The roast line that made me rewrite my headline
I build small tools. The latest one roasts LinkedIn profiles, and building it meant feeding it the worst profile copy I could find — starting with patterns from…
Englishdev.to Beginners
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Polite feedback never fixed anyone's profile
A short build note on a design decision: why does my LinkedIn tool roast people instead of giving them a friendly checklist? Because I watched the friendly vers…
Englishdev.to Beginners
The capacitor markings that are not microfarads
A capacitor marked 0.1 MFD is not a 0.1 farad part. It is 0.1 microfarad, which is 100 nanofarad, which is the same thing as the 104 sitting next to it in the d…
Englishdev.to Beginners
How to merge PDFs on a Mac without uploading them
Originally published on munchymatess.app . To merge PDFs on a Mac without uploading them, use a tool that runs on the Mac itself. Ours is Munchy Mates : click y…
Englishdev.to Beginners
How to compress a PDF on Mac, and why doing it twice backfires
Originally published on munchymatess.app . To compress a PDF on Mac without uploading it, click your Munchy Mates pet with two fingers, pick Compress PDF and dr…
Englishdev.to Beginners
Avi.js 1.0 Is Here: My Open-Source TypeScript Framework Reaches Its First Stable Release🚀💻
Avi.js 1.0 Is Here: My Open-Source TypeScript Framework Reaches Its First Stable Release 🚀💻 A few weeks ago, I started working on Avi.js, a lightweight TypeScri…
Englishdev.to Node
Keeping Ten Times More Objects Made Garbage Collection Four Times Cheaper
keep 1,000,000 objects alive: 38 ms in GC keep 100,000 objects alive: 155 ms in GC Both runs allocate the same 100 million objects. The second keeps a tenth as …
Englishdev.to Node
4 KB of Text Was Holding 200 MB of Memory
kept: 200 strings, 3.9 KB of text heap: +200.0 MB That's the output of a small test, and the two lines should not be able to coexist. An array holds 200 short I…
Englishdev.to Node
MCP Explained Simply: How to Build a Claude‑Powered AI Agent with AWS Lambda
Ever wondered how Claude can keep context across dozens of calls without re‑sending the whole prompt each time? The Model Context Protocol (MCP) makes that poss…
Englishdev.to Node
Your revenue ranking needs more than a ticker key
Your revenue ranking can change after a join, before any company reports new revenue. You're preparing the account priorities for Friday. The enrichment job has…
Englishdev.to Node
Fifty pages about fifty tests, 210 sources, and the 29 tests we refused to write a page about
CogniPrep simulates employer assessments. Until last week the site had two kinds of page for them: a hub per vendor ( /games/shl , covering the whole suite) and…
Englishdev.to Testing
Nine Dutch pages declare an English twin, and the test proves it by reading the twin's source file
CogniPrep is in English. Last week it got fifteen Dutch pages, at /nl and beneath it: one hub, nine pages about Dutch assessment publishers, and five about test…
Englishdev.to Testing
A WhatsApp AI Assistant Can Sound Certain and Still Be Wrong: A 16-Case Grounding Test
A WhatsApp AI Assistant Can Sound Certain and Still Be Wrong: A 16-Case Grounding Test A business can show a WhatsApp AI assistant a folder of approved FAQs and…
Englishdev.to Testing
Detect Normalized CSV Header Collisions Before Mapping an Order
An order file has both Order ID and order_id . If an adapter trims and normalizes those names before constructing a lookup, the two columns may become the same …
Englishdev.to Testing
My agents kept dropping what resisted. 10 of my 19 vetoes were about that.
On September 30, an agent was building a catalogue of every setting in our back-office, nearly three thousand keys. The goal I had set that day: each key either…
Englishdev.to Testing
What AI Penetration Testing Tools Actually Automate (And What They Don't)
Most of an AI penetration test is not AI. Discovery is a port scan and a crawler. Exploitation is an exploit module. Verification is a request and a response. T…
Englishdev.to Testing
I built a free Omegle alternative with Angular, Socket.io and WebRTC
When Omegle shut down in November 2023, a lot of people lost a simple thing: open a page, click a button, and you're talking to a random person. No account, no …
Englishdev.to Angular
Put an AI agent in one process and day one gives you two walls
Picture an ordinary request: have an AI pull data from thirty websites, clean it up, and turn it into a report. This is not a chat — one question, one answer, d…
Englishdev.to Kubernetes
We downloaded our config in a postStart hook and one pod in four started without it
Our booking service decides which carriers it can book with from a file, carriers.json, that lists each carrier's endpoint and the services it offers. To keep o…
Englishdev.to Kubernetes
Our restart alert resolved itself after ten minutes and the pod kept crashing until Monday
Our EDI poller collects the purchase orders that suppliers drop on our SFTP server and imports them into the ERP. It runs as a single pod with the Recreate stra…
Englishdev.to Kubernetes