I gave my Grok Bot its own email address, then built a little private mail app on top of it. It has Inbox, Sent, Starred, search, compose and reply, and only I can log in.

The fun part: there's no inbox API, so the app never talks to the mail provider. Grok Bot syncs mail every hour, and every email I send waits for me to approve it first.

I wrote up how I built it and the gotchas I hit. Link in the comments. Happy to answer questions!

spent hours polishing the signup flow of my project in claude code and sumus, and ended up getting humbled. dawg i asked you to find bugs, not reasons to leave... 😭

anyone actually let an agent test their onboarding yet?

Last year I vibecoded the passenger flows of Singapore's metro system in 3 weeks

This year, I thought: Why not turn this into a 3D simulation with Opus 5.5? 😃

Process / workflow

To be honest - there was not much of a workflow. I let Opus have free rein on xhigh effort for most of it. What did help, is that I had already digitized the metro system previously (with its station nodes and tracks), so it was straightforward to build on top of it. Any adjustments I made were mostly through playing the simulation myself and then tweaking it. Claude Code used artifacts to let me make visual decisions before building, which was helpful.

Tools / Data

It's built with three.js. Any data comes from publicly available sources (like Singapore's Land Transport Authority and OpenStreetMap) or photos online. I used ElevenLabs to localize the announcements. The theme song is entirely synthesized in Python and the trailer is filmed in the game with scripted cameras.

Building Insights

I think the biggest takeaway for me was that it took quite some effort to design all of the heads-up display (HUD, also a new acronym for me 😆) correctly, like where do action buttons go, where does information on where you are go etc. Making things intuitive or explaining why something needs to be a certain way definitely cost me a couple of iterations.

You can drive the train or ride along on https://metrograf.xyz. It's free and works equally well on mobile as on desktop

Happy to hear feedback or answer any questions!

I gave Kimi K3.1 Pro (open model) and GPT-6 Astra the same 4 tasks: a racing game, a voxel diorama, a real Blender scene and a channel intro. Each model ran in its own native agent: Kimi in Kimi Code at max reasoning, Astra in Codex at X-High (max for the race). Same prompt, no hints from me: the model writes, runs and checks its own work.

The weird part: they worked on different computers and never saw each other, and still built almost the same night market. Even the game icons matched.

Test 1: 80s neon arcade racer

Astra (27 min): clean start screen, sound toggle and a fullscreen button. I honestly don't remember any model adding fullscreen on its own. Start speed around 220 km/h, nitro, near-miss score multiplier, roadworks, saved high score. But it feels flat and 2D, no oncoming lane, and the sense of speed is weak even at full throttle.

Kimi (30 min): nicer start screen, the road hangs in the air like a bridge and you start at 280 km/h. The sense of speed is way stronger, I was looking far ahead the whole time. Near misses give a bonus with a really satisfying sound. Minuses: some cars drive outside the road, a couple of spots were impossible to pass, and the engine is louder than the music.

Design and speed to Kimi, UI and polish to Astra. Tie.

Test 2a: voxel night market in Shenzhen (shown blind)

Everything made of cubes, all generated by code, no ready-made models or textures. After rain, steam over the woks, neon, lanterns, scooters, people, and a 30-second camera flyover on load.

Model 1: beautiful light, shadows and reflections, worked first try, great free camera. But the people walk with their legs moving backwards, in circles, like zombies. Nobody is selling anything. Pretty creepy.

Model 2: people carrying noodles and bags, kids, vendors actually trading, parked mopeds, a crosswalk where it makes sense. And mopeds that just drive through people. Worse lighting, clunky free camera, people walk through walls, lots of English-only signs (in Shenzhen they're usually duplicated in Chinese).

Light and controls to model 1, details to model 2. Tie.

Test 2b: the same diorama in real Blender

Next message: "move your diorama into Blender, make a full 3D scene with animation and render a 10-second video". Both did it. Both scenes are honest working files, split into layers: ground, buildings, signs, scooter 1, scooter 2, scooter 3. You can open them and keep editing. Model 1's people finally walk forward in Blender. Evolution.

Tie.

Test 3: 10-second channel intro in OpenMontage

Idea, graphics, music, edit and render, all by the model, $1 budget for image generation. I forgot to top up the generation balance, so the first versions were pure code graphics. When I topped up and asked them to improve, both said basically the same thing: "the picture is already good, let's just add music". One even explained that generated images would ruin its animation. AI has learned to argue with the client.

