Show HN: SIMD-Optimized Bloom Filters in Mojo for Large-Scale Systems https://bit.ly/3UBHC2i

Show HN: SIMD-Optimized Bloom Filters in Mojo for Large-Scale Systems https://bit.ly/3V05e0R August 21, 2025 at 11:56PM

Show HN: I replaced vector databases with Git for AI memory (PoC) https://bit.ly/472kvFu

Show HN: I replaced vector databases with Git for AI memory (PoC) Hey HN! I built a proof-of-concept for AI memory using Git instead of vector databases. The insight: Git already solved versioned document management. Why are we building complex vector stores when we could just use markdown files with Git's built-in diff/blame/history? How it works: Memories stored as markdown files in a Git repo Each conversation = one commit git diff shows how understanding evolves over time BM25 for search (no embeddings needed) LLMs generate search queries from conversation context Example: Ask "how has my project evolved?" and it uses git diff to show actual changes in understanding, not just similarity scores. This is very much a PoC - rough edges everywhere, not production ready. But it's been working surprisingly well for personal use. The entire index for a year of conversations fits in ~100MB RAM with sub-second retrieval. The cool part: You can git checkout to any point in time and see exactly what the AI knew then. Perfect reproducibility, human-readable storage, and you can manually edit memories if needed. GitHub: https://bit.ly/4mQ1k6e Stack: Python, GitPython, rank-bm25, OpenRouter for LLM orchestration. MIT licensed. Would love feedback on the approach. Is this crazy or clever? What am I missing that will bite me later? https://bit.ly/4mQ1k6e August 21, 2025 at 07:20AM

Show HN: Resignation Letter：I built a website can generate resignation letter https://bit.ly/47GTtUn

Show HN: Resignation Letter：I built a website can generate resignation letter https://bit.ly/3V9nq7Y August 21, 2025 at 05:57AM

Show HN: Infinite Tetris Grid https://bit.ly/4mVHAyh

Show HN: Infinite Tetris Grid You can scroll left and right forever If you press the ∞ button, you can scroll up forever https://bit.ly/4mLXpHK August 21, 2025 at 03:07AM

Show HN: MCP Server for PostgreSQL Monitoring/Operations (MCP-PostgreSQL-Ops) https://bit.ly/3JqRutl

Show HN: Hanaco Weather – A poetic weather SNS from the OS Yamato project https://bit.ly/45BX4R2

Show HN: Hanaco Weather – A poetic weather SNS from the OS Yamato project hanaco Weather is a minimalist social network where users post short, emotional weather thoughts and connect with others experiencing the same weather. No likes or followers (for now) — just gentle presence. Built entirely by a solo engineer, including the custom operating system it runs on: OS Yamato. What is OS Yamato? OS Yamato is a poetic, ephemerality-first operating system designed to let digital memories bloom and fade, like flowers in the wind. Features include: Diaries that bloom like seasonal flowers — and wither if forgotten Photos and videos that quietly disappear unless viewed again Chat with ambient seasonal effects and no pressure A soft, nature-inspired calendar with reusable schedule templates Wind Messages — time-delayed letters that arrive months later A 3D globe to see fleeting connections blossom around the world Each app within OS Yamato reflects a different way of embracing impermanence in the digital world. Learn more about the concept and philosophy: [YouTube – Write a diary, and a flower will bloom]( https://youtu.be/JrqwU_N5WBA?si=kZQAadNdBGipk6gz ) Try Hanaco Weather now: https://bit.ly/3JlLqCt #ShowHN #HanacoWeather #OSYamato #solodev #minimalism #digitalpoetry #webapp #ephemeral https://bit.ly/4mn7RWe August 20, 2025 at 05:04AM

Show HN: PineBill – make invoices in the browser (free, no ads, no account) https://bit.ly/47575so

Show HN: PineBill – make invoices in the browser (free, no ads, no account) Hello everyone, I was tired of bloated invoicing apps, paywalls, and forced signups, so I built PineBill. It runs entirely in your browser: fill in products and customer details on the left, see a live preview on the right, then export/download a PDF. No ads, no tracking, no account. I first shared it on Reddit and got a bunch of thoughtful feedback; it’s now at ~3k monthly active users. I’d love your critiques, bug reports, and feature ideas. Reddit post: https://bit.ly/45DgepC... https://bit.ly/41dstb4 August 20, 2025 at 03:15AM

Show HN: Network-filter – domains-based whitelist for Docker containers https://bit.ly/475IPX0

