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DEV Challenges

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

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Building an Autonomous MCP Lead Generation System with Hermes Agent

Hermes Agent Challenge Submission: Build With Hermes Agent

Building an Autonomous MCP Lead Generation System with Hermes Agent

3
Comments 2
5 min read
Validating Gemma 4 for Industrial IoT: A Governance Pattern

Gemma 4 Challenge: Build With Gemma 4 Submission

Validating Gemma 4 for Industrial IoT: A Governance Pattern

4
Comments
3 min read
My Hermes agent's stop condition was a 40-line if/elif chain. I replaced it with 3 lines.

Hermes Agent Challenge Submission: Write About Hermes Agent

My Hermes agent's stop condition was a 40-line if/elif chain. I replaced it with 3 lines.

4
Comments
2 min read
Fast-Track CBT: A Clean, Zero-Stress Online Testing Platform

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

Fast-Track CBT: A Clean, Zero-Stress Online Testing Platform

4
Comments
4 min read
The Sleeper Announcement from Google I/O 2026 That Will Change How We Think About Apps

Google I/O Writing Challenge Submission

The Sleeper Announcement from Google I/O 2026 That Will Change How We Think About Apps

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Comments 5
7 min read
🎙️Interview Coach AI — Practice Mock Interviews Locally with Gemma 4 + Jan

Gemma 4 Challenge: Build With Gemma 4 Submission

🎙️Interview Coach AI — Practice Mock Interviews Locally with Gemma 4 + Jan

16
Comments
5 min read
I replaced 200 lines of ad-hoc state management in my Hermes agent with one object.

Hermes Agent Challenge Submission: Build With Hermes Agent

I replaced 200 lines of ad-hoc state management in my Hermes agent with one object.

3
Comments
2 min read
What Happens When You Ask an Open-Source Agent to Do Real SRE Work on Windows? A Trajectory Worth Reading

Hermes Agent Challenge Submission: Write About Hermes Agent

What Happens When You Ask an Open-Source Agent to Do Real SRE Work on Windows? A Trajectory Worth Reading

3
Comments 1
6 min read
I changed one line in my Hermes system prompt. prompt-diff showed me exactly what.

Hermes Agent Challenge Submission: Write About Hermes Agent

I changed one line in my Hermes system prompt. prompt-diff showed me exactly what.

2
Comments
3 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

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Comments 4
8 min read
UXRay: I Built an AI That Roasts Your UI Like a Senior Designer Would

Gemma 4 Challenge: Build With Gemma 4 Submission

UXRay: I Built an AI That Roasts Your UI Like a Senior Designer Would

5
Comments 1
4 min read
My Hermes agent ran 500 turns and cost $40 before I noticed. Now it can't.

Hermes Agent Challenge Submission: Build With Hermes Agent

My Hermes agent ran 500 turns and cost $40 before I noticed. Now it can't.

3
Comments
2 min read
From HTTPS to UCP: Shopping Is About to Stop Being Your Problem

Google I/O Writing Challenge Submission

From HTTPS to UCP: Shopping Is About to Stop Being Your Problem

4
Comments
7 min read
Reviving glyph-v8: STRIDE — A Deterministic Field-Aware Integer Analyzer This is a submission for the GitHub Finish-Up-A-Thon Challenge

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

Reviving glyph-v8: STRIDE — A Deterministic Field-Aware Integer Analyzer This is a submission for the GitHub Finish-Up-A-Thon Challenge

2
Comments 1
4 min read
Your Hermes agent's audit log is leaking customer emails. Here's a 100-line lib that fixes that.

Hermes Agent Challenge Submission: Write About Hermes Agent

Your Hermes agent's audit log is leaking customer emails. Here's a 100-line lib that fixes that.

1
Comments 2
4 min read
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