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📰 Dev.to · Javier Leandro Arancibia

19 articles · Updated every 3 hours · View all reads

All Articles 188,548 Blog Posts 170,396 Tech Tutorials 50,515 Research Papers 36,766 News 23,131 ⚡ AI Lessons

Dev.to · Javier Leandro Arancibia 1d ago

machin v0.140.0: scoping X-Forwarded-For trust to the proxy

v0.140.0 is a small release — one file, 37 lines added — but one of the two changes is the kind of...

Dev.to · Javier Leandro Arancibia 🔧 Backend Engineering 1mo ago

machin v0.133.0: select on Windows, concurrency CI runs there

machin v0.133.0 is out. The headline change is small in diff size but fixes a real gap: select now...

Dev.to · Javier Leandro Arancibia 🔧 Backend Engineering 1mo ago

machin: make([]T, n) and make([]T, len, cap) for slices

A new machin release shipped, headlined by proper support for make([]T, n) and make([]T, len, cap)....

Dev.to · Javier Leandro Arancibia 🏗️ Systems Design & Architecture ⚡ AI Lesson 1mo ago

I benchmarked my language against Rust and Zig, and deleted my best number

I have been building machin for a while — a Go-flavored, type-inferred language that compiles through...

Dev.to · Javier Leandro Arancibia 🔧 Backend Engineering ⚡ AI Lesson 1mo ago

My database claimed crash-safety. `kill -9` proved nothing.

I have a small document database called grange. Its README said "crash-safe by construction", and...

Dev.to · Javier Leandro Arancibia 🔧 Backend Engineering ⚡ AI Lesson 2mo ago

I built a 100 KB git-like VCS that beats git on `add && commit`

I love git. I also spend a lot of time automating things, and every time a script needs to snapshot...

Dev.to · Javier Leandro Arancibia ☁️ DevOps & Cloud ⚡ AI Lesson 2mo ago

rcmd now speaks MCP — your AI agent can manage your servers without SSH

I've been building rcmd, a relay-based remote command tool. No SSH keys, no open ports — your servers...

Dev.to · Javier Leandro Arancibia 📊 Data Analytics & Business Intelligence ⚡ AI Lesson 2mo ago

Web Analytics With No Dashboard (But There Is a 3D Globe)

I built vigie — cookieless web analytics where the primary consumer is an AI agent, not a human...

Dev.to · Javier Leandro Arancibia 🧠 Large Language Models ⚡ AI Lesson 2mo ago

I made my programming language run a 1B LLM at 20 tok/s on a laptop CPU (it beat the reference C by 4x)

I build machin — a small "machine-first" language that compiles through C, designed for AI agents to...

Dev.to · Javier Leandro Arancibia 🤖 AI Agents & Automation ⚡ AI Lesson 2mo ago

Your AI Assistant Can Run Your Website Chatbot Now

I shipped chatsnip this week: a chatbot for your landing page that you install by pasting one script...

Dev.to · Javier Leandro Arancibia 🤖 AI Agents & Automation ⚡ AI Lesson 3mo ago

I let an AI agent write the tests for my access-control layer

Fourth in a series: my RBAC middleware had zero tests. I let an autonomous agent write a 25-test suite for it — mocked, no behavior change, verified green. Acro

Dev.to · Javier Leandro Arancibia 🤖 AI Agents & Automation ⚡ AI Lesson 3mo ago

An AI agent fixed my red Python test suite — without gutting the tests

Third in a series: I gave an autonomous agent a broken Python test suite and told it not to cheat. It found the real design bug, did a proper refactor, and turn

Dev.to · Javier Leandro Arancibia 🤖 AI Agents & Automation ⚡ AI Lesson 3mo ago

Same agent, different language: mago fixed a crashing test in my Zig CLI

After shipping a feature to my Go CLI, I pointed the same autonomous agent at a Zig project with a crashing test. It root-caused the SIGABRT, fixed it in one li

Dev.to · Javier Leandro Arancibia 🤖 AI Agents & Automation ⚡ AI Lesson 3mo ago

I let an autonomous agent fix my own deploy CLI — here is the PR it shipped

I gave an autonomous AI agent (mago) a real issue on my own Go CLI. It wrote the code, the tests, and opened a verified PR in ~3 minutes. Exactly what it did.

Dev.to · Javier Leandro Arancibia ☁️ DevOps & Cloud ⚡ AI Lesson 4mo ago

New act Plugin for SuperCLI

New act Plugin for SuperCLI GitHub Actions local runner — run, list, validate, and test...

Dev.to · Javier Leandro Arancibia ☁️ DevOps & Cloud ⚡ AI Lesson 4mo ago

SuperCLI 1.1.27: 1,184 Curated CLI Tools, One Command

SuperCLI 1.1.27: 1,184 Curated CLI Tools, One Command TL;DR: SuperCLI now bundles 1,184...

Dev.to · Javier Leandro Arancibia 💻 AI-Assisted Coding ⚡ AI Lesson 5mo ago

Introducing SuperCLI: A Config-Driven, AI-Friendly Dynamic CLI for Developers

Introducing SuperCLI: A Config-Driven, AI-Friendly Dynamic CLI for Developers As...

Dev.to · Javier Leandro Arancibia 📣 Digital Marketing & Growth ⚡ AI Lesson 5mo ago

New Dev.to Publish Plugin for SuperCLI: Publish Articles from the Command Line

I just released a new plugin for supercli that lets you publish articles to Dev.to directly from the...

Dev.to · Javier Leandro Arancibia ☁️ DevOps & Cloud ⚡ AI Lesson 5mo ago

How We Made Stateful MCP Servers Work in One-Shot CLI Calls

How We Made Stateful MCP Servers Work in One-Shot CLI Calls The Problem: Stateful...