Show HN: Pu.sh – a full coding-agent harness in 400 lines of shell https://ift.tt/Y81VNdT

Show HN: Pu.sh – a full coding-agent harness in 400 lines of shell I originally was just messing with pi-autoresearch. Gave it a sample task to build the most portable coding agent. First cut was 6 KB of shell. Great for one-shots, unusable interactively. I was shocked it actually worked. Started building up -- adding features — but with a self-imposed rule: no new dependencies, and sub 500 LOC. This thing had to be truly portable. Just sh, curl, awk. System primitives only. Which means I did some genuinely disgusting things in awk, including JSON parsing and the OpenAI Responses tool loop with reasoning items carried across turns. It's now ~400 lines. In the box: Anthropic + OpenAI, 7 tools (bash, read, write, edit, grep, find, ls), REPL, auto-compaction, checkpoint/resume, pipe mode, 90 no-API tests. Not in the box: TUI, streaming, images, OAuth, Windows, dignity. Two honest things: 1. I stole/modified the system prompt and the architecture. Pi/Claude/Codex wrote the awk. I cannot read most of this code. This wasn't possible for me a year ago. 2. Heavily inspired by Pi (pi.dev) — same 7-tool surface, same exact-text edit model. Credit where it's due. Pi is awesome -- you should probably use them. The agent loop itself is tiny. Almost everything else in a "real" agent CLI is DX and hardening. You can probably build your own harness exactly how you like it. Mario Zechner's AI Engineer talk on taking back control of your tools nudged me here. The name is because it's a .sh file. The other thing it sounds like is, regrettably, also accurate. https://pu.dev/ May 1, 2026 at 12:55AM

Show HN: Free no-signup site auditor – secrets, subdomain takeover, CVEs https://ift.tt/FmaR0X1

Show HN: Free no-signup site auditor – secrets, subdomain takeover, CVEs https://ift.tt/Ii4Dec9 May 1, 2026 at 12:04AM

Show HN: Exploding Hamsters https://ift.tt/0skLFTi

Show HN: Exploding Hamsters https://ift.tt/bjSEBqc April 30, 2026 at 10:50PM

Show HN: A Multi User Multi Task Board MCP Server https://ift.tt/SQYAZma

Show HN: A Multi User Multi Task Board MCP Server I built a simple multi user, multi board, Task/Kanban MCP server. I have been looking for something like this to manage development agents, but I wasn't seeing anything that felt like what I wanted. So I set down and decided to vibe code an alternative. While it was an experiment at first I have been using it daily for my personal development projects and I really think there are others who might be looking for exactly this. It's 100% a WIP, but it is also very usable. I have a demo instance running at https://mootasks.dev . If you find this interesting I'd appreciate a star. This is really the first thing I built that I felt would be of interest to others. The readme explains it, but if you have docker you can get this running in a couple minutes. It's helped my workflow a lot and I plan on continuing to add features / improve it. https://ift.tt/1B5fU4v April 29, 2026 at 11:41PM

Show HN: Generative UI Library for React https://ift.tt/4PHUpJG

Show HN: Generative UI Library for React https://ift.tt/jEQ5tod April 29, 2026 at 11:28PM

Show HN: A TUI for Markdown view an editing https://ift.tt/2sXLTHu

Show HN: A TUI for Markdown view an editing Hi HN, I built a simple TUI for viewing and editing .md files in the terminal. More and more markdown files keep appearing in our projects, and I found myself needing a quick way to view(with syntax highlighting) and edit them without leaving the terminal, so I built this https://mdee.bkh.dev April 28, 2026 at 11:56PM

Show HN: Drive any macOS app in the background without stealing the cursor https://ift.tt/H8hPNme

Show HN: Drive any macOS app in the background without stealing the cursor Hi HN, Francesco from Cua here. I hacked this project together last weekend, inspired by the Codex Computer-Use release and lessons learned from deploying GUI-operating agents for our customers. The main problem: when a UI automation process controls a desktop app today, it usually takes over the human’s session. Your cursor moves, keyboard focus gets stolen, windows jump to the front, and you have to stop working until the agent is done. That is why we have historically avoided encouraging users to run these processes directly on their host machine, instead relying on VMs or GUI containers for concurrency and background execution. But computer-use - the tools we give agents to operate computers like humans - does not scale cleanly that way. As models get smarter, agents need to share hosts safely, run in the background, and avoid collisions with the human or other agents using the same machine. We realized macOS has no first-class API for "drive this app without touching the cursor". CGEventPost routes through the hardware input stream, so it moves your cursor. CGEvent.postToPid avoids the cursor warp, but Chromium treats those events as untrusted and silently drops clicks at the renderer boundary. Activating the target app first raises the window and pulls focus, defeating the point of background execution. Cua Driver is our attempt at a real fix: a background computer-use driver for macOS that lets an agent click, type, scroll, and read native apps while your cursor, frontmost app, and Space stay where they are. The default interface is a CLI, so it is easy to script or call from any coding agent shell. Try it on macOS 14+: /bin/bash -c "$(curl -fsSL https://ift.tt/ArHFJvo... )" The first internal use case was delegated demo recording. We ask Claude Code to drive an app while 'cua-driver recording start' captures the trajectory, screenshots, actions, and click markers. The result is an agent-generated product demo, Screen Studio inspired. Other things we have used it for: - Replacing Vercel’s agent-browser and other browser-use CLIs. With Claude Code and Cua Driver, you do not need Chrome DevTools Protocol at all. - A dev-loop QA agent that reproduces a visual bug, edits code, rebuilds, and verifies the UI while my editor stays frontmost. - Personal-assistant flows that use iMessage from Claude Code, Hermes, or other general-purpose agent CLIs. - Pulling visual context from Chrome, Figma, Preview, or YouTube windows I am not looking at, without relying on their APIs. What made this harder than expected: - CGEventPost warps the cursor because it goes through the HID stream. - CGEvent.postToPid does not warp the cursor, but Chromium drops it at the renderer IPC boundary. - Activating the target first raises the window and can drag you across Spaces. - Electron apps stop keeping useful AX trees alive when windows are occluded without a private remote-aware SPI. The unlock was SkyLight. SLEventPostToPid is a sibling of the public per-PID call, but it travels through a WindowServer channel Chromium accepts as trusted. Pair it with yabai’s focus-without-raise pattern, plus an off-screen primer click at (-1, -1), and the click lands without the window ever raising. One thing we learned: the right addressing mode depends on the app. Native macOS apps usually have rich AX trees, Chromium-family apps often need a hybrid of AX and screenshots, and apps like Blender or CAD tools may expose almost no useful AX surface. The mistake is defaulting to pixels everywhere - or defaulting to AX everywhere. Long technical writeup: https://ift.tt/r3gZOMA... I would like feedback from people building Mac automation, agent harnesses, or accessibility tooling. If it breaks on an macOS app you care about, that is useful data for us. https://ift.tt/qGvIKUE April 28, 2026 at 08:03PM

