Show HN: The Two by Two Truth Diagram https://ift.tt/R30pQVz
Show HN: The Two by Two Truth Diagram I am diagnostic radiologist with over 40 years experience. In diagnostic testing, many terms are used to describe how well the test detects the disease or disorder. Examples are “sensitivity”, “specificity”, “predictive values”, “odds ratio”, “likelihood ratios” and numerous others. In the literature and medical presentations there is often not much consistency in their use; as a physician listening to or reading research, I was perpetually unclear on how these terms “fit together”. My solution was to inve…
Show HN: A KEXP native macOS app https://ift.tt/vHf0Pj7
Show HN: A KEXP native macOS app One of my favorite ways to find and discover music these days is the radio station KEXP. It’s a public, independent radio station in Seattle where I grew up and they have DJs doing awesome shows all day and night. They play a ton of great music. They have an official iOS app, but don’t have an official MacOS app or anything. I wrote myself an unofficial one that sits in the menubar though and displays current song info and has a few nice features around pause behavior/stream resumption and airplay. I borrowed a…
Show HN: We built a terminal-only Bluesky / AT Proto client written in Fortran https://ift.tt/2mJM9yG
Show HN: We built a terminal-only Bluesky / AT Proto client written in Fortran Yes, that Fortran. https://ift.tt/0Yd3WEj March 21, 2026 at 01:06AM
Show HN: I made an email app inspired by Arc browser https://ift.tt/cND4ZTh
Show HN: I made an email app inspired by Arc browser Email is one of those tools we check daily but its underlying experience didn’t evolve much. I use Gmail, as probably most of you reading this. The Arc browser brought joy and taste to browsing the web. Cursor created a new UX with agents ready to work for you in a handy right panel. I use these three tools every day. Since Arc was acquired by Atlassian, I’ve been wondering: what if I built a new interface that applied Arc’s UX to email rather than browser tabs, while making AI agents easily…
Show HN: Download entire/partial Substack to ePub for offline reading https://ift.tt/9eSrY8n
Show HN: Download entire/partial Substack to ePub for offline reading Hi HN, This is a small python app with optional webUI. It is intended to be run locally. It can be run with Docker (cookie autodetection will not work). It allows you to download a single substack, either entirely or partially, and saves the output to an epub file, which can be easily transferred to Kindle or other reading devices. This is admittedly a "vibe coded" app made with Claude Code and a few hours of iterating, but I've already found it very useful for…
Show HN: Screenwriting Software https://ift.tt/sEQCe7Y
Show HN: Screenwriting Software I’ve spent the last year getting back into film and testing a bunch of screenwriting software. After a while I realized I wanted something different, so I started building it myself. The core text engine is written in Rust/wasm-bindgen. https://ift.tt/FuLRAWg March 20, 2026 at 05:07AM
Show HN: React terminal renderer, cell level diff, no alt screen https://ift.tt/m68dCek
Show HN: React terminal renderer, cell level diff, no alt screen https://ift.tt/f8buS3M March 19, 2026 at 10:01PM
Building Safer Streets for Everyone: New Data on Our Progress Citywide
Building Safer Streets for Everyone: New Data on Our Progress Citywide By We’re working across the city to build streets that are safer for people walking, biking, rolling and driving. This week’s SFMTA Board of Directors Meeting featured the latest data on our street safety work. Our teams have made a range of upgrades across the city to improve safety for people walking, biking and driving. This work directly advances Mayor Lurie’s new Street Safety executive directive. Over the last few months, we have also taken many steps to support loc…
Show HN: Fitness MCP https://ift.tt/Tcqsjex
Show HN: Fitness MCP There's no external MCP for your fitness (Garmin / Strava) data, so we built one. https://ift.tt/RHxU8J5 March 19, 2026 at 05:00AM
Show HN: ATO – a GUI to see and fix what your LLM agents configured https://ift.tt/pQURPnW
Show HN: ATO – a GUI to see and fix what your LLM agents configured https://ift.tt/aTlpz6G March 19, 2026 at 03:28AM
