Show HN: Neural Emotion Matrix for NPCs https://bit.ly/4n7FUlb

Show HN: Neural Emotion Matrix for NPCs Hey! I built this system to humanize NPCs by giving them emotions using Rust and ML. The system provides emotion coordinates (based on Russell's circumplex model) from text input or actions, with persistent emotional memory per entity. Think NPCs that remember how they feel about specific players or events. I pre-trained a DistilBERT model on ~1k video game dialogues (Skyrim, Cyberpunk, etc.) and plan to extract and evaluate 100k+ dialogues soon. However studio/team can manually add dialogues to enrich their own dataset. The matrix doesn't generate dialogue, it only analyzes content. When you pass text or an action, it returns emotion coordinates on the valence (pleasant/unpleasant) and arousal(energetic/calm) scale. For example: - [0.00, 0.00] = neutral - [0.29, 0.80] = excited - [-0.50, -0.30] = sad/tired I made a quick visualizer here to help understand https://bit.ly/3WnQZmU The system helps select which dialogue/action to play based on emotional state: - Player says something bad to NPC → system detects negative valence → game picks from "angry dialogue pool" - NPC remembers past positive interactions → system returns positive valence → friendlier responses available So, the devs still write the dialogues or choose the next actions, but the matrix helps manage NPC emotional states and memory dynamically. Here's the project structure to better understand how it works: - src/config: Helper utilities for NPC configuration setup - src/module: The core engine with emotion prediction, memory storage, and entity management - src/api: FFI layer with pub extern "C" to bridge our modules with C/C++ game engines and modding tools (Unity, Unreal, etc.) To implement it, just call `build.sh`, it will create DLL files that you can use to call the matrix functions directly in C++/C/C#. I'd love feedback on code quality and overall architecture. Feel free to be honest about the good, the bad, and the ugly. PRs welcome if you want to contribute! https://bit.ly/48OIRmR September 29, 2025 at 02:05PM

Show HN: BetterBrain – Dementia prevention, covered by insurance https://bit.ly/4gSyznT

Show HN: BetterBrain – Dementia prevention, covered by insurance Hey all! I’ve been building BetterBrain for the past few months, which is the first dementia prevention program entirely covered by insurance. BetterBrain combines expert clinicians, comprehensive testing and state of the art AI - and for many insurance plans is $0. Research shows that dementia can be detected up to 20 years in advance. Despite this, many people at risk of dementia overlook regular brain health assessments. Many members of our founding team have family members affected by neurodegenerative disease. We’re also hiring aggressively if anyone is interested in changing the future of treating neurodegenerative disease. Would love to talk to anyone interested https://bit.ly/4h36biX https://bit.ly/4h36biX October 3, 2025 at 03:03AM

Show HN: Uber for Flights https://bit.ly/4pScw4P

Show HN: Uber for Flights My friend and I built BookMyFlight to finally modernize flight search + booking. Why we built this: - Personalization. I fly the same route every month, and there’s no platform that knows my preferences so that I can open it, find and book my flight, and close it within a minute. - Booking is slow. I hate seeing a long clunky airline form each time I need to book. I want booking a flight to feel more like booking an Uber. How it works: 1. Optionally make an account and save your traveler preferences. Personally, I've specified my routine route as SFO to CLE and that I only want red-eye direct flights for this route. 2. Search for flights using chat or the search panel. Chat feels especially time-saving when you have preferences saved (e.g. I just say “search my routine trip"). 3. Once you find the flight you want, use the one-click book feature which books your flight directly with the airline. The first time you book a flight, you’ll have to fill out your traveler info, but you won't see that form after that. Notes: - Your booking is directly with the airline (this means when something goes wrong, you get direct support from the airline—not a third-party) - You can add your rewards numbers for each airline to keep earning points/status The ultimate goal is to create the best possible experience that every traveler wants, but that OTAs and airlines don’t care to create. Also very receptive to hearing pain points from frequent flyers; we think this space is really outdated and could use some innovation. Try it out and let us know what you think :) https://bit.ly/4pJjclE October 2, 2025 at 08:59PM

Show HN: Silobase – Firebase/Supabase alternative as NPM package https://bit.ly/4gUlgDB

Show HN: Silobase – Firebase/Supabase alternative as NPM package I built Silobase , an open-source backend-as-a-service packaged as an npm module. With just a package.json and a .env file, you can deploy a REST API on top of your own database. https://bit.ly/4pRIoX6 October 2, 2025 at 08:01AM

Show HN: Photo AI Editor – Edit, Transform and Enhance Photos with Text Prompt https://bit.ly/4nTu8LM

Show HN: Photo AI Editor – Edit, Transform and Enhance Photos with Text Prompt https://bit.ly/46MOMq9 October 2, 2025 at 07:49AM

Show HN: Rostra is a P2P (f2f) social network https://bit.ly/3WiPdn3

Show HN: Rostra is a P2P (f2f) social network A public instance is available at https://bit.ly/46MUgRt . It will default to showing the interface from the perspective of my own identity, in a read-only mode. Click "Logout" and then "Random" to generate your own identity to play with. https://bit.ly/3KtlaXf October 1, 2025 at 11:10PM

