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Showing 1181–1200 of 1489 tools from Hacker News
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January 20, 2026 at 04:00 AM
Poltergeist: File watcher with auto-rebuild for any language or build system
Hacker News (score: 14)[Other] Poltergeist: File watcher with auto-rebuild for any language or build system
Show HN: Stagewise (YC S25) – Front end coding agent for existing codebases
Hacker News (score: 18)[Other] Show HN: Stagewise (YC S25) – Front end coding agent for existing codebases Hey HN, we're Julian and Glenn, and we're building stagewise (<a href="https://stagewise.io">https://stagewise.io</a>), a frontend coding agent that lives inside your browser on localhost and operates on local codebases.<p>You can spawn the agent into locally running web apps in dev mode with `npx stagewise` from the project root. The agent lets you then click on HTML Elements in your app, enter prompts like 'increase the height here' and will implement the changes in your source code.<p>Before stagewise, we were building a vertical SaaS for logistics from scratch and loved using prototyping tools like v0 or lovable to get to the first version. But when switching from v0/ lovable to Cursor for local development, we felt like the frontend magic was gone. So, we decided to build stagewise to bring that same magic to local development.<p>The first version of stagewise just forwarded a prompt with browser context to existing IDEs and agents (Cursor, Cline, ..) and went viral on X after we open sourced it. However, the APIs of existing coding agents were very limiting, so we figured that building our own agent would unlock the full potential of stagewise.<p>Here's how it works: When you run `npx stagewise`, our cli proxies your running web application in dev mode and injects a toolbar containing the coding agent on top of it. Each prompt you send will be enriched with browser context and sent to our cli, which will call our backend and modify the source code of your local codebase accordingly.<p>Here's a demo of our agent changing the login UI of Cal.com, a popular open-source meeting scheduling app: <a href="https://www.youtube.com/watch?v=BkDcAozK9L4" rel="nofollow">https://www.youtube.com/watch?v=BkDcAozK9L4</a>.<p>So far, we've seen great adoption from non-technical users who wanted to continue building their lovable prototype locally. We personally use the agent almost daily to make changes to our landing page and to build the UI of new features on our console (<a href="https://console.stagewise.io">https://console.stagewise.io</a>).<p>If you have an app running in dev mode, simply `cd` into the app directory and run `npx stagewise` - the agent should appear, ready to play with.<p>We're very excited to hear your feedback!
[Other] Show HN: Embeddable -build interactive experiences you can drop into any website Hi HN, I’m a co‑founder of Embeddable AI.<p>After struggling to add interactive AI experiences to Wix, Shopify, Webflow, WordPress sites, I built this tool to let marketers build chatbots, quizzes or assistants and embed them anywhere with a snippet.<p>Built in React/TypeScript front end and Node.js logic engine. It loads fast and works across CMS platforms.<p>I’d love feedback from builders and marketers on use cases, missing features, or integration ideas.
Show HN: Dataset Explorer – Free tool to search any public datasets
Show HN (score: 6)[Other] Show HN: Dataset Explorer – Free tool to search any public datasets Dataset Explorer is now LIVE and FREE.<p>--<p>Finding the right dataset shouldn't be this hard.<p>Millions of high-quality datasets exist across Kaggle, data.gov, and other platforms, but discovering the ones you actually need feels like searching for a needle in a haystack.<p>Whether it's seasonality trends, weather patterns, holiday data, tech layoffs, currency rates, political content, or geo information – the perfect dataset is out there, but buried under poor search functionality.<p>That's why we built the dataset-explorer – a completely free tool that lets you search for datasets using natural language across multiple platforms.<p>Just describe what you want to analyze, and it uses Perplexity, scraping (Firecrawl), and other tools behind the scenes to surface relevant datasets.<p>Instead of manually browsing through categories or dealing with limited search filters, you can simply ask "show me tech layoff data from the past 5 years" and get preview of multiple datasets.