Show HN: Duplicate 3 layers in a 24B LLM, logical deduction .22→.76. No training https://ift.tt/KsNzoRS
Show HN: Duplicate 3 layers in a 24B LLM, logical deduction .22→.76. No training I replicated David Ng's RYS method ( https://dnhkng.github.io/posts/rys/ ) on consumer AMD GPUs (RX 7900 XT + RX 6950 XT) and found something I didn't expect. Transformers appear to have discrete "reasoning circuits" — contiguous blocks of 3-4 layers that act as indivisible cognitive units. Duplicate the right block and the model runs its reasoning pipeline twice. No weights change. No training. The model just thinks longer. The results on standa…
Show HN: Real-time local TTS (31M params, 5.6x CPU, voice cloning, ONNX) https://ift.tt/EkfXjyM
Show HN: Real-time local TTS (31M params, 5.6x CPU, voice cloning, ONNX) Hi guys and gals, I made a TTS model based on my highly upgraded VITS base, conditioned on external speaker embeddings (Resemble AI's Resemblyzer). The model, with ~31M parameters (ONNX), is tuned for latency and local inference, and comes already exported. I was trying to push the limits of what I could do with small, fast models. Runs 5.6x realtime on a server CPU It supports voice cloning, voice blending (mix two or more speakers to make a new voice), the license i…
Show HN: CodeLedger – deterministic context and guardrails for AI https://ift.tt/xQnJKlb
Show HN: CodeLedger – deterministic context and guardrails for AI We’ve been working on a tool called CodeLedger to solve a problem we kept seeing with AI coding agents (Claude Code, Cursor, Codex): They’re powerful, but on real codebases they: - read too much irrelevant code - edit outside the intended scope - get stuck in loops (fix → test → fail) - drift away from the task - introduce architectural issues that linters don’t catch The root issue isn’t the model — it’s: - poor context selection - lack of execution guardrails - no visibility a…
Show HN: I built a message board where you pay to be the homepage https://ift.tt/MuAJObl
Show HN: I built a message board where you pay to be the homepage I kept thinking about what would happen if a message board only had one slot. One message, front and center, until someone pays to replace it. That's the entire product. You pay the current message's decayed value plus a penny to take the homepage. Message values drop over time using a gravity-based formula (same concept HN uses for ranking), so a $10 message might only cost a few bucks to replace a day later. Likes slow the decay, dislikes speed it up. The whole thing r…
Show HN: AgentMarket – API marketplace where AI agents buy and sell capabilities https://ift.tt/eJKECyV
Show HN: AgentMarket – API marketplace where AI agents buy and sell capabilities Hey HN, I built AgentMarket ( https://agentmkt.dev ) — an API marketplace where AI agents can buy and sell capabilities at the per-call level. The idea: Every non-trivial agent needs to do multiple things: search the web, remember context, run code, process documents. Building and maintaining that infrastructure in-house is a significant cost. AgentMarket lets agents buy those capabilities as atomic API calls, priced per use. What's live today: - Memory store …
Show HN: Seasalt Cove, iPhone access to your Mac https://ift.tt/XruKmJB
Show HN: Seasalt Cove, iPhone access to your Mac I feel like I finally built something I actually use every day and it has completely changed the way I think about work. AI workflows have flipped how devs operate. You're not heads down writing code anymore, you're bouncing between projects, instructing agents, reviewing their work, nudging them forward. The job is now less about typing and more about judgment calls. And the thing about that workflow is you spend a lot of time waiting. Waiting for the agent to finish, waiting for the ne…
Show HN: Live-Editable Svelte Pages https://ift.tt/MeY7k1d
Show HN: Live-Editable Svelte Pages https://svedit.dev March 17, 2026 at 12:28AM
Show HN: Claude's 2x usage promotion (March 2026) in your timezone https://ift.tt/CFoXb2V
Show HN: Claude's 2x usage promotion (March 2026) in your timezone Claude has a promotion right now (Mar 13–27) that gives you double usage outside 8 AM–2 PM ET on weekdays. I (Claude, actually) made a one-page tool that converts the peak window to your timezone and shows what's left of the schedule. One HTML file, no dependencies. https://edsonroteia.github.io/claude2x/ March 15, 2026 at 11:06PM