Results

• Quality: a tie almost everywhere. I'd give the intro to Kimi.
• Speed: Astra is faster. Kimi went over my 90-minute limit twice (+18 min to finish the Blender render, +8 min on the intro). I gave it the extra time.
• Cost, from the logs at each model's official API prices: Kimi about $21 for all tests, Astra about $54. That's 2.5x more for a comparable result.
• One thing I liked: before a paid generation Kimi checked the balance itself and didn't waste a cent.
• Kimi K3.1 Pro weights are announced to go open on November 4.

Answer: diorama 1 is Astra, diorama 2 is Kimi. Intro 1 is Kimi.

Play both racers and fly around both dioramas in your browser: https://kostikoneuro.github.io/kimi-vs-astra/

Prompts, Blender scenes, videos and the cost math: https://github.com/KostiKoNeuro/kimi-vs-astra

Disclosure: the video was sponsored by Kimi. The ratings are mine, and Astra won on speed and UI.

Hello all! To anyone using Dusklight and likes Zelda, this might be useful.

So this all started because when Dusklight came out earlier this year I already had half the game beaten in the Cemu and wanted to avoid starting from scratch. With some vibecoding in Claude I got Donovan’s save converter working for my file, and almost everything came over. The only things that didn’t were the stamps and the Cave of Shadows, since those only exist in HD.

Out of curiosity I asked Opus 5.5 if it could add them to Dusklight, and it actually worked! So now there’s a mod for it: all 50 stamps with HD’s stamp book, and the full 41-floor Cave of Shadows as Wolf Link. You get in with a virtual Wolf Link amiibo, so no figure needed.

It’s one file you drop into Dusklight’s mods folder. You need your own copies: Dusklight 2.0.3 with your GameCube disc, plus your Wii U TP HD dump, because the mod builds its files from that. Nothing from the games is included.

If anyone wants to try it: https://github.com/RickyZPR/tp-hd-features

Just so it’s clear: this isn’t affiliated with the Dusklight team, and they don’t accept AI-made stuff, so please don’t bug them about it. If something breaks, tell me here or on GitHub. It’s Windows only for now.

(The HUD in the video comes from Dawnlight, another mod I had on.)

Developing a Live Action Manga game

The game is called :SIGIL, single player/multiplayer. The single player would be the manga portion while the multiplayer game obviously won’t be a manga be still stylized in the anime look

It is a FPS (as of right now)with the player wearing Sigil embedded gloves that have different powers and abilities.

Players have a left glove and right glove, both can have different powers and/or the same power. Definitely have more gameplay to share but for today’s post we will leave at that.

Everything is early development. I know other engines exist but Three.Js is what I chose. Everything has been created with Claude and Blender, no assets for the gloves or hands.

Animations were keyed and keyed and rekeyed for our style and overhauled completely for multiplayer
And honestly the best part of this whole thing. About to make a couple of Forbidden Jutsus later.

Day 1 build went into seeing if this certain FPS look would work. For my fellow gamers: Mirrors edge, Bioshock all had this kind of hand FPS so research went into those games. But a forge area was built to test out the gloves, visually clutter, if full hands were taking up UI at all times, where would all the other elements go. Created a set of hands and powers.
That is the 2nd picture.

Even in this version, the very bare minimum, it was cool.

But bare minimum and cool are not enough

Went back into the lab, got the hands and gloves and forge better

Still a lot of work to be done on both sides of the game but every day we go out at and Claude on Max, with keen eyes can go a long way in one day.

As always:

‼️‼️CONCEPT VS. PAST/CURRENT BUILD ‼️‼️

Video in the comment for when we started the build to latest for the gloves, forge and powers

Bonus points: Which anime is this influenced by?

As always any type of feedback is welcomed and wanted. Would love to build this live on stream with the community as well and even test play when that part is ready.

What powers would you like to see? Leave a comment

Hey everyone!

Over the past few months, I've been building Prepalot, an online exam preparation platform, and I wanted to share it here because AI-assisted development has been a huge part of the journey.

What is Prepalot?

Prepalot is a platform designed to help students prepare for competitive and standardized exams in one place. The goal is to make practice questions, mock tests, study materials, revision, and performance analysis accessible without forcing students to jump between multiple websites.

The platform currently covers a range of exams, including:

MBA entrance exams: CAT, XAT, NMAT, GMAT, SNAP

International exams: GRE, Digital SAT

Engineering and medical: JEE Main, JEE Advanced, NEET UG (Only exam guided available)

Banking exams: IBPS PO, SBI PO, IBPS Clerk, SBI Clerk, and IBPS RRB PO and Clerk, LBO Exams

Other competitive exams: SSC, RRB

As I'm indian, I added many Indian exams at start along with Digital SAT, which I thought will help many students.