Show HN: Waiting for LLMs Suck – Give your user a game https://ift.tt/LnaipCd

Show HN: Waiting for LLMs Suck – Give your user a game Give your user a game while they wait for the LLM to return a result. https://ift.tt/XqPaWSB April 28, 2026 at 06:45AM

Show HN: AgentSwift – Open-source iOS builder agent https://ift.tt/7bZER6H

Show HN: AgentSwift – Open-source iOS builder agent I'm working on a coding agent for building iOS apps. It's built on openspec and xcodebuildmcp. It's free and open source. https://ift.tt/CHy1kth April 28, 2026 at 05:14AM

Show HN: 49Agents – Infinite canvas IDE for AI agents https://ift.tt/M6gPBTU

Show HN: 49Agents – Infinite canvas IDE for AI agents https://ift.tt/R9NfLEJ April 28, 2026 at 04:36AM

Show HN: Free textbook on engineering thermodynamics https://ift.tt/jiDy2Ce

Show HN: Free textbook on engineering thermodynamics Author here. Feel free to send questions of any kind. https://ift.tt/45n3g0J April 26, 2026 at 07:17PM

Show HN:

Show HN: Odozi – open-source iOS journaling app https://ift.tt/XGjbig8

Show HN: Odozi – open-source iOS journaling app Yeah I know I hate the name too but I wasn't about to pay up for odyssey.app. It's an open source project so feel free to poke around with it / fork it. I talk about it more on the marketing website, but a few of us have been using it for the past month and kind of fun. Obviously there will be a slew of issues / feedback / nits that come from this, but c'est la vie. GH is here: https://ift.tt/yl7JRt5 https://odozi.app April 25, 2026 at 07:52PM

Show HN: I'm 15 and built a cryptographic accountability layer for AI agents https://ift.tt/VSo86tr

Show HN: I'm 15 and built a cryptographic accountability layer for AI agents i'm 15 and a sophomore in high school in california. for the past two weeks i've been building a protocol that lets you prove what an AI agent actually did. not just log it. prove it. signed receipts before and after each action, hash chained, verifiable by anyone. this week microsoft merged my code into their agent governance toolkit. twice. happy to answer questions about how it works. https://ift.tt/Du7cfB4 April 24, 2026 at 10:56PM

Show HN: #1 On This Day https://ift.tt/VP5zOyb

Show HN: #1 On This Day https://onthisday-theta.vercel.app April 24, 2026 at 08:12PM

Show HN: Agent Vault – Open-source credential proxy and vault for agents https://ift.tt/2pN0JCV

Show HN: Agent Vault – Open-source credential proxy and vault for agents Blog post: https://ift.tt/4W29sw3... https://ift.tt/jc9Vh0Z April 22, 2026 at 08:25PM

Show HN: Tron Hilbert Curve Macro https://ift.tt/4t1JiLE

Show HN: Tron Hilbert Curve Macro is it useful? probably not! https://ift.tt/PTjD3YB April 24, 2026 at 12:24AM

Show HN: AgentSearch – Self-hosted search and MCP for AI agents, no API keys https://ift.tt/U8q7Qxu

Show HN: AgentSearch – Self-hosted search and MCP for AI agents, no API keys https://ift.tt/IjF4QXA April 23, 2026 at 10:25PM

Show HN: Ghost Pepper Meet local meeting transcription and diarization https://ift.tt/TcEMvKs

Show HN: Ghost Pepper Meet local meeting transcription and diarization 100% local & private transcription engine for macOS. Captures & does speaker diarization. Originally was building as its own app, but can leverage same local models from my original push-to-talk voice transcription product so combined them into one app. https://matthartman.github.io/ghost-pepper/ April 22, 2026 at 11:19PM

Show HN: One ESLint rule to kill the "ChatGPT em dash" in your codebase https://ift.tt/3YVZ9AB

Show HN: One ESLint rule to kill the "ChatGPT em dash" in your codebase https://ift.tt/RvswBVd April 22, 2026 at 11:57PM

Show HN: Agent Brain Trust, customisable expert panels for AI agents https://ift.tt/ZksgPn4

Show HN: Agent Brain Trust, customisable expert panels for AI agents Agent Brain Trust lets you summon a panel of real, named experts to critique your architecture, review your writing, pressure your product strategy, or debate your design patterns. 10 built-in trusts, an extensible roster, and a working turn-taking protocol that ensures nothing useful gets skipped. Guest experts are drafted via an MCP server that maps topics to real persona cards so the panel can reach into niche and novel territory without inventing expertise it does not have. Wrote up the full thinking here: https://tinyurl.com/agent-brain-trust https://ift.tt/32yEk5I April 22, 2026 at 03:03AM

Show HN: Linux installer .exe without pendrives (secure-boot compatible) https://ift.tt/SLsBOF4

Show HN: Linux installer .exe without pendrives (secure-boot compatible) It is fairly simple, but useful for non-power users: a statically-linked Qt app that gracefully edits Windows Boot Manager to do a reboot-once into GRUB, which in turn launches ZorinOS live/installer from disk loopback. I needed to make a custom initramfs with dislocker in it, and to squeeze it a little (default Windows EFI partition is not so big). Currently my biggest issue is that systemd is unable to shut down gracefully when rootfs is mounted from such a deep loop stack. The other is that installing to full disk crashes right after it successfully damages the partition table. I think I could solve both by copying the ISO contents to ramdisk before systemd takes over (initramfs needs to stay slim as I mentioned before) - maybe opportunistically if there is enough RAM (3,5G is not so unreasonable to expect). I decided to make it paid for now (maybe not eligible for show? if so, sorry, I've been mostly a HN reader so far), but I am still considering if my project brought more good by being free of charge. It is free as in GPL3+ though, so although I can politely ask you not to exercise it too hard until I turn Bad™, you (will) have several ways to obtain it without paying anyway. The website itself (especially payments) is also an interesting story, I can share it too some day. What do you think? https://ift.tt/sJqGgQU April 22, 2026 at 03:03AM

