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KunStudio

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How Korean fintech (Toss / KakaoPay / PortOne) actually works under the hood
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How Korean fintech (Toss / KakaoPay / PortOne) actually works under the hood

#korea #fintech #saas #webdev
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5 min read
Two SKUs, One Model: How Prompt Engineering Alone Creates a $19 vs $29 SOP Generator
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Two SKUs, One Model: How Prompt Engineering Alone Creates a $19 vs $29 SOP Generator

#showdev #ai #javascript #buildinpublic
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3 min read
Redesigning a Yard Without Touching the House: Structure-Preserving AI Image Edits With FLUX.2 [pro]
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Redesigning a Yard Without Touching the House: Structure-Preserving AI Image Edits With FLUX.2 [pro]

#showdev #ai #javascript #buildinpublic
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3 min read
Fusing Two Parents Into One Face: Building an Identity-Preserving AI Baby Generator on Cloudflare Functions
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Fusing Two Parents Into One Face: Building an Identity-Preserving AI Baby Generator on Cloudflare Functions

#showdev #ai #javascript #buildinpublic
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3 min read
Why a cancellation-script generator is a lookup table and a template matrix, not an LLM call
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Why a cancellation-script generator is a lookup table and a template matrix, not an LLM call

#showdev #javascript #buildinpublic #webdev
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3 min read
Detecting redundant subscriptions by category instead of matching names (all client-side, localStorage only)
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Detecting redundant subscriptions by category instead of matching names (all client-side, localStorage only)

#showdev #javascript #buildinpublic #webdev
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3 min read
A cancel-by-date calculator that gets clamped month math right (so it doesn't break on Jan 31 + 1 month)
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A cancel-by-date calculator that gets clamped month math right (so it doesn't break on Jan 31 + 1 month)

#showdev #javascript #buildinpublic #webdev
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3 min read
æµ å· å 3 天 2 å¤ â ä å æ å®¢é ¿å æ …æ å ¢å¿…å » 5 ä ªæ ç
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æµ å· å 3 天 2 å¤ â ä å æ å®¢é ¿å æ …æ å ¢å¿…å » 5 ä ªæ ç

#济州岛 #中国游客 #自由行 #韩国旅行
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1 min read
Chaining a segmentation model, a compositing model, and an LLM behind one API call for product photos
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Chaining a segmentation model, a compositing model, and an LLM behind one API call for product photos

#webdev #api #buildinpublic #ai
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3 min read
Making AI dating photos that don't look AI-generated (the negative prompt matters more than the model)
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Making AI dating photos that don't look AI-generated (the negative prompt matters more than the model)

#showdev #ai #buildinpublic #webdev
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3 min read
Turning pet photos into oil portraits without losing the pet's actual face (FLUX.2 [pro] edit, not a LoRA)
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Turning pet photos into oil portraits without losing the pet's actual face (FLUX.2 [pro] edit, not a LoRA)

#showdev #ai #buildinpublic #webdev
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3 min read
How I wired Printify's API to a PayPal-only checkout for a print-on-demand shop (no Shopify, no Stripe)
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How I wired Printify's API to a PayPal-only checkout for a print-on-demand shop (no Shopify, no Stripe)

#webdev #api #buildinpublic #ecommerce
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2 min read
I built an old-photo restoration tool on fal's photo-restoration model — here's the actual pipeline
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I built an old-photo restoration tool on fal's photo-restoration model — here's the actual pipeline

#showdev #ai #buildinpublic #computervision
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2 min read
I built an AI headshot tool that keeps the actual face (flux-pulid instead of pure diffusion)
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I built an AI headshot tool that keeps the actual face (flux-pulid instead of pure diffusion)

#showdev #ai #buildinpublic #webdev
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2 min read
Saju vs Western astrology: structural differences founders should know
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Saju vs Western astrology: structural differences founders should know

#saju #ai #koreantech #fortune
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6 min read
é ©å ç ¤è å é å æ â ä å æ å®¢å® æ è ©ç 10 ä ªé ·
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é ©å ç ¤è å é å æ â ä å æ å®¢å® æ è ©ç 10 ä ªé ·

#韩国烤肉 #韩国美食 #中国游客 #礼仪
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1 min read
The fonts that keep YouTube thumbnails readable at phone size
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The fonts that keep YouTube thumbnails readable at phone size

