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DEV Challenges

This is the official tag for submissions and announcements related to DEV Challenges.

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Gemma 4 Is the First Open Model I'd Actually Recommend to a Client

Gemma 4 Challenge: Write about Gemma 4 Submission

Gemma 4 Is the First Open Model I'd Actually Recommend to a Client

6
Comments 2
9 min read
Turning Daily Habits into Magic: A Gemini-Powered Eco Dashboard for Kids

DEV Weekend Challenge: Earth Day

Turning Daily Habits into Magic: A Gemini-Powered Eco Dashboard for Kids

1
Comments
2 min read
HERMES AGENT WRITE UP SUMMISSIO

Hermes Agent Challenge Submission

HERMES AGENT WRITE UP SUMMISSIO

3
Comments
4 min read
How to measure prompt cache hit ratio in your Hermes Agent

Hermes Agent Challenge Submission

How to measure prompt cache hit ratio in your Hermes Agent

4
Comments 2
4 min read
Which Gemma 4 Model Should You Actually Use? I Tested All of Them, So You Don't Have To

Gemma 4 Challenge: Write about Gemma 4 Submission

Which Gemma 4 Model Should You Actually Use? I Tested All of Them, So You Don't Have To

4
Comments
6 min read
How Google AI Studio Is Quietly Redefining Developer Workflows

Google I/O Challenge submission

How Google AI Studio Is Quietly Redefining Developer Workflows

4
Comments 1
5 min read
Global Accord: A Climate Negotiation Game for Earth Day

DEV Weekend Challenge: Earth Day

Global Accord: A Climate Negotiation Game for Earth Day

2
Comments
6 min read
Google I/O 2026 - From “Prompting” to “Acting”

Google I/O Challenge submission

Google I/O 2026 - From “Prompting” to “Acting”

9
Comments
4 min read
Two Local-Agent Philosophies: Where Hermes Earns Its Design, and Where the Tradeoffs Invert

Hermes Agent Challenge Submission

Two Local-Agent Philosophies: Where Hermes Earns Its Design, and Where the Tradeoffs Invert

4
Comments
7 min read
Bidet AI — on-device Gemma 4 turns a messy brain-dump into clean writing

Gemma 4 Challenge: Build With Gemma 4 Submission

Bidet AI — on-device Gemma 4 turns a messy brain-dump into clean writing

3
Comments 2
5 min read
LyricLens - AI-powered song lyrics analysis tool

Gemma 4 Challenge: Build With Gemma 4 Submission

LyricLens - AI-powered song lyrics analysis tool

3
Comments
1 min read
I Made Tyre Size Detection App Using Gemma4:e4b

Gemma 4 Challenge: Build With Gemma 4 Submission

I Made Tyre Size Detection App Using Gemma4:e4b

3
Comments 1
2 min read
Repair Before Replace: an AI-powered circularity assistant with persistent repair memory

DEV Weekend Challenge: Earth Day

Repair Before Replace: an AI-powered circularity assistant with persistent repair memory

2
Comments
5 min read
The Developer Playbook is Changing: Thoughts on Google Cloud Next ‘26 and Gemini Enterprise Agents

Google Cloud NEXT '26 Challenge Submission

The Developer Playbook is Changing: Thoughts on Google Cloud Next ‘26 and Gemini Enterprise Agents

5
Comments 1
4 min read
EcoLens 🌍 — Scan Any Object, Discover Its Carbon Impact (Built for Haiti & Resource-Limited Environments)

DEV Weekend Challenge: Earth Day

EcoLens 🌍 — Scan Any Object, Discover Its Carbon Impact (Built for Haiti & Resource-Limited Environments)

2
Comments
3 min read
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