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Labnotes (by Assaf Arkin)

🔥 All about software design, development, and culture. A mix of insightful and funny. Goes great with coffee. ☕

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Weekend Reading — The Stalk Market

Karel Titeca "Richard Scarry already summarized everything there is to know about cyber security, about 50 years ago." Yes, I just asked DeepSeek V4 to run a security audit of my code, because why not? The code is not super valuable, the service doesn't hold any

Prompt For Progress

Me just asking DeepSeek to make my app go faster, to which it replies with: The cumulative effect across all the changes so far: the list page went from 6 DB queries to 4 (removed merchants + cached rates + cached account), and the edit page went from loading all expenses to

Weekend Reading — The least you can do

a brief history of consumption This week I completed developing the expense report app. This is the software that I am working on for getting all my tax stuff together – receipts, mileage and what not. This is made using Deepseek V4 Flash and the total cost of the project

Expense — receipt tracking for easier tax filing

$9.20 to vibe-code an  app into existence  in one week. It's made of 38,000 lines of code and 15,700 lines of comments. Tests make up about 21% of the code. Spec size is about 3,200 words. I understand that "vibe

Weekend Reading — The elderly health category

Pixelcats "Opened the mail .. Derpy arrived early! SQUEE!" Did I just vibe-code an app because I didn’t like the new UI? Why yes I did. I’ve been using Expensify for many years to keep track of my expenses. It was good. There were

The Art of War, Applied to Litigation

I have an AI agent that helps me handle legal cases. It's not a lawyer, but I can iterate with it for hours on different scenarios, work on collecting evidence, ask clarifying questions, etc. It charges me an hourly rate of $1.20, so 100x cheaper than an

Weekend Reading — Industrial complex

Laura Tech Stuff MacPaw releases CleanMyMac CLI for cleaning developer and AI environments on macOS I love that it's a CLI, super easy to use, and cleans up your developer caches, build artifacts, and AI coding junk. brew install cleanmymac Writing & Editing Stack Using Zed , Harper , Vale

Weekend Reading — I am so far behind on my procrastination

Cat "Jeez, would you look at the time?" Tech Stuff InkLeaf Foldable screen, but not a phone — an e-Ink tablet on which you can read and write. Stylus included. In defense of not understanding your codebase That’s why many engineers take up open-source

Weekend Reading — I’m bringing .exe back

David Phd "The British are adding panels to the Bayeux Tapestry while its in London" Tech Stuff Chatto is now Open Source! Chatto aims to be the group chat application that you actually enjoy using. You’re probably familiar with the one that rhymes with “knack&

Weekend Reading — Hydrate like a data center

Shawn "Fruan" Poulsen "Thirst trap" Tech Stuff SmoothCSV CSV editor without the Excel overhead. Features include smooth cell editing, SQL queries, cell and row swapping, command palette, and more. Since it's a Tauri app, minimal memory usage and super smooth UI. Wordgard Open-source

Weekend Reading — It's gettin' hot in here …

Tjeerd Royaards "Hot. Cartoon from last year." Tech Stuff DevCleaner Free space on your Mac that's currently used by the caches of Xcode, npm, Cursor, Claude, et al. Runs local, minimum memory footprint, and there's a free version. Cotypist Text auto-complete that runs

Weekend Reading — A sourdough finisher

CrankGPT The human-powered, local-first, private AI. Tech Stuff Lettera Based on Bear's remarkable Markdown editor, a standalone app for editing Markdown files from your file system. I like Bear's Markdown editing, so I think Lettera is an interesting idea. Currently beta release, so no

Weekend Reading — Future-proofed like there’s no tomorrow!

Neil "Just because you can...." Tech Stuff OfficeCLI A CLI to help AI create/read/edit Word, Excel, and PowerPoint documents. Open source and doesn't require a Microsoft Office license. I just installed this for the benefit of my 3 AI agents that have to deal

Weekend Reading — Little Bobby ignore all previous instructions

Frechrotz_Pix 'Lego- bzw. Klemmbausteine' Tech Stuff pitchfork A devilishly good daemons manager: start/stop daemon, automatic restarts, health checks, file watching, cron scheduling, and many more useful features. Greg Wilson OH: "Their version of agile is, we can keep changing our mind until it's

I Got $4.84 From a Class Action Settlement and They Really, Really Didn't Want Me to Have It

So here's the thing. When a company loses a class action lawsuit and has to pay millions to regular people, they don't just write you a check. They go out of their way to make sure you never actually get to spend your cut. I'