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DEV Challenges

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

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I Ran Every Gemma 4 Model on My Home Lab. E4B Crushes E2B. Here's the Data.

Gemma 4 Challenge: Write about Gemma 4 Submission

I Ran Every Gemma 4 Model on My Home Lab. E4B Crushes E2B. Here's the Data.

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Comments 1
3 min read
wfguard: a GitHub Actions supply-chain auditor

Gemma 4 Challenge: Build With Gemma 4 Submission

wfguard: a GitHub Actions supply-chain auditor

4
Comments
4 min read
Your Hermes agent's prompt cache is 30% hit because of one timestamp. Here's how to find it.

Hermes Agent Challenge Submission: Write About Hermes Agent

Your Hermes agent's prompt cache is 30% hit because of one timestamp. Here's how to find it.

4
Comments
4 min read
I had 3,000 agent trace events in JSONL. My manager wanted them in Excel. One line.

Hermes Agent Challenge Submission: Build With Hermes Agent

I had 3,000 agent trace events in JSONL. My manager wanted them in Excel. One line.

2
Comments
2 min read
Google Just Rebuilt the Search Box (Again) — But This Time It's Different

Google I/O Writing Challenge Submission

Google Just Rebuilt the Search Box (Again) — But This Time It's Different

2
Comments
6 min read
Building FarmWise: An AI Field Advisor for Subsistence Farmers Using Gemma 4

Gemma 4 Challenge: Write about Gemma 4 Submission

Building FarmWise: An AI Field Advisor for Subsistence Farmers Using Gemma 4

4
Comments
7 min read
Context window exceeded at turn 23. Here's how I track token usage without a tokenizer.

Hermes Agent Challenge Submission: Write About Hermes Agent

Context window exceeded at turn 23. Here's how I track token usage without a tokenizer.

2
Comments
1 min read
Multimodal Gemma 4 Visual Regression & Patch Agent

Gemma 4 Challenge: Build With Gemma 4 Submission

Multimodal Gemma 4 Visual Regression & Patch Agent

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Comments 5
6 min read
Gemma 4 on Android: Tricks for Faster On-Device Inference

Gemma 4 Challenge: Write about Gemma 4 Submission

Gemma 4 on Android: Tricks for Faster On-Device Inference

21
Comments 3
8 min read
How Building `shuka` Helped Me Stay Consistent

GitHub “Finish-Up-A-Thon” Challenge Submission

How Building `shuka` Helped Me Stay Consistent

3
Comments
3 min read
Your Local AI Software Engineer

Gemma 4 Challenge: Build With Gemma 4 Submission

Your Local AI Software Engineer

5
Comments
5 min read
Health Connect + Gemma = HealthOps

Gemma 4 Challenge: Build With Gemma 4 Submission

Health Connect + Gemma = HealthOps

5
Comments
3 min read
How I Built a Local, Multimodal Gemma 4 Visual Regression & Patch Agent: Closed-Loop Validation, Canvas Pixel Diffing, and Reproducible Benchmarks

Gemma 4 Challenge: Write about Gemma 4 Submission

How I Built a Local, Multimodal Gemma 4 Visual Regression & Patch Agent: Closed-Loop Validation, Canvas Pixel Diffing, and Reproducible Benchmarks

9
Comments 8
7 min read
5 things `flutter_gemma` doesn't tell you about shipping Gemma 4 on Android

Gemma 4 Challenge: Write about Gemma 4 Submission

5 things `flutter_gemma` doesn't tell you about shipping Gemma 4 on Android

4
Comments
9 min read
What Is WebMCP? The Google I/O 2026 Web Standard That Changes AI Agent Tool Use

Google I/O Writing Challenge Submission

What Is WebMCP? The Google I/O 2026 Web Standard That Changes AI Agent Tool Use

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Comments 2
6 min read
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