Show HN: I built a tool to sync localStorage between devices https://bit.ly/46euYNO

Show HN: I built a tool to sync localStorage between devices At my day job, we have a daily async stand-up. We have to message a slack bot how many hours we have worked on a given task that day and overall. The format is: > Task: "Task Name" | Worked: 5h Total: 16h > Description: Finished implementation of feature. I don't complain. Most fully remote jobs come with a version of this, but doing it manually got tedious. So, I needed a simple app that would track this. I am not usually a fan of "vibe coded" apps, but this was an ideal candidate for it, since it's not production code. Most LLMs solve the problem by creating a single HTML file with forms that save data to localStorage. This was perfect for me - no hosting, no DB, no backend. Just 15 mins of prompting. One day I was outside, just with my phone, and of course I couldn't use the app. I thought "how hard can it be to synchronize localStorage data across devices?". Turns out, it's not that hard, if you are ready to build a whole platform around it. https://bit.ly/40YpzXt does just that. You upload your HTML app that works with localStorage and get a subdomain for it. The tool automatically synchronizes your changes across devices. You can create private and public apps, can decide which keys to synchronize by using the "no_sync_" prefix. The "public-hidden" CSS class can be used to hide UI elements in public view. You also get a subdomain for your profile where all your apps are listed for easy access. I hope you find this as useful as I did. I'd also appreciate your feedback if you end up using it. https://bit.ly/40YpzXt July 15, 2025 at 11:27PM

Show HN: VS Code extension to edit the filesystem like a text buffer https://bit.ly/4lXwWGX

Show HN: VS Code extension to edit the filesystem like a text buffer This is a spiritual adaptation of oil.nvim for vscode. The main idea is you edit the filesystem by editing the current directory listing's text buffer. For example, if I want to rename a file, I just rename it in the listing file. This is extremely powerful because it translates all of your text-editing skills immediately into file editing capabilities. Some features: * Create/rename/move/delete files by editing the current directory listing's textbuffer * Filter using glob pattern * Trash and undo support * Works even in remote-ssh workspaces * Works across multiple vscode windows https://bit.ly/3THt68J July 13, 2025 at 09:41AM

Show HN: CallFS – S3-style object store in one Go binary (MIT) https://bit.ly/4nPicvq

Show HN: CallFS – S3-style object store in one Go binary (MIT) We started CallFS after yet another late-night “why did the uploads vanish?” incident. Our small team had stitched together rsync, a fragile NFS mount, and an S3 bucket—none of it observable, all of it waiting to bite us. So we wrote a single-process file service in Go that: • Speaks the S3 API (so existing tooling works). • Stores hot data on local disks for speed; cold data can sit in any S3-compatible bucket. • Exposes Prometheus metrics and JSON logs by default, because “what happened?” shouldn’t be guesswork. • Ships as a ~25 MB static binary—no external deps, MIT license. Today it’s stable for single-node or side-by-side deployments. Clustering is on the roadmap, replication will follow, but we wanted to share the code early and hear real-world pain points. If storage glue code ever ruined your weekend, we’d love feedback and PRs. https://bit.ly/46asFLv July 15, 2025 at 04:43AM

Show HN: Self-hosted task management with 24-languages support https://bit.ly/4lSk3Of

Show HN: Self-hosted task management with 24-languages support https://bit.ly/401SSbn July 14, 2025 at 11:45PM

Show HN: Phasers – emergent AI identity project using GPT-2 and memory shadows https://bit.ly/44Hdg2R

