🛠️ All DevTools

[Other] The go-to web for your AI coding agent — local-first search, fetch, crawl & research over MCP. No API keys, no cloud, $0/query. Public beta.

[Package Manager] Moonstone: Modern, cross-platform Lua runtime and package manager written in Zig

[Other] Stenchill: 3D Printable Solder Paste Stencil Generator

[Other] Topcoat: The full full-stack framework for Rust

[Other] Show HN: Fluent, tiny lang for reactivity and autograd After six months of work, I am here again presenting Fluent – a tiny lang which is optimized for differentiable &amp; reactive programming.<p>Since I am not Conal Elliot, don&#x27;t expect a beautiful theoretical unification of FRP and AD from first principles. Rather, a horrific monster that holds together mostly because a lot of duct-tape.<p>The link points to the semi-interactive tour of the language, which will get the job done much better than I could in here.<p>Hope you hate&#x2F;like it!

[DevOps] Show HN: Docket (system for active note-taking) now self-hosted after HN asked 6 months ago [0] I did a Show HN for Docket - it’s a system for active note taking in regular meetings like 1-1s, stands, all-hands, etc. On that thread a few of you asked for a self-hosted version. So I built it.<p>There&#x27;s a free tier available. I put loads of effort into making setup easy - just one install command that gives you a CLI for start&#x2F;stop&#x2F;upgrade commands etc.<p>It runs as a single container, you can use a custom domain out the box for hosting over the internet (it provisions a LetsEncrypt cert for you), or just run locally (then via tailscale or whatever else if you want private networking). Single-player mode for private note-taking is indeed a much-encouraged usecase and is unlimited within the free tier.<p>This release also includes other big improvements requested in feedback last time (in both the self hosted and cloud versions): Export of notes; editor formatting more intuitive; easier to manage your actions.<p>Next on the roadmap is native clients, but honestly the mobile web experience is already quite usable. I use it all the time on my phone!<p>Give it a go, and let me know what you think :-) Any help needed with setup or anything else really, contact details are in my profile.<p>[0] <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46198430">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=46198430</a>

[Other] Show HN: A zoomable timeline of 4M Wikipedia events I&#x27;m building a journal app in Kotlin Multiplatform and for this purpose I have created a zoomable timeline interface.<p>This is a side-project where I reuse the timeline interface to display 4 million events imported from Wikipedia &#x2F; Wikidata, scored using PageRank. There is more information on the about page.<p>If you&#x27;re interested in the stack: I use Kotlin Multiplatform extensively, with Compose Multiplatform for the UI, communicates with the backend using Kotlinx-RPC and behind the hood a simple Postgres database on a Hetzner machine.

[Other] Homomorphically encrypted CIFAR-10 inference in 200ms

[Other] VulnHunter: Capital One's agentic AI code security tool

[Other] Local-first code intelligence graph for MCP and CLI. Builds a persistent map of your codebase so AI coding tools read only what matters, with benchmarked context reductions on reviews and large-repo workflows.

[Other] In-toto: A framework to secure the integrity of software supply chains

[Other] Show HN: Mojibake – a low-level Unicode library written in C I&#x27;ve written Mojibake because I don&#x27;t like the other Unicode libraries for Unicode support.<p>It consists of only two amalgamation files: mojibake.h and mojibake.c. I&#x27;ve added all the most important Unicode algorithms, such as normalization, case conversion, segmentation, bidirectional text, collation, confusable, and others.<p>I regularly test it in these OSes: Linux, macOS, FreeBSD, OpenBSD, NetBSD, and Windows 11.<p>You can find a WASM demo on that site of all the public API functions and the documentation. If you want to participate, feel free to do it. Any kind of help is welcome. Check the CONTRIBUTING.md and API.md files in the GitHub repository for instructions on how to do it.

[Other] CVE-2026-25089: FortiSandbox unauthenticated command injection added to CISA KEV

[Other] Show HN: Vektorgeist- A platform for AI operators and their agent's VektorGeist is a platform designed for AI operators to discover, share, and distribute AI resources in one place. The platform brings together: AI tools MCP servers Prompts Workflows Templates Agents Technical articles A community for collaboration Recent updates include selectable layouts, customizable themes, an immersive interface, community profiles, and a marketplace for sharing projects and resources. The goal is to create a central hub where AI operators can find practical resources, contribute their own work, and collaborate with others without having to search across dozens of different platforms. Feedback is welcome, especially on: Overall user experience Features that would improve the platform Missing functionality Ideas for making it more useful for AI operators Website: <a href="https:&#x2F;&#x2F;vektorgeist.com" rel="nofollow">https:&#x2F;&#x2F;vektorgeist.com</a> Discord:<a href="https:&#x2F;&#x2F;discord.gg&#x2F;EEsMTJ73m" rel="nofollow">https:&#x2F;&#x2F;discord.gg&#x2F;EEsMTJ73m</a>

