The best Hacker News stories from Show from the past day
Latest posts:
Show HN: Tacopy – Tail Call Optimization for Python
Show HN: Kraa – Writing App for Everything
Hello HN! We're a team of three building a new kind of web-based markdown editor.<p>There are many editors out there, so one is spoiled for choice, but Kraa's approach is a little different. It's trying to be both a minimal and distraction-free experience while being feature-rich and allowing for tons of use cases.<p>What Kraa's good for:<p>- Distraction-free writing & reading (minimal UI, performant, styling logic completely separated from the editing experience)<p>- Quick sharing of any written text – compared to many other writing tools, your content can be easily shared just by posting a link and giving 'read' or 'edit' access (we also have password-protection)<p>- Real-time chat / communities – Kraa has some unique features around real-time editing and our Chat widget allows for a frictionless chat experience. No send button.<p>- Kraa works well on mobile (though dedicated apps are planned)<p>---<p>Demo examples (all live, no login needed):<p>Blog article: <a href="https://kraa.io/kraa/examples/echolibrary" rel="nofollow">https://kraa.io/kraa/examples/echolibrary</a><p>Long-form story: <a href="https://kraa.io/kraa/examples/insidekick" rel="nofollow">https://kraa.io/kraa/examples/insidekick</a><p>Magazine: <a href="https://kraa.io/weeklyinspiration" rel="nofollow">https://kraa.io/weeklyinspiration</a><p>Kraa is built on top of ProseMirror (and TipTap) and Svelte.<p>You don’t need an account to try Kraa. We’d really appreciate your thoughts and feedback!
Show HN: Kraa – Writing App for Everything
Hello HN! We're a team of three building a new kind of web-based markdown editor.<p>There are many editors out there, so one is spoiled for choice, but Kraa's approach is a little different. It's trying to be both a minimal and distraction-free experience while being feature-rich and allowing for tons of use cases.<p>What Kraa's good for:<p>- Distraction-free writing & reading (minimal UI, performant, styling logic completely separated from the editing experience)<p>- Quick sharing of any written text – compared to many other writing tools, your content can be easily shared just by posting a link and giving 'read' or 'edit' access (we also have password-protection)<p>- Real-time chat / communities – Kraa has some unique features around real-time editing and our Chat widget allows for a frictionless chat experience. No send button.<p>- Kraa works well on mobile (though dedicated apps are planned)<p>---<p>Demo examples (all live, no login needed):<p>Blog article: <a href="https://kraa.io/kraa/examples/echolibrary" rel="nofollow">https://kraa.io/kraa/examples/echolibrary</a><p>Long-form story: <a href="https://kraa.io/kraa/examples/insidekick" rel="nofollow">https://kraa.io/kraa/examples/insidekick</a><p>Magazine: <a href="https://kraa.io/weeklyinspiration" rel="nofollow">https://kraa.io/weeklyinspiration</a><p>Kraa is built on top of ProseMirror (and TipTap) and Svelte.<p>You don’t need an account to try Kraa. We’d really appreciate your thoughts and feedback!
Show HN: Kraa – Writing App for Everything
Hello HN! We're a team of three building a new kind of web-based markdown editor.<p>There are many editors out there, so one is spoiled for choice, but Kraa's approach is a little different. It's trying to be both a minimal and distraction-free experience while being feature-rich and allowing for tons of use cases.<p>What Kraa's good for:<p>- Distraction-free writing & reading (minimal UI, performant, styling logic completely separated from the editing experience)<p>- Quick sharing of any written text – compared to many other writing tools, your content can be easily shared just by posting a link and giving 'read' or 'edit' access (we also have password-protection)<p>- Real-time chat / communities – Kraa has some unique features around real-time editing and our Chat widget allows for a frictionless chat experience. No send button.<p>- Kraa works well on mobile (though dedicated apps are planned)<p>---<p>Demo examples (all live, no login needed):<p>Blog article: <a href="https://kraa.io/kraa/examples/echolibrary" rel="nofollow">https://kraa.io/kraa/examples/echolibrary</a><p>Long-form story: <a href="https://kraa.io/kraa/examples/insidekick" rel="nofollow">https://kraa.io/kraa/examples/insidekick</a><p>Magazine: <a href="https://kraa.io/weeklyinspiration" rel="nofollow">https://kraa.io/weeklyinspiration</a><p>Kraa is built on top of ProseMirror (and TipTap) and Svelte.<p>You don’t need an account to try Kraa. We’d really appreciate your thoughts and feedback!
