Show HN: DBOS Java – Postgres-Backed Durable Workflows
Hi HN - I’m Peter, here with Harry (devhawk), and we’re building DBOS Java, an open-source Java library for durable workflows, backed by Postgres.
https://github.com/dbos-inc/dbos-transact-java
Essentially, DBOS helps you write long-lived, reliable code that can survive failures, restarts, and crashes without losing state or duplicating work. As your workflows run, it checkpoints each step they take in a Postgres database. When a process stops (fails, restarts, or crashes), your program can recover from those checkpoints to restore its exact state and continue from where it left off, as if nothing happened.
In practice, this makes it easier to build reliable systems for use cases like AI agents, payments, data synchronization, or anything that takes hours, days, or weeks to complete. Rather than bolting on ad-hoc retry logic and database checkpoints, durable workflows give you one consistent model for ensuring your programs can recover from any failure from exactly where they left off.
This library contains all you need to add durable workflows to your program: there's no separate service or orchestrator or any external dependencies except Postgres. Because it's just a library, you can incrementally add it to your projects, and it works out of the box with frameworks like Spring. And because it's built on Postgres, it natively supports all the tooling you're familiar with (backups, GUIs, CLI tools) and works with any Postgres provider.
If you want to try it out, check out the quickstart:
https://docs.dbos.dev/quickstart?language=java
We'd love to hear what you think! We’ll be in the comments for the rest of the day to answer any questions.
Comments URL: https://news.ycombinator.com/item?id=45920156
Points: 62
# Comments: 35
Thu, 13 Nov 2025, 8:33 pm
Launch HN: Tweeks (YC W25) – Browser extension to deshittify the web
Hey HN! We’re Jason & Matt and we’re building Tweeks (https://tweeks.io), a browser extension that lets you modify any website in your browser to add functionality, filter/highlight, re-theme, reorganize, de-clutter, etc. If you’ve used Violentmonkey/Tampermonkey, Tweeks is like a next‑generation userscript manager. Instead of digging through selectors and hand‑writing custom JS/CSS, describe what you want in natural language and Tweeks plans + generates your edits and applies them.
The modern web is so full of clutter and junk (banners, modals, feeds, and recommendations you didn’t ask for). Even a simple google search is guarded by multiple ads, an AI overview, a trending searches module, etc. before you even see the first real blue link.
Every day there's a new Lovable-like product (make it simple to build your own website/app) or a new agentic browser (AI agents click around and browse the web for you), but we built Tweeks to serve the middle ground: most of our time spent on the web is on someone else's site (not our own), and we don't want to offload everything to an agentic browser. We want to be able to shape the entire web to our own preferences as we browse.
I spent years working on recommendation systems and relevance at Pinterest, and understand how well-meaning recommendations and A/B tests can lead to website enshittification. No one sets out to make UX worse, but optimizing for an “average” user is not the same as optimizing for each individual user.
I’ve also been hacking “page fixers” as long as I can remember: remove a login wall here, collapse cookie banners there, add missing filters/highlights (first with F12/inspect element and eventually graduated to advanced GreaseMonkey userscripts). Tweeks started as a weekend prototype that turned simple requests into page edits but unexpectedly grew into something people kept asking to share. We hope you’ll like it too!
How it works: Open the Tweeks extension, type your request (e.g. “hide cookie banners and add a price/quality score”), and submit. Upon submission, the page structure is captured, an AI agent reviews the structure, plans changes, and returns deterministic transformations (selectors, layout tweaks, styles, and small scripts) that run locally. Your modifications persist across page loads and can be enabled/disabled, modified, and shared.
Here are a bunch of one‑shot examples from early users:
Youtube: Remove Youtube Shorts. Demo: http://youtube.com/watch?v=aL7i89BdO9o. Try it yourself: http://tweeks.io/share/script/bcd8bc32b8034b79a78a8564
Hacker News: Filter posts by title/url or points/comments, modify header and text size. Demo: http://youtube.com/watch?v=cD5Ei8bMmUk. Try it yourself: http://tweeks.io/share/script/97e72c6de5c14906a1351abd (filter), http://tweeks.io/share/script/6f51f96c877a4998bda8e781 (header + text).
LinkedIn: Keep track of cool people (extracts author data and send a POST request to a server). Demo: http://youtube.com/watch?v=WDO4DRXQoTU
Reddit: Remove sidebar and add a countdown timer that shows a blocking modal when time is up. Demo: http://youtube.com/watch?v=kBIkQ9j_u94. Try it yourself: http://tweeks.io/share/script/e1daa0c5edd441dca5a150c8 (sidebar), http://tweeks.io/share/script/c321c9b6018a4221bd06fdab (timer).
