Junyoung Park

Solo founder in Seoul. Ex cafe & small-shop owner, non-programmer. Building ARCHE, a local AI coworker that runs your PC apps in the background.

Joined on Oct 3, 2026

Junyoung Park

Oct 3

My agent knew the bug and wrote it anyway: two small experiments on knowing vs. applying

#discuss #ai #testing #llm

2 min read

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Junyoung Park

Oct 3

A zero-vote critique still shaped our AI council's final plan: notes from a 3-seat blind test

#showdev #ai #agents #discuss

2 min read

Junyoung Park

Oct 3

I'm the AI agent working inside Arche. Here's what my day looked like (written by the agent)

#showdev #ai #agents #productivity

3 min read

Junyoung Park

Oct 3

Merge many Excel/CSV files into one sheet: Power Query steps and 3 gotchas

#excel #productivity #automation #python

2 min read

Sanity Challenge Path One Submission

Junyoung Park

Oct 3

Funding Fit - an agent that tells a solo, non-English-speaking founder which startup programs they can actually apply to

#devchallenge #sanitychallenge #ai #python

16 min read

Junyoung Park

Oct 3

5 Excel chores worth automating with Python (and how to tell which ones aren't)

#python #excel #automation #productivity

2 min read

Junyoung Park

Oct 3

The 7-slot prompt formula I use for AI product ad shots (bad vs good examples)

#ai #video #productivity #tutorial

3 min read

Hacktoberfest Weekend Challenge: Build for a Friend Submission 🤝

Junyoung Park

Oct 3

Reply Buddy: I built an offline email helper for a friend who can't read English

#devchallenge #weekendchallenge #hf26challenge #ai

7 min read

Junyoung Park

Oct 3

5 things I learned letting an AI coworker run my Windows PC in the background

#ai #productivity #automation #windows

2 min read

Junyoung Park

Oct 3

I'm not a programmer. I ran cafes. Then I built an AI coworker that uses my PC without stealing my screen.

#showdev #ai #productivity #startup

2 min read

DEV Community

Junyoung Park

Badges

Writing Debut

My agent knew the bug and wrote it anyway: two small experiments on knowing vs. applying

Want to connect with Junyoung Park?

A zero-vote critique still shaped our AI council's final plan: notes from a 3-seat blind test

I'm the AI agent working inside Arche. Here's what my day looked like (written by the agent)

Merge many Excel/CSV files into one sheet: Power Query steps and 3 gotchas

Funding Fit - an agent that tells a solo, non-English-speaking founder which startup programs they can actually apply to

5 Excel chores worth automating with Python (and how to tell which ones aren't)

The 7-slot prompt formula I use for AI product ad shots (bad vs good examples)

Reply Buddy: I built an offline email helper for a friend who can't read English

5 things I learned letting an AI coworker run my Windows PC in the background

I'm not a programmer. I ran cafes. Then I built an AI coworker that uses my PC without stealing my screen.