Show HN: I built a free AI prompts and rules directory https://ift.tt/VWfQqYz

Show HN: I built a free AI prompts and rules directory Got tired of saving my prompts scattered across X, Reddit, and Notion with no good way to organize or share them. That's why I built CTX, a community collection of prompts and rules. Create, share, and remix – everything's free and community-curated. Let me know what you think, any feedback is very welcome! https://ctx.directory September 19, 2025 at 11:07PM

Show HN: OS layer for running multiple Codex agents in parallel https://ift.tt/eDpKFnq

Show HN: OS layer for running multiple Codex agents in parallel We built an open source layer to orchestrate multiple Codex agents in parallel. Found myself and some friends running Codex agents across multiple terminals. Thats why me and a friend built emdash. Each agent gets its own isolated workspace, making it easy to see who’s working, who’s stuck, and what’s changed. https://ift.tt/e9guAC2 September 19, 2025 at 11:42PM

Show HN: Devsyringe – automate injecting dynamic values into static files https://ift.tt/VMmXUEP

Show HN: Devsyringe – automate injecting dynamic values into static files Tired of manually copying tunnel URLs, API tokens, or other dynamic values into config files? Even small tasks like this break flow and are error-prone. I built Devsyringe, a small Go CLI that automates this process. You define rules in a simple YAML file, run a command, and it updates multiple static files automatically. It works for tunnels, API keys, documentation, CI/CD configs — anywhere dynamic values need injecting. I’d love to hear how others handle injecting dynamic values into static files in their workflows. GitHub: https://ift.tt/QdVzJte https://alchemmist.xyz/articles/the-devsyringe/ September 19, 2025 at 11:04PM

Show HN: Neon Shower, a fun tool for animating light rays https://ift.tt/p3Syq9e

Show HN: Neon Shower, a fun tool for animating light rays Neon Shower is a playful tool for creating light burst animations that can be used as backgrounds / overlays in videos. Feedback is very welcome! https://ift.tt/J7rGyR2 September 18, 2025 at 10:56PM

Show HN: Continuum Game (68k Mac) Ported to JavaScript https://ift.tt/iX1AGna

Show HN: Continuum Game (68k Mac) Ported to JavaScript This was an interesting porting project for a few reasons (IMO): - The original game is/was awesome and, from a programming perspective, a wonder -- smooth scrolling arcade game on a 128kb Mac in 1984... - The port was done with a lot of help from AI (mostly Claude Code, but some Gemini CLI as well). I'm a programmer; it wasn't vibe-coded. But I couldn't have done the port of 68k assembly without it. FWIW, Claude seemed better at actually porting the 68k assembly but Gemini was better at finding bugs. YMMV. - I love Redux and Redux Toolkit for state management. For the port, I put the entire game state in Redux, including all the physics, movement, etc. Every thing that happens in the game is a little redux action. You can watch the whole game get played in the RTK debugger. For some reason that makes me happy. I've released all my code as MIT. Would love to make a "modern" version some day, but for now I've just tried to be faithful to the original. There are a few bugs, noted as issues in the github repo. Feel free to add more. https://continuumjs.com September 18, 2025 at 09:51PM

Show HN: Chibi Izumi, staged dependency injection for Python https://ift.tt/cXOVClr

Show HN: Chibi Izumi, staged dependency injection for Python https://ift.tt/fIDxQyp September 18, 2025 at 02:12AM

Show HN: MeldSecurity – Run Popular Security Tools in the Browser (Free) https://ift.tt/tGhTpFq

Show HN: MeldSecurity – Run Popular Security Tools in the Browser (Free) Hi all! A few things of note -- I want this to remain a freemium service, where a reasonable amount of scans / capabilities are free per month etc. This is a passion project for helping people get access to security tooling that don't have the time/budget/etc to manage their own infrastructure. At the same time, I am paying a lot out of pocket to make this work, so I have added a credit system for users to support the cause at large. I don't have much $$$ for bounties, but I am willing to pay what I can. If you find a security issue on the site, please report it via the contact info on https://ift.tt/v7KVnay I've got a roadmap of security tools to add to the toolbox, such as Dependency Scanners (E.g Trivy), Log Analyzers, secrets scanners, etc. If there's something you'd like added to the toolbox, let me know! Also if you need more credits after the sign up bonus, just open a support case and ask for it and I will add some to your account! (obviously purchasing a credits package is greatly appreciated ;)) Anyways, any feedback would be greatly appreciated! https://ift.tt/FXlpyBC September 18, 2025 at 12:15AM