🛠️ All DevTools

[Other] The open-source managed agents platform. Turn coding agents into real teammates — assign tasks, track progress, compound skills.

[Other] Show HN: Git why – log your agent reasoning trace along your code I was frustrated with not being able to know why the code written by my colleague agents was in the codebase, so I build a tool to version agent trace along code in git.

[Other] How to build a `Git diff` driver

[Other] Show HN: Docker-whisper: Self-hosted Whisper speech-to-text server (OpenAI API)

[CLI Tool] Show HN: Waffle – Native macOS terminal that auto-tiles sessions into a grid Hi HN. I built Waffle because I kept ending up with 15 terminal windows scattered across three spaces with no idea what was running where.<p>Splitting&#x2F;merging in iTerm kind of works but it never felt intuitive to me.<p>With that in mind, I built something to suit my workflow:<p>Waffle is a native macOS terminal (Built on Miguel de Icaza&#x27;s SwiftTerm) that tiles your sessions into an auto-scaling grid automatically. 1 session is fullscreen, 2 is side by side, 4 is 2x2, 9 is 3x3. Open a terminal, it joins the grid. Close one, the grid rebalances. No splitting, no config.<p>I&#x27;ve been using it a lot recently and one thing I&#x27;ve found really useful is that sessions detect which repo they&#x27;re in and group accordingly. Each project gets a distinct colour. Cmd+[ and Cmd+] flip between groups. If you have three repos open across eight terminals, you can filter to just one project&#x27;s sessions instantly. Also, no accidentally closing a window with CMD-W as it gives you a confirmation and requires a second CMD-W to close.<p>Honestly, if you live in tmux, this probably isn&#x27;t for you but it&#x27;s really helped to speed up my workflow.<p>Other things: It comes with a handful of themes (and has support for iTerm themes), bundled JetBrains mono, has keyboard shortcuts for everything. Free, no account, opt-in analytics only. macOS 14+.<p>There&#x27;s a demo on the landing page if you want to see it in action.

[Other] Show HN: I rebuilt a 2000s browser strategy game on Cloudflare's edge I grew up in Germany in the early 2000s playing a browser game called Inselkampf. You built up an island, mined gold and stone, cut down trees for wood, raised armies, sent fleets across an ocean grid, joined alliances and got betrayed by them. Same genre as OGame or Travian. It shut down in 2014 and I never found anything that replaced that feeling of checking in before school to see if your fleet had arrived and your alliance was still alive.<p>I finally built the version I wanted to play. Kampfinsel is live at kampfinsel.com right now with real players on it. It&#x27;s not a straight copy of the old game. I gave it its own world. No magic, no gunpowder – just ballistas, fire pots, and slow ships crossing huge distances. Three resources: gold, stone, wood. Travel between islands takes hours, not seconds. It&#x27;s slow on purpose.<p>The whole thing runs on Cloudflare&#x27;s edge. Workers for the game logic and API, D1 for the database, KV for sessions and caching, R2 for assets and Durable Objects for per-island state and the tick system (fleet arrivals, combat, resource generation). There&#x27;s no origin server at all. Making a stateful multiplayer game work inside Workers&#x27; CPU limits and D1&#x27;s consistency model meant some non-obvious choices: resources are calculated on-read from timestamps instead of being ticked into the database, fleet movements live in Durable Object alarms and combat writes are batched. This helped me a lot!<p>The look is intentionally rough and text-heavy (Hi HN!): server-rendered HTML, tables, a parchment color palette, Unicode icons, no frontend framework, no build step. The only JavaScript is for countdown timers and auto-refresh. I wanted it to feel the way I remember these games looking, not how they actually looked. Honestly, it looks a lot like HN itself - tables, monospace, no chrome. If you like how this site looks, you&#x27;ll probably feel at home.<p>No signup wall, no premium currency, no pay-to-win. Feedback very welcome, especially from anyone who played this kind of game back in the day or has opinions on running stateful stuff on Workers + D1 + Durable Objects. I&#x27;ll be around for the next few hours.

