Show HN: We built an agentic image editor that preserves the original structure https://ift.tt/oPR4ESC

Show HN: We built an agentic image editor that preserves the original structure Hi everyone, I’ve been experimenting with app where you can edit images in your camera roll simply by tweaking your photo’s metadata (changing location/time) and our agent will contextually regenerate the photo in that place & time in one shot. There's no prompting involved. One of the hardest problems we’ve seen with these ai image editing/creation tools is that they struggle with preserving the subjects of the original image (faces, genders, number of people, bodies, animals, etc), and I think we’ve gotten a step closer to making it feel more realistic. The gallery has some examples that people have been regenerating. https://ift.tt/7AdIWBh Here’s a demo: https://ift.tt/tgaewYk Feel free to dm me on Twitter: https://twitter.com/sakofchit if you’d like to try out the TestFlight in the meantime Would love to know what y'all think! https://ift.tt/7AdIWBh March 19, 2025 at 11:14PM

Show HN: I Made an Escape Room Themed Prompt Injection Challenge https://ift.tt/U6dxCBq

Show HN: I Made an Escape Room Themed Prompt Injection Challenge We launched an escape room-themed AI Escape Room challenge with prizes of up to $10,000 where you need to convince the escape room supervisor LLM chatbot to give you the key using prompt injection techniques. Hope you like it :) https://ift.tt/93JbQpD March 19, 2025 at 01:12AM

Show HN: I Created a Fork of Ghost CMS with an AI Editor and Native ECommerce https://ift.tt/85dmDxF

Show HN: I Created a Fork of Ghost CMS with an AI Editor and Native ECommerce After many months of hard work and innovation, we've built a platform that takes Ghost CMS to the next level. Cartanza integrates native AI-powered content and image creation and native eCommerce functionality directly into the blogging experience. This means you can now: - Generate high-quality blog content and images with AI—no more copy-pasting between tools. - Seamlessly embed eCommerce capabilities, linking products and collections directly into your blog posts. - Manage subscriptions, merchandise, and content marketing all in one place. To see Cartanza in action, check out our demo video on YouTube ( https://youtu.be/CQQDqKjOM-Y ). In the video, I walk you through our platform's key features and show how easy it is to get started with our innovative solution. We're excited to invite bloggers, content creators, and eCommerce enthusiasts to explore Cartanza. Join us as we redefine the blogging experience—where creativity meets commerce, powered by cutting-edge AI. https://cartanza.com/ March 19, 2025 at 12:27AM

Show HN: Cascii – A portable ASCII diagram builder written in vanilla JavaScript https://ift.tt/v4P95fr

Show HN: Cascii – A portable ASCII diagram builder written in vanilla JavaScript 3 months ago I wanted to draw an ASCII diagram to include in some documentation at work. I found the few tools online to be insufficient, and was suprised there wasn't a more complete tool to get the job done. Since, I've built Cascii from scratch in vanilla Javascript (I'm not an FE dev, it might be obvious...). I hope it works alright. Please check out the live version at https://cascii.app , report problems, make diagrams to improve your code's documentation. Hope you enjoy using it. https://ift.tt/mPtkY4Q March 16, 2025 at 03:32PM

Show HN: OpenTimes – Free travel times between U.S. Census geographies https://ift.tt/Tk1BSjR

Show HN: OpenTimes – Free travel times between U.S. Census geographies Hi HN! Today I'm launching OpenTimes, a free database of roughly 150 billion pre-computed, point-to-point travel times between United States Census geographies. In addition to letting you visualize travel isochrones on the homepage, OpenTimes also lets you download massive amounts of travel time data for free and with no limits. The primary goal here is to enable research and fill a gap I noticed in the open-source spatial ecosystem. Researchers (social scientists, economists, etc.) use large travel time matrices to quantify things like access to healthcare, but they often end up paying Google or Esri for the necessary data. By pre-calculating times between commonly-used research geographies (i.e. Census) and then making those times easily accessible via SQL, I hope to make large-scale accessibility research cheaper and simpler. Some technical bits that may be of interest to HN folks: - The entire OpenTimes backend is just static Parquet files on R2. There's no RDBMS or running service. The whole thing costs about $10/month to host and is free to serve. - All travel times were calculated by pre-building the inputs (OSM, OSRM networks) and then distributing the compute over hundreds of GitHub Actions jobs. - The query/SQL layer uses a setup I haven't seen before: a single DuckDB database file with views that point to static Parquet files via HTTP. Finally, the driving times are optimistic since they don't (yet) account for traffic. This is something I hope to work on in the near future. Enjoy! https://opentimes.org March 18, 2025 at 02:10AM

Show HN: A static scanner for LLM app code https://ift.tt/tLQuNJo

Show HN: A static scanner for LLM app code https://ift.tt/fBEAJLG March 17, 2025 at 11:19PM

Show HN: Cppmatch – Rust-Like Pattern Matching and Error Handling for C++ https://ift.tt/Ij2qmMV

Show HN: Cppmatch – Rust-Like Pattern Matching and Error Handling for C++ I've created cppmatch, a lightweight, header-only C++ library that brings Rust-inspired pattern matching and error handling to C++. It tries to imitate the functionality of the questionmark (?) operator in C++ by using a macro that uses the gcc extension https://ift.tt/4KglVTR This allows to create exceptionless code with non-intrusive error-as-value that unlike Exceptions, makes it clear which kinds of error a function can generate and forces you to handle (or ignore) them. The ? operator translates to *expect* To handle the errors I introduce *match* which allows to easily visit the contents of the result or any std::variant (you can use it to imitate rust enums) You can view an example of this project used in a "real way" in compiler-explorer: Simplified error types to just be a string: https://ift.tt/p2AcZEC Multiple structs as error types: https://ift.tt/NlGfV9p Feel free to give feedback or contribute to the project! https://ift.tt/8XDB7ox March 16, 2025 at 10:37PM