Show HN: ChartDB Agent – Cursor for DB schema design https://bit.ly/3VGI9R5

Show HN: ChartDB Agent – Cursor for DB schema design Last year we launched ChartDB OSS ( https://bit.ly/3JjJ4UG ) - an open-source tool that generates ER diagrams from your database (via query/sql/dbml) without needing direct DB access. Now we’re launching the ChartDB Agent. It helps you design databases from scratch or make schema changes with natural language. You can: - Generate schemas by simply describing them in plain English - Brainstorm new tables, columns, and relationships with AI - Iterate visually in a diagram (ERD) - Deterministically export SQL script Try it out here - https://bit.ly/3Kx7Z7C - no signup required. Or sign up and use it on your own database Would love to get your feedback :) https://bit.ly/48I7XDW October 1, 2025 at 02:38PM

Show HN: I made a website you can only visit in airplane mode https://bit.ly/4nFGc3B

Show HN: I made a website you can only visit in airplane mode I made a little website you can only visit when your phone is in airplane mode. Enjoy that short moment of disconnection. https://bit.ly/4mPCS4J September 30, 2025 at 08:41PM

Show HN: I made an open-source web engine for relativistic simulations https://bit.ly/48b9IJE

Show HN: I made an open-source web engine for relativistic simulations Dedicated to the brave men and women who gave their lives so we could begin again. https://bit.ly/3IP3B3g October 1, 2025 at 09:19AM

Show HN: AI that trades speed for reliability in site generation https://bit.ly/3KKGUhg

Show HN: AI that trades speed for reliability in site generation I run a small agency and we’ve been building client websites for years. The work is hands-on, repetitive, and time consuming. We tried platforms like Replit and Lovable, but the output didn’t hold up for production use. Things were missing, editing was limited, and reliability was an issue. Out of that frustration we built Zylo, an AI platform that generates production-ready web apps. It is not instant like Lovable (our builds take roughly 15 minutes on average depending on complexity) but we focused on completeness and reliability instead of speed. What Zylo does Generates full stack Next.js projects including frontend, backend, and database setup Built-in domain management so you can bring your own or purchase directly inside Zylo E-commerce system that feels like a lightweight Shopify with product management and categories Stripe integration through API connection for payments How it works under the hood You interact with an AI chatbot that coordinates several agents following the same processes we used manually when building sites Agents generate code, proofread, and check for missing assets or design issues Any build, runtime, or TypeScript errors are automatically caught and repaired before deployment A final agent handles production deployment and gets the project hosted and ready for a domain connection Editing We put a lot of effort into the editing side. There is a live Monaco editor that renders the site. You can click directly on any component, section, or entire page and pass that as context back to the agents for regeneration. This was something we found lacking in other tools and wanted to solve. What’s next We are currently working on a visual workflow builder. Think of something similar to GoHighLevel’s UI, but instead of manually wiring things, the AI fills in the code and functionality behind the scenes. The idea is to let people map out flows visually and have them actually run in production. We would love feedback from the HN crowd. The big trade-off we made is slower build times in exchange for more complete and reliable projects. Do you think that trade-off makes sense, or would speed always win out for you? https://bit.ly/4o0LEOp September 29, 2025 at 10:03PM

Show HN: National Internet Control Center Minigame https://bit.ly/42Nztfw

Show HN: National Internet Control Center Minigame - This minigame lets you make decisions of national and personal importance; 10 wrong decisions results in prison time! - Commendations and praise from your boss and positive press coverage for correct decisions - National outrage if you let any threats through! https://bit.ly/4nPODZO September 29, 2025 at 10:13PM

Show HN: "Code Mode" for Vercel AI SDK https://bit.ly/4gOAsCb

Show HN: "Code Mode" for Vercel AI SDK I think code mode is a game changer. You can compose multiple tool calls in a single LLM step. I just built it as a plug-and-play wrapper of vercel's ai sdk. https://bit.ly/48DeYWw September 28, 2025 at 11:04PM

Show HN: Reddit browser for MCP clients – works with any AI assistant https://bit.ly/3KiKvDk

Show HN: Reddit browser for MCP clients – works with any AI assistant Built this to give AI assistants native Reddit access. No more copy-pasting links. You can ask things like "what's the sentiment on TypeScript vs JavaScript in r/webdev" or "analyze the top posts about GPT-5 today" and get instant analysis. Technical: TypeScript, 3-tier rate limiting (anonymous works fine for most), LRU cache under 50MB. Works with any MCP client, not just Claude. Someone used it to track reactions to H-1B changes across different country subreddits in real-time - that was pretty cool to see. Open to feature requests and contributions welcome! Would love to hear how you might use this or any Reddit API patterns you've found useful. https://bit.ly/46D3rUB September 29, 2025 at 06:22AM