[Other] practice made claude perfect

[Other] A single CLAUDE.md file to improve Claude Code behavior, derived from Andrej Karpathy's observations on LLM coding pitfalls.

[Other] Show HN: A WYSIWYG word processor in Python Hi all,<p>Finding a good data structure for a word processor is a difficult problem. My notebook diaries on the problem go back 25 years when I was frustrated with using Word for my diploma thesis - it was slow and unstable at that time. I ended up getting pretty hooked on the problem.<p>Right now I’m taking a professional break and decided to finally use the time to push these ideas further, and build MiniWord — a WYSIWYG word processor in Python.<p>My goal is to have a native, non-HTML-based editor that stays simple, fast, and is hackable. So far I am focusing on getting the fundamentals right. What is working yet is:<p>- Real WYSIWYG editing (no HTML layer, no embedded browser) with styles, images and tables.<p>- Clean, simple file format (human-readable, diff-friendly, git-friendly, AI-friendly)<p>- Markdown support<p>- Support for Python-plugins<p><i>Things that I found:</i><p>- B-tree structures are perfect for holding rich text data<p>- A simple text-based file format is incredibly useful — you can diff documents, version them, and even process them with AI tools quite naturally<p><i>What I’d love feedback on:</i><p>- Where do you see real use cases for something like this?<p>- What would be missing for you to take it seriously as a tool or platform?<p>- What kinds of plugins or extensions would actually be worth building?<p>Happy about any thoughts — positive or critical. Greetings

[Other] Show HN: FluidCAD – Parametric CAD with JavaScript Hello HN users,<p>This is a CAD by code project I have been working on on my free time for more than year now.<p>I built it with 3 goals in mind:<p>- It should be familiar to CAD designers who have used other programs. Same workflow, same terminology.<p>- Reduce the mental effort required to create models as much as possible. This is achieved by:<p><pre><code> - Provide live rendering and visual guidance as you type. - Allow the user to reference existing edges&#x2F;faces on the scene instead of having to calculate everything. - Provide interactive mouse helpers for features that are hard to write by code: Only 3 interactive modes for now: Edge trimming, Sketch region extrude, Bezier curve drawing. - Implicit coding whenever possible: e.g: There are sensible defaults for most parameters. The program will automatically fuse intersecting objects together so you do not have to worry about what object needs to be fused with what.</code></pre> - It should be reasonably fast: The scene objects are cached and only the updated objects are re-computed.<p>I think I have achieved these goals to a good extent. The program is still in early stages and there are many features I want to add, rewrite but I think it is already usable for simple models.<p>Update to add more details: This is based on Opencascade.js WASM binding. So you get all the good things that come with any brep kernel. Fillets, chamfers, step import and export...<p>The scene is webview but the editing is in your local file. You use your own editor and the environment you are familiar with.<p>One important feature that I think make this stand out among other code based cad software is the ability to transform features not just shapes. More here: <a href="https:&#x2F;&#x2F;fluidcad.io&#x2F;docs&#x2F;guides&#x2F;patterns" rel="nofollow">https:&#x2F;&#x2F;fluidcad.io&#x2F;docs&#x2F;guides&#x2F;patterns</a> You can see it in action in the lantern example: <a href="https:&#x2F;&#x2F;fluidcad.io&#x2F;docs&#x2F;tutorials&#x2F;lantern" rel="nofollow">https:&#x2F;&#x2F;fluidcad.io&#x2F;docs&#x2F;tutorials&#x2F;lantern</a>

[Other] JSON Formatter Chrome Plugin Now Closed and Injecting Adware

[Other] Show HN: I run AI background removal in the browser–no upload,no server RMBG-1.4 + SAM running client-side via ONNX Runtime WASM. ~2s on laptop, works on mobile. Your image never leaves the browser.<p>Built this as part of allplix.com. 19yo student in France, solo project.<p>Happy to talk about the WASM pipeline or the pain of running ML models in a browser tab.