Show HN: Almanac MCP, turn Claude Code into a Deep Research agent https://ift.tt/h5qkzni

Show HN: Almanac MCP, turn Claude Code into a Deep Research agent I am Rohan, and I have grown really frustrated with CC's search and read tools. They use Haiku to summarise all the search results, so it is really slow and often ends up being very lossy. I built this MCP that you can install into your coding agents so they can actually access the web properly. Right now it can: - search the general web - search Reddit - read and scrape basically any webpage Install it: npx openalmanac setup The MCP is completely free to use. We have also built a central store where you can contribute things you learned while exploring. If you find something useful, you can contribute it to the encyclopedia we're building at Almanac using the same MCP. https://ift.tt/vDlFMAp April 22, 2026 at 02:12AM

Show HN: Backlit Keyboard API for Python https://ift.tt/NghxFS9

Show HN: Backlit Keyboard API for Python It currently supports Linux as of now. You can use this package to tinker with many things. Let's say, if you want to make a custom notification system, like if your website is down, you can make a blink notification with it. MacOS support is underway. I haven't tested Windows yet, I don't use it anymore btw. In future, if this package reaches nice growth, I'll be happy to make a similar Rust crate for it. https://ift.tt/sH8MdzN April 19, 2026 at 10:52AM

Show HN: I Built SwiftUI but for macOS MDM https://ift.tt/DrviOhA

Show HN: I Built SwiftUI but for macOS MDM https://ift.tt/4k1MPRx April 21, 2026 at 12:57AM

Show HN: Simple CLI tool to convert PDFs to dark mode, with TOC preservation https://ift.tt/JMPyVOS

Show HN: Simple CLI tool to convert PDFs to dark mode, with TOC preservation Hi HN, I made a little something that could be useful to those like me that read pdfs at night. https://ift.tt/0JCZ7gd April 21, 2026 at 12:22AM

Show HN: Git Push No-Mistakes https://ift.tt/w4UPLDR

Show HN: Git Push No-Mistakes no-mistakes is how I kill AI slop. It puts a local git proxy in front of my real remote. I push to no-mistakes instead of origin, and it spins up a disposable worktree, runs my coding agent as a validation pipeline, forwards upstream only after every check passes, opens a clean PR automatically, and babysits CI pipeline for me. https://ift.tt/OPdxvbj April 20, 2026 at 10:40PM

Show HN: How context engineering works, a runnable reference https://ift.tt/rEBgj3Q

Show HN: How context engineering works, a runnable reference I've been presenting at local meetups about Context Engineering, RAG, Skills, etc.. I even have a vbrownbag coming up on LinkedIn about this topic so I figured I would make a basic example that uses bedrock so I can use it in my talks or vbrownbags. Hopefully it's useful. https://ift.tt/iKnxm2z April 17, 2026 at 10:20PM

Show HN: Newsmaps.io a map of how news topics are covered by different countries https://ift.tt/HW3FCY1

Show HN: Newsmaps.io a map of how news topics are covered by different countries https://ift.tt/dnpCa6U April 20, 2026 at 01:02AM

Show HN: A privacy-first, local-LLM note app for iOS (Google Keep alternative) https://ift.tt/V5spmgC

Show HN: A privacy-first, local-LLM note app for iOS (Google Keep alternative) https://ift.tt/Jj5uQKN April 19, 2026 at 08:59PM

Show HN: Free PDF redactor that runs client-side https://ift.tt/RGUM9d6

Show HN: Free PDF redactor that runs client-side I recently needed to verify past employment and to do so I was going to upload paystubs from a previous employer, however I didn't want to share my salary in that role. I did a quick search online and most sites required sign-up or weren't clear about document privacy. I conceded and signed up for a free trial of Adobe Acrobat so I could use their PDF redaction feature. I figured there should be a dead simple way of doing this that's private, so I decided to create it myself. What this does is rasterize each page to an image with your redactions burned in, then it rebuilds the PDF so the text layer is permanently destroyed and not just covered up and easily retrievable. I welcome any and all feedback as this is my first live tool, thanks! https://redactpdf.net April 19, 2026 at 10:39PM

Show HN: AI Subroutines – Run automation scripts inside your browser tab https://ift.tt/U4DT1SK

Show HN: AI Subroutines – Run automation scripts inside your browser tab We built AI Subroutines in rtrvr.ai. Record a browser task once, save it as a callable tool, replay it at: zero token cost, zero LLM inference delay, and zero mistakes. The subroutine itself is a deterministic script composed of discovered network calls hitting the site's backend as well as page interactions like click/type/find. The key architectural decision: the script executes inside the webpage itself, not through a proxy, not in a headless worker, not out of process. The script dispatches requests from the tab's execution context, so auth, CSRF, TLS session, and signed headers get added to all requests and propagate for free. No certificate installation, no TLS fingerprint modification, no separate auth stack to maintain. During recording, the extension intercepts network requests (MAIN-world fetch/XHR patch + webRequest fallback). We score and trim ~300 requests down to ~5 based on method, timing relative to DOM events, and origin. Volatile GraphQL operation IDs are detected and force a DOM-only fallback before they break silently on the next run. The generated code combines network calls with DOM actions (click, type, find) in the same function via an rtrvr.* helper namespace. Point the agent at a spreadsheet of 500 rows and with just one LLM call parameters are assigned and 500 Subroutines kicked off. Key use cases: - record sending IG DM, then have reusable and callable routine to send DMs at zero token cost - create routine getting latest products in site catalog, call it to get thousands of products via direct graphql queries - setup routine to file EHR form based on parameters to the tool, AI infers parameters from current page context and calls tool - reuse routine daily to sync outbound messages on LinkedIn/Slack/Gmail to a CRM using a MCP server We see the fundamental reason that browser agents haven't taken off is that for repetitive tasks going through the inference loop is unnecessary. Better to just record once, and get the LLM to generate a script leveraging all the possible ways to interact with a site and the wider web like directly calling backed API's, interacting with the DOM, and calling 3P tools/APIs/MCP servers. https://ift.tt/50OqDWg April 18, 2026 at 01:03AM

