Den

Building Boolflow (browser-based digital logic simulator, boolflow.site) and RealFeedApp (AI news digest, realfeedapp.com). I write about what breaks along the way.

Joined on Apr 1, 2026 https://www.boolflow.site

Den

Aug 31

ValidationError Is Not a Policy

#python #json #validation #architecture

6 min read

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Den

Aug 31

JSON and Data Validation in Python: From File Reading to Strict Contracts

#python #json #beginners

6 min read

Den

Aug 31

The Schema Was Valid. The Translation Was in Chinese

#ai #llm #python #programming

5 min read

Den

Aug 31

Everything worked when I looked at it. That was the bug.

#seo #webdev #javascript #debugging

8 min read

Den

Aug 26

I know what to build next. My own architecture disagrees about the order

#webdev #javascript #programming #architecture

11 min read

Den

Aug 26

I compared my logic simulator to 9 others. Here is where mine loses

#webdev #education #computerscience #productivity

9 min read

Den

Aug 25

I Rewrote the Same Prompt Three Times, Tuning Against Noise

#ai #python #testing #llm

5 min read

Den

Aug 24

Your AI Cover Art Looks Great — Until It's a Thumbnail

#showdev #ai #webdev #programming

4 min read

Den

Aug 18

I Built a Free AI Digest for Science and Tech News

#showdev #ai #webdev #productivity

3 min read

Den

Aug 18

Boolflow v4: I added a 17-article learning section to my browser-based logic simulator

#webdev #engineering #computerscience #education

5 min read

Den

Apr 15

Boolflow v3: Improving the First-Time Experience of My Browser-Based Digital Logic Simulator

#webdev #education #engineering #computerscience

4 min read

Den

Apr 7

Boolflow v2: A Major Update to My Free Browser-Based Digital Logic Simulator

#webdev #engineering #education #computerscience

4 min read

Den

Apr 1

I Built a Free Browser-Based Digital Logic Simulator for Learning Boolean Algebra

#webdev #education #engineering #computerscience

2 min read

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ValidationError Is Not a Policy

Want to connect with Den?

JSON and Data Validation in Python: From File Reading to Strict Contracts

The Schema Was Valid. The Translation Was in Chinese

Everything worked when I looked at it. That was the bug.

I know what to build next. My own architecture disagrees about the order

I compared my logic simulator to 9 others. Here is where mine loses

I Rewrote the Same Prompt Three Times, Tuning Against Noise

Your AI Cover Art Looks Great — Until It's a Thumbnail

I Built a Free AI Digest for Science and Tech News

Boolflow v4: I added a 17-article learning section to my browser-based logic simulator

Boolflow v3: Improving the First-Time Experience of My Browser-Based Digital Logic Simulator

Boolflow v2: A Major Update to My Free Browser-Based Digital Logic Simulator

I Built a Free Browser-Based Digital Logic Simulator for Learning Boolean Algebra