[Other] Show HN: Eve – Managed OpenClaw for work Eve is an AI agent harness that runs in an isolated Linux sandbox (2 vCPUs, 4GB RAM, 10GB disk) with a real filesystem, headless Chromium, code execution, and connectors to 1000+ services.<p>You give it a task and it works in the background until it&#x27;s done.<p>I built this because I wanted OpenClaw without the self-hosting, pointed at actual day-to-day work. I’m thinking less personal assistant and more helpful colleague.<p>Here’s a short demo video: <a href="https:&#x2F;&#x2F;www.loom.com&#x2F;share&#x2F;00d11bdbe804478e8817710f5f53ac61" rel="nofollow">https:&#x2F;&#x2F;www.loom.com&#x2F;share&#x2F;00d11bdbe804478e8817710f5f53ac61</a><p>The main interface is a web app where you can watch work happen in real time (agents spawning, files being written, use of the CLI). There&#x27;s also an iMessage integration so you can fire a task asynchronously, put your phone down, and get a reply when it&#x27;s finished.<p>Under the hood, there&#x27;s an orchestrator (Claude Opus 4.6) that routes to the right domain-specific model for each subtask: browsing, coding, research, and media generation.<p>For complex tasks it spins up parallel sub-agents that coordinate through the shared filesystem. They have persistent memory across sessions so context compounds over time.<p>I’ve packaged it with a bunch of pre-installed skills so it can execute in a variety of job roles (sales, marketing, finance) at runtime.<p>Here are a few things Eve has helped me with in the last couple days:<p>- Edit this demo video with a voice over of Garry: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=S4oD7H3cAQ0" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=S4oD7H3cAQ0</a><p>- Do my tax returns<p>- To build HN as if it was the year 2030: <a href="https:&#x2F;&#x2F;api.eve.new&#x2F;api&#x2F;sites&#x2F;hackernews-2030&#x2F;#&#x2F;" rel="nofollow">https:&#x2F;&#x2F;api.eve.new&#x2F;api&#x2F;sites&#x2F;hackernews-2030&#x2F;#&#x2F;</a><p>AMA on the architecture and lmk your thoughts :)<p>P.S. I&#x27;ve given every new user $100 worth of credits to try it.

[DevOps] Launch HN: Twill.ai (YC S25) – Delegate to cloud agents, get back PRs Hey HN, we&#x27;re Willy and Dan, co-founders of Twill.ai (<a href="https:&#x2F;&#x2F;twill.ai&#x2F;">https:&#x2F;&#x2F;twill.ai&#x2F;</a>). Twill runs coding CLIs like Claude Code and Codex in isolated cloud sandboxes. You hand it work through Slack, GitHub, Linear, our web app or CLI, and it comes back with a PR, a review, a diagnosis, or a follow-up question. It loops you in when it needs your input, so you stay in control.<p>Demo: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=oyfTMXVECbs" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=oyfTMXVECbs</a><p>Before Twill, building with Claude Code locally, we kept hitting three walls<p>1. Parallelization: two tasks that both touch your Docker config or the same infra files are painful to run locally at once, and manual port rebinding and separate build contexts don&#x27;t scale past a couple of tasks.<p>2. Persistence: close your laptop and the agent stops. We wanted to kick off a batch of tasks before bed and wake up to PRs.<p>3. Trust: giving an autonomous agent full access to your local filesystem and processes is a leap, and a sandbox per task felt safer to run unattended.<p>All three pointed to the same answer: move the agents to the cloud, give each task its own isolated environment.<p>So we built what we wanted. The first version was pure delegation: describe a task, get back a PR. Then multiplayer, so the whole team can talk to the same agent, each in their own thread. Then memory, so &quot;use the existing logger in lib&#x2F;log.ts, never console.log&quot; becomes a standing instruction on every future task. Then automation: crons for recurring work, event triggers for things like broken CI.<p>This space is crowded. AI labs ship their own coding products (Claude Code, Codex), local IDEs wrap models in your editor, and a wave of startups build custom cloud agents on bespoke harnesses. We take the following path: reuse the lab-native CLIs in cloud sandboxes. Labs will keep pouring RL into their own harnesses, so they only get better over time. That way, no vendor lock-in, and you can pick a different CLI per task or combine them.<p>When you give Twill a task, it spins up a dedicated sandbox, clones your repo, installs dependencies, and invokes the CLI you chose. Each task gets its own filesystem, ports, and process isolation. Secrets are injected at runtime through environment variables. After a task finishes, Twill snapshots the sandbox filesystem so the next run on the same repo starts warm with dependencies already installed. We chose this architecture because every time the labs ship an improvement to their coding harness, Twill picks up the improvement automatically.<p>We’re also open-sourcing agentbox-sdk, <a href="https:&#x2F;&#x2F;github.com&#x2F;TwillAI&#x2F;agentbox-sdk" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;TwillAI&#x2F;agentbox-sdk</a>, an SDK for running and interacting with agent CLIs across sandbox providers.<p>Here’s an example: a three-person team assigned Twill to a Linear backlog ticket about adding a CSV import feature to their Rails app. Twill cloned the repo, set up the dev environment, implemented the feature, ran the test suite, took screenshots and attached them to the PR. The PR needed one round of revision, which they requested through Github. For more complex tasks, Twill asks clarifying questions before writing code and records a browser session video (using Vercel&#x27;s Webreel) as proof of work.<p>Free tier: 10 credits per month (1 credit = $1 of AI compute at cost, no markup), no credit card. Paid plans start at $50&#x2F;month for 50 credits, with BYOK support on higher tiers. Free pro tier for open-source projects.<p>We’d love to hear how cloud coding agents fit into your workflow today, and if you try Twill, what worked, what broke, and what’s still missing.