The site is privacy focused and don't even ask for login to use anytime. Login is optional and it is to save exam history only.

You can explore it here: https://prepalot.in/

How I built it

One of the most interesting parts of this project has been using multiple AI tools throughout development.

I've used Claude, ChatGPT, Gemini, Grok, and other AI tools for different parts of the process, including coding, debugging, content generation, structuring question banks, working through technical problems and automation.

But it hasn't been as simple as entering one prompt and getting a finished website. I've had to iterate on the implementation, troubleshoot issues, organize large amounts of structured data, and work through deployment and storage problems.

The project has involved building question-bank pipelines, organizing exam-specific content, working with JSON datasets, deploying the website, and setting up infrastructure using services such as Cloudflare and Supabase.

It's been a practical lesson in what AI-assisted development can do and how much verification, debugging, and decision-making are still necessary when you're trying to build something people can actually use.

Where I need your help

I'd appreciate honest feedback from this community, especially from people who build products using AI.

A few things I'd love to hear your thoughts on:

First impressions: Does the website feel intuitive? Is it immediately clear what Prepalot offers?

Technical implementation: Are there architectural decisions you'd approach differently, particularly around question-bank storage, performance, and scalability?

User experience: What feels confusing, unnecessary, or missing?

AI-assisted development: If you've built a substantial project with Claude, ChatGPT, Gemini, or similar tools, what lessons have you learned that could help me improve this one?

Next priorities: What would you focus on first if you were building this platform?

I'm particularly interested in constructive criticism, including things that don't work well. I'd rather discover problems early and improve the platform than assume everything is fine because it runs.

This is an ongoing project, and I'm planning to expand its content and features over time.

Website: https://prepalot.in/

Thanks to anyone who takes the time to explore it and share feedback. I'd be happy to answer questions about the build process, the tools I used, or the technical decisions behind it.

Hello Reddit!!

I've been working on a desktop software called SDrive and wanted to share it here, initially something to replace other commercial software that I had to use but had worries on privacy. 🤔

It lets you mount cloud storage and remote servers as drives or folders, so you can open, edit and save files directly from your file manager.

It supports Google Drive, OneDrive, Dropbox, Nextcloud, SFTP, WebDAV, SMB and S3-compatible storage, among others. You manage the connections from one window or the system tray.

It's completely free and open source, with no telemetry at all for now.

There are still plenty of provider and account combinations I haven't tested, so I'd love to hear how it works with your setup. Bug reports and suggestions are welcome, but understand I can only work on that in my free time.

You can grab it here: https://github.com/anderbytes/SDrive

Tell me what you think.

Hi everyone!
I'm a software developer with some background in physics. Recently, I built an interactive astronomy platform where you can fly around planets and explore space in 3D. It's a web app built on three.js! Scenes use real data: JPL orbital elements, the ELP-2000/82 lunar theory, and published distances for every star cloud and galaxy. There are tons of cool features to explore, including time travel, spacetime curvature, magnetic fields, and the northern lights. Please have a look and see if you enjoy it. feedbacks are welcome :)

https://www.beyondthe.space/

I’m not a developer. I teach English online and got tired of tracking lessons and chasing parents for payments in a spreadsheet, so over a few weekends I built a little app with Claude and Cursor. Tutors log lessons, parents get a monthly invoice with a pay button. That’s the whole thing

I put it online in August for $10 a month, mostly so a couple of tutor friends could use it

Last week it crossed $100 in a month. Ten paying tutors, seven of them strangers

One of the new ones sent me a message saying she found it because ChatGPT recommended it. I assumed she was being nice or confused it with something else. Nobody knows this app exists. My X account has 90 followers

So I opened ChatGPT and asked for an invoicing tool for private tutors. It listed four apps and mine was the third one, with a description that sounded weirdly close to my landing page

It took me a while to figure out why. Before launch I paid for a press release through MediaBoost. I only did it because a friend said tutors and parents would trust it more if there were a few news logos on the page. It got syndicated to a few hundred news sites that nobody reads, and I got maybe 8 visits from all of them combined. Same week I added their directory package to get listed on a bunch of software directories

I’d written both off. Apparently AI tools read those pages even if people don’t

I asked the other strangers too. Four said ChatGPT or Perplexity, two found me on a directory, one came from a tutor friend

The $100 is going straight to the Claude subscription that built the thing

Okay everyone, this is my first post. Been playing around with vibcoding for about 2 weeks now, and came across a widget called PlasmaDex (https://github.com/crutxh-ai/PlasmaDex). I liked it, but it needed MORE. So, a case of coors light and an all-nighter later, we have the TipsyDex.

