Deep dives into debugging, observability, and edge runtime engineering. Written by developers shipping on Workers.
Your Bolt.new app worked in the preview, then broke in production — 'Application error', 500s, or a blank page. Why it happens, the 6 most common causes, and how to see the actual error without being a developer.
console.log not showing up in Cloudflare Workers? Logs empty, delayed, or missing entirely? The 7 real reasons Worker logs disappear — and how to get logs that actually arrive.
How to add a real logger to Next.js — API routes, Server Actions, Route Handlers, and client errors. Structured logs with context that survive Vercel's 1-hour retention limit.
You vibe-coded an app with Lovable, it works in preview, then crashes in production. Here's why it happens and how to see the actual error logs — without being a developer.
Stop copy-pasting error messages into ChatGPT. Connect FlareLog's MCP server to Cursor or Claude and let your AI read your production logs, find the crash, and suggest the fix.
You vibe-coded an app with Lovable, Cursor, or Claude. It works locally but breaks in production. Here's how to set up observability without learning DevOps — and let your AI debug it for you.
Sentry is the default for error monitoring — but on Cloudflare Workers, it misses the crashes that matter most. Here's an honest comparison and when to pick which.
KV writes cost $5 per million — 16x more than reads. Learn why apps using KV as a general-purpose cache hit surprise bills, and how to monitor KV costs in real time.
Error 1101 kills your Worker before it can log anything. Learn the 4 causes of invisible Cloudflare crashes and how to catch them with a Tail Worker in 5 minutes.