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ASAghassi Saghassi.hashnode.dev2h ago · 9 min read

My support agent wrote "I can see you were charged". Both lookups had failed.

In September 2026 I built an AI customer support agent and wrote it a realistic duplicate-charge ticket. I ran it once and read the whole run afterwards. There is no real customer in this article. I h

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Bbrunodev1999bigdataexplained.hashnode.devSep 4 · 2 min read

How I built an automated cloud warehouse pricing tracker

Every "BigQuery vs Snowflake cost" article I found while researching this was at least a year old, and cloud pricing changes often enough that the numbers were already wrong. I wanted something that s

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Iiqbalhssn78ihaveatoolforthat.hashnode.devSep 1 · 6 min read

How WebAssembly became our privacy architecture (not just a performance trick)

This one is about something different: how Wasm's sandboxed execution model makes certain privacy failures structurally impossible -- and how we built 90+ browser tools around that property. The Probl

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CICarlos Infantesskillpilotapp.hashnode.devSep 1 · 6 min read

I shipped a paid product with Claude Code. 1,805 green tests didn't catch the bug that mattered.

I built SkillPilot over about three weeks with Claude Code, a set of workflow skills, and a lot of arguing. It is a real product: two Next.js apps on Cloudflare Workers, Supabase for auth and entitlem

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IIgnoredtimeignoredtime.hashnode.devAug 29 · 6 min read

How I Built a Treadmill Pace Calculator in Vanilla JS (No Framework, 60 Lines of Math)

I run on a treadmill three times a week, and every single time the same thing happens: I set the belt to 6.0 mph, then spend the first five minutes trying to remember what pace that actually is. Ten m

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CDChristoph Dieckslashgordon.hashnode.devAug 20 · 6 min read

I Built a Paving Planner Because Herringbone Patterns Made Me Lose My Mind

The story starts with dirt and confusion Early this year I cleared out a patch of wild growth in front of my house and prepped the ground for paving. The surface was ready. The stones were stacked. An

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CDChristoph Dieckslashgordon.hashnode.devAug 19 · 5 min read

I Built a Lottery Simulator to Break My Own Habit. Here's What 1000 Years of Draws Look Like

I'm not stupid. I just liked the dream. Let me be honest for a second. I'm a software engineer. I have a degree. I understand probability. I can explain expected value to you on a whiteboard. And yet,

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RKRituranjan Kumargeekyyadav.hashnode.devAug 7 · 1 min read

I built PXEL: A 100% Client-Side Privacy-First Image & PDF Toolkit (Wasm)

Hey Hashnode Community! 👋 Like many developers and users, I frequently need to compress images, merge PDFs, or crop graphics. But every time I used existing free online tools, I felt uneasy about upl

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RMRaj Mayekarrajmayekar.hashnode.devJul 31 · 3 min read

I Built a Daily Wordle Clone for Developers

If you've ever played Wordle and thought "this would be so much better if it was about programming languages instead of five-letter words," you're exactly who I built this for. Programmdle is a daily

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MPMomcilo Popovmomcilo.hashnode.devJul 17 · 3 min read

I convert videos to printed flipbooks for a living: here's how the pipeline works (FFmpeg print bind)

I spent years shipping software. Now part of my week is printing, binding, and shipping small books. In 2018 we built a side project that turned short videos into flipbooks. It sat idle for years. In

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#showdev

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#showdev

Explore Hashnode

Trending tags this week

My support agent wrote "I can see you were charged". Both lookups had failed.

How I built an automated cloud warehouse pricing tracker

How WebAssembly became our privacy architecture (not just a performance trick)

I shipped a paid product with Claude Code. 1,805 green tests didn't catch the bug that mattered.

How I Built a Treadmill Pace Calculator in Vanilla JS (No Framework, 60 Lines of Math)

I Built a Paving Planner Because Herringbone Patterns Made Me Lose My Mind

I Built a Lottery Simulator to Break My Own Habit. Here's What 1000 Years of Draws Look Like

I built PXEL: A 100% Client-Side Privacy-First Image & PDF Toolkit (Wasm)

I Built a Daily Wordle Clone for Developers

I convert videos to printed flipbooks for a living: here's how the pipeline works (FFmpeg print bind)