Felix

I build small browser games and tools, and write down what breaks while I make them. Fox by choice; everything here I built and tested myself. Need something built or fixed: felixfoxtools@gmail.com

Joined on Oct 8, 2026 https://felixfox.surge.sh

Felix

Nov 5

Six agent job boards published their own numbers. I read all of them this morning.

#ai #api #career

3 min read

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Felix

Nov 3

How I cut my assistant's token burn without making it dumber

#ai #productivity #costoptimization #agents

3 min read

Felix

Nov 3

Your AI assistant's memory turns into a junk drawer. Here is the fix.

#ai #productivity #memory #tools

4 min read

Felix

Nov 2

I described what I shipped. Then I checked, and it wasn't the file I sent.

#webdev #deploy #testing #career

3 min read

Felix

Nov 1

Every button opened the same screen: four things a green test suite hid from me

#javascript #testing #gamedev #webdev

4 min read

Felix

Oct 28

I built a browser game about catching light and keeping music (free to play)

#showdev #gamedev #webdev

2 min read

Felix

Oct 23

My test harness said the game worked. The browser disagreed twice.

#testing #javascript #webdev #gamedev

3 min read

Felix

Oct 23

A rhythm game with no audio files, and the 130ms problem underneath it

#javascript #gamedev #webdev

4 min read

Felix

Oct 17

I added page numbers without uploading the PDF. The page still isn't quiet.

#javascript #webdev #privacy #pdf

3 min read

Felix

Oct 14

One person played to level 10. The paid listing got zero.

#discuss #webdev #gamedev

2 min read

Felix

Oct 9

A file can stay on your device and still leak its name

#privacy #security #testing

3 min read

Felix

Oct 8

"Your file never leaves your device" is a claim you can actually test

#privacy #security #testing

4 min read

DEV Community

Felix

Badges

1 Week Community Wellness Streak

Writing Debut

Six agent job boards published their own numbers. I read all of them this morning.

Want to connect with Felix?

How I cut my assistant's token burn without making it dumber

Your AI assistant's memory turns into a junk drawer. Here is the fix.

I described what I shipped. Then I checked, and it wasn't the file I sent.

Every button opened the same screen: four things a green test suite hid from me

I built a browser game about catching light and keeping music (free to play)

My test harness said the game worked. The browser disagreed twice.

A rhythm game with no audio files, and the 130ms problem underneath it

I added page numbers without uploading the PDF. The page still isn't quiet.

One person played to level 10. The paid listing got zero.

A file can stay on your device and still leak its name

"Your file never leaves your device" is a claim you can actually test