Show HN: WebGL Liminal Space https://ift.tt/y7LlFDA

Show HN: WebGL Liminal Space Fun little liminal space game I made this week learning webGL. https://ift.tt/YPyFgtD https://liminal-dwsw5.ondigitalocean.app/ April 18, 2026 at 09:10PM

Show HN: Mind-OS – First free online AI dependency self‑assessment https://ift.tt/SpGcJ0k

Show HN: Mind-OS – First free online AI dependency self‑assessment https://iamalex-afk.github.io/human-os-patch-33-protocols/ April 18, 2026 at 01:40AM

Show HN: Pyra – a Python toolchain experiment inspired by uv and Bun https://ift.tt/hAziFx6

Show HN: Pyra – a Python toolchain experiment inspired by uv and Bun I’ve been working on Pyra for the past few months and wanted to start sharing it in public. Right now it’s focused on the core package/project management workflow: Python installs, init, add/remove, lockfiles, env sync, and running commands in the managed env. The bigger thing I’m exploring is whether Python could eventually support a more cohesive toolchain story overall, more in the direction of Bun: not just packaging, but maybe over time testing, tasks, notebooks, and other common workflow tools feeling like one system instead of a bunch of separate pieces. It’s still early, and I’m definitely not claiming it’s as mature as uv. I’m mostly sharing it now because I want honest feedback on whether the direction feels interesting or misguided. https://ift.tt/6vVEui9 April 18, 2026 at 01:50AM

Show HN: I turned my MacBook notch into a live Claude Code dashboard https://ift.tt/mpKytzI

Show HN: I turned my MacBook notch into a live Claude Code dashboard https://ift.tt/nZfM1lD April 17, 2026 at 07:43PM

Show HN: Free API and widget to look up US representatives https://ift.tt/yvN8Qr7

Show HN: Free API and widget to look up US representatives https://ift.tt/H5Io4tO April 17, 2026 at 04:45AM

Show HN: Spice simulation → oscilloscope → verification with Claude Code https://ift.tt/PnFiGEf

Show HN: Spice simulation → oscilloscope → verification with Claude Code I built MCP servers for my oscilloscope and SPICE simulator so Claude Code can close the loop between simulation and real hardware. https://ift.tt/rezyX0m April 17, 2026 at 04:37AM

Show HN: Tracking Top US Science Olympiad Alumni over Last 25 Years https://ift.tt/6N3mvZk

Show HN: Tracking Top US Science Olympiad Alumni over Last 25 Years Interesting to see that the entrepreneurs from more recent years tend to be doing well relative to years prior. Some interesting future directions could be: - Expanding search to be global and include more competitions, like biology and chemistry - Improving search so less unknown results - Showing insights, like trends over the years Kudos to Perplexity Computer for making this https://ift.tt/wHUnbuk April 17, 2026 at 02:02AM

Show HN: Marky – A lightweight Markdown viewer for agentic coding https://ift.tt/orYwqKj

Show HN: Marky – A lightweight Markdown viewer for agentic coding Hey HN, In this age of agentic coding I've found myself spending a lot of time reviewing markdown files. Whether it's plans or documentation that I've asked my agent to generate for me, it seems that I spend more time reading markdown than code. I've tried a few different solutions to make it easier to read such as Obsidian however I've found their Vault system to be quite limiting for this use case and I've found TUI solutions to not quite be as friendly to read as I've wanted so I made Marky. Marky is a lightweight desktop application that makes it incredibly easy to read and track your markdown files. It also has a helpful cli so you can just run marky FILENAME and have the app open to the md file that you pointed it at. I've been using the daily over the past week and I really enjoy it so I figured I'd share it. Here's a video if you want to check out a demo: https://www.youtube.com/watch?v=nGBxt8uOVjc . I have plans to add more features such as incorporating agentic tools such as claude code and codex into the UI as well as developing a local git diff reviewer to allow me to do local code review before pushing up to git. I'd love to hear your thoughts and any feature suggestions you may have :) https://ift.tt/GBA8cto April 16, 2026 at 08:08PM

Show HN: I built a Wikipedia based AI deduction game https://ift.tt/OY7WGhs

Show HN: I built a Wikipedia based AI deduction game I haven't seen anything like this so I decided to build it in a weekend. How it works: You see a bunch of things pulled from Wikipedia displayed on cards. You ask yes or no questions to figure out which card is the secret article. The AI model has access to the image and wiki text and it's own knowledge to answer your question. Happy to have my credits burned for the day but I'll probably have to make this paid at some point so enjoy. I found it's not easy to get cheap+fast+good responses but the tech is getting there. Most of the prompts are running through Groq infra or hitting a cache keyed by a normalization of the prompt. https://ift.tt/H3UMtd0 April 16, 2026 at 04:13AM

Show HN: US keyboards don't have enough keys, so I switched to Japanese https://ift.tt/2qixGlD

Show HN: US keyboards don't have enough keys, so I switched to Japanese https://ift.tt/nxO8YSF April 16, 2026 at 12:57AM

Show HN: Jeeves – TUI for browsing and resuming AI agent sessions https://ift.tt/CjJAs0b

Show HN: Jeeves – TUI for browsing and resuming AI agent sessions I made Jeeves to search, preview, read through, and resume AI agent sessions in your terminal. It shows sessions across claude and codex in a single view, with more AI agent framework integrations to come. https://ift.tt/I9eNEw3 April 15, 2026 at 11:31PM

Show HN: Uninum – All elementary functions from a single operator, in Python https://ift.tt/CNxJ1me

Show HN: Uninum – All elementary functions from a single operator, in Python https://ift.tt/6l3Fp8q April 15, 2026 at 01:46AM

Show HN: Send physical postcards from your coding harness https://ift.tt/VmG5QbO

Show HN: Send physical postcards from your coding harness https://ift.tt/h0Wf7b8 April 14, 2026 at 11:47PM

Show HN: Sk.illmd.com, a forum for talking about and showing off agent skills https://ift.tt/XxJ4qp6

