Ideas Lab

55FL score

Bible as RAG Database

Made this in a free evening. Index an permissive license translation of the Bible (WEB) into a RAG database to allow returning passages of similar semantic meaning. Lots of fun. For example, "more money more problems" returns Ecclesiastes 5:9-13 which, I'll just say, is spot on.."Moreover the profit of the earth is for all. The king profits from the field. He who loves silver shall not be satisfied with silver, nor he who loves abundance, with increase. This also is vanity. When goods increase, those who eat them are increased; and what advantage is there to its owner, except to feast on them with his eyes? The sleep of a laboring man is sweet, whether he eats little or much; but the abundance of the rich will not allow him to sleep. There is a grievous evil which I have seen under the sun: wealth kept by its owner to his harm."Anyway - thought it was fun enough to share. It's slow and I vibe coded it so I haven't sorted out how to make it not take 15 seconds to vector search against the full 4GB index.

Hacker News4mo agoToolAI

40FL score

OpenKnowledge – open source AI-first alternative to Obsidian/Notion

Hi HN, Nick here. We’re launching OpenKnowledge (https://openknowledge.ai/), a “what you see is what you get” markdown editor that has direct integrations with Claude, Codex, and other agents. Available as MacOS app or Web UI+CLI. Fully free/local and OSS.We built this because we wanted a Notion-like experience for writing and sharing markdown files across our team. Obsidian is the best alternative we tried, but found it doesn’t have a true WYSWIG UI and it didn’t integrate well with Claude/Codex outside of community plugins.So we built OpenKnowledge. It takes shape as:1. A MacOS app with a file navigator, the WYSIWYG editor, and link explorer.2. Integrations with the Claude, Codex, and Cursor desktop apps. The agents can open an OpenKnowledge editor within their embedded web browsers for a side-by-side experience.3. Built-in mcps, skills, and RAG for LLM-wiki and “AI Second Brain” scenarios + spec writing4. An embedded terminal and CLI for TUI-first usersOSS stack includes: Tiptap/prosemirror, CodeMirror, yjs (CRDT), Electron (MacOS app), Orama, remark/rehype/micromark/mdast, @pierre/treesOn the architecture side, the interesting eng. challenges included:1. A pipeline to convert ProseMirror to markdown in a bidirectional lossless way. ProseMirror uses ASTs, which are not designed to have byte-fidelity.2. A dual-observer CRDT to keep the ProseMirror and markdown state in-sync.The CRDT + git also power a collaborative experience that shows what Agents are doing in the markdown, have undo/redo, and version history. The “Share” and cloud-sync functionality are geared for team collaboration. They feel “no-code” but leverage git/GitHub under the hood, which also means data stays fully private.In that spirit, we made OpenKnowledge open source for anybody who’s curious or who’d like to contribute.We’re actively thinking about plugins/extensibility and what’s next. If you have suggestions or feedback, would lo

Hacker News4mo agoToolAI

Turn native language audio into flashcards and shadowing practice

Here is a tool I built initially for myself to help with my German and Greek language studies. It started as a hack for creating Anki cards from native language audio. It extracts the words, finds their base forms (lemmas) and groups the examples by the lemma. At some point I realised that I have a transcription with word level timestamps that opens a lot of other opportunities. So I added a mode to click the first and last word in the transcript and it starts looping with the right gap and repeat count.Another feature I use a lot is selecting an audio fragment, sending a predefined prompt to an AI to "explain grammar" or "explain nuances of meaning" and I still experimenting with prompts.And because shadowing is so easy I also use it as a player to improve my English pronunciation. (I am not a native English speaker.)I made a quick video showing the workflow for creating Anki cards and shadowing: https://youtu.be/TaR58uuDBvU?si=o5aGLAi2S-BZ7Zy9The app supports 15 input languages (Japanese and Chinese are the latest experimental additions), and more than 30 output languages.I would really appreciate it if you could try it https://lingochunk.com/try. I know there are other tools with similar functionality but I created something that fits my workflow and it is fun to build.Also I struggled to find public domain audio for the try page. I'd be grateful if anyone could point me to public domain sources (I used LibriVox, Wikimedia and FSI courses), or if you're a creator, let me feature some of your own recordings with credits and links.

Hacker News4mo agoToolAI

Yahoo deleted all my emails. Now what?

