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Practical guides

Step-by-step guides with tables and FAQs. Numbers come from official sources, with the date we checked them.

• Claude for Small Product Businesses: Labels, Margins, ReviewsFour no-code Claude workflows for small product sellers: label copy checks, wholesale proposals with margin tables, competitor review analysis and a weekly check.
• Cut AI Token Costs: Context, Model Split, Caching, Cost TrackingPractical ways to lower Claude API bills: send only needed documents, split steps across models, cache a project summary and track cost per task. Current prices included.
• Immich on Proxmox with a ZFS Mirror: Setup and 3-2-1 BackupStep-by-step Immich photo server on Proxmox: ZFS mirror, VM sizing from the official requirements, Docker Compose install and a 3-2-1 backup that includes database dumps.
• Mutation Testing False Kills: Baselines, File Access, Kill ReasonsWhy mutation scores get inflated by false kills and three checks to catch them: a pristine-copy baseline, proof the mutated file was read, and the kill-reason distribution.
• Korea Take-Home Salary 2026: Deductions, Rates and ExamplesHow a Korean annual salary becomes monthly take-home pay in 2026: pension, health, long-term care, employment insurance and income tax, with official rates and example amounts.
• Jeonse vs Wolse Explained: Protecting Your Deposit as a ForeignerJeonse, wolse and ban-jeonse in Korea explained, plus the steps that protect your deposit: address report, fixed date and guarantee insurance, with notes for registered foreigners.
• Unemployment Benefits for Foreigners in Korea (2026)Which visas are covered by Korean employment insurance, 2026 daily maximum and minimum unemployment benefit, benefit periods and how foreign workers apply.
• Korean Contests Open to Foreigners: How to Find and EnterHow to read Korean contest eligibility rules as a foreign resident, plus an hourly-updated list of open Korean contests whose rules mention foreigners.