<p>Quick demo: I analyzed tech layoffs from 2020-2025 and uncovered some striking insights:<p>- 2023 was brutal – 264K layoffs (the peak year)<p>- Post-IPO companies led the cuts – responsible for 58% of all layoffs<p>- Hardware hit hardest – with Intel leading the charge<p>- January 2023 = worst month ever – 89K people lost their jobs in just 30 days<p>Once you find your dataset, you can analyze it completely free on Hunch . Try it yourself and let us know we can improve it for you.<p>Data explorer - <a href="https://hunch.dev/data-explorer" rel="nofollow">https://hunch.dev/data-explorer</a><p>Demo link - <a href="https://screen.studio/share/bLnYXAvZ" rel="nofollow">https://screen.studio/share/bLnYXAvZ</a>
Show HN: Using DSPy to enrich a dataset of the Nobel laureate network
Show HN (score: 7)[Other] Show HN: Using DSPy to enrich a dataset of the Nobel laureate network I've been working a fair bit with DSPy lately, and I did some work in combining the benefits of vector search and LLMs (via a DSPy pipeline) to disambiguate records with a high degree of accuracy to help enrich a dataset. The blog post shows how this approach scales well, is very cost-effective and super concise - all it takes is < 100 lines of DSPy code and it all runs async.<p>The code to reproduce is in this repo if anyone's interested (all tools are 100% free and open source, and the methodology will work with open weight LLMs too). <a href="https://github.com/kuzudb/dspy-kuzu-demo" rel="nofollow">https://github.com/kuzudb/dspy-kuzu-demo</a>
Show HN: I've been building an ERP for manufacturing for the last 3 years
Hacker News (score: 25)[Other] Show HN: I've been building an ERP for manufacturing for the last 3 years
How we enforce .NET coding standards to improve productivity
Hacker News (score: 36)[Other] How we enforce .NET coding standards to improve productivity
A robust, open-source framework for Spiking Neural Networks on low-end FPGAs
Hacker News (score: 11)[Other] A robust, open-source framework for Spiking Neural Networks on low-end FPGAs
Show HN: FFlags – Feature flags as code, served from the edge
Show HN (score: 5)[Other] Show HN: FFlags – Feature flags as code, served from the edge Hi HN,<p>I'm the creator of FFlags. I built this because I wanted a feature flagging system that gave me the performance and reliability of an enterprise-scale solution without the months of dev time or the vendor lock-in.<p>The core ideas are:<p>1. Feature Flags as Code: You define your flag logic in TypeScript. This lets you write complex rules, which felt more natural as a developer myself than using a complex UI for logic.<p>2. Open Standard: The platform is built on the OpenFeature standard (specifically the Remote Evaluation Protocol). The goal is to avoid vendor lock-in and the usual enterprise slop. You're not tied to my platform if you want to move.<p>3. Performance: It uses an edge network to serve the flags, which keeps the wall-time latency low (sub-25ms) for globally distributed applications.<p>I was trying to avoid the heavy cost and complexity of existing enterprise tools while still getting better performance than a simple self-hosted solution.<p>There's a generous free tier ($39 per million requests after that, with no flag/user limits). I'm looking for feedback on the developer experience, the "flags-as-code" approach, and any technical questions you might have.<p>Thanks for taking a look.
Hopfield Networks Is All You Need (2020)
Hacker News (score: 30)[Other] Hopfield Networks Is All You Need (2020) <a href="https://github.com/ml-jku/hopfield-layers" rel="nofollow">https://github.com/ml-jku/hopfield-layers</a>
Show HN: Kimu – Open-Source Video Editor
Show HN (score: 53)[Other] Show HN: Kimu – Open-Source Video Editor I wanted a proper non-linear video editor built for the web. It always annoyed me how there are practically zero functioning web video editors. And here we are :)<p>Kimu can: - Work with Video, Audio & Text. - Supports Transitions. - Non-Linear Video Editing with z-axis overlays. - Split/trim - Export - A cute AI agent (coming soon!)<p>I'm in uni and I started this project out of sheer annoyance that there are zero good web video editors. It is open-source here (<a href="https://github.com/robinroy03/videoeditor" rel="nofollow">https://github.com/robinroy03/videoeditor</a>).<p>What do y'all think?
