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We often assume that adding files to .gitignore or .geminiignore is enough to keep them private. When it comes to local AI agents, that assumption is dangerously wrong. These ignore files are for version control and file search indexing, not a security shield. An AI assistant with access to your local environment can easily read any file, regardless of your ignore settings. A Simple, Scary Test Let’s prove it. Imagine you have a project with a simple ....

Why This Matters If a backtest seems to “forecast” the future without any explanatory edge, it probably does. The culprit is usually look‑ahead bias: using information you could not have known at the time of the decision. Below are the most common categories, each with a tiny example and a safe fix. These patterns appear in Backtrader, MQL (MetaTrader), PineScript—really in every language and engine. 1) Using Future Bar Values Symptom: The strategy decides using the current bar’s final values (like Close) and assumes an execution that benefits from that same bar’s information....

A salesman must visit a set of cities exactly once and return home, minimizing total travel distance. This deceptively simple puzzle—the Traveling Salesman Problem (TSP)—has haunted mathematicians, computer scientists, and logistics planners for nearly two centuries. It remains one of the most studied problems in computational optimization. Historical Origins The TSP’s roots trace to the 1830s, when Irish mathematician William Rowan Hamilton and British mathematician Thomas Kirkman studied related mathematical problems involving traversing graph vertices....

If you use Anthropic’s Claude Code CLI, you know the struggle: you run a complex prompt or a long refactoring task, switch to another task, and forget to check back for five minutes. I recently came across Andrea Grandi’s post on how to solve this on macOS using terminal-notifier. Linux has a native equivalent that works perfectly. So… here’s how to set up desktop notifications for Claude Code on Linux....

“Now, here, you see, it takes all the running you can do, to keep in the same place. If you want to get somewhere else, you must run at least twice as fast as that!” This quote, spoken by the Red Queen in Lewis Carroll’s Through the Looking-Glass (1871), became one of the most influential metaphors in evolutionary biology—and increasingly, in technology. Origins: From Victorian Nonsense to Scientific Theory Lewis Carroll (Charles Dodgson) was a mathematics lecturer at Oxford when he wrote Through the Looking-Glass....

Running local LLMs is kinda addictive. New model drops? Gotta try it. But here’s the thing—you need a quick way to check if a model’s actually thinking or just spitting out vibes. The Prompt Here’s my go-to sanity check: What is the number that rhymes with the word we use to describe a tall plant? That’s it. Dead simple. Why This Works It’s not about being hard. It’s about being consistent....

How Survivorship Bias Is Costing You Money (And You Don’t Even Know It) Discover how survivorship bias—a cognitive trap born from WWII bomber analysis—distorts investment strategies, startup success rates, and trading decisions. Learn to see what’s missing. The Bullet Holes That Saved Thousands of Lives It’s 1943, and Allied bombers are getting shredded over Europe. Planes limp back to base riddled with bullet holes, and the top brass has a problem....

Some games you finish. Some games finish you. And some games you play over and over, convinced that this time you’ll figure it out—only to end up in the exact same place, wondering if the problem is the game or the player. Lands of Lore: The Throne of Chaos (1993) was that game for me. The Setup Westwood Studios (yes, the Command & Conquer people) created Lands of Lore as their take on the first-person dungeon crawler genre that Eye of the Beholder had popularized....

Welcome to Monthstalgia, a new monthly series where I dig into geeky things I remember fondly from the past. Books, games, software, obscure tech—anything that left a mark on my younger self. The catch? These are memories, not reviews. Some of these things I haven’t touched in decades. And sometimes, I’m keeping it that way on purpose. Wyrm (1998) by Mark Fabi There’s a specific category of books from your formative years: the ones you loved so intensely that you’re now terrified to reread them....

Introduction: Shielding Critical Infrastructure Running 24/7 operations from a home base – whether it’s autonomous trading algorithms or personal management applications – demands more than consumer-grade network hygiene. We’ll cover segmenting your network to contain threats, hardening the perimeter (your router), and securing the endpoints (your servers – be they Raspberry Pis, standard PCs running Ubuntu, or even renterprise gear like Dell or IBM servers you might have… acquired). The goal is maximizing uptime and integrity while minimizing exposure (and money expenditure)....