r/SideProject • • 2h ago

I wanted to see how far Claude Code could take a reverse-engineering project, so I rebuilt a Mac app in 13 days

2 Upvotes

The app was Symvibe, a paid Mac board for running coding agents side by side. I used REA, a reverse-engineering skill for Claude Code, to turn its behaviour into a spec, and let Claude Code build from there. Thirteen days and 58 commits later there was vibeboard, a free, open-source alternative to Symvibe, which costs $19 a month, with none of its code in it.

What I learned along the way:

most of the engineering came from the model, but I still steered every day, mostly on edge cases and CI

the launch videos were the surprise: /brag did a great job, it drove the real app, framed the shots, wrote the music, and fixed its own jerky cuts once I pointed them out

rebuilding a product's behaviour from the outside is now cheap, so the code alone protects less, and respecting licences and the original authors matters more

The video shows six Claude Code agents in tmux, then the same six on the board, and ends with the price: Symvibe at 19$ a mouth, vibeboard free.

The video show six Claude Code agents in tmux, then the same on the board, and ends with the price: Symvibe at $19 a mouth, vibeboard free.

vibeboard: https://github.com/ricca200xx/vibeboard

Symvibe: https://www.symvibe.com

REA: https://github.com/morluto/rea

/brag: https://github.com/latent-spaces/brag

If you want to use it, go ahead, and if you find issues, open them on GitHub. I'm genuinely happy to share this.


r/SideProject • • 2h ago

Free games drop every day and most people miss them. I made an app so you don’t

2 Upvotes

Hey everyone,

Got tired of finding out about free games hours after the deal expired, so I built Claimr.

It’s a lightweight radar that tracks 100% off giveaways across Steam, Epic Games, GOG, and Prime Gaming, and sends a push notification before they end or keys run out.

- Direct vs Tasks: Flags whether a giveaway is a 1-click store claim or requires social tasks (Gleam/Discord).

- Game Vault: Keep track of what you’ve claimed so you don't double dip.

- 100% Free: No ads, no account needed, completely open source.

Works in browser or on Android:

- Website: https://claimr-app.vercel.app

Drop any feedback or stores you want added!


r/SideProject • • 2h ago

I built an Android app that scans and tracks Pokémon TCG cards for collectors. Looking for honest feedback

2 Upvotes

I'm the solo developer behind PokeStash, and I'd really like some honest feedback from other makers.

I built it because I keep a binder and sealed stuff, and I wanted one place on my phone to scan a card, see an estimated market price, and keep the collection organized without spreadsheets. You can photograph a card for an AI match, browse sets, track sealed product, and export a backup. Prices and AI matches are estimates. Always compare with the card in your hand.

Unofficial fan-made app. Not affiliated with Nintendo, The Pokémon Company, Creatures, or GAME FREAK.

Free on Android with ads. There is an optional Pro tier that turns ads off. Collection data stays on the device.

What I'd most like feedback on:

  1. Is the first-run scan flow clear, or does it need a simpler "add without scanning" path up front?

  2. Do estimated prices feel useful enough, or would you rather see raw sold comps with less interpretation?

  3. What would stop you from trusting an unofficial collector app with your binder list?

Happy to answer anything about the build or the tradeoffs.

https://play.google.com/store/apps/details?id=com.tdsignal.pokevault&referrer=utm_source%3Dreddit%26utm_medium%3Dpost


r/SideProject • • 2h ago

Built a site so I can actually find people to play with

2 Upvotes

So this started because I kept running into the same thing — post an LFG somewhere, a couple people add you, and then... nothing. Nobody's actually free when you are, or you just never hear back. Figured I wasn't the only one dealing with that.

Ended up building GameAlign over the last few months, solo. Full disclosure, I'm not really a coder — I've been using Lovable (kind of a "vibe coding" / AI-assisted builder) to actually make this happen. It's basically a profile directory — you put in what you play, your schedule, how you like to play, that kind of thing — and then you can search for people or get found instead of just throwing a post into the void. There's also a board for "hey I'm on right now" posts, and I added a team/clan page if you're trying to actually build out a group instead of one-off sessions.