Show HN: Kraa – Writing App for Everything
Hello HN! We're a team of three building a new kind of web-based markdown editor.<p>There are many editors out there, so one is spoiled for choice, but Kraa's approach is a little different. It's trying to be both a minimal and distraction-free experience while being feature-rich and allowing for tons of use cases.<p>What Kraa's good for:<p>- Distraction-free writing & reading (minimal UI, performant, styling logic completely separated from the editing experience)<p>- Quick sharing of any written text – compared to many other writing tools, your content can be easily shared just by posting a link and giving 'read' or 'edit' access (we also have password-protection)<p>- Real-time chat / communities – Kraa has some unique features around real-time editing and our Chat widget allows for a frictionless chat experience. No send button.<p>- Kraa works well on mobile (though dedicated apps are planned)<p>---<p>Demo examples (all live, no login needed):<p>Blog article: <a href="https://kraa.io/kraa/examples/echolibrary" rel="nofollow">https://kraa.io/kraa/examples/echolibrary</a><p>Long-form story: <a href="https://kraa.io/kraa/examples/insidekick" rel="nofollow">https://kraa.io/kraa/examples/insidekick</a><p>Magazine: <a href="https://kraa.io/weeklyinspiration" rel="nofollow">https://kraa.io/weeklyinspiration</a><p>Kraa is built on top of ProseMirror (and TipTap) and Svelte.<p>You don’t need an account to try Kraa. We’d really appreciate your thoughts and feedback!
Show HN: HCB Mobile – financial app built by 17 y/o, processing $6M/month
Hey everyone! I just built a mobile app using Expo (React Native) for a platform that moves $6M/month. It’s a neobank used by 6,500+ nonprofit organizations across the world.<p>One of my biggest challenges, while juggling being a full-time student, was getting permission from Apple/Google to use advanced native features such as Tap to Pay (for in-person donations) and Push Provisioning (for adding your card to your digital wallet). It was months of back-and-forth emails, test case recordings, and also compliance checks.<p>Even after securing Apple/Google’s permission, any minor fix required publishing a new build, which was time-consuming. After dealing with this for a while, I adopted the idea of “over the air updates” using Expo’s EAS update service. This allowed me to remotely trigger updates without needing a new app build.<p>The 250 hours I spent building this app were an INSANE learning experience, but it was also a whole lot of fun. Give the app a try, and I’d love any feedback you have on it!<p>btw, back in March, we open-sourced this nonprofit neobank on GitHub.
<a href="https://news.ycombinator.com/item?id=43519802">https://news.ycombinator.com/item?id=43519802</a>
Show HN: HCB Mobile – financial app built by 17 y/o, processing $6M/month
Hey everyone! I just built a mobile app using Expo (React Native) for a platform that moves $6M/month. It’s a neobank used by 6,500+ nonprofit organizations across the world.<p>One of my biggest challenges, while juggling being a full-time student, was getting permission from Apple/Google to use advanced native features such as Tap to Pay (for in-person donations) and Push Provisioning (for adding your card to your digital wallet). It was months of back-and-forth emails, test case recordings, and also compliance checks.<p>Even after securing Apple/Google’s permission, any minor fix required publishing a new build, which was time-consuming. After dealing with this for a while, I adopted the idea of “over the air updates” using Expo’s EAS update service. This allowed me to remotely trigger updates without needing a new app build.<p>The 250 hours I spent building this app were an INSANE learning experience, but it was also a whole lot of fun. Give the app a try, and I’d love any feedback you have on it!<p>btw, back in March, we open-sourced this nonprofit neobank on GitHub.
<a href="https://news.ycombinator.com/item?id=43519802">https://news.ycombinator.com/item?id=43519802</a>
Show HN: HCB Mobile – financial app built by 17 y/o, processing $6M/month
Hey everyone! I just built a mobile app using Expo (React Native) for a platform that moves $6M/month. It’s a neobank used by 6,500+ nonprofit organizations across the world.<p>One of my biggest challenges, while juggling being a full-time student, was getting permission from Apple/Google to use advanced native features such as Tap to Pay (for in-person donations) and Push Provisioning (for adding your card to your digital wallet). It was months of back-and-forth emails, test case recordings, and also compliance checks.<p>Even after securing Apple/Google’s permission, any minor fix required publishing a new build, which was time-consuming. After dealing with this for a while, I adopted the idea of “over the air updates” using Expo’s EAS update service. This allowed me to remotely trigger updates without needing a new app build.<p>The 250 hours I spent building this app were an INSANE learning experience, but it was also a whole lot of fun. Give the app a try, and I’d love any feedback you have on it!<p>btw, back in March, we open-sourced this nonprofit neobank on GitHub.
