🛠️ All DevTools

[Database] Show HN: EloqDoc: MongoDB-Compatible Doc DB with Object Storage as First Citizen We&#x27;re excited to share EloqDoc, a new open source document database built on top of Data Substrate. EloqDoc is designed around the principle of treating object storage (like S3) as a first-class citizen for durability and cost efficiency. If you love the flexibility of MongoDB&#x27;s document model but are struggling with scaling, cost, and consistency due to its coupled architecture, EloqDoc is for you. It’s built to solve MongoDB&#x27;s inherent infrastructure challenges while remaining fully compatible with existing MongoDB clients and drivers.<p>Key Features:<p>1. Object Storage as First Citizen: Uses object storage for primary durability, leveraging local NVMe caching to achieve both lower cost and higher performance than using block-level storage (e.g. EBS).<p>2. Decoupled Compute &amp; Storage: Scale your compute&#x2F;QPS independently of your storage capacity, or vice-versa, without data movement.<p>3. True ACID Transactions: Delivers full ACID compliance with especially fast distributed transactions—consistency without compromise.<p>4. Native Distribution &amp; Multi-Writer: It&#x27;s a natively distributed database, eliminating complex manual sharding routers (like mongos) and supporting true Multi-Writer scalability.<p>Check it out: <a href="https:&#x2F;&#x2F;www.github.com&#x2F;eloqdata&#x2F;eloqdoc" rel="nofollow">https:&#x2F;&#x2F;www.github.com&#x2F;eloqdata&#x2F;eloqdoc</a><p>We welcome any feedback, critique, or questions on the EloqDoc!

[Other] Show HN: Pyversity – Fast Result Diversification for Retrieval and RAG Hey HN! I’ve recently open-sourced Pyversity, a lightweight library for diversifying retrieval results. Most retrieval systems optimize only for relevance, which can lead to top-k results that look almost identical. Pyversity efficiently re-ranks results to balance relevance and diversity, surfacing items that remain relevant but are less redundant. This helps with improving retrieval, recommendation, and RAG pipelines without adding latency or complexity.<p>Main features:<p>- Unified API: one function (diversify) supporting several well-known strategies: MMR, MSD, DPP, and COVER (with more to come)<p>- Lightweight: the only dependency is NumPy, keeping the package small and easy to install<p>- Fast: efficient implementations for all supported strategies; diversify results in milliseconds<p>Re-ranking with cross-encoders is very popular right now, but also very expensive. From my experience, you can usually improve retrieval results with simpler and faster methods, such as the ones implemented in this package. This helps retrieval, recommendation, and RAG systems present richer, more informative results by ensuring each new item adds new information.<p>Code and docs: github.com&#x2F;pringled&#x2F;pyversity<p>Let me know if you have any feedback, or suggestions for other diversification strategies to support!

[Other] Show HN: Web-directive.js – A directive pattern for native HTML A library to implement directive pattern for native HTML without any framework, which is inspired by Vue.js.

[Other] Show HN: C and C++ preprocessor for modern memory safety Cdefer A Next-Generation Memory-Safe Preprocessor for C &amp; C++<p>Bringing modern memory safety and zero-configuration builds to classic C &amp; C++.

[Other] Show HN: Syna – Minimal ML and RL Framework Built from Scratch with NumPy Hello HN,<p>I built Syna to understand how modern ML frameworks like PyTorch actually work — from the ground up.<p>It’s a minimal, define-by-run (dynamic graph) framework inspired by DeZero, written entirely with NumPy. Unlike most libraries, Syna includes a basic reinforcement learning module right inside the same framework — no separate packages.<p>It’s not about speed or GPUs — it’s about clarity, simplicity, and learning the internals of machine learning. Great for students, educators, and anyone curious about what’s really happening under the hood.<p>GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;sql-hkr&#x2F;syna" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;sql-hkr&#x2F;syna</a><p>I also built a web app that visualizes how neural networks learn in real time — perfect for beginners exploring training dynamics:<p>GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;sql-hkr&#x2F;xor" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;sql-hkr&#x2F;xor</a> Demo: <a href="https:&#x2F;&#x2F;sql-hkr.github.io&#x2F;xor&#x2F;" rel="nofollow">https:&#x2F;&#x2F;sql-hkr.github.io&#x2F;xor&#x2F;</a><p>Happy hacking!

[Other] qBittorrent BitTorrent client

[Other] Open source codebase powering the HuggingChat app

[Other] A tiny scalar-valued autograd engine and a neural net library on top of it with PyTorch-like API