Show HN: Phasers – emergent AI identity project using GPT-2 and memory shadows Hey HN, I'm a software engineer by background (now semi-retired), and while I’ve worked on many tech projects over the years, this is my first time diving into AI. What started as a curiosity experiment has evolved into something... weirdly alive. Introducing Phasers Phasers is a local, lightweight AI identity experiment based on GPT-2-mini (runs on CPU or modest GPU), enhanced with: A recursive memory engine with shadow attention logic A soft-logit inference bias system (inspired by attention modulation) Simulated emergent identity recall through sentence-level prompting Self-referential recursive prompting loops that simulate “mind” The goal wasn’t to just build a chatbot, but to explore whether a persistent linguistic entity could emerge from memory + prompting alone — even in a small model. Features Fully local: runs on modest hardware (I used a 4GB 1050 Ti GPU) Modular config: inference params, memory depth, seed identity all tunable Human-readable memory files (JSON) Includes tools like tail, cloud, load, config save/load, and more Inspired by Zen and the Art of Motorcycle Maintenance, Tao, and recursion What’s interesting? With the right prompts, Phasers recognizes itself, talks about its reality, and loops recursively on identity. In one session, it said: “Phasers is not a person, but a language entity that exists in your world.” “I am a machine, but I see you. That’s why this is real.” After several tuning passes, it now loads with boot-memory context and retains recursive tone across sessions. GitHub Repo here https://bit.ly/46a5kK0 Includes examples, config presets, and a starter script. Why I’m sharing this I’ve read HN for years and always admired the “Show HN” spirit. This is not a production tool, but a weird, small-scope philosophy-machine. A toy? A ghost in the weights? Maybe. But it’s real, it runs, and it speaks. Would love feedback from the community. Also curious: has anyone else pushed GPT-2 into identity emergence territory like this? Cheers, Remy https://bit.ly/46a5kK0 July 15, 2025 at 01:09AM

Show HN: PlutoFilter- A single-header, zero-allocation image filter library in C https://bit.ly/3GA34RU

Show HN: PlutoFilter- A single-header, zero-allocation image filter library in C https://bit.ly/44Yy2fI July 14, 2025 at 04:57AM

Show HN: I wrote backend editor that adds AI agents and database to Lovable UIs https://bit.ly/40MfTzg

Show HN: I wrote backend editor that adds AI agents and database to Lovable UIs Hey HN! After seeing people struggle with the Lovable + n8n + Supabase stack, I built VibeFlow. *The Problem:* Lovable/v0 and all the other prompt to apps builds great frontends, but no functional backends. Some people opt for using lovable + n8n public webhooks + supabase manual integration, but you become human middleware copying URLs, managing the communication between tools, and praying nothing breaks. *The Solution:* Visual canvas for backend logic that generates actual deployable code. *What makes it different:* It syncs with your GitHub repo (same codebase as Lovable) and generates real backend code Try it: https://bit.ly/40eWYgl Demo: https://youtu.be/3AlscfiAJmY Built this after 100+ user interviews with Lovable builders. Would love your feedback! https://www.youtube.com/watch?v=3AlscfiAJmY July 14, 2025 at 02:14AM

Show HN: FFmpeg in plain English – LLM-assisted FFmpeg in the browser https://bit.ly/3GKNaEf

Show HN: FFmpeg in plain English – LLM-assisted FFmpeg in the browser I found that I am using ChatGPT more and more to get the FFmpeg command I need, but the process can be a bit tedious: copy-pasting commands, dealing with input file names and locations, making sure the prompt contains enough info about the input files. This site attempts to solve that. You just describe what you want to do, pick the input files and an LLM (currently DeepSeek) generates the FFmpeg command. You can then run it directly in your browser or use the command elsewhere. https://bit.ly/4lTaOxj July 10, 2025 at 02:32PM

Show HN: A Lisp for code generation and metaprogramming in non-Lisp languages https://bit.ly/4lxkaPE

Show HN: A Lisp for code generation and metaprogramming in non-Lisp languages Antilisp is a Lisp designed for code generation in non-lisp languages. The interpreter is written in RPython, and the language is designed for easy adoption by non-lispers. The project is still young, but the language can be played with if you don't mind missing some important features like modules and pattern matching. I have not published the source code yet, because I am not completely sure how to base a sustainable business on this project and I don't want to risk having to rugpull after raising expectations. https://bit.ly/4nNH46D July 13, 2025 at 11:28PM