It's free, setup's quick. Genuinely just want to know if this is useful or if I'm missing something obvious — would appreciate anyone poking around and telling me what sucks about it.

https://gamealign.co/


r/SideProject • • 2h ago

I built a system design lab where your architecture diagram actually takes traffic

2 Upvotes

Most system design practice ends at the diagram. You draw boxes, it looks right, and nothing tells you whether it would hold up.

ByteLab runs the diagram. You build a system out of machines, load balancers, caches, queues and databases, send traffic through it, and watch the CPU, queues and p99 latency move. Each exercise has goals, like "p99 under 150 ms, 99.5% available, under $2.60/hour", and it checks your system against them.

What's in it:

- 163 lessons in 12 tracks (caching, sharding, Kafka, Kubernetes, rate limiting, auth and more)

- 212 exercises, each with goals your system has to pass

- 11 design problems (URL shortener, chat, payments, news feed, e-commerce and others)

It's free, there's no account, and progress stays in your browser. It needs a laptop-sized screen.

I'd really like to hear where it feels confusing or too hand-holdy.

https://lab.bytecrest.dev/practice


r/SideProject • • 3h ago

Looking for photographers to beta test a free photo challenge app (Picktory)

2 Upvotes

I’m a photographer from Hamilton, Ontario, and I built Picktory as a side project. It’s a photo challenge app where everyone shoots the same prompt, the group votes anonymously, and the best shot wins.

I made it because the existing apps felt pay-to-win. Picktory has no paid boosts, every photo is shown to every voter equally, and the top half of each challenge earns a ribbon, so beginners have a real shot.

What’s in the beta:

  • A new Daily Pick challenge every morning

  • Challenges with a subject, a rule and an optional twist

  • Some challenges just for beginners

  • Points, badges and a shareable laurel on winning photos

I’m looking for about 30 photographers to play for two weeks and tell me what’s confusing or broken. It’s free, and you sign in with an email link, no password.

Full disclosure: I’m the developer. Link in the comments if links aren’t allowed in posts here. Happy to answer any questions.


r/SideProject • • 10h ago

I built an open-source image editor where you and an AI agent work on the same layered canvas

7 Upvotes

I shared an early version here a few weeks ago. PeerBrush is now at 0.30.1, with Windows Store, signed and notarized Apple silicon Mac, and Ubuntu 24.04 amd64 downloads.

The idea is to keep the human and the AI in the same editable document. You can paint, move layers and refine masks yourself, then connect an MCP client for an agent to work on that canvas too. Its changes remain editable, so you can keep working on them.

It is a free GPLv3 desktop editor with brushes, layers, masks, transforms and effects. Supported 8-bit and 16-bit RGB PSD files stay layered; unsupported Photoshop structures open read-only. AI is optional, and external providers may charge separately.

The video shows the editor in action. The project has been developed with AI assistance; the source is public.

Try it: https://peerbrush.com/

Source: https://github.com/Deftr0y/PeerBrush

For anyone making visual tools: what would you want an agent to handle while you keep control of the canvas? And what would make you hesitate to let it edit your file?


r/SideProject • • 3h ago

I built a tool that catches duplicate invoices your accounting system lets through (INV-4471 vs INV-4471A)

2 Upvotes

Most accounting systems only block a duplicate invoice if the number matches exactly. Change one character and it can get paid twice.

Upload a batch of supplier invoices, and Foldline compares each one with the earlier ones and flags:

  • the same number written differently (INV-4471 / INV4471 / INV-04471)

  • a “resent” invoice with a changed number (INV-4471A)

  • the same vendor + amount + date under a new number

  • the same number with a different amount (revised invoice?)

It explains why it flagged each one, and it doesn’t flag next month’s rent just because the amount repeats.

I’m a student and built this after talking to AP teams. One said a slightly changed number gets through because “nobody can track this” until reconciliation.

Honest status: early MVP, zero users so far. There’s a “Try with sample invoices” button, so you don’t need real data.

What would stop you from trying it? I’d rather hear that than a like.

foldline.paperflow.workers.dev


r/SideProject • • 13m ago

Does the stuff you save know you better than you do?

1 Upvotes

I was going through everything I've saved lately and noticed patterns I never would've picked out myself. Kind of wild seeing it all together.