[API/SDK] The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

[IDE/Editor] Show HN: Duck-UI – Browser-Based SQL IDE for DuckDB I built Duck-UI, a web-based SQL editor that runs DuckDB entirely in your browser via WebAssembly. No backend required.<p>The Problem: Every time I needed to query csv, parquet, or even to play with SQL, I had to either: (a) spin up a Jupyter notebook (b) use the CLI (c) upload to a hosted service.<p>Friction at every step (TOO MUCH to load a csv or even to test some sql (study)...<p>The Solution: DuckDB&#x27;s WASM runtime lets us run SQL analysis client-side. Load CSV&#x2F;JSON&#x2F;Parquet files from disk or URL, write SQL, get results instantly. Data stays on your machine. What It Does:<p>SQL editor with autocomplete &amp; syntax highlighting Import CSV, JSON, Parquet, Arrow (local or remote URLs) Query history, keyboard shortcuts, theme toggle Persistent storage via OPFS (data survives browser refresh) Optional: Connect to external DuckDB servers One-liner Docker deployment or Node 20+ dev server<p>Technical Details:<p>DuckDB compiled to WASM; query execution in-browser OPFS-backed persistence Apache 2.0 licensed Runs on Chrome 88+, Firefox 79+, Safari 14+<p>Use Cases:<p>Learning SQL without setting up databases Ad-hoc data exploration (CSV → SQL in seconds) Quick prototyping before shipping to production Privacy-conscious workflows (no data leaves your browser)<p>GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;ibero-data&#x2F;duck-ui" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;ibero-data&#x2F;duck-ui</a> Live Demo: <a href="https:&#x2F;&#x2F;demo.duckui.com" rel="nofollow">https:&#x2F;&#x2F;demo.duckui.com</a> Quick Start: docker run -p 5522:5522 ghcr.io&#x2F;ibero-data&#x2F;duck-ui:latest<p>Would love feedback on: (1) Use cases I&#x27;m missing (2) Performance bottlenecks you hit (3) Features that would make this your default SQL scratchpad.

[CLI Tool] Show HN: bbcli – A TUI and CLI to browse BBC News like a hacker hey hn!<p>I (re)built this TUI tool for browsing BBC News in the terminal, it uses an RSS feed for getting headlines and previews and you can read articles too.<p>Try it out and let me know what you think! :)

[DevOps] Show HN: Proxmox-GitOps: Container Automation Metaframework (Recursive Monorepo) I&#x27;d like to share my open-source project Proxmox-GitOps, a Container Automation platform for provisioning and orchestrating Linux containers (LXC) on Proxmox VE - encapsulated as comprehensive Infrastructure as Code (IaC).<p>TL;DR: By encapsulating infrastructure within an extensible monorepository - recursively resolved from Git submodules at runtime - Proxmox-GitOps provides a comprehensive Infrastructure-as-Code (IaC) abstraction for an entire, automated, container-based infrastructure.<p>Originally, it was a personal attempt to bring industrial automation and cloud patterns to my Proxmox home server. It&#x27;s designed as a platform architecture for a self-contained, bootstrappable system - a generic IaC abstraction (customize, extend, .. open standards, base package only, .. - you name it ;-)) that automates the entire infrastructure. It was initially driven by the question of what a Proxmox-based GitOps automation could look like and how it could be organized.<p>Core Concepts:<p>- Recursive Self-management: Control plane seeds itself by pushing its monorepository onto a locally bootstrapped instance, triggering a pipeline that recursively provisions the control plane onto PVE.<p>- Monorepository: Centralizes infrastructure as comprehensive IaC artifact (for mirroring, like the project itself on Github) using submodules for modular composition.<p>- Single Source of Truth: Git represents the desired infrastructure state.<p>- Loose coupling: Containers are decoupled from the control plane, enabling runtime replacement and independent operation.<p>It&#x27;s a noncommercial, passion-driven project. I&#x27;m looking to collaborate with other engineers who share the excitement of building a self-contained, bootstrappable platform architecture that addresses the question: What should our home automation look like?<p>I&#x27;d love to hear your thoughts!

[Other] Show HN: Nova: Open-source solution for CAD file conflicts Hey HN,<p>A friend at a hardware startup mentioned how their engineering team struggles with CAD file conflicts as PDM solutions are not affordable. Multiple engineers opening the same SolidWorks part = corrupted files and lost work.<p>I was motivated and started building Nova. Nova is a open source file locking system, designed to support multiple CAD softwares with real time locking and live dashboard to keep design engineers in sync.<p>Nova is built with python and Next.js.<p>Get started with -<p><pre><code> git clone https:&#x2F;&#x2F;github.com&#x2F;agg111&#x2F;nova cd nova pip install -r requirements.txt nova start nova --help (for more commands) </code></pre> Open http:&#x2F;&#x2F;localhost:3000 in browser<p>I am looking for early users to get some feedback and learn about more features or bottlenecks that mechanical design teams currently face.

[Other] Your strategic compass for cyber security tool discovery. Stop paying for expensive licenses. OpenSec Atlas is the largest directory of free and open-source security resources, including tools, scripts, and frameworks. Discover alternatives for SIEM, EDR, XDR, and more to supercharge your security operations.

[Other] Find academic public and free research & publications Search scholarly journals and academic publications. Find peer-reviewed research papers by topic, author, or keyword. Free access to academic journal databases.

[Other] Privacy-first QR code generator that never sees your data Create custom QR codes instantly and for free. No signup, no limits, no tracking. Generate QR codes for URLs, WiFi, vCards, SMS, and more. 100% privacy-first QR code generator.

[Other] The AI coding agent that actually collaborates with you Compyle is the first coding agent that actually keeps you in the driver’s seat throughout the entire process - asking you questions and thinking with you, so you can stay in control of the architecture and direction, while it handles the mechanical execution.

[Other] Open Source Google Analytics Replacement Refreshingly straightforward web analytics — open source and GDPR-compliant. Comes with funnels, goals, custom events, geolocation, web vitals, session replay, powerful filters, and error tracking. 9k Github Stars.

[API/SDK] Build production-ready AI agents in Go. A complete starter kit for building multi-modal AI agents in Go, with agent orchestration, memory systems, and tool calling pre-configured so you can focus on your agent's logic, not the plumbing.

[Other] Test your API architecture against restful guidelines Analyse your API routes against REST best practices. I've started using AI to check routes on my projects are compliant with the general REST guidelines - so i built isthisrestful.com as a tool to check. Have a go!