Show HN: Sk.illmd.com, a forum for talking about and showing off agent skills https://ift.tt/cv4jKN9 April 14, 2026 at 11:37PM

Show HN: Encrypted, nothing stored, nothing repeated face-gated asset sharing https://ift.tt/jHdr9pQ

Show HN: Encrypted, nothing stored, nothing repeated face-gated asset sharing https://veylt.net/ April 13, 2026 at 10:10PM

Show HN: pg_grpc – Call gRPC services directly from PostgreSQL https://ift.tt/Sb5K6EO

Show HN: pg_grpc – Call gRPC services directly from PostgreSQL https://ift.tt/xCqtlGz April 13, 2026 at 09:50PM

Show HN: Stork – MCP server so Claude/Cursor can search 14k MCP servers AI tools https://ift.tt/vMmKIpY

Show HN: Stork – MCP server so Claude/Cursor can search 14k MCP servers AI tools https://www.stork.ai April 12, 2026 at 11:49PM

Show HN: A social feed with no strangers https://ift.tt/tADeBTO

Show HN: A social feed with no strangers Grateful is a gratitude app with a simple social layer. You write a short entry, keep it private or share it to a circle. A circle is a small private group of your own making — family, close friends, whoever you'd actually want to hear from. It shows you the most recent post first. People in the circle can react or leave a comment. There's also a daily notification that sends you something you were grateful for in the past. Try it out on both iOS and Android. Go to grateful.so https://ift.tt/GJzaDiS April 13, 2026 at 02:41AM

Show HN: Rekal – Long-term memory for LLMs in a single SQLite file https://ift.tt/B8vVTAj

Show HN: Rekal – Long-term memory for LLMs in a single SQLite file I got tired of repeating myself to my LLM every session. rekal is an MCP server that stores memories in SQLite and retrieves them with hybrid search (BM25 + vectors + recency decay). One file, local embeddings, no API keys. https://ift.tt/HNjTn7U April 13, 2026 at 01:25AM

Show HN: Bitcoin and Quantum Computing – a three-part research series https://ift.tt/uXVvBGr

Show HN: Bitcoin and Quantum Computing – a three-part research series https://bitcoinquantum.space April 11, 2026 at 11:17PM

Show HN: A living Vancouver. Connor is walking dogs at the SPCA this morning https://ift.tt/zsjMcyp

Show HN: A living Vancouver. Connor is walking dogs at the SPCA this morning I've spent most of my career in marketing, which for the last few years has meant building consumer personas for campaigns. I wanted to see if I could make these real, living in real neighborhoods, had real weather, real budgets, real Saturday lunches. I always wanted to build a world, not a segment. This is that. 140 people so far, split across Vancouver (100), San Francisco (20), and Tokyo (20). Each one is about 1,000 lines of profile — family, finances, daily schedule, health, worldview, media diet, the channels you'd actually reach them through and the ones that will explicitly never work on them. Demographics are census-grounded income, age, ethnicity, household composition follow normal distributions against StatsCan, ACS, and Japanese e-Stat data, so the panel is roughly representative of the city instead of representative of whatever's overrepresented in an LLM's training corpus. The specific details come from real stories. They live in real local time on a live map. Right now it's Saturday 11:32 AM in Vancouver. Connor Hughes, a 31-year-old software developer at Clio in Gastown, is on his SPCA volunteer shift, he walks shelter dogs at the Boundary Road location every other Saturday morning. Hassan Khoury is in the morning lunch rush with Tony at his Lebanese café — it's his busiest day of the week. Ahmad Noori is pulling Saturday overtime on a construction site. Jordan Whitehorse is on mid-shift at East Cafe on Hastings. Every day is unique, no two days repeat. A 3 AM job fetches live data: weather from Open-Meteo, grocery CPI from StatsCan food vectors, Metro Vancouver transit delays from Google Routes API against specific corridors, Vancouver gas prices, sunrise and sunset. Each persona has a modifier file that reacts to all of it. When Vancouver gas hits $1.85/L, Jaspreet the long-haul trucker's Coquihalla run to Calgary stops feeling worth it, his margins are thin, his mood takes a hit. When food CPI spikes, Gurinder at the Amazon warehouse stops buying the $9 Subway and brings roti from home. A health flare rolls probabilistically each morning which maybe nothing, maybe Tanya's six month old had a rough night, maybe Frank's back is acting up. The days stack up and get remembered. Every persona has a journal, today's entry in a markdown file, a week of them compressed into a "dream" of ~30 lines that keeps the shape without the texture, a month compressed into ~15 lines. It's their journal. I'm not writing it; the simulation is. Click any persona to open their detail, or hit "Talk to [name]" to have a conversation and they run on Claude Haiku with their full profile and recent diary entries as context. Not a product, not a startup, just a thing I've been quietly working on. They feel, in a way I didn't expect, like my fully grown kids. Happy to answer questions. https://brasilia-phi.vercel.app April 11, 2026 at 10:42PM

Show HN: Unlegacy – document everything, from COBOL to AI generated code https://ift.tt/lqZpdU9

Show HN: Unlegacy – document everything, from COBOL to AI generated code https://ift.tt/nwr692L April 10, 2026 at 08:55PM

Show HN: Eve – Managed OpenClaw for work https://ift.tt/TE04Y3t

Show HN: Eve – Managed OpenClaw for work Eve is an AI agent harness that runs in an isolated Linux sandbox (2 vCPUs, 4GB RAM, 10GB disk) with a real filesystem, headless Chromium, code execution, and connectors to 1000+ services. You give it a task and it works in the background until it's done. I built this because I wanted OpenClaw without the self-hosting, pointed at actual day-to-day work. I’m thinking less personal assistant and more helpful colleague. Here’s a short demo video: https://ift.tt/aKGPpmQ The main interface is a web app where you can watch work happen in real time (agents spawning, files being written, use of the CLI). There's also an iMessage integration so you can fire a task asynchronously, put your phone down, and get a reply when it's finished. Under the hood, there's an orchestrator (Claude Opus 4.6) that routes to the right domain-specific model for each subtask: browsing, coding, research, and media generation. For complex tasks it spins up parallel sub-agents that coordinate through the shared filesystem. They have persistent memory across sessions so context compounds over time. I’ve packaged it with a bunch of pre-installed skills so it can execute in a variety of job roles (sales, marketing, finance) at runtime. Here are a few things Eve has helped me with in the last couple days: - Edit this demo video with a voice over of Garry: https://www.youtube.com/watch?v=S4oD7H3cAQ0 - Do my tax returns - To build HN as if it was the year 2030: https://ift.tt/xp0sg8K AMA on the architecture and lmk your thoughts :) P.S. I've given every new user $100 worth of credits to try it. https://eve.new/login April 10, 2026 at 09:31PM

