commands run in that directory, and its subdirectories, use the matching account — so you can move between accounts without re-running wrangler login. Use profiles to keep a separate login for each client when working at an agency, or to separate staging and producti

Seeing what others miss: A conversation with Gigamon COO Gareth Maclachlan

Gigamon COO Gareth Maclachlan explains how the Gigamon–Elastic partnership delivers deep observability — enabling faster threat detection, Zero Trust enforcement, and AI traffic governance.

A Bootiful Podcast: Sébastien Deleuze on the latest-and-greatest in Spring AI and Spring Framework

Semantic overload: why AI agents get facts wrong

Your AI agent confidently tells a user that the company's parental leave policy is 12 weeks. It's been 16 for the past year. The old HR handbook, the updated one, and the Slack announcement that changed it are all sitting in the retrieval index. The a...

Routing rules now available on AI Gateway

now supports .Vercel AI Gatewayrouting rules Routing rules are firewall-style rules that control which models your team can use, applied at the gateway level instead of in your application code. When a model goes down or gets retired, you usually have to ship a code change to move off it. With routing rules, you push one rule and every request reroutes instantly. There are two types: Rules apply to every request made with your team's AI Gateway credentials. You manage them with the .Vercel CLI C

Cache - Cache multiple versions of a URL with Vary

Your origin can serve different responses for the same URL — different languages based on Accept-Language, or different formats based on Accept — by returning a Vary response header. Cloudflare's cache now honors that header directly in Cache Rules, so the same URL can hold multiple cached versions and each request is matched to the right one. Content that previously had to bypass cache to stay correct can now be cached, following standard HTTP caching behavior. What changed Your origin now deci

Multilingual emails from a Stripe webhook — inferring language from currency

A subtle trap of taking a SaaS international: the system emails sent from your Stripe webhook. Purchase confirmation, renewal success, payment failure, plan change — four kinds of emails triggered by Stripe events. We recently discovered all four had been hardcoded to Japanese for months, sending Japanese receipts and failure notices to English-paying users overseas. The kind of bug that quietly persists forever unless you go looking. This post walks through the currency-based language inference