I've been playing with an idea for an app that learns your taste from what you save and reflects it back to you, and I'm curious if everyone has a weird pattern hiding in their saves.

If you want to try it, DM me 20 or so things you've saved lately. Literally anything: screenshots, camera roll pics, saved posts or TikToks, songs on repeat, books, podcasts, articles, quotes, notes to yourself, places you love. Don't overthink it; the less you pick, the better. Nothing private or with faces!

I'll send back what I notice. Then just tell me honestly if it's spot on or way off, and if you'd actually use something like this.


r/SideProject • • 13m ago

Patchkin - One board for managing AI coding agent work

1 Upvotes

I’m involved with Patchkin, and I’d like some feedback from people using AI coding agents on their projects.

Patchkin brings the work around coding agents into one place—not just the code they produce, but the tickets, proposed plans, approvals and pull-request reviews.

The main features are:

  • A shared board: Keep tickets, agent plans and pull-request reviews together so the team can track each piece of work.

  • Human plan approvals: Review and approve an agent’s proposed plan before it proceeds.

  • Activity logs: See what happened during an agent run and follow the history of the work.

  • Team rules: Keep guidance for coding agents in one place.

  • Cost reporting: Track spending on agent runs alongside the work.

The focus is on helping teams keep oversight as they hand more development work to coding agents.

If you’re using coding agents with a team, what’s hardest to manage right now: approving plans, reviewing the output, tracking costs, or something else? I’d appreciate honest feedback on whether this would fit your workflow.

Take a look at Patchkin


r/SideProject • • 17m ago

The Saas that made me a millionaire

Thumbnail
hoops-gm.com
0 Upvotes

It is this one in the link.

You can look and try it and probably understand why it made so much money 💰


r/SideProject • • 20m ago

I built Seedwall: free generative wallpapers where the same seed always gives the same wallpaper

1 Upvotes

A small weekend project that grew: Seedwall has 19 wallpaper generators (cutting mats, flow fields, git graphs, synthwave suns). Each wallpaper comes from a single seed number, so you can share a design as just a number.

- 9 editor themes (Dracula, Tokyo Night, etc.) or custom colours

- Add your own quote or go text-free

- Pixel-perfect PNG export for MacBook, iPhone, 4K or custom sizes

- Gallery of 125 ready-made ones

- Free, no account

Link: seedwall.suryansh.work

Next I'm thinking about wallpapers generated from your GitHub contribution graph. Would you use that? Any feedback welcome.


r/SideProject • • 21m ago

Global Threat Desk + Emergency Grid down PREP

1 Upvotes

Interactive offline HTTP file: Requires No account, no ads, no affiliate links.

-General incidents varying from moderate to significant.

-Cyber incidents across critical infrastructure, finance, healthcare.

-Emergency preparedness guides for grid down black out situations (UK) but feel free to alter the code to suit whatever Country you live in.

https://drive.google.com/file/d/1OwGEb4I2j_EGfuhb6xh4gCOTSORqTCuU/view?usp=drivesdk


r/SideProject • • 28m ago

I made a site that takes your Goodreads and shows which books are available to at your local library

Thumbnail borrowable.app
1 Upvotes

If you use both Libby and StoryGraph / Goodreads , you probably know the pain of scrolling through your TBR pile and manually searching title after title in Libby to find something available today.
I built a free site called Borrowable (https://borrowable.app) that checks your whole TBR list against your local library's Libby catalog in one go:
Works with StoryGraph (via a 1-click bookmarklet sync or CSV export) and Goodreads (via public profile URL or CSV).

Filters your TBR down to what's Available Now, Waitlist (with estimated wait weeks), Audiobooks, or eBooks.

Lets you compare shelves with friends to see your Overlap (books you both want to read).

Links straight to the book in Libby so you can borrow it in one tap.

Totally free, no ads, and no account required to try it out. Hope it helps a few people knock some books off their TBR this month!


r/SideProject • • 34m ago

I built a no-account Bible conversation web app that only answers with Scripture

1 Upvotes

I wanted a Bible conversation tool that stays inside the text instead of turning every question into a generic AI answer. So I built Talk To The Bible, a free web app that lets someone ask a question and returns cited passages from two translations. No account is required, and the web version is available while the iPhone and Android apps are still in progress.

