🛠️ All DevTools

[Other] Official code repo for the O'Reilly Book - "Hands-On Large Language Models"

[Other] Show HN: OffChess – Offline chess puzzles app Hi HN!<p>I&#x27;m the developer of rdx, a mildly popular ad-free, privacy and user friendly Reddit client. This time, I made something for a very specific use case: solving chess puzzles with no internet.<p>Why? Well, my Wi-Fi is terrible in the bathroom—and that&#x27;s where I do some of my best thinking. I tried printing out “mate in X” puzzles to solve offline, but they weren’t fun without interaction. So I built OffChess.<p>OffChess is an iPhone&#x2F;Android app that contains over 100,000 chess puzzles, fully offline and completely ad-free. You can solve puzzles by category (Mate in 1&#x2F;2&#x2F;3&#x2F;4&#x2F;5, tactics like pins&#x2F;forks&#x2F;skewers, or openings like Sicilian&#x2F;French, etc). You gain or lose points based on how you perform, so there&#x27;s a light rating system to keep things engaging.<p>No accounts, no tracking, no monthly subscriptions, no internet required. Just pure, old-school tactical chess training, wherever you are.<p>You can check out the iPhone&#x2F;iPad app at <a href="https:&#x2F;&#x2F;apps.apple.com&#x2F;us&#x2F;app&#x2F;chess-puzzles-offchess&#x2F;id6744736661?platform=iphone">https:&#x2F;&#x2F;apps.apple.com&#x2F;us&#x2F;app&#x2F;chess-puzzles-offchess&#x2F;id67447...</a> or the Android app at <a href="https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=com.offchess">https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=com.offchess</a><p>Would love feedback, bug reports, or suggestions.<p>Thanks!

[Other] TIL you can make "GIFs" with SVGs for GitHub README.md files

[Other] Leveraging Elixir's hot code loading capabilities to modularize a monolithic app

[CLI Tool] Claude code usage analysis tool Learn how to analyze your Claude Code token usage and costs with ccusage CLI tool. Fast, informative tutorials and examples.

[Other] Own your Auth without Subscription Authgear ONCE is a self-hosted IAM solution that puts you in full control—no subscriptions, no limits. Pay once and own your identity management with powerful, flexible features designed for privacy and ease of deployment. Take back control today!

[API/SDK] Free open-source connectors for data analysts Missing the data you need to build reports? This is a 100% free, open-source library of JavaScript connectors built for data analysts to collect data from ads tools, CRMs, or any possible API - into Sheets or BigQuery. No SaaS contracts. No vendors. Secure.

[Other] Ship App‑Store‑ready mobile apps with AI agents Build and ship App Store ready mobile apps with AI agents. Design visually with full control. Agents handle auth, payments, CMS & more. Tile gives you full-code output and built-in infra so you can launch real apps, fast, without DevOps.

[IDE/Editor] Python playground for rapid prototyping RunPy is a minimalist desktop app for writing and running Python code, designed for rapid prototyping. Available for macOS, Windows, and Linux.

[Other] Never miss a competitive coding contests again. Track upcoming coding contests from Codeforces, LeetCode, CodeChef and more. Bookmark, set reminders, get notified, and stay prepared.

[Code Quality] AI-Powered Security Auditing for Developers SynapseAudit is an AI-powered security tool for developers, detecting 50+ code vulnerabilities across 20+ languages using LLMs like GPT-4. It offers inline fixes, test case generation, and full local analysis—privacy-first, seamless, and GitHub-integrated.

[Other] Your Model. Your Data. Your IP. InsurancGPT is a secure, private LLM tailored for the insurance industry. It helps insurers, MGAs, and brokers automate underwriting, streamline claims, and ensure compliance without black-box APIs or vendor lock-in.

[Other] eady.Batch download Binance Klines. GUI tool. AI ready 🚀 Automate your Binance data pipeline! Download Binance perpetual contract Kline (candlestick) data in bulk for multiple symbols and timeframes. Perfect for backtesting and AI model training. Start automating your trading data collection today!

[API/SDK] DocAPI – Instantly Turn Google Sheets into a Powerful API DocAPI by DataFetchPro lets you connect your Google Sheets to the web in seconds — no coding required. Whether you're building dashboards, automating workflows, or integrating with apps, DocAPI exposes your spreadsheet data as secure, scalable RESTful APIs.

[Other] The Voice OS for Developers Control your dev workflow with your voice. End the mentally expensive context switching that takes up almost half your day by skipping the alt-tabbing, clicking, and typing. Just speak to deploy, document, or debug. Powered by MCP, Saga keeps you in flow.

[Other] Overlay Figma & screenshots directly on-screen for fast QA DesignSync helps UI/UX designers and developers quickly validate visual accuracy. You can overlay any design asset — like Figma exports, screenshots, or mockups — directly on your screen, then adjust opacity, alignment, and capture annotated feedback.

[DevOps] The framework for building & shipping MCP applications Designed with DX in mind, this open-source project streamlines development and makes it easier to build and deploy powerful tools on the Model Context Protocol ecosystem.

[CLI Tool] The best DX for building voice AI Command-line interface that brings world-class DX to voice AI development. Drop Vapi into any project with one command, debug webhooks locally, and turn your IDE into a Vapi expert with MCP integration.

[Other] Analyzing database trends through 1.8M Hacker News headlines

[API/SDK] Show HN: I built a single API to post on all social platforms Building integrations for TikTok, X, Facebook, Instagram, YouTube, and LinkedIn got frustrating with how different every platform is with auth setup, rate limits, and media requirements. So we built Post for Me: one REST API that handles scheduling and publishing posts for TikTok, Facebook, Instagram, X, YouTube, LinkedIn, Pinterest, Bluesky, and Threads.<p>It&#x27;s built for developers. You bring your own app credentials from the social platform, so you&#x27;re in control of your data. There&#x27;s no limitations on account connections, and pricing is based on usage (not some arbitrary limitations). We wanted the API we wish we had when we first started.<p>What it does - A single POST replaces a dozen different calls - Pay-per-post metered pricing (volume discounts) and a free tier (no seat fees) - Cascading configs: set captions&#x2F;media globally, then override per platform or account<p>Try it at <a href="https:&#x2F;&#x2F;www.postform.dev" rel="nofollow">https:&#x2F;&#x2F;www.postform.dev</a>. Would love feedback, bug reports, or architecture questions!