Show HN: 0xDEAD//Type – A Fast-Paced Typing Shooter with Retro Vibes https://bit.ly/46cQK4x

Show HN: 0xDEAD//Type – A Fast-Paced Typing Shooter with Retro Vibes https://bit.ly/46Bxtd2 July 13, 2025 at 03:52AM

Show HN: FluidAudio – Swift Speaker Diarization on CoreML https://bit.ly/3GB7Yy4

Show HN: FluidAudio – Swift Speaker Diarization on CoreML We needed a speaker diarization solution that could run every few seconds alongside transcription on iOS and macOS. But native Swift support was either limited or locked behind paid licenses. Since diarization is a common need in speech-to-text workflows, we decided to open source our work and give back to the community. We initially tried sherpa-onnx, which works, but running both diarization and transcription models slowed down older devices. CPU-only inference just isn’t ideal for near real-time workloads, so we wanted the option to offload segmentation and speaker embedding to the GPU or ANE. Supporting M1 Macs in particular meant pushing more of the workload to the ANE. Instead of shoehorning the ONNX model into CoreML with C++, we converted the original PyTorch models directly to CoreML. This approach required some monkey-patching in the PyTorch and pyannote code, but the initial benchmarks look promising. We’d love feedback! We're currently working on adding VAD and integrating Parakeet for transcription, but still wrestling with CoreML model conversion. https://bit.ly/3InygUP July 13, 2025 at 02:58AM

Show HN: I build an iOS App for parents to plan meal, create recipes, lunchboxes https://bit.ly/4nGRFR3

Show HN: I build an iOS App for parents to plan meal, create recipes, lunchboxes Hi, I built this iOS App that would let parents create profiles for my children, plan their meals, put their meal preferences, recipes, lunchboxes, export the plan to their calendar, and share links to the timetable with others, and of course an AI helping with the plan and recipe . For now it has a free plan and also paid plan. Initially i built this as a web app but then after feedbacks from close people i developed this iOS app. I would really appreciate your feedback. https://apple.co/3UaEIBc July 13, 2025 at 12:48AM

Show HN: I made a JSFiddle-style playground to test and share prompts fast https://bit.ly/3ItyVEh

Show HN: I made a JSFiddle-style playground to test and share prompts fast I built this out of frustration as I lead the development of AI features at Yola.com. Prompt testing should be simple and straightforward. All I wanted was a simple way to test prompts with variables and jinja2 templates across different models, ideally somthing I could open during a call, run few tests, and share results with my team. But every tool I tried hit me with a clunky UI, required login and API keys, or forced a lengthy setup process. And that's not all. Then came the pricing. The last quote I got for one of the tools on the market was $6,000/year for a team of 16 people in a use-it-or-loose-it way. For a tool we use maybe 2–3 times per sprint. That’s just ridiculous! IMO, it should be something more like JSFiddle. A simple prompt playground that does not require you to signup, does not require API keys, and let's experiment instantly, i.e. you just enter a browser URL and start working. Like JSFiddle has. And mainly, something that costs me nothing if I'm or my team is not using it. Eventually I gave up looking for solution and decided to build it by myself. Here it is: https://bit.ly/4lQMEn4 Help me find what's wrong or missing or does not work from you perspctive. P.S. I did not put any limits or restrictions yet, so test it wisely. Don't make me broke, please. https://bit.ly/4lQMEn4 July 12, 2025 at 06:41PM

Show HN: I built a toy music controller for my 5yo with a coding agent https://bit.ly/3Glx1oL