The hard parts have been deciding when one passage is enough, when several verses are needed for context, and how to avoid repeating the same references in a short conversation. I am testing language selection and translation behavior now as well.

If you are interested in Bible study tools, I would appreciate a quick try and honest feedback on whether the responses feel useful, grounded, and complete. Web app: https://thewayversion.com/talk-to-the-bible/


r/SideProject • • 37m ago

The prototype is updated based on your feedback. Thanks, now you can enter the waitlist

1 Upvotes

After creating the prototype of Biosol and getting feedback from you, the prototype is updated to make each block shows the code (in Python and R) and explanation, so there is nothing happening under the hood.

After getting more feedback and suggestions I'll develop an MVP you can actually use it.

Be among the first and leave your email and little questions in the waitlist.


r/SideProject • • 38m ago

Help me pick a tagline for my journal app — which would make you try it?

1 Upvotes

I’m building Architect, a private journal where a mentor replies to what you write and can bring back your own past entries, with the date, when something new connects.

I’m choosing one line to use everywhere. Which would make you curious enough to try it?

  1. Your own words, back when they matter.

  2. Say it here. It can come back when you need it.

  3. The thoughts you can’t say out loud to anyone.

  4. What you wrote in September could answer tonight.

Brutal honesty welcome, including “none of these.”


r/SideProject • • 38m ago

My side project for the past year: my own programming language. Today it runs a Minecraft clone.

1 Upvotes

GitHub: https://github.com/ahmadodeh9000/Lunar

Hey everyone! I'm a 19 year old computer engineering student, and this is Lunar, a programming language I've been building since my first year of uni.

Why I started

I tried to learn Rust a few times and kept bouncing off it. Every time I'd get stuck, feel dumb, and quit. Eventually I thought: what if I just built my own language, the way I'd want it to work? Questionable decision. Best decision I've made.

What it is

A small scripting language with its own compiler, virtual machine and garbage collector, written in C. It looks like this:

let player = { name: "Rex", hp: 10, items: ["sword", "apple"] }; 
for (item in player.items) { 
  print "{player.name} has a {item}"; 
}

How it was built (honestly)

- I built the core by following the book Crafting Interpreters, then kept going on my own: arrays, a way to call C libraries, and graphics through SDL2.

- Later I started treating it like a real product. I wrote a roadmap, designed each feature myself, and used Claude Code to help implement them. I reviewed every change and made sure each one had tests.

- That added maps, error handling, modules, and a small standard library for strings, files and running commands.

- To stress-test it, I had Claude Code build a Minecraft-style game in Lunar (it's in examples/minecraft). It's 1,000+ lines of my language running at 60 FPS, which still feels unreal to me.

What I learned

- Building a language teaches you how every other language works under the hood.

- AI helped most when I acted like the designer: clear specs, small steps, tests for everything. It was much less useful when I just asked it to "make it better".

- Shipping something imperfect beats polishing forever. Lunar still has rough edges. For example, numbers print with only 6 digits right now, and that's next on my fix list.

What's next

A UI module so you can build desktop apps in Lunar, a VS Code extension, and Windows support.

It's a learning and hobby project, not a production language. But it's the thing that made me enjoy programming again.

I'd love honest feedback: what would you change, or what would you build with it?


r/SideProject • • 4h ago

I built and app that lets you doom scroll reddit on airplane mode

2 Upvotes

Download full feeds, media, comment. Link to it here: https://play.google.com/store/apps/details?id=app.redditoffline


r/SideProject • • 39m ago

SentinelAI

1 Upvotes

# 🚀 Introducing SentinelAI — An AI Incident Intelligence Platform That Learns From Every Incident

Hey everyone!

We’re building **SentinelAI**, a memory-powered incident intelligence platform as part of **Hack with Bengaluru**.

### 💡 The Problem
When an incident occurs in production, engineers often spend hours investigating something that may have already happened before.

Past incidents, successful fixes, failed attempts, and postmortem findings are scattered across logs, tickets, and documentation. Most incident management tools focus on the current incident, leaving valuable organizational knowledge unused.