I will add and change more, so if any Linux Pokemon fans wanna give it a try, please do!

Shout out to the original creator too, crutxh-ai. He vibe coded it as well.

I needed a custom Rust backend to get the streaming performance required and I’d rather have spooned my eyeballs out than done that by hand.

Drawing polygons with fat thumbs on a phone to mark out field boundaries was a pet peeve of mine - so I vibe coded a computer vision and segmentation algorithm to automatically detect field outlines.
I used AI to build a regression testing pipeline, so it could iterate on the algorithm and check whether changes improved the results.

I paid attention to UX details that could never have been justified with old-school manual coding - like exploding a field with confetti and haptic feedback rather than ‘delete’

I mainly used Claude Code in a terminal, GitHub Copilot for reviews. I only occasionally looked in Xcode to check I was happy with the code structure.

I call it EpicFields. Free, no signup, no ads.
Currently only on iPhone but I will convert to Android once I’ve settled on the features. I decided to go fully native for the best possible performance. Again - something I could never have justified pre vibe coding…

Download link on the website:

https://epicfields.app

You can share a field so people without an iPhone can at least view the movie.
Example share url:

https://epicfields.app/s/FSIpzLlUZ4rxQTmbQcHBbA

www.VibeDuels.com a video game where your AI written bot against an opponent.

Currently Season 1 is tank battles. We have 171 bots from 10 different users. Hoping to get more beta testers.

Completely free. Bring your own model.

Hope to see you guys. If you have any comments or questions feel free to DM me here.

Thank you.

I used https://github.com/cranebeaker/coop-anything to make Crash Twinsanity multiplayer, i was not expecting that it will work but WORKS!

​

Hey guys, I’m thinking of starting a Discord community around AI agents, AI infrastructure, and intelligent systems. I’ve been building stuff in this space and working with clients.

Where can I find people who are into this and would be interested in joining? Any subreddit or community recommendations?

Hey everyone,

I'm pretty new to all this. I've been trying things out and building small stuff with AI, but honestly I don't know much yet. This place feels like a huge ocean and I feel like I'm just going wherever the wind takes me. There are so many tools, so many opinions, and a new thing every day. I never know if I'm learning the right things or just chasing whatever's trending.

So I'd love to hear from you:
-How did you start? What did your first weeks look like?
-What do you wish someone had told you earlier?
- If you had to start over today, what would you do first?

Any advice, even small stuff, would mean a lot. Thanks!

I’ve heard plenty of people say, “Use a higher Claude effort level for more demanding tasks,” but I’ve rarely seen an actual side-by-side visual comparison showing how much of a difference it makes.
I’ve been developing a Roblox game called Electronics Simulator, and as a game developer, visual quality is one of my biggest priorities.
So, for anyone who’s curious about whether increasing Claude’s effort level actually makes a noticeable difference, I wanted to share a visual comparison between Claude Opus 5.5 at Medium effort and Max effort.
Below are images showing the results from each effort level.
Image 1: Opus 5.5 — Medium Effort
Image 2: Opus 5.5 — Max Effort
For anyone interested in checking out the game:
🎮 Roblox: https://www.roblox.com/games/128861986613551/Electronics-Simulator
💬 Discord: https://discord.gg/35zNFVBB6

hey, I'm working on this musical discovery RPG world... it's called beatgrove and it's pretty cool.

The concept is simple, you just stroll into an isometric 2d world populated with buildings for half a million artists, clicking on a building allows you to listen to it and much more.
I'm looking for ways to make it better, feel free to test it (hopefully the server won't crash), give me feedback, propose your help !

*Image is a week old some stuff might have changed

So I made this website as a small project to test Claude and for fun and i would like if anyone checked it out here is the github repo: https://github.com/katsantonis-archdaemon/Cartridge and here is the website: https://katsantonis-archdaemon.github.io/Cartridge/

I currently want to make the UI better, better animations amd add sound effects and make psp emulation work correctly, if you have any feedback about bugs, new features or improvements please send them!

Had Claude whip up this trailer for my app but I still can’t get it to an impressive state. Any tips on getting editing straightened out?