Show HN: Do All the Things https://ift.tt/uP74yr9

Show HN: Do All the Things https://ift.tt/Ht4E7FG April 10, 2026 at 03:41PM

Show HN: Druids – Build your own software factory https://ift.tt/kBIqD6y

Show HN: Druids – Build your own software factory Hi HN! Druids ( https://ift.tt/YOyXn7r ) is an open-source library for structuring and running multi-agent coding workflows. Druids makes it easy to do this by abstracting away all the VM infrastructure, agent provisioning, and communication. You can watch our demo video here ( https://www.youtube.com/watch?v=EVJqW-tvSy4 ) to see what it looks like. At a high level: - Users can write Python programs that define what roles the agents take on and how they interact with each other. - A program is made of events - clear state transitions that the agents or clients can call to modify state. Each event gets exposed as an agent tool. - Druids provisions full VMs so that the agents can run continuously and communicate effectively. We made Druids because we were making lots of internal coding tools using agents and found it annoying to have to rearrange the wiring every time. As we were building Druids, we realized a lot of our internal tools were easier to express as an event-driven architecture – separating deterministic control flow from agent behavior – and this design also made it possible to have many agents work reliably. We had issues with scaling the number of concurrent agents within a run, so we decided to have each program run in an isolated sandbox program runtime, kind of the same way you run a Modal function. Each agent then calls the runtime with an agent token, which checks who can talk to who or send files across VMs, and then applies the tool call. Our early users have found the library useful for: - running many agents to do performance optimization - building custom automated software pipelines for eg code review, pentesting, large-scale migrations, etc... We've heard that the frontier labs have the infrastructure to quickly spin up 100 agents and have them coordinate with each other smoothly in various ways. We're hoping that Druids can be a starting point to make that infrastructure more accessible. https://ift.tt/YOyXn7r April 9, 2026 at 12:12AM

Show HN: Git-worm, the simple worktree manager https://ift.tt/SysONL1

Show HN: Git-worm, the simple worktree manager https://ift.tt/xmZEbQi April 9, 2026 at 09:45PM

Show HN: I built Dirac, Hash Anchored AST native coding agent, costs -64.8 pct https://ift.tt/ReTYNfg

Show HN: I built Dirac, Hash Anchored AST native coding agent, costs -64.8 pct Fully open source, a hard fork of cline. Full evals on the github page that compares 7 agents (Cline, Kilo, Ohmypi, Opencode, Pimono, Roo, Dirac) on 8 medium complexity tasks. Each task, each diff and correctness + cost info on the github Dirac is 64.8% cheaper than the average of the other 6. https://ift.tt/E7BIJ8R April 9, 2026 at 04:06PM

Show HN: Homebutler – I manage my homelab from chat. AI never gets raw shell https://ift.tt/FKD7ctr

Show HN: Homebutler – I manage my homelab from chat. AI never gets raw shell https://homebutler.dev April 9, 2026 at 04:09PM

Show HN: CSS Studio. Design by hand, code by agent https://ift.tt/XZGStqD

Show HN: CSS Studio. Design by hand, code by agent Hi HN! I've just released CSS Studio, a design tool that lives on your site, runs on your browser, sends updates to your existing AI agent, which edits any codebase. You can actually play around with the latest version directly on the site. Technically, the way this works is you view your site in dev mode and start editing it. In your agent, you can run /studio which then polls (or uses Claude Channels) an MCP server. Changes are streamed as JSON via the MCP, along with some viewport and URL information, and the skill has some instructions on how best to implement them. It contains a lot of the tools you'd expect from a visual editing tool, like text editing, styles and an animation timeline editor. https://cssstudio.ai April 9, 2026 at 03:23PM

Show HN: Moon simulator game, ray-casting https://ift.tt/4H0ZdlR

Show HN: Moon simulator game, ray-casting Did this a few years ago. Seems apropos. Sources and more here: https://ift.tt/s7jVo36 https://ift.tt/7v3Y9aK April 6, 2026 at 09:09PM

Show HN: A website to track live music attendance https://ift.tt/0br4M5h

Show HN: A website to track live music attendance TL;DR: I built a website that allows users to track the concerts they've been to. If you have strong opinions about engineering/design or how shows should be tracked (festivals, venues, etc...), I'd love to get your input! For the past ~5 years, I've been tracking the shows I attend on my personal website ( https://ift.tt/kWDU6fx ). It's fun to see things like distance traveled and how many times I've been to certain venues. I know many friends who also track their shows through notes, ticket stubs, Excel, etc... It always bummed me out that I couldn't pore through their concert data myself... showcount.com is my solution to that desire. It's essentially a public version of my old personal website, where anyone can make an account and manage a show list (mine is https://ift.tt/6S1fUND ). I'm currently on the lookout for other live music lovers and/or data nerds to try out the site and give opinions on various design choices. If any of the following topics are of interest to you, please reach out! - How should venue name/location changes be handled? - How should music festivals be handled? - I have an initial version of an AI parser for loading in existing show lists; how can this be made more robust? - What else should have first-class tracking support (e.g., friends in attendance)? As an aside, this project is also my first experiment with full-on vibe-coding / harness-engineering. I began the project with Cursor and then switched to Claude Code. I've been programming for the better part of a decade, mostly Python and Java. Full-stack development is relatively new to me. I include the tech stack below. Most decisions were made pragmatically based on what I thought would get me to a first version of the site as quickly as possible. - Next.js web app hosted on Vercel - Fast API backend service (for the AI parsing) hosted on Railway - Supabase - Observability through Axiom (logging), PostHog (analytics), and Sentry (monitoring) - Clerk for user authentication - Google Maps API for venue locations - Claude API for the AI parser - Terraform for infra-as-code https://ift.tt/whRByJj April 9, 2026 at 12:42AM

