Show HN: Zonformat– 35–60% fewer LLM tokens using zero-overhead notation https://ift.tt/lxkfDVj

Show HN: Zonformat– 35–60% fewer LLM tokens using zero-overhead notation hey HN! Roni from India — ex-Google Summer of Code(GSoC) @ internet archive, full-stack dev. got frustrated watching json bloat my openai/claude bills by 50%+ on redundant syntax, so i built ZON over a few weekends: zero-overhead notation that compresses payloads ~50% vs json (692 tokens vs 1,300 on gpt-5-nano benchmarks) while staying 100% human-readable and lossless. Playground -> https://ift.tt/ha1NBkV ROI calculator -> https://ift.tt/zvBWlyr <2kb typescript lib with 100% test coverage. drop-in for openai sdk, langchain js/ts, claude, llama.cpp, streaming, zod schemas—validates llm outputs at runtime with zero extra cost. Benchmarks -> https://ift.tt/J3eE4gm try it: npm i zon-format or uv add zon-format, then encode/decode in <10s (code in readme). full site with benchmarks: https://zonformat.org github → https://github.com/ZON-Format harsh feedback on perf, edge cases, or api very welcome. if it saves you a coffee's worth of tokens, a star would be awesome let's make llm prompts efficient again https://zonformat.org December 9, 2025 at 03:55AM

Show HN: I built a system for active note-taking in regular meetings like 1-1s https://ift.tt/HpIiRyD

Show HN: I built a system for active note-taking in regular meetings like 1-1s Hey HN! Like most here regular meetings have always been a big part of my work. Over the years I've learned the value of active note taking in these meetings. Meaning: not minutes, not transcriptions or AI summaries, but me using my brain to actively pull out the key points in short form bullet-like notes, as the meeting is going on, as I'm talking and listening (and probably typing with one hand). This could be agenda points to cover, any interesting sidebars raised, insights gotten to in a discussion, actions agreed to (and a way to track whether they got done next time!). It's both useful just to track what's going on in all these different meetings week to week (at one point I was doing about a dozen 1-1s per week, and it just becomes impossible to hold it in RAM) but also really valuable over time when you can look back and see the full history of a particular meeting, what was discussed when, how themes and structure are changing, is the meetings effective, etc. Anyway, I've tried a bunch of different tools for taking these notes over the years. All the obvious ones you've probably used too. And I've always just been not quite satisfied with the experience. They work, obviously (it's just text based notes at the end of the day) but nothing is first-class for this usecase. So, I decided to build the tool I've always felt I want to use, specifically for regular 1-1s and other types of regular meetings. I've been using it myself and with friends for a while already now, and I think it's got to that point where I actually prefer to reach for it over other general purpose note taking tools now, and I want to share it more widely. There's a free tier so you can use it right away, in fact without even signing up. If you've also been wanting a better system to manage your notes for regular meetings, give it a go and let me know what you think! https://withdocket.com December 8, 2025 at 07:21PM

Show HN: Octopii, a runtime for writing distributed applications in Rust https://ift.tt/qnO2oRy

Show HN: Octopii, a runtime for writing distributed applications in Rust https://ift.tt/Mx7p3Nr December 8, 2025 at 09:46PM

Show HN: Web app that lets you send email time capsules https://ift.tt/TeOdR1J

Show HN: Web app that lets you send email time capsules I had an issue where I would journal stuff, and then never look at what I wrote. So I thought it'll be cool to schedule something that will get sent to you at a later time (like a time capsule). Also, was inspired by futureme, where you can send yourself letters that'll arrive in the future. https://resurf.me December 8, 2025 at 08:37AM

Show HN: Crier – Push notifications via TCP or MQTT (no public IP needed) https://ift.tt/fa1njsR

Show HN: Crier – Push notifications via TCP or MQTT (no public IP needed) https://ift.tt/8WSdEQJ December 8, 2025 at 03:50AM

Show HN: I replaced my premium workout app with vibecode https://ift.tt/Mze6c1S

Show HN: I replaced my premium workout app with vibecode I was going through my app subscriptions and realized I was paying $15 for a pretty good workout app, which seemed a bit high to me. As a software engineer who is also well versed in claude code, I realized that I could likely vibecode a very similar app, or even build something more to my liking. I challenged my self to build something roughly equivalent this afternoon. Workflow was: start with a detailed spec from Claude code describing many of the features common in workout apps. Then paste this into lovable to have it build out the initial mvp. Once that was built, I used claude code extensively to modify the app until it was usable, including adding an import from the costly premium app. While there are bugs, I think I might use this app. And it is insane that we are in a place where I can build this on my phone during an afternoon. In a few years, the economics of apps is going to be different, at least for folks willing to work a little bit. In theory this project will save me over $190 a year. https://ift.tt/1P59bci December 7, 2025 at 09:55PM

Show HN: A Markdown document manager in Rust https://ift.tt/d563H8f

Show HN: A Markdown document manager in Rust Hi HN, I’m an ex-Amazon engineer. I built Seychl because I was tired of waiting 3 seconds for my notes to load in cloud-based apps. Seychl is a local-first knowledge base designed for speed. UI interactions are always instant (<16ms). Features for power users: - Full keyboard control (never touch the mouse) - Vim mode built-in - Markdown storage (you own your data) - Instant search across 10k+ notes - Persistent Tmux-like sessions, windows and panes It’s basically "Linear for knowledge management" – focusing on ergonomics and speed over bloated features. You can download the binary here (currently MacOS only): https://github.com/Seychl/seychl-release/releases/download/0... https://www.seychl.app/ December 7, 2025 at 04:01AM