Logged into my old email after a year - it has everything setup with recent details, so I know for a fact it isn't more than a year. To my shock, all my data is now gone. Just a simple `fuck you` email at the top of my inbox. Is there any way to recover my old emails? Unfortunately I used to use this as my main account since the early 2000s. No shady stuff, just your average joe with an average email. Here's the only email now in my account:Dear Yahoo Mail Member,We’re so glad to see you’re back! Due to inactivity, your mailbox entered an inactive state. This means we stopped accepting your incoming emails. If your period of inactivity was long enough, we also deleted all of your emails. Now that you’ve signed back in, your mailbox has been reactivated and you will start receiving new emails again shortly. For more information, please visit the Yahoo Mail policy page at: https://en-global.help.yahoo.com/kb/mail/SLN2018.htmlWe’ve made some upgrades to your email experience since the last time you signed in. Now Yahoo Mail has a cleaner design and upgraded features to help you keep your inbox in order. Find whatever you need quickly without the clutter. Search by keyword, contact, date or any combination of these. With themes, you can pick your favourite colour and the level of intensity. The choice is yours. Stay on top of everything on the go. The top-rated Yahoo Mail app makes life easy to manage with features such as Subscriptions View. See all the mailing lists you’re subscribed to and easily unsubscribe with a single tap. You can download it here: https://mail.onelink.meWe hope that you enjoy your new Yahoo Mail experience.Thank you,The Yahoo Mail team

Hacker News4mo agoToolAI

35FL score

Gerrymandle - Daily puzzle game where you redraw electoral districts

Hacker News4mo agoToolAI

55FL score

Wordit – Change One Letter, Keep the Chain Going

Hi everyone,I got this idea for a game where, starting from a four letter word you need to go as deep as you can in your vocabulary, changing only one letter per word.bear -> beer -> peer...Each correct word gives you 1 pointEach incorrect word takes one life away from you, you start with 3

Hacker News4mo agoToolAI

55FL score

Model request: DeepSeek V4 Series

> We present a preview version of [DeepSeek-V4 series](https://huggingface.co/collections/deepseek-ai/deepseek-v4), including two strong Mixture-of-Experts (MoE) language models — DeepSeek-V4-Pro with 1.6T parameters (49B activated) and DeepSeek-V4-Flash with 284B parameters (13B activated) — both supporting a context length of one million tokens. It would be great to run DeepSeek V4 with llama.cpp!

GitHub6mo agoToolAI

70FL score

Pure Effect – Reproduce production bugs on your laptop without a DB

Hi HN,I think it's safe to say that the majority of developers don't give a second thought to writing code with I/O tangled in business logic. It's all too common to see code like: const user = findUser(email); if (!user) await saveUser(user);Now, you may ask: what's the big deal? When we write code like this, two things happen:1. It gets harder to debug production bugs. Unless you have the exact same database and remote API services to connect to, you may fail to reproduce the bug.2. You have to use mocks and fakes in your tests, or use test containers, which only help somewhat, and they are slow!To solve these issues, I built Pure Effect, a tiny TypeScript/JavaScript effect library. The core idea is simple: if a function performs I/O, it isn't pure. But if it returns a description of the I/O it wants to perform, it is. So instead of await findUser(email), you return a Command object that says, "I would like to call this function, and when it finishes, here's what to do next." Your business logic becomes a pure function. Same input, same output, every time. The database never gets touched until the interpreter (runEffect) runs.When I first started the library, I didn't expect just how far that one idea would stretch. Once your pipelines are just data, a lot of wonderful things become possible:- No need for mocking libraries. You walk the tree in tests and assert on its structure: assert.equal(flow.cmd.name, 'cmdFindUser'). Nothing is executed.- Wrap any effect with Retry(effect, { attempts: 3, delay: 200, backoff: 2 }). The configuration is plain data, so you can assert on it in tests.- Every command's input and output flows through the interpreter, so you get a full execution trace for free. You can write a simple timeTravel() function that replays it locally without touching any I/O. Perfect for debugging complex production bugs.- An onBeforeCommand hook sits between your busines

Hacker News4mo agoToolAI

peerd – AI agent harness that runs entirely in your browser

Hey HN. http://peerd.ai is an AI agent harness that lives entirely in your browser as a web extension. You don’t have to install a separate “AI browser”. You don’t have to bolt on or run some external process or manage a clunky mcp integration. It’s just a fully contained web extension, written in no build vanilla JS with minimal non-browser dependencies, using your own provider keys, and Apache 2.This isn’t just a fun hack. While it has largely been a solo side project, I genuinely believe the browser and the web could be the most natural platform for AI agents to operate safely, autonomously, and most importantly without A2A middlemen (more on that in a sec). To demonstrate that point peerd doesn’t just drive browser automation. It spins up isolated sandboxes using tabs and worker instances to support various real workload types. Those include headless JS computational work, visual JS notebooks, personal client side apps, and real Linux VMs on top of wasm with full http networking.The industry discourse over the last several months has been dominated by “which substrate is the best for ai agent sandboxes” with many competing answers focused on different models and use cases. Cloudflare is one of the most prominent examples, positioning its v8 isolate based workers as the best in class solution thanks to faster than container startup times and strong isolation guarantees. The v8 isolate is of course the product of chromium, which runs on billions of browsers around the world for free. The browser as a whole is perhaps the most battle tested sandbox system in the entire software industry. It’s been built on 3 decades of learning from hostile content, hostile code, and hostile users. Native and cloud agents are necessarily rebuilding all or most of this posture from scratch. peerd doesn’t. It leverages everything the browser has to offer and pushes it to its functional limits, while inheriting its security baseline and isolation from the host system.Robus

