DEV Community: Chestly Ace

Kyuutai: Turning Fandom Into a Living Diary of Gaming, Anime, and Music

Chestly Ace — Mon, 13 Jul 2026 06:34:04 +0000

This is a submission for Weekend Challenge: Passion Edition

What We Built

Kyuutai is a fandom devotion platform for people who want to track, reflect on, and celebrate the things they love most. Instead of treating fandom like a casual list of favorites, it turns it into an interactive experience built around three passions: gaming, anime, and music.

The project is organized around four connected experiences:

Devotion Log — a journal for recording what I watched, played, or listened to, with mood tags, voice dictation, and a timeline view.
Weekly Recap — an AI-generated narrated summary of the last 7 days of fandom activity, with audio playback.
Passion Card — a personalized passion radar that analyzes top games, anime, and artists into an archetype profile, recommendations, and a downloadable visual card.
OST Detective — a soundtrack guessing game built around real game and anime clips, with AI-written questions and narrator reactions.

Team submission:

Dylane(https://dev.to/yveane) — anime
Ace — gaming
Kanjo(https://dev.to/alchemycodes) — music

The goal was to make fandom feel personal, expressive, and a little dramatic — like a living diary for obsession, taste, and identity.

Demo

Live demo: https://kyuutai.vercel.app
Video demo:

Code

GitHub repository:

yvesdylane / kyuutai

Kyuutai is a passion journal with a twist: tell it what game, anime, or song owned your brain today - by voice or text - and it grows into a living timeline of your fandom.

View on GitHub

How I Built It

Kyuutai is built with Next.js 16, React 19, TypeScript, Tailwind CSS 4, PostgreSQL, NextAuth, Google Gemini, and ElevenLabs.

I kept the app organized with a clean App Router structure and a route -> service -> repository pattern so the HTTP layer, business logic, and SQL stay separated.

Google Gemini powers the intelligence layer. It generates weekly recap scripts, analyzes favorite media into a structured passion profile, and writes the short question/reaction text used in OST Detective. Each feature uses a different prompt style: recap narration is warm and dramatic, passion profiles return structured JSON, and OST Detective uses short game-show-style lines.

ElevenLabs handles the voice layer. It turns recap scripts and passion blurbs into audio files saved under public/audio/, which makes the app feel more like a fandom experience than a standard dashboard.

The Devotion Log also uses browser speech recognition for hands-free note-taking, while OST Detective pulls real soundtrack clips from YouTube using yt-dlp and trims them with ffmpeg for short blind-test rounds.

On the database side, the app uses raw SQL with parameterized queries, UUIDs, and a schema designed around journal entries, recap history, passion cards, and game sessions.

Prize Categories

Best Use of Google AI

Google Gemini is the intelligence layer behind multiple parts of Kyuutai, not just a single feature. It writes the weekly recap narration, transforms favorite media into a structured passion profile, and powers the short question and reaction text in OST Detective. I used different prompt styles for each experience: narrative generation for recap audio, strict JSON output for the Passion Card, and concise game-show style writing for the trivia game. That made Google AI central to both the app’s core functionality and its personality.

Best Use of ElevenLabs

ElevenLabs brings Kyuutai’s emotional layer to life through voice. The app converts AI-generated recap scripts and passion blurbs into spoken audio, making the experience feel like a fandom show rather than just a dashboard. In practice, ElevenLabs is used to create weekly recap narration and the Passion Card voice profile, giving users something they can listen to, not just read. The audio output is part of what makes the app feel immersive and polished.

My First Global Hackathon: What I Learned Building Moonsu Link

Chestly Ace — Sat, 04 Jul 2026 02:14:15 +0000

This was my first global hackathon, with 500+ participants from around the world, and although I didn’t win, I’m honestly proud of how much I learned from the experience.

I worked on Moonsu Link, a project I care about deeply. It wasn’t just about building something technical. It was about trying to solve a real problem and pushing an unfinished idea all the way into something more complete, more usable, and more meaningful.

Like many hackathon projects, Moonsu Link came with its own challenges. There were moments of uncertainty, moments where the product needed more structure, and moments where it would have been easy to slow down or stop. But I kept going because I believed the idea was worth finishing.

The Power of Collaboration & Community

What made this experience special was the teamwork. Building with others, sharing ideas, dividing responsibilities, and trying to keep the momentum alive taught me a lot about collaboration. A hackathon is not just about code. It is also about communication, trust, iteration, and resilience.@alchemycodes @yvesdylane

I also learned that progress matters, even when the final result is not a win. Finishing something, improving it, and learning through the process can be just as valuable as a prize.

One of the things I’m happy about is that I received a badge from the DEVPost community. That recognition means a lot to me because it reflects the effort, growth, and persistence behind the project.

Key Takeaways

This hackathon reminded me that:

First attempts are still valuable – Every expert was once a beginner. Starting is half the battle.
Teamwork makes a huge difference – Bouncing ideas off others and distributing tasks accelerates growth.
Challenges are part of the process – Friction and bugs are inevitable; navigating them builds engineering maturity.
Not winning does not mean losing – The knowledge and connections gained are permanent assets.
Learning and finishing count – Shipping a complete product cycle is a victory in itself.

Moving Forward

Moonsu Link may not have taken the top prize, but it gave me something important: experience, confidence, and a stronger mindset for the next challenge.

I’m grateful for the opportunity, grateful for the people I worked with, and grateful that I chose not to give up.