#design #productivity #tutorial #beginners
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2 min read
Amazon product description rules that quietly get listings flagged
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Amazon product description rules that quietly get listings flagged

#ecommerce #marketing #seo #productivity
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2 min read
A no-studio product photography lighting setup that just works
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A no-studio product photography lighting setup that just works

#ecommerce #productivity #tutorial #beginners
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2 min read
How to write a salary counter-offer (the structure recruiters expect)
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How to write a salary counter-offer (the structure recruiters expect)

#career
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4 min read
The 4% rule is a 1994 rule of thumb - here is the assumption it hides
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The 4% rule is a 1994 rule of thumb - here is the assumption it hides

#finance
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4 min read
How to write a wedding poem that sounds like the couple
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How to write a wedding poem that sounds like the couple

#writing #productivity #ai #tutorial
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2 min read
How to write an obituary (the structure funeral homes expect)
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How to write an obituary (the structure funeral homes expect)

#writing #productivity #tutorial #ai
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2 min read
The math behind Saju: 60-year sexagenary cycle explained
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The math behind Saju: 60-year sexagenary cycle explained

#saju #ai #koreantech #fortune
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5 min read
What Your Day Master Says: The One Character That Anchors a Korean Saju Reading
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What Your Day Master Says: The One Character That Anchors a Korean Saju Reading

#korea #beginners #webdev #tutorial
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4 min read
Accessible (Barrier-Free) Travel in Korea in 2026: A Practical Planning Guide
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Accessible (Barrier-Free) Travel in Korea in 2026: A Practical Planning Guide

#korea #travel #a11y #beginners
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4 min read
What virtual staging actually costs in 2026 - and a cheaper per-image option
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What virtual staging actually costs in 2026 - and a cheaper per-image option

#ai #productivity #saas #webdev
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2 min read
How to get a cover letter past the ATS keyword filter (without a subscription)
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How to get a cover letter past the ATS keyword filter (without a subscription)

#career #productivity #ai #webdev
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2 min read
I built a background remover that keeps the fine hair edges
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I built a background remover that keeps the fine hair edges

#showdev #ai #webdev #javascript
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2 min read
I built a tool that gently adds an absent loved one into a family photo
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I built a tool that gently adds an absent loved one into a family photo

#showdev #ai #webdev #saas
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2 min read
I built a cover letter generator that mirrors the actual job posting
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I built a cover letter generator that mirrors the actual job posting

#showdev #ai #webdev #career
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2 min read
I built an AI that stages an empty room from a single phone photo
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I built an AI that stages an empty room from a single phone photo

#showdev #ai #webdev #saas
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2 min read
I built an AI speechwriter for the moments you can't get wrong
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I built an AI speechwriter for the moments you can't get wrong

#showdev #ai #webdev #saas
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2 min read
The Korea T-money Card Guide for 2026 Travelers (Buy, Reload, Save)
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The Korea T-money Card Guide for 2026 Travelers (Buy, Reload, Save)

#travel #korea #guide #tutorial
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5 min read
How to Choose AI Tools in 2026 Without Bloating Your Stack
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How to Choose AI Tools in 2026 Without Bloating Your Stack

#ai #saas #productivity #business
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5 min read
Print-on-Demand Margins in 2026: What Actually Sells and What You Keep
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Print-on-Demand Margins in 2026: What Actually Sells and What You Keep

#ecommerce #business #startup #marketing
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5 min read
The Ten Heavenly Stems and Twelve Earthly Branches: How a Korean Saju Chart Is Actually Built
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The Ten Heavenly Stems and Twelve Earthly Branches: How a Korean Saju Chart Is Actually Built

#korea #beginners #culture #tutorial
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4 min read
Bazi vs Korean Saju: Same Four Pillars, Two Different Readings
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Bazi vs Korean Saju: Same Four Pillars, Two Different Readings

#korea #culture #beginners #history
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4 min read
I Finally Counted My Subscriptions. The Total Was Worse Than I Guessed
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I Finally Counted My Subscriptions. The Total Was Worse Than I Guessed

#money #productivity #personalfinance #saas
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4 min read
I Owned 11 Korean Skincare Products Before I Knew What Order to Use Them
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I Owned 11 Korean Skincare Products Before I Knew What Order to Use Them

