The best Hacker News stories from Show from the past day
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Show HN: Fast Thermodynamic Calculations in Python
I built gaspype, a Python library for fast thermodynamic calculations, like equilibrium reactions. It's lightweight, written in typed Python/Numpy, and comes with a large species database.<p>Gaspype operates on multidimensional arrays for composition, temperature and pressure. It is designed for a flat learning curve and compact syntax for pocket calculator-like use in Jupyter Notebooks, as well as high performance for integration in large physical models. One central goal is the portability to GPU frameworks like JAX or PyTorch for performance as well as direct integrability in ML pipelines.<p>Checkout the examples, I'd love to hear you feedback, use cases, or feature ideas.<p>Repo is located here: <a href="https://github.com/DLR-Institute-of-Future-Fuels/gaspype">https://github.com/DLR-Institute-of-Future-Fuels/gaspype</a>
Show HN: Fast Thermodynamic Calculations in Python
I built gaspype, a Python library for fast thermodynamic calculations, like equilibrium reactions. It's lightweight, written in typed Python/Numpy, and comes with a large species database.<p>Gaspype operates on multidimensional arrays for composition, temperature and pressure. It is designed for a flat learning curve and compact syntax for pocket calculator-like use in Jupyter Notebooks, as well as high performance for integration in large physical models. One central goal is the portability to GPU frameworks like JAX or PyTorch for performance as well as direct integrability in ML pipelines.<p>Checkout the examples, I'd love to hear you feedback, use cases, or feature ideas.<p>Repo is located here: <a href="https://github.com/DLR-Institute-of-Future-Fuels/gaspype">https://github.com/DLR-Institute-of-Future-Fuels/gaspype</a>
Show HN: A cross-platform terminal emulator written in Java
It's based on the jediterm library developed for IDEs, but it can also be put to work as a standalone terminal emulator with tabs. The library has been around for more than 10 years, but I don't think anyone made a terminal emulator app from it?
Show HN: A cross-platform terminal emulator written in Java
It's based on the jediterm library developed for IDEs, but it can also be put to work as a standalone terminal emulator with tabs. The library has been around for more than 10 years, but I don't think anyone made a terminal emulator app from it?
Show HN: A cross-platform terminal emulator written in Java
It's based on the jediterm library developed for IDEs, but it can also be put to work as a standalone terminal emulator with tabs. The library has been around for more than 10 years, but I don't think anyone made a terminal emulator app from it?
Show HN: AirBending – Hand gesture based macOS app MIDI controller
Show HN: AirBending – Hand gesture based macOS app MIDI controller
Show HN: AirBending – Hand gesture based macOS app MIDI controller
Show HN: BunkerWeb – the open-source and cloud-native WAF
Show HN: BunkerWeb – the open-source and cloud-native WAF
Show HN: BunkerWeb – the open-source and cloud-native WAF
Show HN: I AI-coded a tower defense game and documented the whole process
I'm a software developer with 20+ years of experience but during this time I never programmed any games, but I really wanted to for the longest time. With the advent of AI coding agents I thought that this is the best time to try and so I've learned a bit of Phaser.js (a Javascript based game engine) and entered Beginner's Jam Summer 2025 - a game jam for beginners in the game dev industry that allows AI coding. After around 25-30 hours (working mainly after my full-time day job) I managed to submit the game I called "Tower of Time" (the theme of the jam was "Time Travel").<p>You can play it in your browser here: <a href="https://m4v3k.itch.io/tower-of-time" rel="nofollow">https://m4v3k.itch.io/tower-of-time</a><p>The goal of this project for me was first and foremost to see if AI coding is good enough to help me with creating something that's actually fun to play and to my delight is turns out the answer is yes! I decided to document the whole process for myself and others to learn from my mistakes, so both the code AND all the prompts I used are published on GitHub (see submission link). The art assets are largely taken from itch.io artists who shared them for free, with some slight touch ups. Sounds came from freesound.org.<p>I've also streamed parts of the process, you can watch me working on the final stretch and submitting the finished game (warning, it's 5+ hours long):<p><a href="https://www.twitch.tv/videos/2503428478" rel="nofollow">https://www.twitch.tv/videos/2503428478</a><p>During this process I've learned a lot and I want to use this knowledge in my next project that will hopefully be more ambitious. If you have any comments or questions I'm here to answer!