[Other] Why I'm Building a Database Engine in C#

[Other] Show HN: Figma for Coding Agents Feels a bit like Figma, but for coding agents.<p>Instead of going back and forth with prompts, you give the agent a DESIGN.md that defines the design system up front, and it generally sticks to it when generating UI.<p>Google Stitch seems to be moving in this direction as a standard, so we put together a small collection of DESIGN.md files based on popular web sites.

[Other] Show HN: Zeroclawed: Secure Agent Gateway I’ve been cautiously (and nervously) playing with openclaw and a number of other claw and code agents for a while now, but trying out different ones was tricky so I wanted a simple way to switch out channel ownership… then I wanted more. Security is hard, and I wanted to make it easier. This is FAR from polished, and no claims that I’m a “security expert” but I tried to think and research a bit on different threat models (I think of 2 broad ones for agents, external adversaries and internal agentic failures) and try and offer best in class protection on both, while also not having any special opinion on what a good agent may look like today or in the future… this is just a gateway, and hopefully one that can work for nearly any agent now or in the future, but trying to come with batteries included for some of the more popular options today like openclaw, zeroclaw, claw-code, clause and opencode, not all there yet but contribution and critiques welcome.

[Other] CPU-Z and HWMonitor compromised <a href="https:&#x2F;&#x2F;xcancel.com&#x2F;vxunderground&#x2F;status&#x2F;2042483067655262461" rel="nofollow">https:&#x2F;&#x2F;xcancel.com&#x2F;vxunderground&#x2F;status&#x2F;2042483067655262461</a><p><a href="https:&#x2F;&#x2F;old.reddit.com&#x2F;r&#x2F;pcmasterrace&#x2F;comments&#x2F;1sh4e5l&#x2F;warning_hwmonitor_163_download_on_the_official&#x2F;" rel="nofollow">https:&#x2F;&#x2F;old.reddit.com&#x2F;r&#x2F;pcmasterrace&#x2F;comments&#x2F;1sh4e5l&#x2F;warni...</a><p><a href="https:&#x2F;&#x2F;www.bleepingcomputer.com&#x2F;news&#x2F;security&#x2F;supply-chain-attack-at-cpuid-pushes-malware-with-cpu-z-hwmonitor&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.bleepingcomputer.com&#x2F;news&#x2F;security&#x2F;supply-chain-...</a>

[Other] Show HN: A tool to manage a swarm of coding agents on Linux

[Other] We've raised $17M to build what comes after Git