DEV Community: ROHINI RAY

MarketMate: Gemma 4 Turns Rough Product Notes Into Ready-to-Edit Listings

ROHINI RAY — Tue, 13 Oct 2026 06:27:14 +0000

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle

What I Built

MarketMate turns rough product notes into a marketplace-ready title, description, search tags, opening line, and positioning suggestion. It’s for independent Etsy, Shopify, eBay, and Instagram Shop sellers who want to spend less time writing listings. I haven’t tested willingness to pay yet.

Demo

https://market-mate-gamma.vercel.app/

Code

https://github.com/rohini-ray/MarketMate.git

How I Built It

MarketMate uses Flask with an HTML, CSS, and JavaScript interface. The backend sends product notes to Gemma 4 through OpenRouter. It defaults to google/gemma-4-26b-a4b-it; the model can be switched using OPENROUTER_MODEL. The OpenRouter key is stored in Vercel’s environment variables, not in browser code. MarketMate doesn’t save drafts. Notes are sent to OpenRouter for generation, so users shouldn’t include private customer information.

Why Does Open Innovation Matter?

Gemma 4’s open weights give me the flexibility to change models and a possible path to self-hosting or fine-tuning later. This version uses hosted inference through OpenRouter; it doesn’t run offline, and product notes leave the app to generate copy.

My Agent Session

Building MarketMate with Gemma 4, OpenRouter, and Vercel Gemma 4 via OpenRouter

You

Build a useful side-hustle project around open-source AI, Gemma 4 through OpenRouter, Render, and GitHub Copilot.

Agent

Built MarketMate, a listing-copy assistant for independent marketplace sellers. It uses a Flask backend and a browser UI to turn seller notes into a title, description, search tags, opening hook, and positioning suggestion. Gemma 4 is called through OpenRouter; the model can be changed through OPENROUTER_MODEL. The app does not save drafts, and its UI explains that notes are sent to OpenRouter for generation.

▸ workspace_edit Created the Flask app, responsive UI, Render Blueprint, Vercel-compatible Fla...

Input

Created the Flask app, responsive UI, Render Blueprint, Vercel-compatible Flask entry point, README, MIT license, and Copilot project instructions. No API keys included.

Output

MarketMate project files created and configured.

You

I deployed using Vercel. Where do I add the OpenRouter API key?

Agent

Add OPENROUTER_API_KEY under Vercel Project Settings > Environment Variables, select the environments that need it, save, then redeploy. Store the key in the Value field; do not commit it.

Agent

The GitHub secret scanner found a key in an earlier .env.example commit. The local branch history was replaced with a clean commit that excludes environment files, and .env remains ignored.

Prize Categories

Best Use of Gemma

Solo builder

@rohiniray

PocketPal: A Private Meal Planner Built with Local AI

ROHINI RAY — Sun, 11 Oct 2026 09:23:54 +0000

This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend

What I Built

I built PocketPal, a private meal planner for [friend’s name or relationship], who [describe the real meal-planning problem they face].

PocketPal lets them save ingredients to avoid, browse a small recipe box, and plan meals for the week. Recipes are filtered against their avoid list, and an optional local AI feature can suggest another meal using ingredients they have on hand.

Demo

[Try PocketPal] https://pocketpal-eight.vercel.app/

Code

[View the source on GitHub] https://github.com/rohini-ray/PocketPal.git

How I Built It

PocketPal is a static HTML, CSS, and JavaScript app. It stores the food profile and meal plan in the browser, and its service worker can cache the app shell for offline use.

For optional AI suggestions, PocketPal connects to Ollama running on the user’s own computer. The app can use an open-weight model such as qwen2.5:3b; the model is optional, and the planner and recipe box work without it.

Why Does Open Innovation Matter?

Dietary preferences and pantry details can be personal. PocketPal keeps them in the user’s browser, and local model inference means meal suggestions don’t need to send that information to a hosted AI service.

Using an open-weight model also lets the user choose which model to run. The trade-off is that they need to download the model and have a computer capable of running it. PocketPal’s ingredient checks are only a convenience; they can miss synonyms, hidden ingredients, and cross-contamination, so users still need to verify labels themselves.

My Agent Session

View my DevRelay session

Mosslight: Gemma 4 Turns Garden Plans into a Reason to Go Outside

ROHINI RAY — Sun, 11 Oct 2026 06:39:22 +0000

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 1: Touch Grass

What I Built

Mosslight is a garden helper that turns a few details—your location, sunlight, and what you want to grow—into a short plan for the week. The idea is simple: get one useful suggestion, then close the screen and go outside.

Demo

Try Mosslight: https://mosslight.onrender.com/

Code

The source code is on GitHub: https://github.com/rohini-ray/Mosslight.git

How I Built It

Mosslight is a lightweight HTML, CSS, and JavaScript site hosted on Render. It sends the garden-planning prompt to Gemma 4 through OpenRouter’s chat completions API. Visitors provide their own OpenRouter API key in the page; Mosslight doesn’t save it. If the model request fails, a built-in garden guide can still provide a basic plan.

Why Does Open Innovation Matter?

Mosslight uses Gemma 4, an open-weight model, so the model can be changed or replaced without redesigning the app. Using OpenRouter means visitors don’t have to download hundreds of megabytes of model files or run an inference server themselves.

There’s a tradeoff: Gemma runs through OpenRouter, so the garden details are sent to OpenRouter when a plan is requested. This version needs an internet connection and an API key; it does not run Gemma locally.

Prize Categories

Best Use of Render
Best Use of Gemma
Best Use of GitHub Copilot

Built solo by @rohiniray

Thanks for giving the opportunity to participate!

Working

ROHINI RAY — Sun, 11 Oct 2026 05:00:41 +0000