
Poof Preview App
Interactive creation built with Poof during Hack4Futo vibe coding competition.
@Sonnisbethel · X
Hey guys, here’s my build for the @Hack4Futo vibe coding track 2026 using @poofnew as my build engine.
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Interactive creation built with Poof during Hack4Futo vibe coding competition.
@Sonnisbethel · X
Hey guys, here’s my build for the @Hack4Futo vibe coding track 2026 using @poofnew as my build engine.

An FPS game built as a parent-friendly alternative to Roblox.
davitb · HN
I'm a father of two, 7 and 12. They are obsessed with Roblox, especially Rivals. Like a lot of parents, we did not love it. We tried the usual things: block it, limit it, set timers." It became a daily battle, a lose-lose situation. So I flipped the problem. Instead of fighting what they loved, I decided to lean into it, but with a twist. Why just play an FPS when you could build one together? My kids became the PMs. Claude and I became their engineer. I was shocked by how fast we moved. We picked a name, Cooked and started building. Get in. Lock in. Get cooked! In the first 3 hours, we had an actual FPS we could play together in the browser. Next day I invited my friend's two kids over. Suddenly, I had four PMs. We had 3 laptops, 1 iPad and 1 iPhone. So in 30mins we added mobile support and could play all 5 together. The kids would ask for features: "Can we have a rocket launcher that knocks people off the map?" "The knife should stab faster when you hold it." I know al

Generate a circular avatar from any photo with automatic background removal in the browser.
@appsbywill · X
i've been playing around with this profile picture maker, I really want to fine tune the background removal and add more styling templates. Let me know if you find more bugs!

Collect user feedback and communicate via embeddable live chat widget.
@haukejung · X
Your app for collect and triage user feedback

Scans live web apps for security vulnerabilities like exposed keys and open databases in 60 seconds.
@guhanvenkaty · X
Tako's free preview is live: Paste your URL, get a security verdict on your vibe-coded app in 60s. Not an AI wrapper: it fires real requests and PROVES exposure, pulling data from your open DB with no login. Scanning puts you on the early-access waitlist.

Paste your SaaS URL and get feedback from AI personas trained on indie hackers' advice.
roozka10 · HN
make this about validating we trained each shark using their real advice, tweets, and how they publicly validate ideas so when you pitch, it actually feels like them roasting you not just a generic AI response Here you go: we trained each shark using their real tweets and advice on how they validate ideas so when you pitch your idea it actually feels like getting feedback from them not just a generic AI telling you "great idea" Short, clear, accurate so should i qoute the first post or reply for this Quote your first post for this one. This way: new people who see the quote will click the original tweet to understand what it is it brings fresh eyes back to your main post every time each quote tweet acts like a new post in the feed So the order is: First post — the main one you already posted Quote that post — with the "we trained each shark" tweet Quote that post — with how each shark thinks (marc asks MRR, pieter says ship faster etc) Quote that post — with the early access l

Practice prompt injection attacks against an AI agent across 10 levels.
Getchowned · HN
The AI Lethal Trifecta

Browse and discover Substacks that were submitted to Hacker News.
cartucho1 · HN
I made an HN clone that lists only Substacks posted here. - Why? Over the years, I've discovered some great blogs here, so I thought it would be nice to have a filter for them. - Why only Substacks then and not blogs more generally? Because it's easy to query for "substack.com" in the public HN Algolia API (see below). Plus, hnblogs was already taken :) - What about substacks on custom domains then? At the bottom of the page there is a form to submit a custom domain. The site attempts to auto-validate that it is a Substack. If that fails, it is marked for manual review (which I'll do every once in a while). Approved ones will be included in the results. - How? I use HN's Algolia API to fetch substack stories by searching for "substack.com" in the url. I do this via a CloudFlare worker that has 3 separate cron triggers: (1) fetches new stories every 10 minutes and saves them in a KV store. (2) runs 2 minutes after the first, computes hot stories from new ones by simulating HN's scor

Generate AI images from text using GPT-4o and Gemini technology.
4oimage — 文生图网站,基于 Gemini 和 GPT4o

Paste a public GitHub repo and get an honest A–F security grade in seconds.
u/DistinctPicture4660 · Reddit
I built a security scanner that checks every GitHub push and tells AI exactly how to fix the issues Hello, As a developer, I ship a lot of code with Claude Code, and I've used pretty much every security scanner out there. Most of them are great at telling you what's wrong. Then they leave you with a long report, and you're back to copying logs into Claude or Cursor, asking your AI to figure out how to fix everything. I wanted something that fit the way many of us build software today.

Extract timestamped transcripts from YouTube videos instantly, no login needed.
@BansalSamy87003 · X
I am 14 year old

Browse AI-curated book summaries from Hacker News recommendations for engineers and tech professionals.
xxbondsxx · HN
Hacker News book recs as study guides