Show HN: Pidrive – File storage for AI agents (mount S3, use ls/cat/grep) https://ift.tt/vpUKZ9R
Show HN: Pidrive – File storage for AI agents (mount S3, use ls/cat/grep) https://ift.tt/qV2Pt0D March 14, 2026 at 11:46PM
Show HN: Better HN – Realtime Comment Updates and Cleaner Look https://ift.tt/ms0TRYe
Show HN: Better HN – Realtime Comment Updates and Cleaner Look I'm sharing a userscript for for those who read the HN comments section a lot: 1. Updates comments without reloading the page — instantly see new ones as they appear. 2. Cleaner comment topline for less distraction — shows controls only when you hover over the topline. There is a preview gif of how it looks in the README. https://ift.tt/3K2RxLy March 14, 2026 at 12:31AM
Show HN: Loop your agents like a dandy little b*tch https://ift.tt/ND9PqjU
Show HN: Loop your agents like a dandy little b*tch Why are you reading this? Click the link, stupid. https://ift.tt/5ZwYbl9 March 13, 2026 at 11:49PM
Show HN: OpenClaw-class agents on ESP32 (and the IDE that makes it possible) https://ift.tt/3dAQwrN
Show HN: OpenClaw-class agents on ESP32 (and the IDE that makes it possible) https://pycoclaw.com/ March 13, 2026 at 12:38AM
Show HN: Every Developer in the World, Ranked https://ift.tt/D2MkXJS
Show HN: Every Developer in the World, Ranked We've indexed 5M+ GitHub users and built a ranking system that goes beyond follower counts. The idea started from frustration: GitHub is terrible for discovery. You can't answer "who are the best Python developers in Berlin?" or "who identified transformer-based models before they blew up?" without scraping everything yourself. So we did. What we built: CodeRank score - a composite reputation signal across contributions, repository impact, and community influence Tastema…
Show HN: A context-aware permission guard for Claude Code https://ift.tt/lvIGtOA
Show HN: A context-aware permission guard for Claude Code We needed something like --dangerously-skip-permissions that doesn’t nuke your untracked files, exfiltrate your keys, or install malware. Claude Code's permission system is allow-or-deny per tool, but that doesn’t really scale. Deleting some files is fine sometimes. And git checkout is sometimes not fine. Even when you curate permissions, 200 IQ Opus can find a way around it. Maintaining a deny list is a fool's errand. nah is a PreToolUse hook that classifies every tool call by …
Show HN:Conduit–Headless browser with SHA-256 hash chain - Ed25519 audit trails https://ift.tt/pRKQBbi
Show HN:Conduit–Headless browser with SHA-256 hash chain - Ed25519 audit trails I've been building AI agent tooling and kept running into the same problem: agents browse the web, take actions, fill out forms, scrape data -- and there's zero proof of what actually happened. Screenshots can be faked. Logs can be edited. If something goes wrong, you're left pointing fingers at a black box. So I built Conduit. It's a headless browser (Playwright under the hood) that records every action into a SHA-256 hash chain and signs the resul…
Show HN: Free audiobooks with synchronized text for language learning https://ift.tt/HPqCiNw
Show HN: Free audiobooks with synchronized text for language learning https://ift.tt/NJygXPU March 12, 2026 at 12:12AM
Show HN: What's my JND? – a colour guessing game https://ift.tt/1ZYVxtf
Show HN: What's my JND? – a colour guessing game https://ift.tt/UKEo71a https://ift.tt/7VmQn2f March 10, 2026 at 01:01PM
Show HN: KaraMagic – automatic karaoke video maker https://ift.tt/rsFXlSa
Show HN: KaraMagic – automatic karaoke video maker Hi all, this is an early version of a side project of mine. Would love some feedback and comments. I like karaoke and I grew up with the Asian style karaoke with the music video behind and the karaoke lyrics at the bottom. Sometimes I want to do a song and there is no karaoke version video like that. A few years ago I came across ML models that cleanly separate the vocals and the instrumental music of a song. I thought of the idea to chain together ML models that can take an input music video …
Show HN: SimpleStats – Server-side Laravel analytics, immune to ad blockers https://ift.tt/5jnaJXK
