Open Source

I'm building CortexDB — an agent-native context database for AI agents

I'm building CortexDB — an agent-native context database for AI agents Most modern RAG systems work like this: Split documents into chunks Generate em…

zlib-rs in Firefox

Most People Misunderstand Object Storage (Here’s the Mental Model That Actually Helps)

If you’ve used S3, MinIO, or any cloud storage API, it’s easy to assume object storage is just a “cloud folder system.” That assumption is wrong — and…

Biome vs Oxlint in 2026: Which Rust-Powered Linter Should You Replace ESLint With

Biome vs Oxlint in 2026: Which Rust-Powered Linter Should You Replace ESLint With Most teams replacing ESLint in 2026 choose the wrong Rust-powered li…

I built a JS/TS runtime in Rust where nothing runs without your permission

Last week I shipped v2.0.2 of 3va — a JavaScript and TypeScript runtime written in Rust. Here is why I built it and what makes it different from Node.…

I built a JS/TS runtime in Rust where nothing runs without your permission

Last week I shipped v2.0.0 of 3va — a JavaScript and TypeScript runtime written in Rust. Here is why I built it and what makes it different from Node.…

Building a Low-Latency Polymarket Bot for Earnings Markets: A Real-World Attempt (Lessons & Technical Breakdown)

A bot on Polymarket quietly extracted $32k in near risk-free profits by sniping “Will Company XYZ Beat Earnings?” markets. It waits for the official r…

Building a KVM Virtual Machine in Rust: Memory Setup

Recap This is a continuation of my previous article which dealt with reverse-engineering QEMU with strace to learn how KVM works. Now it's time to try…

How Solana's Account Model Differs from Ethereum — and Why It Matters for DeFi Developers

If you've built on Ethereum and you're now exploring Solana, the first thing that will trip you up isn't the language (Rust takes getting used to, but…

zinnia: a modular 64-bit Unix-like kernel written in Rust

Building an AI-Resistant Post-Quantum VPN in Rust 🦀 (With an Open Crypto Challenge)

Hello Dev.to! 👋 I'm the architect of an experimental post-quantum VPN protocol called QCRA (Quantum-Chess Routing Architecture). It’s written entirely…

Simulating 2G to build an offline-first sync engine in Rust for rural clinics

hey dev.to, so I am Mathéo, a 2nd year CS student at EPITECH Nancy (France). I want to share a project I have been building for the last few months: Z…

Every elevator has a load plate. Tests are supposed to kill fear, not feed it.

Every elevator has a small metal plate near the doors: 8 persons — 630 kg . It doesn't mean the car snaps at the ninth person. It means an engineer lo…

I Built a Django-Inspired Web Framework in Rust — Here's What I Learned

If you've ever used Django, you know the feeling: one command, and you have an admin panel, an ORM, form validation, middleware, session handling — ev…

APK Install and App Manager in Rust + Tauri — Building ADB Tools

All tests run on an 8-year-old MacBook Air. All results from shipping 7 Mac apps as a solo developer. No sponsored opinion. HiyokoKit includes APK ins…

Bun rewrote itself from Zig to Rust using an LLM in 9 days. That should terrify you.

A major runtime just got machine-translated to a completely different language and merged in under two weeks. Let me say that again slowly. Bun, the J…

IONA OS: Building a sovereign operating system in Rust from scratch – No token, no ICO

I started writing IONA OS on a random night, 13 years ago. Back then, as now, I had no team. I never took money from venture capital funds. And I neve…

Три фикса, четыре ошибки, один файл

# Как мы четыре раза неправильно диагностировали зависание на джобе 281 339 Несколько месяцев назад я писал, [как мы четыре раза неправильно чинили ме…

A program is a tree — building a Verbose compiler in Verbose

Verbose is a small experimental language I'm building. Its compiler proves properties about your code — like termination — and emits tiny, readable x8…

Approval Is Not Enough: Building a Sub‑Microsecond Runtime Governance Gate in Rust

Most AI governance systems check approval once. Then they assume the agent is still authorised to act. That assumption fails silently. Policy changes.…

BoxAgnts Tool System (7) — Skill Templates, Agent Proxies, and Cron Scheduling

BoxAgnts' tool system, from WASM sandbox instruction-level isolation to the Tool trait's unified abstraction to the Provider layer's multi-model adapt…

Building in public, week 13: the debt week nobody posts about

I'm building Convertify, a free image converter, in public over 52 weeks. It's a solo project on Rust + Axum + libvips with a Next.js frontend. This i…

I made a sitemap generator for mdBook. It was my first time releasing a crate!

I'm in high school in Japan. I'm afraid that this article may include some unnatural points. Motivation I'm creating a web document that explains syst…

repo-slopscore: Detecting AI/LLM contributions in git repositories via commit history analysis

Link to source code Disclaimer: This is self-promotion, as I am the author of the tool Comments

Building a SQL Database in Rust: Reducing Memory Usage with Spans and String Interning

I have been working on a PostgreSQL compatible database system in Rust and recently made a couple of changes that significantly reduced unnecessary me…

How to prove what your AI agent actually did (to someone who doesn't trust you)

You let an AI agent edit your repo, run commands, call tools. The next morning someone asks: what did it actually do? And you realize the only honest …

Fitz CLI builder: like typer, but in the language

Build native CLI tools in Fitz with @command , no library to install. Help auto-generated, type-coerced flags, positional args by convention, native b…

Bun rewrote itself from Zig to Rust in 9 days with an LLM. That's terrifying.

It took nine days to rewrite all of Bun from Zig to Rust using an LLM and get the new code to the point where I could merge it. I saw that and my reac…

BoxAgnts Tool System (6) — Multi-Provider Adaptation and the Agent Query Loop

BoxAgnts' tool system, from the bottom-level WASM sandbox to the top-level Tool trait, has solved "how tools run safely." But tools ultimately need to…

ComChan: Terminal-based serial monitor with plotter TUI : r/tui