Show HN: Sidequest.js – Background jobs for Node.js using your database
Hacker News (score: 13)[Other] Show HN: Sidequest.js – Background jobs for Node.js using your database Hey HN,<p>I'm the maintainer of node-cron (5M+ downloads/month), and I recently built Sidequest.js, a background job runner for Node.js inspired by Oban (Elixir) and Sidekiq (Rails).<p>It solves some common problems I saw with libraries like node-cron:<p>- Jobs don’t block your API: they run in isolated worker threads<p>- No Redis or vendor lock-in: use Postgres, MySQL, SQLite, or MongoDB<p>- Supports retries, uniqueness, concurrency, snoozing, prioritization<p>- Comes with a CLI and a simple dashboard<p>- Works great in monoliths and doesn’t require extra infra<p>Quick start (no signup needed): <a href="https://docs.sidequestjs.com/quick-start" rel="nofollow">https://docs.sidequestjs.com/quick-start</a><p>GitHub: <a href="https://github.com/sidequestjs/sidequest" rel="nofollow">https://github.com/sidequestjs/sidequest</a><p>Would love feedback or feature suggestions. Happy to answer any questions here!
ScreenCoder: An intelligent UI-to-code generation system
Hacker News (score: 15)[Other] ScreenCoder: An intelligent UI-to-code generation system
Show HN: Structured Cooperation – A new way of building distributed apps & POC
Show HN (score: 10)[Other] Show HN: Structured Cooperation – A new way of building distributed apps & POC Hey HN,<p>I wanted to share something I've been working on for the past couple of months, which may be interesting to developers interacting with distributed architectures (e.g., microservices).<p>I'm a backend developer, and in my 9-5 job last year, we started building a distributed app - by that, I mean two or more services communicating via some sort of messaging system, like Kafka. This was my first foray into distributed systems. Having been exposed to structured concurrency by Nathan J. Smith's beautiful article on the subject (<a href="https://vorpus.org/blog/notes-on-structured-concurrency-or-go-statement-considered-harmful" rel="nofollow">https://vorpus.org/blog/notes-on-structured-concurrency-or-g...</a>), I started noticing the similarities between the challenges of this message-based communication, and that of concurrent programming, and GOTO-based programming before that - actions at a distance, non-trivial tracing of failures, synchronization issues, etc. I started suspecting that if the symptoms were similar, maybe the root cause, and therefore the solution, could be as well.<p>This led me to design something I'm calling "structured cooperation", which is basically what you get when you apply the principles of structured concurrency to distributed systems. It's something like a "protocol", in the sense that it's basically a set of rules, and not tied to any particular language or framework. As it turns out, obeying those rules has some pretty powerful consequences, including:<p>- Pretty much eliminates race conditions caused by eventual consistency<p>- Allows you to recover something resembling distributed exceptions - stack traces and the equivalent of stack unwinding, but across service boundaries<p>- Makes it much easier to reason about the system as a whole<p>I put together three articles that explain:<p>1) what structured cooperation is (<a href="https://developer.porn/posts/introducing-structured-cooperation/" rel="nofollow">https://developer.porn/posts/introducing-structured-cooperat...</a>),<p>2) one way you could implement it (<a href="https://developer.porn/posts/implementing-structured-cooperation/" rel="nofollow">https://developer.porn/posts/implementing-structured-coopera...</a>), and<p>3) why it works (<a href="https://developer.porn/posts/framing-structured-cooperation/" rel="nofollow">https://developer.porn/posts/framing-structured-cooperation/</a>).<p>I also put together a heavily documented POC implementation in Kotlin, called Scoop (linked in the title). I guess you could call it an orchestration library, similar to e.g. Temporal (<a href="https://temporal.io/" rel="nofollow">https://temporal.io/</a>), although I want to stress that it's just a POC, and not meant for production use.<p>I was hoping to bounce this idea off the community and see what people think. If it turns out to be a useful way of doing things, I'd try and drive the implementation of something similar in existing libraries (e.g. the aforementioned Temporal, Axon (<a href="https://www.axoniq.io/products/axon-framework" rel="nofollow">https://www.axoniq.io/products/axon-framework</a>), etc. - let me know if you know of others where this would make sense). As I mention in the articles, due to the heterogeneous nature of the technological landscape, I'm not sure it's a good idea to actually try to build a library, in the same way as it wouldn't make sense to do a "structured concurrency library", since there are many ways that "concurrency" is implemented. Rather, I tried to build something like a "reference implementation" that other people can use as a stepping stone to build their own implementations.<p>Above and beyond that, I think that this has educational value as well, and I did my best to make everything as understandable as possible. Some things I think are interesting:<p>- Implementation of distributed coroutines on top of Postgres<p>- Has both reactive and blocking implementation, so can be used as a learning resource for people new to reactive<p>- I documented various interesting issues that arise when you use Postgres as an MQ (see, in particular, <a href="https://github.com/gabrielshanahan/scoop/blob/09db323bf6c8a72ca34b50392928db13f80dcc15/src/main/resources/db/migration/V2__create_message_event_table.sql#L20">https://github.com/gabrielshanahan/scoop/blob/09db323bf6c8a7...</a> and <a href="https://github.com/gabrielshanahan/scoop/blob/09db323bf6c8a72ca34b50392928db13f80dcc15/src/main/kotlin/io/github/gabrielshanahan/scoop/blocking/coroutine/structuredcooperation/MessageEventRepository.kt#L676">https://github.com/gabrielshanahan/scoop/blob/09db323bf6c8a7...</a>)<p>Let me know what you think.