<a href="https://news.ycombinator.com/item?id=43519802">https://news.ycombinator.com/item?id=43519802</a>
Show HN: Chess on a Donut/Torus and Deep-Dive
Hey there! I just finished a youtube video explaining our donut chess in detail: <a href="https://youtu.be/iRcfHCPFgkM" rel="nofollow">https://youtu.be/iRcfHCPFgkM</a><p>So I thought it'd be cool to show it off here too- it can be played around with at mchess.io/donut - you can also set up an AI or online game on the site.<p>This is all indie dev work from a couple friends and myself.
Show HN: RAG in 3 Lines of Python
Got tired of wiring up vector stores, embedding models, and chunking logic every time I needed RAG. So I built piragi.<p><pre><code> from piragi import Ragi
kb = Ragi(\["./docs", "./code/\*\*/\*.py", "https://api.example.com/docs"\])
answer = kb.ask("How do I deploy this?")
</code></pre>
That's the entire setup. No API keys required - runs on Ollama + sentence-transformers locally.<p>What it does:<p><pre><code> - All formats - PDF, Word, Excel, Markdown, code, URLs, images, audio
- Auto-updates - watches sources, refreshes in background, zero query latency
- Citations - every answer includes sources
- Advanced retrieval - HyDE, hybrid search (BM25 + vector), cross-encoder reranking
- Smart chunking - semantic, contextual, hierarchical strategies
- OpenAI compatible - swap in GPT/Claude whenever you want
</code></pre>
Quick examples:<p><pre><code> # Filter by metadata
answer = kb.filter(file_type="pdf").ask("What's in the contracts?")
#Enable advanced retrieval
kb = Ragi("./docs", config={
"retrieval": {
"use_hyde": True,
"use_hybrid_search": True,
"use_cross_encoder": True
}
})
# Use OpenAI instead
kb = Ragi("./docs", config={"llm": {"model": "gpt-4o-mini", "api_key": "sk-..."}})
</code></pre>
Install:<p><pre><code> pip install piragi
PyPI: https://pypi.org/project/piragi/
</code></pre>
Would love feedback. What's missing? What would make this actually useful for your projects?
Show HN: A Minimal Monthly Task Planner (printable, offline, no signup)
Hi HN,<p>I built a tiny tool because I couldn’t find a clean, distraction-free monthly planner that:<p>1. shows a clean monthly task view
2. doesn’t require an account
3. doesn’t sync or store anything online
4. works offline
5. is printable
6. and keeps a minimal, distraction-free aesthetic<p>So I made <a href="https://printcalendar.top/" rel="nofollow">https://printcalendar.top/</a>
— a minimal monthly task planner.<p>It’s intentionally simple. No logins, no integrations, no dashboards.
Just a small tool for people who want structure without clutter.
Show HN: A Minimal Monthly Task Planner (printable, offline, no signup)
Hi HN,<p>I built a tiny tool because I couldn’t find a clean, distraction-free monthly planner that:<p>1. shows a clean monthly task view
2. doesn’t require an account
3. doesn’t sync or store anything online
4. works offline
5. is printable
6. and keeps a minimal, distraction-free aesthetic<p>So I made <a href="https://printcalendar.top/" rel="nofollow">https://printcalendar.top/</a>
— a minimal monthly task planner.<p>It’s intentionally simple. No logins, no integrations, no dashboards.
Just a small tool for people who want structure without clutter.
Show HN: MTXT – Music Text Format
Show HN: MTXT – Music Text Format
Show HN: MTXT – Music Text Format
Show HN: Walrus – a Kafka alternative written in Rust
Show HN: Walrus – a Kafka alternative written in Rust
Show HN: Walrus – a Kafka alternative written in Rust
Show HN: Onlyrecipe 2.0 – I added all features HN requested – 4 years later
Show HN: Onlyrecipe 2.0 – I added all features HN requested – 4 years later