Show HN: I AI-coded a tower defense game and documented the whole process
I'm a software developer with 20+ years of experience but during this time I never programmed any games, but I really wanted to for the longest time. With the advent of AI coding agents I thought that this is the best time to try and so I've learned a bit of Phaser.js (a Javascript based game engine) and entered Beginner's Jam Summer 2025 - a game jam for beginners in the game dev industry that allows AI coding. After around 25-30 hours (working mainly after my full-time day job) I managed to submit the game I called "Tower of Time" (the theme of the jam was "Time Travel").<p>You can play it in your browser here: <a href="https://m4v3k.itch.io/tower-of-time" rel="nofollow">https://m4v3k.itch.io/tower-of-time</a><p>The goal of this project for me was first and foremost to see if AI coding is good enough to help me with creating something that's actually fun to play and to my delight is turns out the answer is yes! I decided to document the whole process for myself and others to learn from my mistakes, so both the code AND all the prompts I used are published on GitHub (see submission link). The art assets are largely taken from itch.io artists who shared them for free, with some slight touch ups. Sounds came from freesound.org.<p>I've also streamed parts of the process, you can watch me working on the final stretch and submitting the finished game (warning, it's 5+ hours long):<p><a href="https://www.twitch.tv/videos/2503428478" rel="nofollow">https://www.twitch.tv/videos/2503428478</a><p>During this process I've learned a lot and I want to use this knowledge in my next project that will hopefully be more ambitious. If you have any comments or questions I'm here to answer!
Show HN: I AI-coded a tower defense game and documented the whole process
I'm a software developer with 20+ years of experience but during this time I never programmed any games, but I really wanted to for the longest time. With the advent of AI coding agents I thought that this is the best time to try and so I've learned a bit of Phaser.js (a Javascript based game engine) and entered Beginner's Jam Summer 2025 - a game jam for beginners in the game dev industry that allows AI coding. After around 25-30 hours (working mainly after my full-time day job) I managed to submit the game I called "Tower of Time" (the theme of the jam was "Time Travel").<p>You can play it in your browser here: <a href="https://m4v3k.itch.io/tower-of-time" rel="nofollow">https://m4v3k.itch.io/tower-of-time</a><p>The goal of this project for me was first and foremost to see if AI coding is good enough to help me with creating something that's actually fun to play and to my delight is turns out the answer is yes! I decided to document the whole process for myself and others to learn from my mistakes, so both the code AND all the prompts I used are published on GitHub (see submission link). The art assets are largely taken from itch.io artists who shared them for free, with some slight touch ups. Sounds came from freesound.org.<p>I've also streamed parts of the process, you can watch me working on the final stretch and submitting the finished game (warning, it's 5+ hours long):<p><a href="https://www.twitch.tv/videos/2503428478" rel="nofollow">https://www.twitch.tv/videos/2503428478</a><p>During this process I've learned a lot and I want to use this knowledge in my next project that will hopefully be more ambitious. If you have any comments or questions I'm here to answer!