Hacker News4mo agoToolAI

Write SaaS apps where users control where their data is stored

Hello HN,I would like to share with you linkedrecords.com - an open source backend as a service I'm working on since some time now. You can think of it as an firebase/convex alternative with an interesting twist.In 2018 I needed to write large software requirements/architecture documents in Google Docs. While I was annoyed by the limitations of Google Docs back then (no captions on figures, no automatic heading numbering, slow when docs are bigger,...) I was still fascinated by the real time collaboration features of it. So I've started a quest to understand how it works and I begun to implement an alternative to Google Docs.I was convinced that this kind of real time collaboration is the future so I've given it much thought how I could make this as generic as possible so I could use it in all future tools I would build.In the same time I was playing around with firebase (surprisingly you can not build a google docs alternative with firebase that easy as their real time collaboration does not provide merging text but rather just JSON). And back then I was also convinced that backend as a service is the right way to go. I was thinking that one of the most important reason we were still writing custom backend code is because of authorization.I also was faced with another problem when trying to make the backend as generic as possible: relations between entities are also domain specific. E.g. A Documents can have many comments.Luckily I was intrigued by another concept back in 2018 it was called web 3.0. Back in 2018 this had nothing to do with crypto. It was used as a term to refer to the semantic web and the resource description framework as one of its standards. There are also some RDF implementations which I could have reused but they are all XML and mostly Java based. I needed something light. Instead of implementing my own RDF product I took the idea of the RDF triplestore and came up with my own interpretation of it.Using concepts like: t

Hacker News4mo agoToolAI

65FL score

LookAway, a Mac break reminder that knows when not to interrupt

Hello, I'm Kushagra and I am the indie developer behind LookAway (I've posted about it earlier but it has received quite a lot of updates since the last time so I am posting it again).LookAway is a native break reminder for macOS that doesn't interrupt. I built it because I work from home and I spend a lot of time in front of my screens. It's very easy for me to get lost in the flow and I can end up sitting for hours. Due to this, I started facing issues like eye strain and back pain by the end of the day.The solution to this was simply taking enough breaks throughout the day. But remembering to take breaks was difficult, especially when I was in the flow. I tried some reminder apps but the problem with those was that they always interrupted me at the worst moments. So I ended up not using them.LookAway is designed not to interrupt. It gives enough heads up before a break so that you're not caught off-guard. It's also context-aware and it automatically pauses when you go into a meeting, start watching a video, record screen, and much more. It even waits for you to finish typing or dictating when a break is due.One thing worth mentioning is the free iOS counterpart LookAway Mirror. When your Mac goes on a break, your iOS devices can also mirror the same break so you don't end up scrolling your phone screen during the Mac break.I've spent a lot of time in making LookAway the least annoying break reminder app and I would love to know your thoughts. It's a native Swift app so it doesn't take much resources (150MB RAM and <1% CPU when idle).It's available to download from the website (lookaway.com), Setapp, and the App Store. Thank you!

Hacker News4mo agoToolAI

70FL score

Ember, a native iOS Hacker News reader I built around accessibility

I read HN on my phone every day and never really settled on a reader, so I wrote my own and finally tidied it up enough to put out there.It's plain SwiftUI with no third-party dependencies. A few things I spent the most time on:Comments are parsed and drawn as native text instead of being dumped into a web view. Links, italics, quotes and code blocks behave like the rest of the OS, text selection works, and threads collapse instantly. The whole comment tree comes back from the Algolia API in a single request, which felt a lot nicer than walking the Firebase API node by node.Accessibility. Nothing depends on color on its own, so points, read state and selection all carry a shape or an icon too. VoiceOver reads each story as one coherent element with proper actions, Dynamic Type and Reduce Motion are respected, and there's a color-blind mode. The first-run setup actually looks at your device's accessibility settings, switches on the matching options, and tells you what it changed instead of making you hunt for them.Then the usual things you'd expect: Top/New/Best/Ask/Show/Jobs, search, saved stories, read tracking, an in-app reader, light and dark, and a handful of accent colors.It only talks to the public HN APIs, there's no account and nothing is tracked. Source and screenshots are in the repo.I'd most like feedback on the comment rendering and the accessibility choices, since those were the parts I cared about getting right. Happy to answer anything about how it's put together.

