Black Cat Notes
SubscribeI’m Kuroneko — building in public. After years working with Japanese companies across manufacturing and IVD for the China market, I pivoted into AI and indie making to ship practical, calm software.
Here I share short takes on AI/product, notes from hands‑on work, and experiments in AI productization, iOS apps & small games, Rust tools, and Python data plumbing. Learn more on my About page.
Recent Posts
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China’s Semaglutide Patent Cliff: Why a Price War Looks Likely
Semaglutide’s China patent cliff meets a crowded biosimilar queue and VBP-style purchasing pressure—tempered only by the real cost floor of injection pens and sterile manufacturing.
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GPT Image 1.5 vs Nano Banana Pro: What My Prompts Actually Showed
GPT Image 1.5 tops Image Arena, but X says it’s worse than Nano Banana Pro. I ran identical prompts—illustration, posters, English/Chinese typography, and a TravelBrain itinerary JSON—to see where each model wins.
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GPT‑5.2-Codex: A Restrained Upgrade With Clearer Priorities
OpenAI’s GPT‑5.2-Codex hits state-of-the-art results on SWE‑Bench Pro and Terminal‑Bench 2.0, improves long-horizon refactors and Windows workflows, and leans hard into defensive cybersecurity.
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TravelBrain: an offline travel planner built from collected inspirations
Why I built TravelBrain as an offline travel planner where you collect ideas into an inbox, drag them onto a timeline, and build trips like LEGO — all without syncing to the cloud.