Build Logs & SaaSWICHI
Railway + Supabase Operational Review
Operational review of WICHI's backend on Railway and Supabase, covering real-world incidents like connection pooling and migration conflicts, plus criteria for infrastructure migration.
Build Logs & SaaS
18 postsLive data and PMF logs from AI products built and operated firsthand — WICHI (GEO SaaS), Make Me Unicorn (OSS), Self-Tuning Loop, and Minbook itself, with decisions recorded chronologically.
Less code, more decision: 9-Bucket framework design, multi-engine architecture transitions, integrating security, observability, and payments — the operational stages tutorials skip.
Written for solo builders shipping their own SaaS or OSS, and PMs and founders wanting to see solo-operation limits and possibilities together. Live numbers and one-line decision notes share the same page.
Build Logs & SaaSWICHI
GEO Score 4-Layer Metric Design
Analysis of the design philosophy and hierarchical dependencies of the four GEO Score layers (Inclusion, Prominence, Quality, Stability), and their implications for decision-making.
Build Logs & SaaSWICHI
Designing the 9-Bucket Query Framework
Documentation of WICHI's 9-Bucket query framework. Defines 3 Zones and 9 Buckets based on brand presence to measure AI's organic recommendations effectively.
All Posts
Build Logs & SaaSWICHI
Railway + Supabase Operational Review
Operational review of WICHI's backend on Railway and Supabase, covering real-world incidents like connection pooling and migration conflicts, plus criteria for infrastructure migration.
Build Logs & SaaSWICHI
GEO Score 4-Layer Metric Design
Analysis of the design philosophy and hierarchical dependencies of the four GEO Score layers (Inclusion, Prominence, Quality, Stability), and their implications for decision-making.
Build Logs & SaaSWICHI
Designing the 9-Bucket Query Framework
Documentation of WICHI's 9-Bucket query framework. Defines 3 Zones and 9 Buckets based on brand presence to measure AI's organic recommendations effectively.
Build Logs & SaaSWICHI
Multi-Engine Architecture — Parallel Collection from 3 AI Search Engines
Analysis of multi-engine architecture design principles that leverage response variance as signals, featuring parallel collection structures and scalability via the adapter pattern.
Build Logs & SaaSMMU
What Happens When You Launch Without Monitoring
A guide to zero-cost minimum monitoring using Sentry and Betterstack, showing how an 80-minute pre-launch investment reduced error response time from 13 hours to 1 hour.
Build Logs & SaaSMMU
Why the Share Feature Comes First in PLG — Designing mmu share
Documenting the psychological mechanisms and viral loop strategies behind three sharing elements designed for MMU's PLG growth: score cards, badges, and custom checklist links.
Build Logs & SaaSMMU
Using Feature Flags to Fix CLI Score Accuracy — Solving the False-Pass Problem
Solving the false-pass problem in MMU's checklist by designing a condition marker system with 17 feature flags and improving score accuracy through 48 regression tests.
Build Logs & SaaSWICHI
Six GEO Business Opportunities and WICHI's Choice
Strategic analysis of three opportunity factors in the AI search (GEO) market and why WICHI chose 'SaaS-based monitoring' over advertising or agency models.
Build Logs & SaaSMMU
Why We Made It Open Source -- The Case Against Closing a Checklist
Why MMU is an MIT open-source CLI, not a paid SaaS. Details the solo builder workflow fit, the 3-tier 'What-How-Auto' revenue model, and explicit validation metrics.
Build Logs & SaaSMMU
Where the 534 Items Came From
Documenting how 534 SaaS launch checklist items were derived from 80 service analyses, 12 guidelines, and 5 real-world failures, including the P0-P3 priority logic.
Build Logs & SaaSMMU
The Code Was Done, But Everything Else Wasn't
Analyzing the difference between 'code complete' and 'product complete' through the 3-week post-feature work (payment stability, security, legal docs, SEO, etc.) which accounted for 88% of the effort.
Build Logs & SaaSWICHI
Prototype to Production — The Complete Change List
10 key changes for transitioning an MVP to commercial SaaS: security hardening, JWT auth, KO/EN i18n, and payment automation to build a 'payment-ready' service.
Build Logs & SaaSWICHI
Jocoding Hackathon Build Log — Building a GEO SaaS in 3 Days
Recording the 3-day MVP build for WICHI during the Jocoding Hackathon, covering tech stack choices (FastAPI, React, Supabase) and priorities for creating a 'working product' under tight deadlines.
Build Logs & SaaSWICHI
Lemon Squeezy vs Stripe — A Korean Solo SaaS Builder's Comparison
Comparative analysis of Lemon Squeezy (MoR) and Stripe for Korean solo SaaS builders, providing a practical guide on global tax compliance, fees, and business registration.
Build Logs & SaaSWICHI
After Hackathon Rejection — Pivoting to Independent SaaS
Recording the 24-hour pivot of WICHI to an independent SaaS after a hackathon rejection, covering i18n implementation, SEO setup, and monetization roadmap restructuring.
Build Logs & SaaSWICHI
Lovable to Vercel — Frontend Migration Record
Migration from Lovable ($25/mo) to Vercel ($0) including build pipeline reconfiguration, documenting the frontend hosting transition process.
Build Logs & SaaSMMU
Solo SaaS Security — The Minimum You Must Do
Essential security checklist for solo SaaS builders. Defense against five critical OWASP Top 10 vulnerabilities and real-world security configuration cases improved for WICHI.
Build Logs & SaaS
Build, Document, Share — The Minbook Manifesto
Personal operational notes from a non-tech AI builder. Build·Document·Share editorial philosophy, three categories, eleven series, and an AI-Augmented editorial policy. The place that records what happens after the 'one-click' moment ends — primary-source operational decisions.