Have you ever participated in a global hackathon? What was your biggest takeaway from your first dev challenge? Let's connect in the comments below!

From Prototype to Production: Finishing Moonsu Link, a Chat-Native Agricultural Marketplace for Cameroon

Chestly Ace — Sun, 07 Jun 2026 23:58:08 +0000

This is a submission for the GitHub Finish-Up-A-Thon Challenge

What We Built

Moonsu Link is a chat-native agricultural marketplace built for farmers and buyers in Cameroon.

In Cameroon, agriculture is central to daily life, but the way products are bought and sold is still fragmented. In many towns, roadside markets and middlemen control access to buyers. In rural areas, farmers often depend on word of mouth, informal contacts, or market days to move their goods.

That creates real friction.

A farmer in Bamenda, Bafoussam, Douala, or Yaoundé may have produce ready, but still struggle to find a buyer quickly, get a fair price, or know where demand is strongest. At the same time, many people already use WhatsApp and Telegram every day, while mobile data costs, app installs, and complicated onboarding can get in the way. Language matters too. Cameroon is bilingual, and any useful product has to feel natural in both English and French while staying simple enough for users with different levels of digital comfort.

Moonsu Link was built to close that gap by bringing the marketplace into the chat apps people already use. The goal is to reduce friction and make trade feel more direct, local, and trustworthy.

The idea is simple:
help farmers list produce easily, help buyers search in plain language, and let both sides trade without needing a separate app.

Instead of pushing users into a dashboard-first experience, Moonsu Link works through WhatsApp and Telegram, the platforms people already know.

With Moonsu Link, a farmer can list produce with location, price, quantity, and optional photos. Buyers can search naturally, compare listings, check market prices, and express interest. The platform also supports farmer verification, community reports, farming advice, voice messages, and cross-platform use across WhatsApp and Telegram.

What began as an unfinished idea is now a real product with a clear user flow, a polished web presence, and a backend that connects messaging, AI, search, verification, and notifications into one system.

Demo

Live app: https://moonsulink.vercel.app
GitHub repository:https://github.com/yvesdylane/Moonsun-Link-api , https://github.com/yvesdylane/MoonsuLinkFrontend
Video walkthrough: https://youtu.be/6skq9w_mw-s?si=c5YCVunZ3RC5Qfqs
Screenshots:!Moonsu Telegram Bot(https://dev-to-uploads.s3.amazonaws.com/uploads/articles/b1ewivz77iwyli4gh01a.jpeg) , !Moonsu Whatsapp (https://dev-to-uploads.s3.amazonaws.com/uploads/articles/op3lmh99vio6zbxu4bcl.jpg) , !Moonsu Admin Dahboard(https://dev-to-uploads.s3.amazonaws.com/uploads/articles/cit70l8bc84pijmworrj.jpg)

The Comeback Story

!Moonsu website before finishathon(https://dev-to-uploads.s3.amazonaws.com/uploads/articles/2nlqiwperncglto84re2.png)
Moonsu Link did not start as a finished product. It began as a prototype built around a real problem, but like many hackathon projects, it never fully crossed the finish line.

The idea was strong, but the product needed more structure, cleaner UX, better flow, and real end-to-end functionality before it could genuinely help users.

For this challenge, We came back to it with a different mindset. We treated it like a real product, not just a demo.

That meant focusing on the things that matter most:

making the experience feel unified across WhatsApp, Telegram, and the web
refining the landing page so the product story is clear immediately
building a visual identity that reflects a Cameroon-first agricultural context
improving backend flows for messaging, listings, verification, search, and notifications
making the product feel trustworthy, usable, and ready to present to real users

The biggest difference is that the project is no longer just an idea. It now has a clear user journey, a stronger brand, and real functionality that shows what the product is supposed to do.

Our Experience with GitHub Copilot

GitHub Copilot helped me move faster and finish with more confidence.

It was especially useful for:

building repetitive frontend sections faster
cleaning up component structure
speeding up backend boilerplate and integrations
iterating on UI copy and layout
reducing friction while refactoring and finishing incomplete parts of the project

What mattered most was not just speed, but momentum.

Copilot helped us keep the project moving when we needed to turn unfinished ideas into working features and a coherent product experience.

Why This Project Matters
Agriculture is one of the most important parts of everyday life in Cameroon, but many farmers still struggle with discovery, pricing, trust, and access to buyers.

Moonsu Link tries to solve that with one simple idea:

Meet users where they already are.

No app install
No complicated onboarding
No unfamiliar workflow
Just a practical marketplace inside the chat platforms people already use

That is why this project felt worth finishing. It is not just a technical build. It is a tool that could genuinely reduce friction for farmers and buyers.

The Stack

Frontend:
Next.js 16, React 19, TypeScript, Tailwind CSS v4, Framer Motion

Backend:
FastAPI, PostgreSQL, Telegram Bot API, WhatsApp integration, AI-powered message handling, translation, voice transcription, image upload, and admin APIs

What Changed During the Comeback

The project went from unfinished to presentable by focusing on:

a clearer product story
a stronger landing page
better visual consistency
real cross-platform marketplace flows
verification and trust features
AI-assisted handling of user messages
more polished communication for farmers and buyers

Authors
Main Author: Yves Dylane @yveane _
Co-Author: _Chestly Amahndong @chestly_ace
Co-Author: _Kanjo Elkamira @alchemycodes
_