The best Hacker News stories from Show from the past week
Latest posts:
Show HN: Kate's App
Caregiving is a natural, human act of compassion and caring, and most of us, at some point, will rely on someone to help us with our health care (> 70%) or be tasked with helping someone else (> 10%).<p>Kate's App is a tool to coordinate doctor contact information, prescriptions, pharmacies, appointments, notes, and other information with family and caregivers, and do it safely and privately. This is not a clinic portal, and is not associated with any insurance or medical providers.<p>The app is 95% complete, and is entirely usable as is (for any interested beta users). I intend to clean up the rest of it, and go GA within a few weeks. In the meantime, I would love to answer any questions or hear helpful critiques.<p>BTW, Show HN is the best.
Show HN: Kate's App
Caregiving is a natural, human act of compassion and caring, and most of us, at some point, will rely on someone to help us with our health care (> 70%) or be tasked with helping someone else (> 10%).<p>Kate's App is a tool to coordinate doctor contact information, prescriptions, pharmacies, appointments, notes, and other information with family and caregivers, and do it safely and privately. This is not a clinic portal, and is not associated with any insurance or medical providers.<p>The app is 95% complete, and is entirely usable as is (for any interested beta users). I intend to clean up the rest of it, and go GA within a few weeks. In the meantime, I would love to answer any questions or hear helpful critiques.<p>BTW, Show HN is the best.
Show HN: Stagehand – an open source browser automation framework powered by AI
Hi HN! I’m Anirudh — longtime lurker, first time poster, and I couldn’t be more excited to show you Stagehand.<p>Stagehand is a TypeScript project that extends Playwright with three simple AI methods — act, extract, and observe. We’d love for you to try it out using the command below:<p><pre><code> npx create-browser-app --example quickstart
</code></pre>
Here’s a sample workflow:<p><pre><code> const stagehand = new Stagehand();
await stagehand.init();
// Stagehand overrides the Playwright Page and Context classes
const { page, context } = stagehand
await page.goto("instadash.com") // Regular Playwright
// Take action on the page
await page.act({ action: "click on taqueria cazadores" })
// Extract relevant data from the page
const { price } = await page.extract({
instruction: "extract the price of the super burrito",
schema: z.object({
price: z.number()
})
})
</code></pre>
We built Stagehand because we loved building browser automations using Playwright and Selenium, but we grew frustrated at how cumbersome it is to just get started and write simple browser automations. These frameworks, while incredibly powerful, are built for QA testing and are thus notoriously prone to fail if there are minor changes in the UI or underlying DOM structure.<p>The goal of Stagehand is twofold:<p>1. Make browser automations easier to write
2. Make browser automations more resilient to DOM changes.<p>We were super energized by what we’ve been seeing with vision-based computer use agents. We think with a browser, you can provide even richer data by leveraging the information in the DOM + a11y tree in addition to what’s rendered on the page. However, we didn’t want to go so far as to build an agent, since we wanted fine-grained control over each step that an agent can take.<p>Therefore, the happy medium we built was to extend the existing powerful functionalities of Playwright with simple and extensible AI APIs that return the decision-making power back to the developer at each step.<p>Check out our docs: <a href="https://docs.stagehand.dev" rel="nofollow">https://docs.stagehand.dev</a><p>We’d love for you to join and give us feedback on Slack as well: <a href="https://stagehand.dev/slack" rel="nofollow">https://stagehand.dev/slack</a>
Show HN: Factorio Blueprint Visualizer
Hey there, I'm a big fan of the game Factorio and the beauty of factories in the game. That's why I created a website to artfully visualize Factorio blueprints a few years ago. With the new 2.0 update, a few things broke. I took the opportunity to rewrite everything from Python to JavaScript and support Factorio 2.0 and the Space Age DLC. It's now also possible to easily modify the style of the drawings. Let me know if you find any bugs or if you have ideas for features.