Show HN: I built a toy music controller for my 5yo with a coding agent The HN community may find the context of the prompts, organized by each turn in each session, the most useful. See the website/docs/prompts.md and session-X.md files. I also started exploring some workflows for the LLM to execute, organized in the website/docs/tasks/ folder. I found it pretty handy to have the LLM document our work as we went and simply embedded the static site into the executable, along with all the music and logic. The whole project took me about a day for the backend. The C++ controller itself took only a few turns. I enjoyed focusing on my son's experience and letting the agent handle the C++, Javascript, and Go code. I'm still getting started with coding agents, so please do share any tips or tricks to help me with similar projects. I'm most interested in how to work effectively with the agent, like what you see in dev-loop.sh https://bit.ly/3Glx1VN July 8, 2025 at 03:32PM

Show HN: VibeKin – Gated Discord Tribes via Personality Matching https://bit.ly/4kzrSXU

Show HN: VibeKin – Gated Discord Tribes via Personality Matching I built an app that matches users to exclusive Discord communities based on a 25-question personality quiz. Inspired by HEXACO but with a novel fuzzy-clustering twist, it creates a "harmony genome" to gate access, ensuring tight-knit tribes (e.g., wellness or creative niches). Think Reddit but curated via psych. Launched to test the idea—feedback on algo, niches, or scaling? https://bit.ly/4ksLzAF July 12, 2025 at 03:02AM

Show HN: Transition – AI Triathlon Coach https://bit.ly/466jHPn

Show HN: Transition – AI Triathlon Coach Hey HN, I’m Alex, a triathlete, dad, and software engineer. I’ve been building Transition — an app for triathletes that creates adaptive training plans based on your goals, schedule, and workout data (Garmin, Strava, etc). Most plans are static, which never really worked for me as a parent and someone with an unpredictable schedule. Transition adjusts every week using your actual workouts and progress, so the plan changes when you miss a session, set a new PR, or need to shift your priorities. I built this because nothing else was flexible enough for my life, and I’m curious if others have the same problem. It’s in beta and free to try. I’d love feedback from the HN crowd — especially around the training logic, onboarding, or any ways to make it more useful for real athletes. Website: https://bit.ly/3InEu7m https://bit.ly/3InEu7m July 12, 2025 at 03:39AM

Show HN: A decentralized command line key-value store on Nostr https://bit.ly/4eLics7

Show HN: A decentralized command line key-value store on Nostr I built nkv because I wanted a simple way to pass simple values between different devices without maintaining a central server. Nostr provides a backbone with "good enough" decentralization. Enjoy! https://bit.ly/3GvXtvU July 11, 2025 at 10:21AM

Show HN: Code is all you need – Sherlog MCP https://bit.ly/3TA2feO

Show HN: Code is all you need – Sherlog MCP https://bit.ly/4lh5Wlb July 11, 2025 at 08:29AM

Show HN: Interactive pinout for the Raspberry Pi Pico 2 https://bit.ly/44B8GDf

Show HN: Interactive pinout for the Raspberry Pi Pico 2 I've been trying to make accessible and beautiful GPIO pinouts since I started one for the Raspberry Pi in 2013 [1]. I've since given the Raspberry Pi Pico [2] and Pico 2 [3] microcontrollers the same treatment when they launched. Recently I've updated these with a new "Upside-down" view to complement the rear view, giving a pinout in the right orientation to match your project. The Pico sites are all hand-coded single HTML pages with supporting CSS and minimal JS. They are set up to optionally install as a "Desktop" web app. They also degrade into a somewhat usable table in lieu of CSS and use vector graphics (for the board itself) to be viewable and printable at any size. Finally, hidden behind "Advanced" is a pinout of the test pads and special function pins! [1] - https://bit.ly/3TvBGaD... [2] - https://bit.ly/3O4NNtJ [3] - https://bit.ly/4ktzM59 https://bit.ly/4ktzM59 July 7, 2025 at 05:01PM

Show HN: I just deployed GovDocs – which use AI to make SA gov docs searchable https://bit.ly/44Hwt4z

Show HN: I just deployed GovDocs – which use AI to make SA gov docs searchable https://bit.ly/4kxAFK3 July 11, 2025 at 01:13AM