#skincare #beauty #kbeauty #selfcare
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4 min read
The Puppy Health Schedule That Actually Sticks: Vaccines and Deworming by Week
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The Puppy Health Schedule That Actually Sticks: Vaccines and Deworming by Week

#dogs #pets #beginners #health
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4 min read
Why 30 million Koreans check Saju before signing contracts
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Why 30 million Koreans check Saju before signing contracts

#saju #ai #koreantech #fortune
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6 min read
What Saju (Korean Four Pillars) reveals about your career timing
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What Saju (Korean Four Pillars) reveals about your career timing

#saju #ai #koreantech #fortune
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5 min read
SupportBridge: AI That Unifies 5 Customer Support Channels Into One Queue — No More Tab-Switching
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SupportBridge: AI That Unifies 5 Customer Support Channels Into One Queue — No More Tab-Switching

#customersupport #ai #automation #saas
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1 min read
StackLens: One Dashboard for Every SaaS Tool Your Team Uses — Stop Context-Switching
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StackLens: One Dashboard for Every SaaS Tool Your Team Uses — Stop Context-Switching

#saas #productivity #devtools #automation
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1 min read
CodeTrust: Stop Shipping AI-Generated Security Holes — Automated Code Audit for Every PR
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CodeTrust: Stop Shipping AI-Generated Security Holes — Automated Code Audit for Every PR

#security #ai #devtools #codesecurity
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1 min read
SaaS Tool Sprawl Is Costing Your Team More Than You Think
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SaaS Tool Sprawl Is Costing Your Team More Than You Think

#productivity #saas #startup #webdev
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4 min read
The Hidden Security Risk of AI-Generated Code (And What to Do About It)
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The Hidden Security Risk of AI-Generated Code (And What to Do About It)

#security #ai #webdev #devops
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4 min read
Cloudflare Workers + Pages + D1 for a Real-Time Fortune Telling App: Architecture and Lessons
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Cloudflare Workers + Pages + D1 for a Real-Time Fortune Telling App: Architecture and Lessons

#cloudflare #javascript #serverless #tutorial
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5 min read
Why Four Pillars of Destiny Has 518,400 Combinations (and Western Astrology Has 12)
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Why Four Pillars of Destiny Has 518,400 Combinations (and Western Astrology Has 12)

#discuss #productivity #webdev #career
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4 min read
Building a Saju (Korean Astrology) API: Technical Deep Dive into Four Pillars Calendar Math
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Building a Saju (Korean Astrology) API: Technical Deep Dive into Four Pillars Calendar Math

#javascript #api #opensource #webdev
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4 min read
Do US Citizens Need a Visa for South Korea in 2026? (And the 2027 K-ETA Change)
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Do US Citizens Need a Visa for South Korea in 2026? (And the 2027 K-ETA Change)

#travel #korea #visa #beginners
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2 min read
Cash or Card in Korea? How Much Cash to Actually Bring in 2026
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Cash or Card in Korea? How Much Cash to Actually Bring in 2026

#travel #korea #money #beginners
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2 min read
Do You Tip in Korea? A Quick, Honest Guide for 2026 Travelers
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Do You Tip in Korea? A Quick, Honest Guide for 2026 Travelers

#travel #korea #tips #beginners
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2 min read
Your 2026 Saju (Korean Four Pillars) Yearly Reading, Explained
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Your 2026 Saju (Korean Four Pillars) Yearly Reading, Explained

#astrology #korea #culture #beginners
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1 min read
How to Read a Korean Saju (Four Pillars) Birth Chart
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How to Read a Korean Saju (Four Pillars) Birth Chart

#astrology #korea #culture #beginners
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1 min read
Unattended Daily Health Checks That Catch the Silent Failures
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Unattended Daily Health Checks That Catch the Silent Failures

#monitoring #devops #automation #python
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3 min read
A Safe Bridge From a Chat Message to an Executed Task
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A Safe Bridge From a Chat Message to an Executed Task

#automation #devops #python #productivity
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3 min read
A Korean Saju (Four Pillars) API that gets the date math right
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A Korean Saju (Four Pillars) API that gets the date math right

#api #korea #webdev #javascript
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4 min read
From Payment Webhook to a Revenue Number You Can Check From Your Phone
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From Payment Webhook to a Revenue Number You Can Check From Your Phone

#webhooks #api #python #saas
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3 min read
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