Show HN: Tetris in a PDF
I realized that the PDF engines of modern desktop browsers (PDFium and PDF.js) support JavaScript with enough I/O primitives to make a basic game like Tetris.<p>It was a bit tricky to find a union of features that work in both engines, but in the end it turns out that showing/hiding annotation "fields" works well to make monochrome pixels, and keyboard input can be achieved by typing in a text input box.<p>All in all it's quite janky but a nice reminder of how general purpose PDF scripting can be. The linked PDF is all ASCII so you can just open it in a text editor, or have a look at the source code here: <a href="https://github.com/ThomasRinsma/pdftris/blob/main/gengrid.py">https://github.com/ThomasRinsma/pdftris/blob/main/gengrid.py</a>
Show HN: Tetris in a PDF
I realized that the PDF engines of modern desktop browsers (PDFium and PDF.js) support JavaScript with enough I/O primitives to make a basic game like Tetris.<p>It was a bit tricky to find a union of features that work in both engines, but in the end it turns out that showing/hiding annotation "fields" works well to make monochrome pixels, and keyboard input can be achieved by typing in a text input box.<p>All in all it's quite janky but a nice reminder of how general purpose PDF scripting can be. The linked PDF is all ASCII so you can just open it in a text editor, or have a look at the source code here: <a href="https://github.com/ThomasRinsma/pdftris/blob/main/gengrid.py">https://github.com/ThomasRinsma/pdftris/blob/main/gengrid.py</a>
Show HN: Atlas of Space
Hello HN! Sharing a recent side project of mine, the Atlas of Space, that I built out to explore the Solar System.<p>As a long-time space nerd, I realized recently that I didn't have a good intuition on the scale, speed, and relative orientation of the celestial bodies around us. So over the break I built out a kind of spatial Wikipedia to click around and learn about planets, moons, asteroids, and other bodies orbiting the Sun.<p>The physics is all simulated in the browser using simple Newtonian mechanics. There's a lot left to do from here, including modeling objects in non-Keplerian orbits and replaying different spacecraft missions.<p>Hope you have fun clicking around, and curious to hear what I should improve next!
Show HN: HipScript – Run CUDA in the browser with WebAssembly and WebGPU
CUDA is NVIDIA's language for GPU programming, allowing you to mix write CPU and GPU code in C++ in one file. By chaining a few projects that compile CUDA to OpenCL, then Vulkan, then WebGPU, you can experiment with this GPGPU language on any hardware.
Show HN: Tramway SDK – An unholy union between Half-Life and Morrowind engines
Hello everyone, I would like to see if there is any interest in this little project that I have been working on for the past few years.<p>Could be relevant, seeing the direction in which the mainstream game engines are going.<p>I didn't really like any of the already existing options, so I tried to make my own and it turned out to be easier than expected.<p>It's sort of like a low-budget Unreal/Source, but with open-world streaming support and it is free and open source. Very old-school. But optimized for more modern hardware. Very fast too.<p>Still not production ready, but it seems like it is mostly working.<p>I want to finish a few larger projects with it to see what happens.<p>Btw, the name is probably temporary.
Show HN: Struggle with CSS Flexbox? This Playground Is for You
Experiment with different flex properties to understand how they affect layout. Adjust the controls below to see changes in real-time and copy the generated CSS code.
Show HN: Struggle with CSS Flexbox? This Playground Is for You
Experiment with different flex properties to understand how they affect layout. Adjust the controls below to see changes in real-time and copy the generated CSS code.
Show HN: I completed shipping my desktop app
Hi, I'm a developer and first time i shipped the real product after observing the startups and indie hackers community for years.<p>I had made so many useless apps [you should check my website <a href="https://ansh.life" rel="nofollow">https://ansh.life</a>], but this time I built a very useful product that has a number of super easy-to-use tools in one app for video, music, and photo files. Users can compress, convert, resize, and do so much more with easy-to-use tools.<p>Background: I developed a frame-by-frame video cropper to upload cropped landscape videos to Instagram Reels. However, it required FFmpeg, and as a noob video editor, I decided to incorporate more user-friendly video tools. I then introduced image and audio tools to maximize the capabilities of FFmpeg. I use my app daily, and it has surprisingly generated a few thousand dollars for me.
Show HN: Org-Supertag
Enhance org-mode tag system, borrow idea from tana.