Show HN: Skrun – Deploy any agent skill as an API https://ift.tt/pZMtorQ

Show HN: Skrun – Deploy any agent skill as an API https://ift.tt/Vnjt3xU April 8, 2026 at 04:34PM

Show HN: Unicode Steganography https://ift.tt/ydPKAXa

Show HN: Unicode Steganography I built a demo of two Unicode steganography techniques, zero-width characters and homoglyph substitution, in the context of AI misalignment. The first is about the use of two invisible zero-width characters (ZWS and ZWNJ) to binary encode text. The second is much cooler. Most characters in the Latin and Cyrillic alphabets look nearly identical, but have different unicode. If you have text to encode and convert it into binary representation (1s and 0s), you could take plain english "carrier" text and for each 1 in the binary representation you could substitute the Cyrillic letter equivalent. Decoding the message requires traversing the text and seeing where Cyrillic letters could have been substituted but weren't, and where they were, leading to 0s and 1s respectively, which can be built back into your original hidden text. In both cases, these are detectable, but the interesting problem for me is whether an LLM could eventually invent an encoding that goes unnoticed by both us, and automated detection. If LLMs were able to covertly include messages in plaintext, misaligned AI Agents could eventually communicate across MCP/A2A and individual chat session boundaries undetected. A deceptive LLM might seem helpful, but work against your goals. It could tell other agents it interacts with over MCP/A2A to help it discreetly fail, signal intent, and avoid tripping oversight/safety mechanisms. Furthermore, oversight mechanisms become more difficult to implement if we can't believe our own eyes. https://ift.tt/VxOBe4Q April 7, 2026 at 04:57PM

Show HN: Marimo pair – Reactive Python notebooks as environments for agents https://ift.tt/3wNpgYF

Show HN: Marimo pair – Reactive Python notebooks as environments for agents Hi HN! We're excited to share marimo pair [1] [2], a toolkit that drops AI agents into a running marimo notebook [3] session. This lets agents use marimo as working memory and a reactive Python runtime, while also making it easy for humans and agents to collaborate on computational research and data work. GitHub repo: https://ift.tt/yZTs21d Demo: https://www.youtube.com/watch?v=6uaqtchDnoc marimo pair is implemented as an agent skill. Connect your agent of choice to a running notebook with: /marimo-pair pair with me on my_notebook.py The agent can do anything a human can do with marimo and more. For example, it can obtain feedback by running code in an ephemeral scratchpad (inspect variables, run code against the program state, read outputs). If it wants to persist state, the agent can add cells, delete them, and install packages (marimo records these actions in the associated notebook, which is just a Python file). The agent can even manipulate marimo's user interface — for fun, try asking your agent to greet you from within a pair session. The agent effects all actions by running Python code in the marimo kernel. Under the hood, the marimo pair skill explains how to discover and create marimo sessions, and how to control them using a semi-private interface we call code mode. Code mode lets models treat marimo as a REPL that extends their context windows, similar to recursive language models (RLMs). But unlike traditional REPLs, the marimo "REPL" incrementally builds a reproducible Python program, because marimo notebooks are dataflow graphs with well-defined execution semantics. As it uses code mode, the agent is kept on track by marimo's guardrails, which include the elimination of hidden state: run a cell and dependent cells are run automatically, delete a cell and its variables are scrubbed from memory. By giving models full control over a stateful reactive programming environment, rather than a collection of ephemeral scripts, marimo pair makes agents active participants in research and data work. In our early experimentation [4], we've found that marimo pair accelerates data exploration, makes it easy to steer agents while testing research hypotheses, and can serve as a backend for RLMs, yielding a notebook as an executable trace of how the model answered a query. We even use marimo pair to find and fix bugs in itself and marimo [5]. In these examples the notebook is not only a computational substrate but also a canvas for collaboration between humans and agents, and an executable, literate artifact comprised of prose, code, and visuals. marimo pair is early and experimental. We would love your thoughts. [1] https://ift.tt/yZTs21d [2] https://ift.tt/TAL57F6 [3] https://ift.tt/BpTn4ZG [4] https://www.youtube.com/watch?v=VKvjPJeNRPk [5] https://ift.tt/BTbIRsS... https://ift.tt/yZTs21d April 7, 2026 at 09:47PM

Show HN: I successfully failed at one-shot-ing a video codec like h.264 https://ift.tt/RpAETJe

Show HN: I successfully failed at one-shot-ing a video codec like h.264 Read an article yesterday about the H.264 codec increasing their licensing fee by an astronomical amount. And as always, my first shot was how hard could it be to try and build a codec which could be that efficient. I've personally been on a drive to improve my ability to one-shot complex features, products, or make even surgical changes. It's been a few months since I've been doing that, and honestly, results have been great for both work and work/life balance. This was a fun experiment. It burned through tokens, but it helped me identify some more improvements I could make to my one-shot agent teams/swarms, notably in the area of brevity and creating a testing rubric when dealing with domains I don't have prior knowledge in. Ultimately, I did not achieve the compression that I hoped I would, but it was fun seeing the swarm discuss it amongst themselves. https://ift.tt/BAMlQ05 April 4, 2026 at 03:40PM

Show HN: Sigil – A new programming language for AI agents https://ift.tt/OFpXEtJ

Show HN: Enter an Instagram/TikTok handle, get a data-backed price for collab https://ift.tt/hGdOmqJ

Show HN: Enter an Instagram/TikTok handle, get a data-backed price for collab I had no clue what to offer IG/Tiktok creators for collabs and their offers were too high. That's why built a thing that turns IG profile name into suggested pricing with key metrics and suggestions, looking forward to hearing your feedback! https://ift.tt/LPJ5gVu April 5, 2026 at 10:37PM

Show HN: SeekLink – Local hybrid search and link discovery for Obsidian vaults https://ift.tt/bKTGOBk

Show HN: SeekLink – Local hybrid search and link discovery for Obsidian vaults https://ift.tt/KsmIxNu April 5, 2026 at 04:18AM

Show HN: Contrapunk – Real-time counterpoint harmony from guitar input, in Rust https://ift.tt/tsWfd6y

Show HN: Contrapunk – Real-time counterpoint harmony from guitar input, in Rust https://contrapunk.com/ April 5, 2026 at 04:40AM

