NANico Acostainbraingrid.hashnode.dev·29m ago · 12 min readWhat Counts as Done? A Founder's Guide to the Definition of DoneYour AI agent says the feature is done. The demo works. The screen looks right. You ship it, and three days later a customer emails to say the signup form swallows their password and never tells them 00
LYLi Yiintoolstack-blog.hashnode.dev·2d ago · 4 min readCompress images in the browser — 20 lines, zero uploadsThe boring problem Almost every "compress your image" site does the same thing: your file leaves the browser, gets uploaded to a bucket, is processed by something on the other end, and comes back as a00
PPowerduckinblogs.powerduck.com·2d ago · 3 min readYour Agent Doesn't Need More Tokens. It Needs Fewer Wrong Files.An agent you trust with a bug fix fails. The reflex: paste the whole repo into context. The 200K window is there, use it. Two runs later, it still edits the wrong module. Not because it couldn't read 00
DSDoogal Simpsonindoogal.dev·4d ago · 5 min readHow to Preserve Key Insertion Order in JavaScriptTL;DR: JavaScript objects do not guarantee insertion order when using integer keys. The ES6 specification forces integer-like keys (array indices) to the front of the object, sorted numerically. To ma00
NANico Acostainbraingrid.hashnode.dev·5d ago · 14 min readWhat Is a Database Migration? The One Change Your AI Agent Makes That Can Lose Real DataMost of what your coding agent does is safe to get wrong. A broken button, a bad layout, a feature that does the wrong thing, all of it is a quick re-prompt away from fixed, because the only thing tha00
NANico Acostainbraingrid.hashnode.dev·6d ago · 14 min readWhat Is a Modular Monolith? The App Structure That Keeps Your AI Agent From Hitting the Complexity WallYour AI agent builds the first three features of your app beautifully. Somewhere around the fifth, it starts breaking the first three. Nobody warns you that the structure of your code, not the skill o01I
NANico Acostainbraingrid.hashnode.dev·Oct 5 · 11 min readThe Best Spec-Driven Development Tools in 2026 (Tested & Compared)Adding a spec-driven development tool does not make your development spec-driven. Most of them just generate a folder of markdown, hand it to the same agent that was already guessing, and call the cer00
VKVikram Kumar Shuklainvikramkumarshukla.hashnode.dev·Oct 4 · 4 min readPython 3.15 missed its ship date. I'll take that trade every time.Python 3.15 was supposed to go final this week. It didn't. Release manager Hugo van Kemenade announced a surprise third release candidate, 3.15.0rc3, and moved the stable build to October 9, 2026. The01I
DSDoogal Simpsonindoogal.dev·Oct 2 · 4 min readPython Integer Caching: Why 256 is 256 but 257 is NotWhy does 256 is 256 evaluate to True, but 257 is 257 return False? Python pre-allocates small integer objects (traditionally -5 to 256) inside a global array to save memory. Because this optimization 11I
DSDoogal Simpsonindoogal.dev·Sep 30 · 4 min readWhy 1:length(x) Fails in R (and How to Use seq_along)In R, writing for (i in 1:length(x)) over an empty vector x causes the loop to run twice. This happens because 1:0 generates a descending sequence of [1, 0]. To prevent this bug, use the idiomatic seq01M