Parsing without ASTs and Optimizing with Sea of Nodes [video]
Hacker News (score: 20)[Other] Parsing without ASTs and Optimizing with Sea of Nodes [video]
Show HN: Voltpeek – Vim-inspired oscilloscope software
Show HN (score: 8)[Other] Show HN: Voltpeek – Vim-inspired oscilloscope software This is software for my headless, PC based oscilloscope, which is controlled entirely via commands similar to the Vim text editor. I built this because I liked the idea of headless oscilloscopes; I always have my laptop around when I’m working on electronics anyway, and it’s very convenient to save images of captured waveforms. However, I found the software for off the shelf models to be annoying and cumbersome to work with. In my experience, this holds true both when opening the software and connecting to an attached oscilloscope, and when adjusting the scope settings using menus and buttons. I have also built my own oscilloscope hardware for use with Voltpeek. The specs are nothing to write home about (7.5MHz BW, 62.5MS/s), but they should be adequate for some basic debugging and measurement tasks.
Show HN: Mathpad – Physical keypad for typing math symbols
Show HN (score: 32)[Other] Show HN: Mathpad – Physical keypad for typing math symbols Here's something different than your usual fare: A physical keypad that lets you directly type math!<p>Ever tried typing mathematical equations in your code IDE, email, or on Slack? You might know it can be tricky. Mathpad solves this with dedicated keys for Greek letters, calculus symbols, and more. Press the ∫ key and get ∫, in any application that accepts text. It uses Unicode composition, so it works everywhere: Browsers, chat apps, code editors, Word, you name it. Basically, anywhere you can type text, Mathpad lets you type mathematics.<p>I built Mathpad after getting frustrated with the friction of typing equations in e.g. Word, and what a pain in the ass it was to find the specific symbols I needed. I assumed that a product like Mathpad already existed, but that was not true and I had to build it myself.<p>It turned out to be pretty useful! Three years of solo development later, I'm launching on Crowd Supply. One of the trickiest parts of this project was finding someone who could manufacture custom keycaps with mathematical symbols. Shoutout to Loic at 3dkeycap.com for making it possible!<p>Fully open source (hardware + software): <a href="https://github.com/Summa-Cogni/Mathpad">https://github.com/Summa-Cogni/Mathpad</a> Campaign: <a href="https://www.crowdsupply.com/summa-cogni/mathpad" rel="nofollow">https://www.crowdsupply.com/summa-cogni/mathpad</a> Project log: <a href="https://hackaday.io/project/186205-mathpad-the-math-keypad" rel="nofollow">https://hackaday.io/project/186205-mathpad-the-math-keypad</a>
Browser extension and local backend that automatically archives YouTube videos
Hacker News (score: 56)[Other] Browser extension and local backend that automatically archives YouTube videos
VSCode extension for syntax highlighting multi-line YAML strings
Hacker News (score: 17)[IDE/Editor] VSCode extension for syntax highlighting multi-line YAML strings
Unikernel Guide: Build and Deploy Lightweight, Secure Apps
Hacker News (score: 18)[Other] Unikernel Guide: Build and Deploy Lightweight, Secure Apps