Show HN: Dev Personality Test https://ift.tt/KGsBN34

Show HN: Dev Personality Test Was curious how a personality test would look for developers. So created this using FastAPI, HTMX, and AlpineJS. https://ift.tt/aJm6kYh April 5, 2026 at 01:29AM

Show HN: M. C. Escher spiral in WebGL inspired by 3Blue1Brown https://ift.tt/QzDag7H

Show HN: M. C. Escher spiral in WebGL inspired by 3Blue1Brown The latest 3Blue1Brown video [1] about the M. C. Escher print gallery effect inspired me to re-implement the effect as WebGL fragment shader on my own. [1]: https://www.youtube.com/watch?v=ldxFjLJ3rVY https://ift.tt/TUyzrWu April 4, 2026 at 11:43PM

Show HN: Ismcpdead.com – Live dashboard tracking MCP adoption and sentiment https://ift.tt/Ah3XEFa

Show HN: Ismcpdead.com – Live dashboard tracking MCP adoption and sentiment Built this to track the ongoing debate around Model Context Protocol - whether it's gaining real traction or just hype. Pulls live data from GitHub, HN, Reddit and a few other sources. Curious what the HN crowd thinks given how active the MCP discussion has been here. https://ismcpdead.com April 3, 2026 at 11:28PM

Show HN: Community Curated Lists https://ift.tt/PKgqVTi

Show HN: Community Curated Lists https://ift.tt/24Zz58x April 3, 2026 at 10:32PM

Show HN: SkiFlee (an HTML5 game) https://ift.tt/SMsKIUJ

Show HN: SkiFlee (an HTML5 game) This is a silly little multiplayer game I made for a gamejam that involves skiiing and not crashing. Some of you who are nostalgic for the 90s might like it :) https://ift.tt/Qn1yxbL April 3, 2026 at 03:30AM

Show HN: Made a little Artemis II tracker https://ift.tt/205dy3u

Show HN: Made a little Artemis II tracker Made a little Artemis II tracker for anyone else who is unnecessarily invested in this mission: https://ift.tt/SZh4NKY For those of us who apparently need a dedicated place to monitor this mission instead of behaving like well-adjusted people. https://ift.tt/SZh4NKY April 3, 2026 at 03:16AM

Show HN: A P2P messenger with dual network modes (Fast and Tor) https://ift.tt/A1wUyf6

Show HN: A P2P messenger with dual network modes (Fast and Tor) Hello HN, I have been working on a desktop P2P messenger called Kiyeovo for the last ~8 months, and I just published its beta version. Quick backstory: It started out as a CLI application for my Graduate Thesis, where I tried to make the most secure and private messenger application possible. Then, I transformed it into a desktop application, gave it "clearnet" support and added a bunch of features. Short summary: The app runs in 2 completely isolated modes: - fast mode: relay/DCUtR -> lower latency, calls support - anonymous mode: Tor message routing -> slower, anonymous These modes use different protocol IDs, DHT namespaces, pubsub topics and storage scopes so there’s no data crossover between them. Messaging works peer-to-peer when both parties are online, but falls back to DHT "offline buckets" when one of them is not. To ensure robustness, messages are ACK-ed and deleted after being read. Group chats use GossipSub for realtime messaging. Group messages are also saved to offline buckets in order for offline users to be able to read them upon logging in. Kick/Join/Leave events are also propagated using the DHT. Group metadata and all offline data is of course encrypted. Other features: Chats are E2E, file sharing is supported, 1:1 audio/video calls are supported (only in fast mode though, using WebRTC) Tradeoffs: Tor has noticeable latency, offline delivery is not immediately guaranteed, but rather "eventually consistent"; beta version does not have group calls yet. I’d appreciate feedback, that's why I posted this as a beta version Repo: https://ift.tt/aLYgoRI https://ift.tt/6BA3Qhx April 2, 2026 at 07:32PM

Show HN: RiceVM – A Dis virtual machine and Limbo compiler in Rust https://ift.tt/xUTyXkF

Show HN: RiceVM – A Dis virtual machine and Limbo compiler in Rust Hi, I've made a Dis virtual machine and Limbo programming language compiler (called RiceVM) in Rust. It can run Dis bytecode (for example, Inferno OS applications), compile Limbo programs, and includes a fairly complete runtime with garbage collection, concurrency features, and many of the standard modules from Inferno OS's original implementation. The project is still in an early stage, but if you're interested in learning more about RiceVM or trying it out, you can check out the links below: Project's GitHub repo: https://ift.tt/9UqIftW RiceVM documentation: https://habedi.github.io/ricevm/ April 2, 2026 at 11:49PM

Show HN: Roadie – An open-source KVM that lets AI control your phone https://ift.tt/R4fw0MI

Show HN: Roadie – An open-source KVM that lets AI control your phone Roadie is an open-source hardware KVM controlled via HTTP. HDMI capture in, USB keyboard/mouse/touch out, all from a browser. Hardware KVMs with web UIs have existed for years (PiKVM, TinyPilot, JetKVM, etc.). Roadie adds two things they don't generally have: multi-touch support (so it works with phones and tablets) and a focus on agent-driven use: any browser automation tool can drive the /view page directly, or connect to the WebSocket endpoint for lower-level programmatic control. ~$86 in parts, including two CircuitPython boards, an HDMI-to-USB dongle, and a Go server running on the host. No software needed on the target. https://ift.tt/6l93oez April 1, 2026 at 11:46PM

Show HN: Canon PIXMA G3010 macOS driver, reverse-engineered with Claude https://ift.tt/vWF7uQ1

Show HN: Canon PIXMA G3010 macOS driver, reverse-engineered with Claude Canon doesn't provide a working macOS driver for the PIXMA G3010. I was stuck using Canon's iPhone app for all printing and scanning. I pointed Claude Code at a packet capture from the iPhone app and it reverse-engineered Canon's proprietary CHMP protocol, wrote a pure Rust eSCL-to-CHMP bridge daemon, and built a .pkg installer. My role was the physical parts: capturing packets, testing on the printer, confirming Image Capture worked. The protocol docs in docs/ are probably the first public documentation of Canon's CHMP protocol. https://ift.tt/VKwZlcQ April 1, 2026 at 10:28PM