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Dense business essays and tech insights, written where experience meets code.

The Complete Guide to Computer Specs for AI: From Cloud to Local LLMs (Windows & Mac)
엔지니어링

The Complete Guide to Computer Specs for AI: From Cloud to Local LLMs (Windows & Mac)

What computer do you actually need to run AI and LLMs? Cloud AI like Claude and ChatGPT needs no graphics card, just 32GB of RAM. Running models locally is a different story: a usable 32B model needs 24GB of VRAM or 48GB of Mac unified memory, and 70B and up realistically needs 128GB on a Mac.

·15 min read
When AI Can't Render Korean Text: Background from AI, Text from Code
Image Production

When AI Can't Render Korean Text: Background from AI, Text from Code

AI image generators break Korean text, logos, and exact pixel dimensions. The fix: generate only the background scene with AI (Claude delegates to Codex imagegen), then layer Korean text and logos via HTML with web fonts, captured to PNG with a headless browser. A build log for automating blog illustrations and OG cards.

·9 min read
Why the 1200px Card You Made Became an Unreadable Blob in KakaoTalk
Design

Why the 1200px Card You Made Became an Unreadable Blob in KakaoTalk

Why a carefully crafted OG image turns into a blurry smear in KakaoTalk (Korea's dominant messenger app). The 9px math of canvas vs. render, how gaze-cueing works, URL cache invalidation, and why 7:1 WCAG contrast is the real minimum, all traced back to primary sources.

·10 min read
How Christianity Spread: Dissecting History's Most Successful Growth Marketing
Growth

How Christianity Spread: Dissecting History's Most Successful Growth Marketing

A case study dissecting how early Christianity grew from roughly 1,000 followers to 35 million over 350 years, analyzed through nine growth marketing levers: addressable market, value, price, channel, promotion, segmentation, people, process, and growth engine. Historical figures are academic estimates.

·11 min read
The First Button of Any AI Marketing Agent: A Brand Brief, Not a Smarter Model
Workflow

The First Button of Any AI Marketing Agent: A Brand Brief, Not a Smarter Model

A brand brief is the single shared input for market-research, positioning, growth, and content agents. Without it, every agent fills in its own assumptions which then contradict one another. The secret to a good brief is honestly marking unknown fields as TBD rather than guessing. Includes a 10-section template and a real example.

·10 min read
Making Hundreds of Notes Fast for AI: I Tried Ontology, Then Found Something Lighter
Personal Knowledge Management

Making Hundreds of Notes Fast for AI: I Tried Ontology, Then Found Something Lighter

Hundreds of notes piled up but AI still had to open every file to answer a simple question. I thought a full ontology would fix it. A lightweight index layer built from existing frontmatter turned out to work 2.9-13.3x cheaper. This is the build log.

·16 min read
I Logged In and Every User Property Was undefined: GTM and GA4 from Setup to Revenue Analysis
GTM

I Logged In and Every User Property Was undefined: GTM and GA4 from Setup to Revenue Analysis

·18 min read
Can You Still Retarget Users Who Withdrew Marketing Consent: A Pixel Gating Design Story
Consent Design

Can You Still Retarget Users Who Withdrew Marketing Consent: A Pixel Gating Design Story

·8 min read
How to Make Your Ads Learn Revenue: An Offline Conversion Tracking Case Study
Conversion Tracking

How to Make Your Ads Learn Revenue: An Offline Conversion Tracking Case Study

·16 min read
Kakao SDK

Kakao Share Thumbnail Not Showing? Here's the Fix (JavaScript SDK 2025)

Learn why Kakao Share thumbnails don't appear even with a valid imageUrl, and fix it using scrapImage to convert your URL into a KAGE CDN URL. Step-by-step guide.

·5 min read
Claude Code

How to Generate CRM User Manuals in 20 Minutes with Claude Code Sub-Agents

Learn how Claude Code sub-agents can analyze your CRM codebase and auto-generate user manuals and visual guidebooks in just 20 minutes. See the real-world results.

·6 min read
AI Marketing

GEO Generative Engine Optimization: The Complete 2025 AI Marketing Strategy Guide

Learn what GEO (Generative Engine Optimization) is, how it differs from traditional SEO, and discover 5 proven AI marketing strategies to get cited by AI search engines in 2025.

·5 min read

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