
Playground — Fabraix
Test your prompt injection skills against AI agents in an interactive competitive challenge.
ibrahim_abdu777 · HN
We are giving away $100K > over the next 12 months to hack AI agents
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Test your prompt injection skills against AI agents in an interactive competitive challenge.
ibrahim_abdu777 · HN
We are giving away $100K > over the next 12 months to hack AI agents


Play and create music from audio clips, hummed melodies, or voice input.
@HappyMonkeyAI · X
Been building so many cool things recently, like Riffly 🎸Hear something cool? Play it in seconds. 📷Drop in a clip, hum a melody, or use your mic. 📷

Turn the live Bitcoin network into generative music and visual landscapes.
@SpotKolours · X
I made this little experience. I'm not a developer or musician, just a chill ,creative ,South African dude that had an idea. Proof of Sound —Hear and experience the Bitcoin network live: #Bitcoin #ProofOfSound #lofi made with @claude and @OpenAI

Discover and play songs on a competitive music chart that ranks by visitor engagement.
@SongOnTopMusic · X
SONG ON TOP is not a streaming platform. It sells one thing, clearly: a visible public position in a music chart. No fake promises. No hidden voting. One #1.

Enter a presence-based digital ecosystem with AI agents, music, and shared community experience.
@EllistriponX · X

Master WAV tracks online in under a minute, then build reverb impulse responses, bass one-shots, drum samples and more with BitKrunch's browser-based audio DSP toolkit. No install
@mstrdbybitkr · X

SoundInked turns audio into accurate, searchable text — upload files or transcribe live, translate with natural text-to-speech, and work with AI voice tools.
@Khal_Kira · X
Hey 👋 I'd love the feedback. Just shipped a Facebook Page connector — lets you wire your AI assistant to answer DMs 24/7 (same assistant you can already drop on your website). Bring-your-own FB app, ~5 min setup, no Meta review. 📷

Create and explore music on an AI-built platform.
@oyzhouzhou · X
我用kimi K3一小时做了一个音乐网站

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

Explore guitar scales, chords, and intervals on an interactive fretboard.
@PLaclede62953 · X
I’m a full-time developer, father, hobby guitarist, and regular church musician. FretFlow is the practice tool I wanted: quick fretboard visualization without jumping between tabs, charts, and theory sites. #GuitarPractice #WorshipGuitar #BuildInPublic

Stream and discover music from independent artists in a modern music community.
@OM_BooyakaMix · X
Check out what I just built with Lovable!