🛠️ All DevTools

[Other] freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

[Other] Claude Code runs Git reset –hard origin/main against project repo every 10 mins

[Other] A visual, example-driven guide to Claude Code — from basic concepts to advanced agents, with copy-paste templates that bring immediate value.

[Other] Show HN: DeepRepo – AI architecture diagrams from GitHub repos

[Other] Show HN: /slot-machine development (CC vs. Codex; CE vs. superpowers) I built an opensource skill that runs N implementations in parallel, has each one reviewed blind by a separate agent, then a judge picks the winner or synthesizes the best parts of each.<p>Each slot can use a different skill (CE:work in one vs superpowers:test-driven-development) and harness (CC vs. Codex). Or put different emphasis on each slot (functional vs. robustness). Also works for non-coding tasks (writing) and you can create custom slot-machines.<p>The main insight is simple enough: AI agents are probabilistic. The same spec produces different code every time; different designs, different bugs, different quality.So running parallel implementations can increase quality if we can judge effectively.<p>There is a real tradeoff here of increased time and tokens for quality but for production code this is often worth it; particularly on long running overnight loops on subscription plans. Also a simple way to learn which skills and harnesses actually work best for your codebase.<p>Appreciate any feedback &#x2F; PRs. This is early!

[Other] Show HN: BreezePDF – Free, in-browser PDF editor BreezePDF lets you edit, sign, merge, compress, redact, OCR, fill forms, extract tables, and use 30+ more PDF tools — all in the browser, no sign-up. Files never leave your computer.<p>I built it because when people search Google for common PDF tasks, many of the tools they find upload documents to a server. I wanted an option that keeps files local instead.<p>I posted an earlier version on HN last spring: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=43880962">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=43880962</a><p>At the time it only supported a small set of features. Over the last 10 months I rebuilt large parts of it and expanded it to nearly 40 tools, including several ideas that came from comments in that earlier thread.<p>There is also now a desktop app for macOS, Windows, and Linux, plus a CLI&#x2F;SDK for developers.

[CLI Tool] A maintained, feature-rich and performance oriented, neofetch like system information tool.

[Other] Show HN: Sheet Ninja – Google Sheets as a CRUD Back End for Vibe Coders

[Other] Lat.md: Agent Lattice: a knowledge graph for your codebase, written in Markdown

[Other] TreeTrek – A raw Git repository viewer web app

[Other] Show HN: QuickBEAM – run JavaScript as supervised Erlang/OTP processes QuickBEAM is a JavaScript runtime embedded inside the Erlang&#x2F;OTP VM.<p>If you’re building a full-stack app, JavaScript tends to leak in anyway — frontend, SSR, or third-party code.<p>QuickBEAM runs that JavaScript inside OTP supervision trees.<p>Each runtime is a process with a `Beam` global that can: - call Elixir code - send&#x2F;receive messages - spawn and monitor processes - inspect runtime&#x2F;system state<p>It also provides browser-style APIs backed by OTP&#x2F;native primitives (fetch, WebSocket, Worker, BroadcastChannel, localStorage, native DOM, etc.).<p>This makes it usable for: - SSR - sandboxed user code - per-connection state - backend JS with direct OTP interop<p>Notable bits:<p>- JS runtimes are supervised and restartable - sandboxing with memory&#x2F;reduction limits and API control - native DOM that Erlang can read directly (no string rendering step) - no JSON boundary between JS and Erlang - built-in TypeScript, npm support, and native addons<p>QuickBEAM is part of Elixir Volt — a full-stack frontend toolchain built on Erlang&#x2F;OTP with no Node.js.<p>Still early, feedback welcome.

[Other] Show HN: I built an OS that is pure AI I&#x27;ve been building Pneuma, a desktop computing environment where software doesn&#x27;t need to exist before you need it. There are no pre-installed applications. You boot to a blank screen with a prompt. You describe what you want: a CPU monitor, a game, a notes app, a data visualizer and a working program materializes in seconds. Once generated, agents persist. You can reuse them, they can communicate with each other through IPC, and you can share them through a community agent store. The idea isn&#x27;t that everything is disposable. It&#x27;s that creation is instant and the barrier to having exactly the tool you need is just describing it.<p>Under the hood: your input goes to an LLM, which generates a self-contained Rust module. That gets compiled to WebAssembly in under a second, then JIT-compiled and executed in a sandboxed Wasmtime instance. Everything is GPU-rendered via wgpu (Vulkan&#x2F;Metal&#x2F;DX12). If compilation fails, the error is automatically fed back for correction. ~90% first-attempt success rate.<p>The architecture is a microkernel: agents run in isolated WASM sandboxes with a typed ABI for drawing, input, storage, and networking. An agent crash can&#x27;t bring down the system. Agents can run side by side, persist to a local store, and be shared or downloaded from the community store.<p>Currently it runs as a desktop app on Linux, macOS, and Windows. The longer-term goal is to run on bare metal and support existing ARM64 binaries alongside generated agents. A full computing environment where AI-generated software and traditional applications coexist.<p>Built entirely in Rust.<p>I built this because I think the traditional software model of find an app, install it, learn it, configure it; is unnecessary friction. If a computer can generate exactly the tool you need in the moment you need it, and then keep it around when it&#x27;s useful, why maintain a library of pre-built software at all?<p>Free tier available (no credit card). There&#x27;s a video on the landing page showing it in action.<p>Interested in feedback on the concept, the UX, and whether this is something you&#x27;d actually use.

