Five tools in use today
Each one was built because we needed it, and each one is in use.
Work screens are partly blurred so no customer data is shown.
In use at Nusoolab
Hyeonjangrok
Job records, estimates and reports in one place
A work app used by Nusoolab,
a leak-repair company in Busan.
Log each job with photos and notes,
and the record becomes an estimate and a report.
- 543
- commits
- 923
- estimate cases
- v3
- version
- Work, paperwork and payment, tracked apartEach stage moves from check to in progress to done
- Search past estimatesFind similar jobs by type of work and location
- From job record to estimateLink a record and issue the estimate from it
Testing · regular use from November
Yeokkeum
From job-site photos to blog posts
Plenty of job photos, never time to write.
This Windows app does that part for you.
- v4.16
- version
- 7,900
- tokens per post
- Sep
- first draft
- Picks the right photosAI chooses which job photos to use in the post
- From title to tagsDrafts the title, body and tags from real job notes
- Through to schedulingSchedules the checked post on Naver Blog
Open to everyone
After Reading
Keep what stays with you after a book
The first app we built.
Track reading time and thoughts,
and pick up on your phone or computer.
- 74
- commits
- 10
- reading categories
- Reading timerShows your reading time for today and this month
- Favorites and book clubsSave books to reread and notes from meetings
Open to everyone
Chaekrok
A reading journal for thoughts, not just titles
Book list, calendar, ratings, favorite quotes
and reviews, all in one journal.
- 113
- commits
- 11
- books logged
- Add a book by searchTitle, author and cover fill in automatically
- A calendar of coversSee a month of reading at a glance
Personal · app is locked
Salpim
A health log for watching change over time
Log weight, body composition, workouts and pain,
and see the trend as a chart.
- 101
- commits
- 4
- Notion databases
- 7-day averageFollow the trend, not the daily ups and downs
- Body composition comparedBody fat, muscle mass and waist, month by month
How we work with Claude
People decide,
Claude helps build
The founder decides what is needed
and how it should work.
The code is written and fixed with Claude,
and now Claude works inside the products too.
- Building
A non-developer founder builds with AI,
and Claude Code is the tool used most.- Web apps (Vercel)
- Website (Cloudflare)
- Installable Windows app
- Notion and phone data sync
- In the product
Yeokkeum uses the Claude API to turn
job photos and notes into readable posts.- Claude Sonnet 5.5
- Automatic image resizing
- Usage logged for every post
- Next
Field businesses spend hours on paperwork.
We want Claude to take that work on.- Estimate suggestions from 900+ past jobs
- Automatic photo captions
- Report drafts for insurance claims
How we make things
Build small, use it, fix it
Write down the friction
Note what keeps
getting in the way.Build right away
Get to something usable,
together with AI.Use it ourselves
Use it on real jobs and in daily life
to find where it breaks.Fix and ship again
Fix, redeploy, and repeat.
Only what is needed
Build the features people use
and remove the ones they do not.
Hide data first
Customer addresses, prices and health data
are hidden before anything is shown.
Write it as it is
Only numbers we have checked
go on this page.
Timeline
From a failed try to a studio
- The first try failed
Six hours trying to build an app with AI ended with the usage limit and nothing working.
- Starting again from one small need
Built After Reading to keep notes on books, then Chaekrok and Salpim.
- The first tool for real work
Built the job-record app for Nusoolab and grew it into estimates and reports.
- Claude API inside the product
Yeokkeum wrote its first blog draft with Claude.
- nusoolab.com launched
A website and company email for the leak-repair business the tools serve.
- Dambit begins
dambit.dev opened to bring the tools together.
The maker
Yunseul
I did not study development.
In February 2025 I gave up after six hours of trying to build an app with AI.
The reason to start again was simple.
I wanted to keep notes on the books I read,
and hoped what I made could help the people around me.
That small start now runs the job records,
estimates and reports of a leak-repair company.
Hold what you need,
and let it shine.Dambit (담빛) means "holding light."
FAQ
Questions
How do you build without developers?
Design, coding, bug fixes and deployment all happen in conversation with AI, mostly Claude Code.
The founder decides what is needed and finds what to fix by using the tools.
Can other companies use the work tools?
For now they are used only at Nusoolab. If they become ready for others, we will say so here.
Is customer data safe?
Work apps require sign-in, and the screens on this site are blurred captures.
Where do you use Claude?
Claude Code is our main tool for building apps, and Yeokkeum uses the Claude API to write blog drafts.