Tech on Architect PARK JUN WOOhttps://www.parkjunwoo.com/tech/Recent content in Tech on Architect PARK JUN WOOHugoenFri, 24 Apr 2026 13:00:00 +0900toulmin — A Rule Engine That Computes Contractshttps://www.parkjunwoo.com/tech/toulmin/Sun, 22 Mar 2026 10:00:00 +0900https://www.parkjunwoo.com/tech/toulmin/Rule engines have treated their validation targets as facts for 60 years. toulmin treats them as claims. An implementation of Toulmin’s argumentation model as a Go rule engine.filefunc — One File, One Concepthttps://www.parkjunwoo.com/tech/filefunc/Mon, 16 Mar 2026 13:50:00 +0900https://www.parkjunwoo.com/tech/filefunc/The navigation unit for an AI code agent is the file. filefunc is a Go code structure convention and CLI tool that enforces one concept per file.Feature Chain — Tracing the full stack with one operationIdhttps://www.parkjunwoo.com/tech/feature-chain/Fri, 13 Mar 2026 10:00:00 +0900https://www.parkjunwoo.com/tech/feature-chain/Which files do you need to touch to modify a single feature? Feature Chain takes one operationId and automatically extracts the entire scope — API spec, DB schema, authorization policy, state diagram, function implementations, test scenarios, and frontend.whyso — What git blame doesn't tell youhttps://www.parkjunwoo.com/tech/whyso/Thu, 12 Mar 2026 10:00:00 +0900https://www.parkjunwoo.com/tech/whyso/git blame tells you who changed what and when. whyso tells you why. A tool that automatically extracts per-file change history from Claude Code session data.Climate Change Solution in Space? Yes, Really.https://www.parkjunwoo.com/tech/space-sunshade-climate-control/Sun, 08 Mar 2026 09:00:00 +0900https://www.parkjunwoo.com/tech/space-sunshade-climate-control/Install a sunshade between the Sun and Earth to reverse the climate. Skip the coating on a Dyson mirror factory line and out comes a shade. No propellant needed — it flies itself. Remove it and everything goes back to normal. The math checks out.SSaC — Service Sequences as Codehttps://www.parkjunwoo.com/tech/ssac/Sat, 07 Mar 2026 09:00:00 +0900https://www.parkjunwoo.com/tech/ssac/A language-independent concept that decomposes business flows inside service functions into declarative blocks (sequences). Declare only what with 10 fixed types, and the codegen fills in how.First Principles Thinking with AI: A 5-Step Method with Case Studieshttps://www.parkjunwoo.com/tech/first-principles-ai-thinking/Thu, 26 Feb 2026 02:00:00 +0900https://www.parkjunwoo.com/tech/first-principles-ai-thinking/Don’t ask AI for answers. Use it as a sounding board to validate, dismantle, and rebuild your assumptions. A 5-step method with two real-world case studies.Cooking with Waste Heat? The Potential and Reality of Waste Heat Recovery Heat Pump Cooking Applianceshttps://www.parkjunwoo.com/tech/waste-heat-recovery-heat-pump-cooker/Sun, 15 Feb 2026 00:30:00 +0900https://www.parkjunwoo.com/tech/waste-heat-recovery-heat-pump-cooker/High-temperature heat pump technology that dramatically reduces energy waste in conventional cooking appliances — how far has it come, and how can we make it better?Building Dams from Desert Sand — and Turning Them into Forests 30 Years Laterhttps://www.parkjunwoo.com/tech/oasis-pellet-sand-dam/Sat, 14 Feb 2026 16:40:41 +0900https://www.parkjunwoo.com/tech/oasis-pellet-sand-dam/A proposal for Oasis Pellet technology: binding worthless desert sand with bio-adhesive to create water tanks that, at end of life, decompose into fertile soil.How a Fire-Proof Battery Turns Wasted Electricity into Fertilizer and Heatinghttps://www.parkjunwoo.com/tech/iron-nickel-ess-rural-energy/Sat, 14 Feb 2026 15:39:09 +0900https://www.parkjunwoo.com/tech/iron-nickel-ess-rural-energy/Storing electricity wasted by solar curtailment in fire-free Edison batteries, then producing fertilizer and urea solution (DEF) from hydrogen — an energy-agriculture convergence model for self-sufficiency.