New York Times Games: Add a Strands helper that finds all possible words. Demo: http://youtube.com/watch?v=hJ75jSATg3Q. Try it yourself: http://tweeks.io/share/script/7a955c910812467eaa36f569
Theming: Retheme Google to be a 1970s CLI terminal. Demo: http://youtube.com/shorts/V-CG5CbYJb4 (oops sorry a youtube short snuck back in there). Try it yourself: http://tweeks.io/share/script/8c8c0953f6984163922c4da7.
We just opened access at https://tweeks.io. It’s currently free, but each use costs tokens so we'll likely need to cap usage to prevent abuse. We're more interested in early feedback than your money, so if you manage to hit the cap, message us at contact@trynextbyte.com or https://discord.gg/WucN6wpJw2, tell us how you're using it/what features you want next, and we'll happily reset it for you.
Btw if you do anything interesting with it, feel free to make a shareable link (go to ‘Library’ and press ‘share’ after generating) and include it in the comments below. It’s fun to see the different things people are coming up with!
We're rapidly shipping improvements and would love your feedback and comments. Thanks for reading!
Comments URL: https://news.ycombinator.com/item?id=45916525
Points: 206
# Comments: 151
Thu, 13 Nov 2025, 4:03 pm
Launch HN: JSX Tool (YC F25) – A Browser Dev-Panel IDE for React
Hi HN, We’re Jamie & Dan, building JSX Tool (https://jsxtool.com) a new inspector/dev panel IDE that allows you to navigate to any line of your React project’s JSX with just a click and a command click to explore your render stack.
Demo video: https://www.youtube.com/watch?v=JIIXvN7vhrs
I’ve been writing React code for nearly a decade. Since I first saw source maps in the days of Babel and Redux, I’ve always wanted to be able to edit my code from the source maps. I’ve also always wanted to be able to inspect my JSX like it was HTML.
Last year, I found my first real use of AI was taking ad-hoc CSS changes in the Chrome element inspector, pasting them into ChatGPT, and asking for the equivalent in Tailwind. I’d then paste those changes into my React TSX files.
I wanted to streamline this process but came to the conclusion that to do so I needed to build a JSX inspector. I had to write a custom AST parser to create a mapping between the JSX and HTML. So I hacked on an inspector for a couple of months that connected JSX to the DOM in both directions.
The next feature was adding a CSS editor, like the one in the browser inspectors but for JSX. Unlike styling a piece of HTML I decided that any in memory style edits to a React fiber should be globally applied, as if you had tweaked that line of code in your codebase.
Finally, I was able to add the two AI features I really wanted: (1) prompt for in-memory styles for when I was pixel tweaking, and (2) save those temporary changes back to my codebase in the convention of the codebase I was working in.
To accomplish talking to the filesystem from the Chrome extension I built a little local server that mounts from the root of your project and allows the extension to send file-system commands back to your project root. We named this the “Dev Server”. (Note: You can fully use us as a JSX inspector without this server installed.)
After all that, I found that to convert myself as a user I needed it to be a pretty fully functional IDE. I needed vim bindings, I needed a typechecker, I needed auto-complete, I needed a linter, I needed code search and I needed a proper file explorer. Fortunately we were able to take advantage of the dev-server architecture we had stumbled onto in order to add an LSP server and Rip Grep. At this point, after months of dog fooding, I use JSX Tool for almost all of my website edits.
We’re still rough around the edges for mobile but we’re working on that.
All of the IDE stuff not involving AI is free and works fine without AI. We let you get a taste of the prompting stuff for free but apply some rate limits.
The extension itself is not open source but the dev server with the LSP is. It’s a great foundation if you want to build any sort of in-browser IDE and it's nearly React agnostic. Building the dev server was a big undertaking so I’d love to see someone fork it and find value in it.
In the future we want to start adding things that we are in a position to take advantage of over something like Cursor, such as letting AI give you code suggestions for runtime exceptions or work with the network logs. We think that the convenience of having your IDE in the dev panel gives us a leg up in convenience and workflow context.
Anyway, regardless of how you feel about AI coding, I wanted to make something that was useful with or without AI. We’d love it if you gave it a spin and we want to share anything we can about the technical side of the product that you might find interesting.
Comments URL: https://news.ycombinator.com/item?id=45903161
Points: 98
# Comments: 75
Wed, 12 Nov 2025, 5:43 pm