https://wonsukchoi.com/en/blog Thoughts on building products, AI, and growing without paid acquisition. en Tue, 04 Aug 2026 19:15:26 GMT https://wonsukchoi.com/en/blog/sovereignty-through-ownership https://wonsukchoi.com/en/blog/sovereignty-through-ownership Every platform you depend on can change its terms, raise its prices, or shut down tomorrow. The antidote isn't diversification, it's ownership. Here's what I learned running a portfolio of sites, a personal AI agent, and 130+ cron jobs on hardware I control. Sun, 02 Aug 2026 23:38:16 GMT https://wonsukchoi.com/en/blog/supabase-cost-shared-vs-per-tenant https://wonsukchoi.com/en/blog/supabase-cost-shared-vs-per-tenant Supabase's pricing tiers aren't the real cost lever — how many projects your architecture needs is. Here's the shared-vs-per-tenant tradeoff from running 13 sites on 5 Supabase projects. Thu, 30 Jul 2026 00:04:16 GMT https://wonsukchoi.com/en/blog/running-hermes-ai-ops-agent https://wonsukchoi.com/en/blog/running-hermes-ai-ops-agent A markdown vault synced across devices, a cron-scheduled agent that runs weekly reflections on my own journal, and the line between script-only jobs and ones that need a real LLM. Here's what's actually running, and what it's caught. Sun, 05 Jul 2026 12:52:46 GMT https://wonsukchoi.com/en/blog/nextjs-multilingual-i18n-seo https://wonsukchoi.com/en/blog/nextjs-multilingual-i18n-seo I built 13-language support into Next.js App Router for UX, not SEO. Here's the full setup: typed translations, ISR, hreflang, noindex strategy, and what actually happened to traffic. Sun, 07 Jun 2026 17:59:27 GMT https://wonsukchoi.com/en/blog/coolify-vs-vercel-real-cost https://wonsukchoi.com/en/blog/coolify-vs-vercel-real-cost I moved 8 apps from Vercel to Coolify — from $50+/mo to $30/mo. Full cost breakdown, what you actually give up, and who should stick with Vercel. Sun, 07 Jun 2026 17:48:34 GMT https://wonsukchoi.com/en/blog/ai-coding-workflow-2026 https://wonsukchoi.com/en/blog/ai-coding-workflow-2026 I run more than 10 production apps as one developer. Here's how AI fits into my actual daily workflow: the tools, the patterns, what moved the needle, and what I stopped using. Wed, 13 May 2026 17:34:29 GMT https://wonsukchoi.com/en/blog/type-safe-nextjs-app-router https://wonsukchoi.com/en/blog/type-safe-nextjs-app-router App Router introduced async params, server actions, and new patterns for forms and mutations — and TypeScript support for all of it has sharp edges. Here are the patterns I use to keep things type-safe without fighting the framework. Wed, 13 May 2026 08:41:08 GMT https://wonsukchoi.com/en/blog/supabase-multi-tenancy-production https://wonsukchoi.com/en/blog/supabase-multi-tenancy-production How to build multi-tenant SaaS on a single Supabase database — covering tenant_id schema design, RLS policies with JWT claims, middleware tenant resolution, and the production gotchas that cost the most time. Wed, 13 May 2026 08:38:50 GMT https://wonsukchoi.com/en/blog/knowledge-base-chat-supabase-claude https://wonsukchoi.com/en/blog/knowledge-base-chat-supabase-claude A complete walkthrough of building a RAG-based knowledge base chat: pgvector schema, embedding models, the retrieval function, chunking strategy, and the Claude prompt pattern — including the gotchas that cause silent failures. Thu, 30 Apr 2026 01:35:00 GMT https://wonsukchoi.com/en/blog/personal-ai-knowledge-base https://wonsukchoi.com/en/blog/personal-ai-knowledge-base I built an AI that can represent me accurately on my personal site — not with RAG or vector search, but with a simpler pattern that works better at this scale. Here's the architecture, the tradeoffs, and what building a real knowledge base about yourself actually involves. Wed, 29 Apr 2026 21:34:11 GMT https://wonsukchoi.com/en/blog/running-7-products-solo-ai-delegation https://wonsukchoi.com/en/blog/running-7-products-solo-ai-delegation The bottleneck in running multiple products solo isn't hours — it's attention. Here's what I actually delegate to AI across seven live products, what I don't, and what the real productivity gain looks like. Wed, 29 Apr 2026 21:34:11 GMT https://wonsukchoi.com/en/blog/supabase-rls-production-patterns https://wonsukchoi.com/en/blog/supabase-rls-production-patterns Battle-tested RLS from 7 production Supabase apps. Covers jwt.claims patterns that actually work, multi-tenant isolation without policy sprawl, and the silent data leaks most developers only find in prod. Wed, 29 Apr 2026 21:31:00 GMT https://wonsukchoi.com/en/blog/ai-seo-2026-whats-working https://wonsukchoi.com/en/blog/ai-seo-2026-whats-working AI SEO is real and it matters — but most advice about it is wrong. Here's what's actually moving the needle across my sites in 2026: the signals that work, the tactics that don't, and what I actually do. Wed, 29 Apr 2026 21:20:22 GMT https://wonsukchoi.com/en/blog/freelance-clients-without-ads https://wonsukchoi.com/en/blog/freelance-clients-without-ads Most advice about getting freelance clients involves spending money on ads or cold-pitching strangers. Here's what actually worked for me: the channels, the positioning, and the specific moves that bring in inbound work. Wed, 29 Apr 2026 21:14:49 GMT https://wonsukchoi.com/en/blog/nextjs-app-router-caching https://wonsukchoi.com/en/blog/nextjs-app-router-caching Next.js v15 silently changed all caching defaults. Here's how the 4 caches work, what breaks without warning, and the patterns I use in every production app. Wed, 29 Apr 2026 21:11:43 GMT https://wonsukchoi.com/en/blog/multilingual-seo-i18n-guide https://wonsukchoi.com/en/blog/multilingual-seo-i18n-guide Multi-language websites unlock SEO traffic most sites never see. Here's the full picture: why it matters, how to implement it technically, and the infrastructure decision that most developers get wrong. Thu, 23 Apr 2026 19:28:54 GMT https://wonsukchoi.com/en/blog/llms-txt-ai-seo https://wonsukchoi.com/en/blog/llms-txt-ai-seo Most llms.txt files go stale on publish. Here's the dynamic approach I switched to and what actually matters for AI search visibility in 2026. Thu, 23 Apr 2026 19:07:06 GMT https://wonsukchoi.com/en/blog/multi-tenant-saas-single-supabase-database https://wonsukchoi.com/en/blog/multi-tenant-saas-single-supabase-database How I run seven branded sites — one Next.js codebase, one Supabase project. A practical walkthrough of hostname resolution, feature flags, data isolation with RLS, and tenant-aware routing. Tue, 21 Apr 2026 17:26:40 GMT https://wonsukchoi.com/en/blog/personal-ops-dashboard-nextjs-supabase https://wonsukchoi.com/en/blog/personal-ops-dashboard-nextjs-supabase A look inside the private Next.js dashboard I built to manage 13 live sites — site status monitoring, personal AI, offline-capable notes, multi-tenant architecture, and more. Tue, 21 Apr 2026 17:21:53 GMT https://wonsukchoi.com/en/blog/migrate-react-to-nextjs https://wonsukchoi.com/en/blog/migrate-react-to-nextjs Step-by-step migration for CRA, Vite, and custom webpack: routing, SSR, data fetching, images, and the gotchas most guides skip. Mon, 20 Apr 2026 21:25:02 GMT