Open Source Rule Engine

What it does

The ultimate JSON-based rule engine that turns complex business logic into declarative configurations. Built for developers who believe code should be expressive, not repetitive. - ali-master/rule-engine

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  O'Doyle Rules – a new rules engine for Clojure2020 · github.com · ▲100

  A rules engine for Clojure(Script). Contribute to oakes/odoyle-rules development by creating an account on GitHub.

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  Agents.json – OpenAPI Specification for LLMs2025 · github.com · ▲212

  Hey HN, we’re building an open specification that lets agents discover and invoke APIs with natural language, built on the OpenAPI standard. agents.json clearly defines the contract between LLMs and API as a standard that's open, observable, and replicable. Here’s a walkthrough of how it works: https://youtu.be/kby2Wdt2Dtk?si=59xGCDy48Zzwr7ND. There’s 2 parts to this: 1. An agents.json file describes how to link API calls together into outcome-based tools for LLMs. This file sits alongside an OpenAPI file. 2. The agents.json SDK loads agents.json files as tools for an LLM that…

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  GolemUI – Declarative Form EngineJul 2026 · golemui.com · ▲53

  We're a team of three friends who have been working with forms and Open Source for a decade, and we joined forces together to create something where we can apply all of our experience. We recently released GolemUI, an Open Source library to generate forms dynamically from JSON definitions, with a typed layer to simplify authoring. This library has a lot to offer. These are the main characteristics: 1. A JSON engine. The form is governed by a JSON definition that you can store in a DB, version, diff, or generate it with LLMs as a validated JSON. 2. We provide also 28 headless components (and…

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  Klarity – Open-source tool to analyze uncertainty/entropy in LLM output2025 · github.com · ▲132

  We've open-sourced Klarity - a tool for analyzing uncertainty and decision-making in LLM token generation. It provides structured insights into how models choose tokens and where they show uncertainty. What Klarity does: - Real-time analysis of model uncertainty during generation - Dual analysis combining log probabilities and semantic understanding - Structured JSON output with actionable insights - Fully self-hostable with customizable analysis models The tool works by analyzing each step of text generation and returns a structured JSON: - uncertainty_points: array of {step, entropy,…

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  Bourbon Engine2019 · ▲91

  Build fully native UIs in JSON and push them live instantly.

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  FSET2021 · fset.app · ▲93

  A JSON Schema editor, no more writing json schema by hand

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  Run full iOS 16.5 firmware on Android Devices▲536

  Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.

  Dev tools · 6d ago · github.com

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  /dev/null▲503

  a social network for devs

  Dev tools · 9d ago · dev-null.sh

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 29d ago · openbot.run

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  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 27d ago · talanoa.email

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  myPip▲273

  Vibe code, publish, and monetize games with AI

  Dev tools · 13d ago · mypip.dev

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  Doneas▲273

  A daily accountability call with other entrepreneurs.

  Dev tools · 19d ago · doneas.com

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  YouMind▲1,223

  The first AI creation studio where learning meets writing

  AI · 2025 · youmind.com

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  A store that generates products from anything you type in search▲1,184

  The site hit #1 on HN about a year ago. Got enough traffic that I turned it into a proper API. What's there: - REST API — 35k products, manually filterable by category, free key, 60 req/min - CLI — npx anycrap random -c food - faker.js plugin — bundled, no API call, works offline - HuggingFace dataset — full 35k rows for ML/training https://anycrap.shop/developers

  AI · 2025 · anycrap.shop

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  Term.everything – Run any GUI app in the terminal▲1,094

  I made a built-from scratch Wayland Compositor to display any GUI app* in the terminal! I think there is a lot of unexplored potential in custom Wayland compositors, a lot of really cool things you can embed existing applications into! So, I started with embedding apps into the terminal because that is the easiest input/output (output is just utf-8 and I use the great `chafa` library for that, and I just read from stdin for the input). If you have any other ideas for cool Wayland compositors, let me know. I purposedly wrote 80% the app in Typescript to appeal to the most developers and…

  Dev tools · 2025 · github.com

• IR
  I recreated Windows XP as my portfolio▲1,032

  Years ago I stumbled across a basic version of this concept and it stuck with me. I knew if I was ever going to take on such a project, it would need to be flawless, but without coding experience it was just another idea that would never happen. By the end of 2024, as AI coding tools exploded everywhere, I finally had a way to make it real. I started from zero knowledge and spent months collaborating with AI agents as a learning experience. Every pixel and every function went through me. The AI translated what I asked for into code, but every decision was human. I didn't use existing OS…

  AI · 2025 · mitchivin.com

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  Ada▲910

  Your own AI data analyst

  AI · 2025 · ada.im

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  VidAU - AI Video▲868

  Turn Product Images into Scroll-Stopping Video Ads

  Growth · 2025 · vidau.ai