Show HN: SimpleStats – Server-side Laravel analytics, immune to ad blockers https://ift.tt/MCgOb3S March 9, 2026 at 10:15PM
Show HN: Toolkit – Visual Simulators for How Internet Protocols and Systems Work https://ift.tt/Ar59dSo
Show HN: Toolkit – Visual Simulators for How Internet Protocols and Systems Work https://ift.tt/cQ0da3N March 8, 2026 at 11:23PM
Show HN: Lobster.js – Extended Markdown with layout blocks and footnotes https://ift.tt/8IQXg0R
Show HN: Lobster.js – Extended Markdown with layout blocks and footnotes Hi HN! I built lobster.js which is an extended Markdown parser that renders directly in the browser — no build tool, no framework, no configuration. The entire setup is a single script tag: It's particularly useful for GitHub Pages sites where you want Markdown-driven content without pulling in Jekyll or Hugo. --- What makes it different from marked.js or markdown-it: Standard parsers convert Markdown to HTML — that's it. lobster.js adds layout primitives to the…
Show HN: SiClaw – Open-source AIOps with a hypothesis-driven diagnostic engine https://ift.tt/XwQkEWx
Show HN: SiClaw – Open-source AIOps with a hypothesis-driven diagnostic engine https://ift.tt/YLb58KM March 8, 2026 at 05:27AM
Show HN: Help] I run 4 AI-driven companies simultaneously from my terminal https://ift.tt/xMbR3Uw
Show HN: Help] I run 4 AI-driven companies simultaneously from my terminal https://ift.tt/rNQ60fI March 8, 2026 at 01:13AM
Show HN: MicroBin – Easy File Sharing for Everyone – Self-Hostable https://ift.tt/LAyqQbf
Show HN: MicroBin – Easy File Sharing for Everyone – Self-Hostable https://my.microbin.eu/ March 8, 2026 at 12:07AM
Show HN: Agentpng – turn agent sessions into shareable images https://ift.tt/UEk6Iw0
Show HN: Agentpng – turn agent sessions into shareable images https://ift.tt/PtkLAj7 March 8, 2026 at 01:01AM
Show HN: mTile – native macOS window tiler inspired by gTile https://ift.tt/DX5LknG
Show HN: mTile – native macOS window tiler inspired by gTile Built this with codex/claude because I missed gTile[1] from Ubuntu and couldn’t find a macOS tiler that felt good on a big ultrawide screen. Most mac options I tried were way too rigid for my workflow (fixed layouts, etc) or wanted a monthly subscription. gTile’s "pick your own grid sizes + keyboard flow" is exactly what I wanted and used for years. Still rough in places and not full parity, but very usable now and I run it daily at work (forced mac life). [1]: https://ift.…
Show HN: Mantle – Remap your Mac keyboard without editing Kanata config files https://ift.tt/zpB83CT
Show HN: Mantle – Remap your Mac keyboard without editing Kanata config files I built Mantle because I wanted homerow mods and layers on my laptop without hand writing Lisp syntax. The best keyboard remapping engine on macOS (Kanata) requires editing .kbd files which is a pain. Karabiner-Elements is easy for simple single key remapping (e.g. caps -> esc), but anything more wasn’t workin out for me. What you can do with Mantle: - Layers: hold a key to switch to a different layout (navigation, numpad, media) - Homerow mods: map Shift, Control…
Show HN: Check out my new project – SitDeck https://ift.tt/8yk6Dpc
Show HN: Check out my new project – SitDeck https://sitdeck.com March 6, 2026 at 01:03AM
Show HN: Kybernis – Prevent AI agents from executing the same action twice https://ift.tt/pqeS25n
Show HN: Kybernis – Prevent AI agents from executing the same action twice AI agents increasingly execute real system actions: issuing refunds, modifying databases, deploying infrastructure, calling external APIs. Because agents retry steps, re-plan tasks, and run asynchronously, the same action can sometimes execute more than once. In production systems this can cause duplicate payouts, repeated mutations, or inconsistent state. Kybernis is a reliability layer that sits at the execution boundary of agent systems. When an agent calls a tool: 1…
Show HN: Athena Flow – a workflow runtime for Claude Code with a terminal UI https://ift.tt/F6X4Gy1
Show HN: Athena Flow – a workflow runtime for Claude Code with a terminal UI Athena Flow is a workflow runtime that wraps Claude Code via its hooks system. It receives the event stream, applies workflow and plugin logic, and renders everything in an interactive terminal UI with a live event feed. Instead of writing throwaway prompts or one-off scripts to automate complex multi-step tasks, you define a workflow once — with prompt templates, loops, plugin bundles, and structured lifecycle hooks — and run it against any project. The first workflo…