[Other] Mathematics of Data Science

[Testing] Show HN: Libretto PR agents – Automatically fix failing playwright scripts Libretto PR agents is a free TypeScript library for maintaining Playwright browser automations. Add one line of code to your existing Playwright scripts and it lets an agent automatically open GitHub PRs fixing the script when it fails.<p>A few months ago we released Libretto, a CLI + coding-agent skill for building deterministic browser automations. The idea was that for many browser workflows, especially repetitive business workflows, you don’t need an AI agent making decisions at runtime. You want deterministic Playwright scripts that are inspectable, faster to run, and much cheaper than repeatedly calling an AI browser agent.<p>That helped us generate Playwright and network-request-based scripts, but websites can often change which breaks deterministic scripts. So maintaining a variety of scripts at scale is a headache. If you already have a bunch of functioning Playwright scripts, the last thing you want is to rewrite everything around a new runtime AI framework like browser-use or stagehand just to make maintenance easier.<p>The Libretto PR Agent pulls your code from GitHub and connects via CDP to the browser session that just failed. It has an exec tool for injecting Playwright and javascript into the page, and once its inspected the failure, it opens a PR to your repo with a proposed code fix.<p>You use it like this:<p><pre><code> try { await automationLogic(page); } catch (error) { await playwrightDebugger.debugFailure(error, page); throw error; } </code></pre> The agent is completely free and open source, lets you bring your own LLM provider API keys, and works with any browser provider (including self hosted).<p>The source code is here: <a href="https:&#x2F;&#x2F;github.com&#x2F;saffron-health&#x2F;libretto&#x2F;tree&#x2F;main&#x2F;packages&#x2F;playwright-debugger" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;saffron-health&#x2F;libretto&#x2F;tree&#x2F;main&#x2F;package...</a><p>We think this makes browser integrations much easier to maintain, especially for teams that already have Playwright browser automation scripts in production and don’t want a full migration to get AI-assisted debugging and repair.<p>If you’re maintaining browser automations in production, would love to know what your debugging flow is currently and any feedback on this approach.

[Other] Agent-talk: Enabling coding agents to work together

[Other] Show HN: Leaves – A text-UI disk usage treemap visualizer GUI disk analyzers are great for figuring out what&#x27;s filling up your laptop&#x2F;desktop drive.<p>On containers or remote servers, the options are limited to purely text based utilities (e.g. du) or list-centric TUIs (e.g. ncdu) which are usually limited to viewing one directory at a time.<p>I created <i>leaves</i> to fill that gap.<p>Inspired by classic utilities like WinDirStat and KDirStat, it uses a 2-dimensional treemap^1 visualization to show the entire directory hierarchy with proportionally sized rectangles.<p>It&#x27;s performant enough to handle millions of files, thanks to Rust and multi-threading. However, block characters aren&#x27;t as suited as pixels for resolving a large number of items. Leaves can show file-type summaries per directory or partition the top-level directories by extension, allowing you to see not only where space is being used, but also how.<p>For instance, I can see the largest chunk of my home directory is taken up by uv caches for python and old Linux ISOs that I could easily re-download if needed. Or in a particular container, +600MB is used by standard Rust documentation and tutorials, and that it is the only location with HTML&#x2F;JS files, when only the libraries and build tools are needed (note to self: remember to use the <i>minimal</i> profile next time).<p>^1: <a href="https:&#x2F;&#x2F;github.com&#x2F;shundhammer&#x2F;qdirstat&#x2F;blob&#x2F;master&#x2F;doc&#x2F;Treemap.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;shundhammer&#x2F;qdirstat&#x2F;blob&#x2F;master&#x2F;doc&#x2F;Tree...</a>

[Other] Show HN: BambooGrid – Open-source web UI for power grid modeling and power flow Hi HN, I am co-founder of Kickstage, a software company specializing in solutions for the electrical industry and lately grid operators.<p>We are hiring engineers from different backgrounds, a lot of them software developers with limited experience in the sectors. Deep domain knowledge is key in our industry however, so we are constantly teaching the basics of power flow analysis, active vs reactive power, transmission line properties etc.<p>With Jupyter notebooks and the Python console only, that&#x27;s a tedious task and hardly ever led to a deep understanding of the topics.<p>So we built BambooGrid: a web-based editor on top of pandapower, a popular simulation library in our industry. You drag elements like buses, lines, loads generators and transformers onto a canvas, wire them up, set parameters and run power flow. It will print results directly on the canvas, color buses according to their voltages, even allows you to see an interactive admittance matrix.<p>You can try it out without installing anything on <a href="https:&#x2F;&#x2F;bamboo.kickstage.com" rel="nofollow">https:&#x2F;&#x2F;bamboo.kickstage.com</a> (thanks to our friends at Hostzero who sponsored hosting). Start with one of the included samples or draw your own. Just don&#x27;t forget to add a slack element.<p>Built on a Python backend (driven by the choice of pandapower mainly) and a React frontend. Fully MIT licensed, so feel free to use and modify to your liking. Even better: Give us feedback - we&#x27;re extremely open to suggestions how to improve the tool and are glad about every user who learns a bit more about power systems through it.<p>Šime, who built most of this, is also in the thread. We are both happy to answer anything about the implementation or power systems in general.

[API/SDK] Show HN: Open-source AI app builder you can embed into your own SaaS We just open sourced a first class our AI web app builder.<p>Instead of using another hosted AI coding platform, you can fork this project and build your own AI app builder, fully customized and running under your own brand.<p>It includes:<p>Next.js + TypeScript AI chat with streaming Artifact generation File explorer Code editor Live preview Databases Sandboxes to be used by AI agents Versions Responsive production-ready UI And a lot more...<p>The only required dependency is the Totalum API, which exposes the AI generation engine through a simple REST API. You can replace or extend the backend however you want.<p>It&#x27;s designed for developers, SaaS companies and agencies that want to:<p>Build their own AI app builder Add AI app generation to an existing product Create a white label AI builder Customize every part of the UI and workflow Self host the frontend<p>We use the same frontend in production, and decided to open source it so others don&#x27;t have to start from scratch.<p>Repository: <a href="https:&#x2F;&#x2F;github.com&#x2F;totalumlabs&#x2F;ai-app-builder-open" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;totalumlabs&#x2F;ai-app-builder-open</a><p>I&#x27;d love feedback, feature requests, or ideas from the HN community.