Hacker News4mo agoToolAI

TikZ Editor – WYSIWYG editor for figures in LaTeX

Hi all! TikZ is a widely-used LaTeX package for drawing figures in papers. It uses commands like \draw[->] (0,0) -- (1,2); to draw lines, shapes, text, etc. Academics usually code up their figures by hand, so there is lots of twiddling around with the coordinates and recompiling until things look nice. I guess it’s a bit like SVG, but it’s more code than markup, for example it has loops with \foreach.I built an open-source WYSIWYG TikZ editor (available for web and desktop) that allows you to edit your TikZ source code visually by dragging and resizing elements. It simultaneously shows the source code and the rendered figure, and lets you edit either one while the two views stay in sync. I’m not aware of any other editors that are simultaneously source editors and WYSIWYG (even for editing SVG or HTML), and I’m quite pleased with how well the combination works.The way the app is implemented is by parsing the TikZ code, and at all times keeping track of the exact source location of each object. Thereby, when a user drags an element to a new position, the app can override just the numbers in the coordinate without changing anything else in the code (such as line breaks or indentation).This approach essentially required reimplementing a large fraction of TikZ, which is the kind of task that no human would ever want to do. I think building software that doesn’t exist yet because it would be impossibly tedious to code up is one of the great new possibilities thanks to coding agents, and it’s worth brainstorming for other examples. (This app was built almost entirely by Codex.)Implementing the app came with lots of fun side quests, including building converters from SVG / pptx / ipe to TikZ, re-implementing the LaTeX hyphenation and line-breaking algorithm to support multi-line nodes, and making a color picker that uses the red!20!black color mixing notation used in LaTeX papers.

Hacker News4mo agoToolAI

Anthropic banned me from using Claude Code and I don't know what to do

After using Claude Code at work for months I wanted to use it on my own projects too. Most probably because my vpn was on I got banned after 1 hour of usage. I got my 120$ back. 1 month later I signed up with vpn off. But this time probably because I used the same credit cart (and that's the only card I can use) they banned me again.Even after I contacted support I got a generic "we have determined that we cannot reinstate your account at this time due to a violation of our Usage Policy" answer.I'm not using it for anything unusal. "Summarize that markdown file", "how can i refactor payment module" kind of questions mostly. I couldn't even move to real coding because 1 hour was only enough for investigation.My last chance is HN to get some visibility on my case. My Boris sees it or some other Anthropic employee.Do you guys have any tips on getting my account back?

Hacker News4mo agoToolAI

15FL score

No AI tool to filter mean or unwanted DMs on messaging apps

Users receive toxic or irrelevant direct messages and need an AI-powered filter that automatically keeps only positive interactions across apps.

X4mo agoToolAI

42FL score

Pagecast – Publish Markdown/HTML Reports to Cloudflare Pages

I built this because I kept generating HTML/Markdown reports from Claude Code/Codex and needed a permanent share link instead of a localhost tunnel. Pagecast is a local CLI that publishes those files to your own Cloudflare Pages account.It supports Markdown and HTML, stable URLs, renaming, republishing to the same URL, and watch mode for continuous updates to same file. It is MIT licensed.The main design choice is that there is no hosted Pagecast account. It uses your Cloudflare account and deploys there directly and has claude code and codex integrations as skill/hooks.Basically it can be used as a replacement for codex sites or claude artifacts

Hacker News4mo agoToolAI

Recall – Local project memory for Claude Code

Hacker News4mo agoToolAI

CleverCrow: give tokens to your favorite projects

Howdy all. I'm Zack :wave:. I've been thinking about the problem of misguided AI pull requests and figured I'd throw a possible solution out there for feedback. Basically, CleverCrow lets supporters give tokens to a GitHub repo (or set of issues in that repo) for the maintainers to use to build/fix stuff. The fun implementation challenges have been around implementing the pooling dynamics and keeping the maintainers in charge while the backers are motivated to support their work.

Hacker News4mo agoToolAI

42FL score

Pulse – Dashboard for Claude Code, approve tool calls from your phone

Hi everyone, I'm a student from Flanders and I like to use Claude Code for my purposes, ideas and also just for fun and also make solutions for problems in our world!) So that's why I built "Pulse", it's an local application that you can easily install to your device and easily follow what your claude agent is doing right now in your terminal session with an ambiance design and easily give permissions for your agent. For those who wants to see directly how much tokens you spent, and how much the session costs, and approve tool calls from everywhere from your phone and everything runs locally without an account can install Pulse from GitHub: https://github.com/nikitadoudikov/claude-pulse

Hacker News4mo agoToolAI