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LLM Model Routing in 2026: The Guide Every Team Should Read
43+ min ago (1655+ words) Most teams still pick one LLM and send every request to it. That worked in 2023 when there were three viable models. In 2026, with dozens of frontier, mid-tier, and specialist models — each with different pricing, latency, and quality profiles — committing to…...
Engineering Build Notes #3: When 200Gi Was More Storage Than the Nodes Needed
1+ hour, 1+ min ago (1254+ words) How measuring Kubernetes node storage usage led to a simpler capacity decision in an Amazon EKS cluster. In Engineering Build Notes #1, I investigated what initially looked like an opportunity to reduce worker-node capacity. The nodes appeared to have more capacity…...
I made two AIs review each other's code for 30 days. A human still caught the bug in 5 minutes.
2+ hour, 7+ min ago (905+ words) Last month I let AI write 100% of my code for 30 days. The single loudest lesson wasn't "AI is amazing" or "AI is useless." It was one sentence: the thing that writes the code can never be the thing that reviews…...
Record why an approach was rejected—and when to revisit it
2+ hour, 3+ min ago (564+ words) Disclosure: I maintain Selvedge, an open-source decision-history tool. This article was prepared with AI assistance from Grok and Codex. The example below is hypothetical and uses plain Markdown; it does not require a particular product. A repository can show what…...
The best coding agent still gets ~6 in 10 changes wrong. That is your review load.
2+ hour, 20+ min ago (244+ words) While tech review articles argue about what PR length is safe to let an agent produce, the review problem is set by a simpler number: how often the agent is wrong. Specific Labs' Real-SWE benchmark, published September 2026, runs frontier agents…...
56 fault-injection tests passed. The one that injected nothing failed.
2+ hour, 36+ min ago (415+ words) I was building a tool that detects when data quietly changes meaning — a vendor switching units, a source dropping a field, an undocumented enum appearing. The kind of failure where every test passes and every job is green. Claims about…...
Your First AWS Production Architecture: From a Simple Application to a Scalable System
2+ hour, 56+ min ago (1081+ words) Most people learn AWS by studying individual services. RDS is a database. But that's not how AWS is used in the real world. In a real project, these services work together to solve one problem: How do we run an…...
Your Fine-Grained GitHub Token Gets 404, Not 403. Check These Four Things Before the URL.
2+ hour, 54+ min ago (398+ words) Your script calls the GitHub API with a fine-grained personal access token and gets 404 Not Found on a repository you can open in the browser. The URL is right. The repository exists. You will spend the next twenty minutes checking…...
Someone Force-Pushed Over main. Here Is the Reflog Nobody Knows They Have.
2+ hour, 54+ min ago (423+ words) A colleague pushed a fix to main. Ten minutes later you amended a commit message and ran git push --force. Their commit is no longer reachable from any branch on the server. This is the one Git command that can…...
EC2 Instance Unreachable via SSM Session Manager
3+ hour, 22+ min ago (595+ words) This runbook resolves the situation where an EC2 instance is running and visible in the console but either does not appear in the Systems Manager Fleet Manager inventory, or returns a connection error when you attempt to start a Session Manager…...