Show HN: I rewrote my notepad calculator as a local-first app with CRDT syncing
I launched NumPad v1 on here a few years ago, and back then it wasn't much more than a thin CodeMirror wrapper around the calculator engine I'd written.<p>Now I've rewritten it as a PWA that supports multiple documents, persists them to IndexedDB, and has a syncing service for paying customers. Syncing is handled by Automerge[1] under the hood, which <i>should</i> make it relatively easy to get document sharing working too.<p>[1] <a href="https://automerge.org/" rel="nofollow">https://automerge.org/</a>
Show HN: I rewrote my notepad calculator as a local-first app with CRDT syncing
I launched NumPad v1 on here a few years ago, and back then it wasn't much more than a thin CodeMirror wrapper around the calculator engine I'd written.<p>Now I've rewritten it as a PWA that supports multiple documents, persists them to IndexedDB, and has a syncing service for paying customers. Syncing is handled by Automerge[1] under the hood, which <i>should</i> make it relatively easy to get document sharing working too.<p>[1] <a href="https://automerge.org/" rel="nofollow">https://automerge.org/</a>
Show HN: HomeBrew HN – Generate personal context for content ranking
TLDR: Build a quick HN profile to see how little context LLMs need to personalise your feed. Rate 30 posts once, get a permanent ranked homepage you can return to.<p>Our goal was to build a tool that allowed us to test a range of "personal contexts" on a very focused everyday use case for us, reading HN!<p>We are exploring use of personal context with LLMs, specifically what kind of data, how much, and with how much additional effort on the user’s part was needed to get decent results. The test tool was a bit of fun on its own so we re-skinned it and decided to post it here.<p>First time posting anything on HN but folks at work encouraged me to drop a link. Keen on feedback or other interesting projects thinking about bootstrapping personal context for LLM workflows!
Show HN: HomeBrew HN – Generate personal context for content ranking
TLDR: Build a quick HN profile to see how little context LLMs need to personalise your feed. Rate 30 posts once, get a permanent ranked homepage you can return to.<p>Our goal was to build a tool that allowed us to test a range of "personal contexts" on a very focused everyday use case for us, reading HN!<p>We are exploring use of personal context with LLMs, specifically what kind of data, how much, and with how much additional effort on the user’s part was needed to get decent results. The test tool was a bit of fun on its own so we re-skinned it and decided to post it here.<p>First time posting anything on HN but folks at work encouraged me to drop a link. Keen on feedback or other interesting projects thinking about bootstrapping personal context for LLM workflows!
Show HN: HomeBrew HN – Generate personal context for content ranking
TLDR: Build a quick HN profile to see how little context LLMs need to personalise your feed. Rate 30 posts once, get a permanent ranked homepage you can return to.<p>Our goal was to build a tool that allowed us to test a range of "personal contexts" on a very focused everyday use case for us, reading HN!<p>We are exploring use of personal context with LLMs, specifically what kind of data, how much, and with how much additional effort on the user’s part was needed to get decent results. The test tool was a bit of fun on its own so we re-skinned it and decided to post it here.<p>First time posting anything on HN but folks at work encouraged me to drop a link. Keen on feedback or other interesting projects thinking about bootstrapping personal context for LLM workflows!
Show HN: A modern C++20 AI SDK (GPT‑4o, Claude 3.5, tool‑calling)
Hi all,<p>I’m hacking on new features for the ClickHouse native client and wanted the same “just call the model” ergonomics JavaScript and Python now enjoy. It didn’t exist for modern C++, so I wrote one.<p>ai‑sdk‑cpp (Apache‑2.0) gives you:<p>- Unified calls to OpenAI (GPT‑4o) and Anthropic (Claude 3.5) with a single C++20 API.
- Streaming, multi‑turn chat, error handling—all std::optional/std::variant, no macros.
- Tool calling (function‑calling) so the model can hit real APIs; sync or async, runs in parallel.<p>The tricky bit: C++ still lacks real reflection, so mapping plain functions → JSON schemas isn’t as automatic as, say, TypeScript decorators. I’d love fresh eyes on that part. Try the examples and tell me where it feels clunky. This is inspired by Vercel's AI SDK [1], and litellm [2].<p>Repo live here: <a href="https://github.com/ClickHouse/ai-sdk-cpp">https://github.com/ClickHouse/ai-sdk-cpp</a>, feedback welcome!<p>[1] <a href="https://github.com/vercel/ai">https://github.com/vercel/ai</a>
[2] <a href="https://github.com/BerriAI/litellm">https://github.com/BerriAI/litellm</a>