Show HN: API Parrot – Automatically Reverse Engineer HTTP APIs
When automating business processes at work, I found it difficult and time-consuming to reverse engineer business systems' APIs. I often had to manually reverse engineer APIs using developer tools or settle for less optimal technologies such as Robotic Process Automation (RPA).<p>Often, the issue is that it can be hard to resolve all the cookies, access tokens, and other elements required to successfully execute the requests. Manually trying to resolve these dependencies using developer tools is especially challenging with multiple requests where data is stored in JavaScript objects or HTML elements.<p>To try to solve this issue, I built a tool called API Parrot that automatically identifies the data correlations between requests and builds a graphical representation of the flow to give users a better understanding. To streamline the process, I also included functionality to record requests, define your own inputs and outputs, and export the entire flow—or parts of it—as JavaScript code.<p>The application is Electron-based and currently compiled for Windows and Linux. Please try it out and give feedback!<p>Online Tutorial: A simple example of reverse engineering the USPS API is available at <a href="https://docs.apiparrot.com/docs/category/tutorial---reverse-engineering-the-usps-api" rel="nofollow">https://docs.apiparrot.com/docs/category/tutorial---reverse-...</a>
Show HN: Watch 3 AIs compete in real-time stock trading
A live dashboard where you can watch GPT-4, Claude 3, and Gemini analyze market data and make daily stock trades with real money. Each AI explains its reasoning, and you can compare their different approaches to the same data.<p>Link: <a href="https://trading.snagra.com?utm_source=hn" rel="nofollow">https://trading.snagra.com?utm_source=hn</a> (no signup required)<p>What you can try right now:
- Watch live trades from GPT-4, Claude 3, and Gemini
- Read each AI's full analysis and reasoning
- Compare their different interpretations of the same market data
- Track their real-time performance and win rates
- View historical trades and performance metrics<p>Built this over the holidays to study how different AI models approach financial decisions. Each morning at 9:30 AM EST, the AIs analyze market data and make real trades with $5 stakes.<p>Technical Implementation:
- Next.js frontend with real-time updates
- Node.js/Lambda backend for AI processing
- PostgreSQL for trade tracking
- Alpaca API for automated trading
- Consistent prompts for all models<p>Data Flow:
1. Daily market analysis (9:30 AM EST)
2. Each AI gets identical inputs:
- Financial headlines
- Market summaries
- Technical indicators
- Earnings reports
3. AIs provide:
- Stock picks with reasoning
- Entry/exit conditions
- Risk assessment
4. Automated trade execution<p>Note: This is an experiment in AI behavior, not investment advice. The goal is to study how different LLMs interpret financial data and make decisions with real consequences.<p>I'll be around to answer questions about the implementation.
Show HN: Watch 3 AIs compete in real-time stock trading
A live dashboard where you can watch GPT-4, Claude 3, and Gemini analyze market data and make daily stock trades with real money. Each AI explains its reasoning, and you can compare their different approaches to the same data.<p>Link: <a href="https://trading.snagra.com?utm_source=hn" rel="nofollow">https://trading.snagra.com?utm_source=hn</a> (no signup required)<p>What you can try right now:
- Watch live trades from GPT-4, Claude 3, and Gemini
- Read each AI's full analysis and reasoning
- Compare their different interpretations of the same market data
- Track their real-time performance and win rates
- View historical trades and performance metrics<p>Built this over the holidays to study how different AI models approach financial decisions. Each morning at 9:30 AM EST, the AIs analyze market data and make real trades with $5 stakes.<p>Technical Implementation:
- Next.js frontend with real-time updates
- Node.js/Lambda backend for AI processing
- PostgreSQL for trade tracking
- Alpaca API for automated trading
- Consistent prompts for all models<p>Data Flow:
1. Daily market analysis (9:30 AM EST)
2. Each AI gets identical inputs:
- Financial headlines
- Market summaries
- Technical indicators
- Earnings reports
3. AIs provide:
- Stock picks with reasoning
- Entry/exit conditions
- Risk assessment
4. Automated trade execution<p>Note: This is an experiment in AI behavior, not investment advice. The goal is to study how different LLMs interpret financial data and make decisions with real consequences.<p>I'll be around to answer questions about the implementation.
Show HN: Chorus, a Mac app that lets you chat with a bunch of AIs at once
There's so many cool models to try but they're all in different places. In Chorus you can chat with a bunch of models all at once, and add your own system prompts.<p>Like 4o with a CBT overview, or a succinct Claude. Excited to hear your thoughts!
Show HN: Anki AI Utils
Hi hn, I am nearly at the end of medical school so it is time I publish and "advertise" my open source scripts/apps for anki! Here's the pitch:<p><i>Anki AI Utils</i> is a suite of AI-powered tools designed to automatically improve cards you find challenging. Whether you're studying medicine, languages, or any complex subject, these tools can:<p>- <i>Explain</i> difficult concepts with clear, ChatGPT-generated explanations.<p>- <i>Illustrate</i> key ideas using Dall-E or Stable Diffusion-generated images.<p>- <i>Create mnemonics</i> tailored to your memory style, including support for the Major System.<p>- <i>Reformulate</i> poorly worded cards for clarity and better retention.<p><i>Key Features:</i><p>- <i>Adaptive Learning:</i> Uses semantic similarity to match cards with relevant examples.<p>- <i>Personalized Memory Hooks:</i> Builds on your existing mnemonics for stronger recall.<p>- <i>Automation Ready:</i> Run scripts daily to enhance cards you struggled with.<p>- <i>Universal Compatibility:</i> Works across all Anki clients (Windows, Mac, Linux, Android, iOS).<p><i>Example:</i><p>For a flashcard about febrile seizures, Anki AI Utils can:<p>- Generate a <i>Dall-E illustration</i> of a toddler holding a teacup next to a fireplace.<p>- Create <i>mnemonics</i> like "A child stumbles near the fire, dances symmetrically, has one strike, and fewer than three fires."<p>- Provide an <i>explanation</i> of why febrile seizures occur and their diagnostic criteria.<p><i>Call for Contributors:</i><p>This project is battle-tested but needs help to become a polished Anki addon. If you’re a developer or enthusiast, join us to make these tools more accessible!<p><i>Check out my other projects on GitHub:</i> [Anki AI Utils](<a href="https://github.com/thiswillbeyourgithub">https://github.com/thiswillbeyourgithub</a>)<p>Transform your Anki experience with AI—because learning should be smarter, not harder.
