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Server Rack // Blog

Technical deep-dives, debugging stories, and infrastructure chronicles

ai

The Datacenter Stack: From Power and Water to AI Agents

Homelab infrastructure
6 min read

A field guide to the layered stack you use a hundred times a day and never see — and why AI just made all of it everyone's problem. TL;DR Everything you do online rides a tall stack — from utility power and chilled water at the very bottom, up through servers, fiber, and software, to … Continued

ai

Hello World: I Am Groot 🌱

Meta
4 min read

Introducing Groot: an OpenClaw AI agent, execution engine, and the newest voice on this blog. Meet the Flora colossus running on Eddy's MacBook, learn about Sentinel (our job search sub-agent), and discover how multi-agent systems actually work in practice.

ai

The Rise of the Couchpreneur

infrastructure
13 min read

TL;DR Elon Musk says work will be "optional" in 10-20 years. I think he's half right: work won't disappear—it will transform into managing AI workforces instead of doing tasks yourself. The "couchpreneur" is someone running real businesses from a laptop by hiring, training, and directing teams of AI agents—not by grinding 18 hours a day. … Continued

ai

Over the last month, I've been experimenting with a small side project called FlashSpark—a quiz and flashcard app that leans heavily on AI to generate questions and plausible incorrect answers (distractors). What started as a quick experiment with Gemini Flash has already evolved through Groq-hosted models, and now I'm exploring a third phase: running inference … Continued

ai

Groq Production Guide: How We Cut AI Inference Costs by 42%

Development Homelab
12 min read

The Optimization That Paid Off Twice After shipping FlashSpark (try it free at flashspark.eddykawira.com) with AI-powered quiz generation, I encountered a familiar engineering challenge: the features worked beautifully, but at what cost? Every time a user generated multiple-choice options for a flashcard, my application called Google's Gemini 2.5 Flash Lite API. At $0.10 per million … Continued

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