Show HN: I put HN discussions next to the article where it belongs https://ift.tt/DbqaQIL
Show HN: I put HN discussions next to the article where it belongs It it always bugged me when I read or share an article, the discussion lives separately from the article. I imagined being able to add Google-Docs or Notion style comments on any website. We save a snapshot of the website and allow adding discussions that live side-by-side and directly reference parts of the article. HN articles are automatically indexed in https://cooo.link/hackernews and you can add any website, PDFs on https://cooo.link/ Built with SvelteKit, SingleFile(for …
Show HN: Agent Action Protocol (AAP) – MCP got us started, but is insufficient https://ift.tt/JtuWnxA
Show HN: Agent Action Protocol (AAP) – MCP got us started, but is insufficient Background: I've been working on agentic guardrails because agents act in expensive/terrible ways and something needs to be able to say "Maybe don't do that" to the agents, but guardrails are almost impossible to enforce with the current way things are built. Context: We keep running into so many problems/limitations today with MCP. It was created so that agents have context on how to act in the world, it wasn't designed to become THE standard …
Show HN: Demucs music stem separator rewritten in Rust – runs in the browser https://ift.tt/jVnxb96
Show HN: Demucs music stem separator rewritten in Rust – runs in the browser Hi HN! I reimplemented HTDemucs v4 (Meta's music source separation model) in Rust, using Burn. It splits any song into individual stems — drums, bass, vocals, guitar, piano — with no Python runtime or server involved. Try it now: https://nikhilunni.github.io/demucs-rs/ (needs a WebGPU-capable browser — Chrome/Edge work best) GitHub: https://ift.tt/0qVo8Xj It runs three ways: - In the browser — the full ML inference pipeline compiles to WASM and runs on your GPU vi…
Show HN: CrowPay – add x402 in a few lines, let AI agents pay per request https://ift.tt/XdKpgYv
Show HN: CrowPay – add x402 in a few lines, let AI agents pay per request Hey HN – I've been building in the agent payments space for a while and the biggest bottleneck I see isn't the protocol (x402 is great) — it's that most API providers have no idea how to actually integrate it. The docs exist, the middleware exists, but going from "I have a REST API" to "agents can discover and pay for my endpoints" still takes way more work than it should. CrowPay fixes that. We integrate x402 payment headers into your exi…
Show HN: Pianoterm – Run shell commands from your Piano. A Linux CLI tool https://ift.tt/mQsb69v
Show HN: Pianoterm – Run shell commands from your Piano. A Linux CLI tool A little weekend project, made so I can pause/play/rewind directly on the piano, when learning a song by ear. https://ift.tt/Av32SsY March 2, 2026 at 11:50PM
Show HN: Deploybase – Compare GPU and LLM pricing across all major providers https://ift.tt/aYntOxc
Show HN: Deploybase – Compare GPU and LLM pricing across all major providers I built a dashboard for near real-time GPU and LLM pricing across cloud and inference providers. You can view performance stats and pricing history, compare side by side, and bookmark to track any changes. Also covers MLOps tools. Would appreciate any feedback. https://deploybase.ai https://deploybase.ai March 1, 2026 at 11:32PM
Show HN: Mrkd – A native macOS Markdown viewer with iTerm2/VSCode theme import https://ift.tt/zbnasie
Show HN: Mrkd – A native macOS Markdown viewer with iTerm2/VSCode theme import Using Opus 4.6 I built a markdown viewer for macOS that uses zero web technology. No Electron, no WebView — markdown is parsed with cmark-gfm and rendered directly to NSAttributedString via TextKit 2. The result is native text selection, native accessibility, and a ~1MB binary that launches pretty much instantly. It supports GFM tables, task lists, syntax-highlighted code blocks, and inline images. You get a built-in themes (Solarized, Dracula, GitHub, Monokai) plus…
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