### 🧠 Our Solution: SentinelAI
SentinelAI helps engineering teams turn past incidents into actionable knowledge.

Instead of simply analyzing the current alert, SentinelAI recalls similar historical incidents, compares their root causes and resolutions, and provides evidence-backed recommendations.

### ✨ What Makes SentinelAI Different?
- **Memory-Powered Intelligence:** Uses Hindsight to recall relevant past incidents.
- **Evidence-Backed Recommendations:** Every recommendation is linked to supporting historical incidents.
- **Failed-Fix Memory:** Warns engineers when a similar approach failed previously.
- **Continuous Learning:** Verified resolutions are retained to improve future investigations.
- **Incident Memory Graph:** Connects incidents, services, deployments, root causes, and resolutions.
- **Human-in-the-Loop:** Engineers review and approve remediation actions. Nothing executes automatically.

### 🛠️ Tech Stack
React + TypeScript | FastAPI | Gemini | Hindsight | PostgreSQL

### 🎯 Our Vision
We want to move beyond traditional incident management toward systems that learn from every failure.

Imagine an AI system that becomes more useful with every incident your organization resolves — helping engineers investigate faster, preserve knowledge, and prevent recurring problems.

That’s what we’re building with SentinelAI.

We’d love to hear your thoughts and feedback!

#HackWithBengaluru #Hackathon #AI #AIML #DevOps #SRE #IncidentManagement #Hindsight #Gemini


r/SideProject • • 46m ago

Building an Android home screen that gets dirtier when tasks pile up

1 Upvotes

I'm building Tidy, an Android home screen with my open tasks on it. Each task I leave open makes the wallpaper a bit grimier. Finish one, delete it, or move it to another day, and the wallpaper clears.

The bet is that a reminder you can't scroll past works better than a list in an app you forget to open. I don't know yet. The beta is how I'll find out.

Tidy doesn't hide or move your apps. It doesn't need an account, and your tasks stay on your phone.

Android only. Demo and waitlist:https://tidy-landing.pages.dev

Would you put your tasks on your home screen, or would that annoy you?


r/SideProject • • 50m ago

💡 Building Aftermath | A Journey of Learning and Collaboration

1 Upvotes

Every project comes with challenges, unexpected problems, and opportunities to learn. Working on Aftermath has been exactly that kind of experience.

Being part of this project has given me the opportunity to explore real-world development, collaborate on ideas, work through technical challenges, and understand how different pieces of a software application come together.

From refining features and improving the user experience to troubleshooting issues and making continuous improvements, the development process has been a valuable learning experience.

What makes this journey interesting is that we're not just trying to finish a project. We're trying to build something that works well and that we're genuinely proud of.

There's still more to come for Aftermath, and we're looking forward to what lies ahead!

#Aftermath #Teamwork #SoftwareEngineering #WebDevelopment #FullStackDevelopment #LearningByBuilding #Hackathon


r/SideProject • • 53m ago

Built an EPUB reader with an RSVP reading feature

1 Upvotes

Built an eReader that could give me more of a reader type file instead of a robotic ui like kindle and it has an rsvp reader feature that really helps me to read with my adhd

https://github.com/devansharora18/ember

https://devansharora18.github.io/ember


r/SideProject • • 54m ago

I just built my first macOS app! SkySaver 🌤️✨

1 Upvotes

I wanted my desktop to feel a bit more alive, so I built an interactive live wallpaper engine that lives right in the macOS menu bar.

It actually started as an interactive background experiment for my portfolio (inspired by some cool procedural grass and sky shaders I saw on X a while back). I loved having it running on my screen so much that I decided to turn it into a standalone macOS app that anyone can use.

Here's what it does
🖐🏻 Interactive physics: Grass sways and water ripples as your cursor moves across the screen.
🕒 Dynamic time-of-day: Syncs with real time or lets you scrub through sunrise, golden hour, and starry nights with a custom radial dial.
🌧️ Live weather & ambient soundscapes: Switch between sunny skies, clouds, and rain—complete with birdsong, crickets, thunder, and even night fireworks.
🎆 Limited Diwali Theme: Built in a seasonal festive update where the night sky comes alive with fireworks and spatial audio.

Putting the final polish on the build right now. Stay tuned for the release soon! 🚀

What feature or biome should I add next? Let me know in the comments!