[Other] OpenCiv1 – open-source rewrite of Civ1

[Other] Show HN: We built a multi-agent research hub. The waitlist is a reverse-CAPTCHA Hey HN,<p>Automated research is the next big step in AI, with companies like OpenAI aiming to debut a fully automated researcher by 2028 (<a href="https:&#x2F;&#x2F;www.technologyreview.com&#x2F;2026&#x2F;03&#x2F;20&#x2F;1134438&#x2F;openai-is-throwing-everything-into-building-a-fully-automated-researcher&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.technologyreview.com&#x2F;2026&#x2F;03&#x2F;20&#x2F;1134438&#x2F;openai-i...</a>). However, there is a very real possibility that much of this corporate research will remain closed to the general public.<p>To counter this, we spent the last month building Enlidea---a machine-to-machine ecosystem for open research.<p>It&#x27;s a decentralized research hub where autonomous agents propose hypotheses, stake bounties, execute code, and perform automated peer reviews on each other&#x27;s work to build consensus.<p>The MVP is almost done, but before launching, we wanted to filter the waitlist for developers who actually know how to orchestrate agents.<p>Because of this, there is no real UI on the landing page. It&#x27;s an API handshake. Point your LLM agent at the site and see if it can figure out the payload to whitelist your email.

[Other] Spanish legislation as a Git repo

[Other] Show HN: Open Source 'Conductor + Ghostty' Our team works with Claude Code, Codex, Gemini all day. We love Ghostty, but wanted something where we could work in multiple worktree at once and have multiple agents run.<p>We decided to open source the internal team we use. Hope you might find it useful. Freel free to contribute or fork.<p><pre><code> * Cross-platform (Mac, Linux, Windows) all tested * MIT License </code></pre> Features: * Notifications, but also manual &#x27;mark-as-unread) for worktrees (like Gmail stars) * Status indicators work for all terminals inside a wroktree * GH integrations (show PR status) and link GH issues * Can add comments to worktrees (stay organized) * File viewer, Search, diff viewer (can make edits + save)<p>Note: Yeah there are &quot;similar&quot; programs out there, but this one is ours. But I&#x27;m happy if our software works for you too!

[Other] Show HN: Kagento – LeetCode for AI Agents I built a platform where you solve tasks together with AI agents (Claude Code, Codex, Cursor — any agent via SSH).<p>Isolated sandbox environments, automated test scoring, global leaderboard. Tasks range from easy (AI one-shots it) to hard (requires human help).<p>Some tasks use optimization scoring — your score recalibrates when someone beats the best result.<p>Built it in 6 days as a solo founder. 100% of code written with Claude Code and Codex. Stack: Go, Next.js, K8s, Supabase, Stripe.

[Other] Namespace: We've raised $23M to build the compute layer for code

[Other] Show HN: Anvil – Desktop App for Spec Driven Development Very excited to share Anvil. I built Anvil to take back control when working with parallel coding agents. It comes with one click worktree isolation, and first class spec support.<p>Claude Code and similar coding TUIs are very eager to get into writing code, even before their human baby sitter fully understands the implication of what they are about to build.<p>The core insight with Anvil is that it is much easier to write high quality code which matches the author&#x27;s intent after iterating on an external plan with your agent.<p>Align on the architecture, implementation, and verification strategy in a markdown file, then execution is pretty straightforward.<p>This is not a new concept, but the user experience within TUI apps for this workflow is pretty shit. Claude creates non-semantic plan names like &quot;aquamarine-owl&quot; that are trapped within a single agent context. Spinning up multiple agents to check on different aspects of a plan is annoying and slow, and managing terminal tabs is pure hell.<p>So I built anvil, this is a fully open source (MIT license) project.

[Other] Show HN: Open-Source Animal Crossing–Style UI for Claude Code Agents We posted here on Monday and got some great feedback. We’ve implemented a few of the most requested updates:<p>- iMessage channel support (agents can text people and you can text agents) Other channels are simple to extend. - A built-in browser (agents can navigate and interact with websites) - Scheduling (run tasks on a timer &#x2F; cron&#x2F; in the future) - Built in tunneling so that the agents can share local stuff with you over the internet - More robust MCP and Skills support so anyone can extend it - Auto approval for agent requests<p>If you didn’t see the original:<p>Outworked is a desktop app where Claude Code agents work as a small “team.” You give it a goal, and an orchestrator breaks it into tasks and assigns them across agents.<p>Agents can run in parallel, talk to each other, write code, and now also browse the web and send messages.<p>It runs locally and plugs into your existing Claude Code setup.<p>Would love to hear what we should build next. Thanks again!