Show HN: Anki AI Utils
Hi hn, I am nearly at the end of medical school so it is time I publish and "advertise" my open source scripts/apps for anki! Here's the pitch:<p><i>Anki AI Utils</i> is a suite of AI-powered tools designed to automatically improve cards you find challenging. Whether you're studying medicine, languages, or any complex subject, these tools can:<p>- <i>Explain</i> difficult concepts with clear, ChatGPT-generated explanations.<p>- <i>Illustrate</i> key ideas using Dall-E or Stable Diffusion-generated images.<p>- <i>Create mnemonics</i> tailored to your memory style, including support for the Major System.<p>- <i>Reformulate</i> poorly worded cards for clarity and better retention.<p><i>Key Features:</i><p>- <i>Adaptive Learning:</i> Uses semantic similarity to match cards with relevant examples.<p>- <i>Personalized Memory Hooks:</i> Builds on your existing mnemonics for stronger recall.<p>- <i>Automation Ready:</i> Run scripts daily to enhance cards you struggled with.<p>- <i>Universal Compatibility:</i> Works across all Anki clients (Windows, Mac, Linux, Android, iOS).<p><i>Example:</i><p>For a flashcard about febrile seizures, Anki AI Utils can:<p>- Generate a <i>Dall-E illustration</i> of a toddler holding a teacup next to a fireplace.<p>- Create <i>mnemonics</i> like "A child stumbles near the fire, dances symmetrically, has one strike, and fewer than three fires."<p>- Provide an <i>explanation</i> of why febrile seizures occur and their diagnostic criteria.<p><i>Call for Contributors:</i><p>This project is battle-tested but needs help to become a polished Anki addon. If you’re a developer or enthusiast, join us to make these tools more accessible!<p><i>Check out my other projects on GitHub:</i> [Anki AI Utils](<a href="https://github.com/thiswillbeyourgithub">https://github.com/thiswillbeyourgithub</a>)<p>Transform your Anki experience with AI—because learning should be smarter, not harder.
Show HN: Anki AI Utils
Hi hn, I am nearly at the end of medical school so it is time I publish and "advertise" my open source scripts/apps for anki! Here's the pitch:<p><i>Anki AI Utils</i> is a suite of AI-powered tools designed to automatically improve cards you find challenging. Whether you're studying medicine, languages, or any complex subject, these tools can:<p>- <i>Explain</i> difficult concepts with clear, ChatGPT-generated explanations.<p>- <i>Illustrate</i> key ideas using Dall-E or Stable Diffusion-generated images.<p>- <i>Create mnemonics</i> tailored to your memory style, including support for the Major System.<p>- <i>Reformulate</i> poorly worded cards for clarity and better retention.<p><i>Key Features:</i><p>- <i>Adaptive Learning:</i> Uses semantic similarity to match cards with relevant examples.<p>- <i>Personalized Memory Hooks:</i> Builds on your existing mnemonics for stronger recall.<p>- <i>Automation Ready:</i> Run scripts daily to enhance cards you struggled with.<p>- <i>Universal Compatibility:</i> Works across all Anki clients (Windows, Mac, Linux, Android, iOS).<p><i>Example:</i><p>For a flashcard about febrile seizures, Anki AI Utils can:<p>- Generate a <i>Dall-E illustration</i> of a toddler holding a teacup next to a fireplace.<p>- Create <i>mnemonics</i> like "A child stumbles near the fire, dances symmetrically, has one strike, and fewer than three fires."<p>- Provide an <i>explanation</i> of why febrile seizures occur and their diagnostic criteria.<p><i>Call for Contributors:</i><p>This project is battle-tested but needs help to become a polished Anki addon. If you’re a developer or enthusiast, join us to make these tools more accessible!<p><i>Check out my other projects on GitHub:</i> [Anki AI Utils](<a href="https://github.com/thiswillbeyourgithub">https://github.com/thiswillbeyourgithub</a>)<p>Transform your Anki experience with AI—because learning should be smarter, not harder.