Show HN: Network-filter – domains-based whitelist for Docker containers Built this because LLM tools with MCP servers (OpenCode, Goose, Claude code, etc.) have too much network access. It uses network_mode: 'service:x' to force containers through iptables rules that drop everything except whitelisted domains. No proxy - operates at the network namespace level so bypasses aren't possible. https://bit.ly/3Uy4Q9x August 20, 2025 at 01:27AM

Show HN: Rucat – Cat for Prompt Engineers https://bit.ly/41JZWdm

Show HN: Rucat – Cat for Prompt Engineers Aloha HN - I'm redbeard, ex-CoreOS homey, RISC-V guy, and general free software wingnut. Like many of us, I've increasingly found myself using AI for my work. One of the challenges for me is that I prefer to stay on the command line and I'm often working on remote machines over SSH. This often means moving off of the keyboard to use the mouse or a complex chording of characters to capture output from the buffer. Capturing a single file isn't too challenging on a localhost (`cat | wl-copy` /`cat | pbcopy`, etc) but this is still really focused on single files. If you're capturing multiple files, the content (of course) gets catenated together. "There's got to be a better way!" After realizing the many terminals support ANSI control code OSC 52 and my preferred terminal, Kitty, supports OSC 5522 I put together "rucat", a cat inspired tool for capturing multiple files with additional semantic data. Rucat excels at capturing multiple files quickly and without worrying about serialization loss. It's been written in Rust to intentionally avoid a number of memory safety and string parsing issues as well as providing a path to cross platform support. The tool is currently available in binary and source form in the repository. Feedback is welcomed! https://bit.ly/4mlkEZj August 20, 2025 at 12:41AM

Show HN: Skilfut – 138 UI components to help devs build faster and prettier https://bit.ly/3V8d5Jy

Show HN: Skilfut – 138 UI components to help devs build faster and prettier Hi HN, I’m César, a non-developer who started building prototypes using vibe coding (AI + prompts instead of code). While doing this, I realized a big issue: it’s incredibly hard to get a good design. Most sites end up looking the same. So I built Skilfut — a SaaS that provides a library of 138 UI components, each with its associated prompt. You can copy/paste them into your no-code or AI-coding workflow and get functional, styled blocks right away. Already 138 components available New components added every week (+200 planned) Designed in collaboration with designers from companies like Uber Goal: help vibe coders / indie hackers ship faster while standing out visually I soft-launched on Reddit and was surprised: over 100 people joined the waitlist in just 2 days. Now the V1 is live: https://bit.ly/4lvOhWR I’d love your feedback: – Do you think UI libraries like this can really help vibe coders / AI devs? – What would you want to see improved or added? August 19, 2025 at 07:45AM

Show HN: Side Space – An Arc-like AI-powered Vertical tabs manager for Chrome https://bit.ly/4oFgOMa

Show HN: Side Space – An Arc-like AI-powered Vertical tabs manager for Chrome Side Space is an AI-powered browser extension for managing tabs in a vertical side panel. Side Space is a browser extension designed to help users organize and manage their open tabs more efficiently. It adds a vertical tabs manager to your browser’s side panel, making it easier to categorize, group, and switch between tabs for work, life, hobbies, and more. Key features include: • Vertical Spaces: Organize tabs into separate spaces (like work, shopping, or school) for better focus. • AI-Powered Grouping: Automatically group tabs using AI, or by domain, to reduce clutter. • Cloud Sync: Sync your spaces and tabs across devices by logging into your account. • Tab Management Tools: Pin tabs, search tabs, suspend tabs to save memory, de-duplicate tabs, and save/restore tab groups. • Customization: Change the color palette of spaces and switch between light/dark modes. • Autosave & Restore: All tabs are autosaved, so you can restore them anytime. Side Space offers a free plan (up to 5 spaces and 1,000 URLs) and a one-time paid plan for unlimited spaces and URLs. It’s available for Chrome, Brave, and Edge browsers. If you’re tired of messy, disorganized tabs, Side Space helps you keep everything neat and easy to find, all from a convenient sidebar. https://bit.ly/4oIWk5m August 19, 2025 at 04:35AM

Show HN: Memeclip.ai – AI-powered meme maker that turns text into memes https://bit.ly/4fLXVTS

Show HN: Memeclip.ai – AI-powered meme maker that turns text into memes Hey HN! I built MemeClip.ai - an AI meme maker that transforms any text into viral memes Why I built this: Most people want to express themselves with memes but face real barriers: they don't know what's trending, can't think of funny captions, or don't understand which templates work for different situations. I wanted to solve this by building an AI that understands both meme culture and context. Technical highlights: Semantic template matching: Text and image embeddings to find the perfect template match for any concept. Vision-language model integration: AI grasps visual context and meme structure for perfect captions What's different: Traditional meme generators like Imgflip are just template galleries with text editors - you pick a template and write captions yourself. MemeClip reverses this: describe your situation and our AI finds the perfect template and generates the caption automatically. Would love to hear what HN thinks! Happy to answer any questions about the tech stack, AI approach, or meme philosophy Thanks for try out https://bit.ly/4mV9Np7 August 19, 2025 at 03:46AM