Show HN: Free developer-first OneNote alternative https://bit.ly/4nXFT40

Show HN: Free developer-first OneNote alternative Hey Everyone, been working on a note-taking app called janta (Just Another Note Taking App) the past few months. You can try it out at app.janta.dev (you will be redirected to app.janta.dev/canvas/temporary, which is the locally-stored whiteboard you can access) I felt limited with OneNote, Excalidraw, and other infinite-canvas style apps, so I built an alternative. You have access to code-editors, Desmos graphs, and rich text editors (SlateJS). This is because the canvas is designed in a way that allows web components to exist on the same layer as pen-strokes, so you can annotate code, circle points-of-inflection, and programmatically generate graphs using matplotlib.pyplot! This is a beta release, and feedback would be awesome! https://bit.ly/4nXFTB2 September 29, 2025 at 03:04AM

Show HN: Automatically set real iOS alarms for calendar events https://bit.ly/46ZhwNA

Show HN: Automatically set real iOS alarms for calendar events I kept missing appointments and meetings because calendar notifications are too easy to ignore. Alarms, on the other hand, always break through silent mode/DND and force you to acknowledge them — but setting them manually every day was another chore. With iOS 26’s new AlarmKit, I built Beacon: it automatically syncs with your Apple Calendar and converts important events into real iOS alarms. You can define simple rules (like “only events with ‘Interview’ in the title” or “meetings with 3+ attendees”), and Beacon sets the alarms for you — no extra work required. Would love feedback! https://apple.co/3IIHiwe September 29, 2025 at 02:11AM

Show HN: Lizard Button Clicker Game https://bit.ly/4pPs1KY

Show HN: Lizard Button Clicker Game The Lizard Button Clicker is the most authentic recreation of the viral Lizard Button meme. This addictive clicking game features the original Lizard Button sounds and mechanics, allowing you to experience the hypnotic Lizard Button phenomenon while tracking your clicks per second and earning points. https://bit.ly/46LY7hP September 28, 2025 at 04:38AM

Show HN: Blognerd – search posts, blogs and export OPML https://bit.ly/42NbMnz

Show HN: Blognerd – search posts, blogs and export OPML I indexed a lot of blogs and posts for another project so thought I'd put together a way to make them searchable and surf-able. Some things you can do with blognerd - search blogs and posts - surf blogs that are similar to other blogs - find posts similar to other posts - export RSS feeds as OPML, CSV It's rough around the edges and sometimes a bit janky, but would love feedback / ideas to make it (more) useful! Thanks! https://bit.ly/3Kpp8Ak September 27, 2025 at 06:16PM

Show HN: Lingo – A linguistic database in Rust with nanosecond-level performance https://bit.ly/42Hwvcs

Show HN: Lingo – A linguistic database in Rust with nanosecond-level performance Hi HN, I made Lingo - the SQLite of semantic search. I'm a self-taught developer and researcher who left school at 16, and I've spent some time exploring a first-principles approach to system design for various frontier problems. In this case it's AI that challenges the 'bigger is better' transformer paradigm. Lingo is the first piece of that research, a high-performance linguistic database designed to run on-device. The full technical overview and manifesto is here: https://bit.ly/46VlCGq The paper has been archived on Zenodo with a DOI: https://bit.ly/4nscT4z The code is open-source and can be found at https://bit.ly/4nokSPU , it's currently broken and feature incomplete but I'm working on it - just wanted to start getting some feedback. All benchmarks are reproducible from the repo and can also be found in the various texts. As an independent without academic affiliation, I'd be incredibly grateful for your feedback! I'm here to answer any questions. Cheers! September 25, 2025 at 02:52PM

Show HN: Embeddable Interactive Components in AI Responses for Enhanced Learning https://bit.ly/3WeSvaQ

Show HN: Embeddable Interactive Components in AI Responses for Enhanced Learning Hey folks, I was frustrated by how static and passive most AI-generated educational content is. A perfect explanation is great, but it doesn't guarantee "learning". To fix this, I built a system to dynamically inject and render interactive elements into the LLM's response, turning what would rather be walls of just text into a live learning environment. An example of it in action is this super cool explanation on the rules of basketball - https://bit.ly/3WcoDMk Or a simple DSA question of how bubble sort algorithm works: https://bit.ly/3KGwv6e We are able to see in this examples that "learning" with AI does not have to be just about text. I would love to confirm whether or not we're innovating in the right direction with this. you can try it here: https://bit.ly/4myP2i7 September 26, 2025 at 09:18PM

Show HN: A web version of Pips game (NYT domino game) https://bit.ly/42h6qAW

Show HN: A web version of Pips game (NYT domino game) Hi everyone, I’m an indie developer learning Next.js and a big fan of the NYT game Pips. Inspired by it, I built https://bit.ly/3KouTxV — a responsive web version of Pips with smooth gameplay on both desktop and mobile. What makes this project different from NYT’s version is that you can play it infinitely under three difficulty levels: Easy / Medium / Hard. This is the first time I’ve built a game. Along the way I ran into many difficulties: implementing the game logic, configuring the UI, matching layouts for small and large screens, etc. I spent many lonely nights and sometimes even doubted whether I could complete the whole project. After 24 days of persistent effort, the project is finally finished. No signup required — just go and play. If you try it out I’d really appreciate your feedback: what you like, what bugs you see, what could be improved. Thanks! https://bit.ly/3KouTxV September 27, 2025 at 02:23AM