Show HN: An Elisp tutorial made to run inside Emacs (constructed by Claude Code) https://bit.ly/3Jdy8b8

Show HN: An Elisp tutorial made to run inside Emacs (constructed by Claude Code) https://bit.ly/4mkYvKE August 18, 2025 at 01:11AM

Show HN: BoneClone – A tool to autodiscover repos to propagate skeleton changes https://bit.ly/3HGqlSu

Show HN: BoneClone – A tool to autodiscover repos to propagate skeleton changes https://bit.ly/41Kf9uU August 17, 2025 at 10:08PM

Show HN: RouteScout – A bike routing app that lets you love or hate hills https://bit.ly/4mT60sp

Show HN: RouteScout – A bike routing app that lets you love or hate hills Hi HN, I’m a high school student in Seattle who loves riding hills. I found that route makers like Google Maps get you from point A to B on a bike, but they don’t give you fun routes. So i made my own RouteScout lets you: - Control the surfaces (never gravel or dirt with a road bike!) on the route - Indicate your preference for hills (I LOVE or HATE hills gives you different routes) - Prefer routes with bike lanes and cycling paths and roads made for bikes. - Filter types of roads (big roads gone!) - And when looping around it won’t take you back on the same exact road on the way back *Upcoming feature*: Being able to use your previous activities from Strava to give you the option to favor roads that you’ve never been on (or have been on). The app is free forever (without selling daya). Try it here: https://bit.ly/4mvoY8v I wrote all of the routing, database, and logic (no AI) So if you end up running into any issues please email me at rs@tennisbowling.com and i’ll fix them asap. August 18, 2025 at 12:14AM

Show HN: Procrastinope, an open-source website blocker https://bit.ly/45p0Oqk

Show HN: Procrastinope, an open-source website blocker I built Procrastinope, an open-source alternative to Cold Turkey Blocker that focuses on privacy. Cold Turkey Blocker is fantastic, but I was frustrated that it required trusting closed-source software that can see effectively all activity on my computer. The main differentiator for Procrastinope is transparency -- unlike proprietary blockers, you can inspect exactly what it's doing to your system. In short, it works by modifying `/etc/hosts` and includes several anti-bypass features: - Challenge-protected controls (type random strings to disable blocks) - Auto-restart daemon to prevent killing the process - Anti-tamper logic which prevents manual edits to /etc/hosts config files - System-level blocking across all browsers GitHub: https://bit.ly/4fBOsOQ https://bit.ly/4fBOsOQ August 17, 2025 at 03:58AM

Show HN: A condensed CS book called Computers, written by Claude Code https://bit.ly/4fG2UFG

Show HN: A condensed CS book called Computers, written by Claude Code https://bit.ly/45mIrSP August 16, 2025 at 05:31PM

Show HN: Lit-Toaster – Notifications for Lit Web Components https://bit.ly/3HcM2tu

Show HN: Lit-Toaster – Notifications for Lit Web Components Here’s a library for creating toast notifications in Lit Web Components. Feel free to contribute, leave a star on the repository, or share your feedback here. If unfamiliar with Lit, here's link to docs: https://bit.ly/45iV8hq https://bit.ly/45wMGtH August 16, 2025 at 01:45AM

Show HN: Run Your Own ChatGPT Agent on Cloudflare Containers https://bit.ly/3V1tW0u

Show HN: Run Your Own ChatGPT Agent on Cloudflare Containers Hi HN! I was disappointed when the ChatGPT Agent announcement came with the note that there'd be limited usages available for something that's architecturally simple: > Pro users have 400 messages per month, while other paid users get 40 messages monthly, with additional usage available via flexible credit-based options. So assembled this with Cloudflare's recent Containers API. Here's a link to the tweet we posted launching it: https://bit.ly/3V4EUlY Feel free to fork or star and make funny things happen :) https://bit.ly/47wuVNK August 15, 2025 at 08:48PM

SHOW HN: I made a 30fps CLI Tetris game in PHP after watching the Tetris movie https://bit.ly/41H5rJK

SHOW HN: I made a 30fps CLI Tetris game in PHP after watching the Tetris movie https://bit.ly/3JgbBdK August 15, 2025 at 09:32AM