Black Cat Notes

I’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.

On the side, I run a visual branding experiment — anime & aesthetic illustration curated at art.kuroneko-cmd.dev.

Recent Posts

• DevDay Showed Every Move OpenAI Has. Opus 5.5 Needed One.

  30 Sep, 2026

  OpenAI's DevDay 2026 shipped GPT-6.1 Sol, dots, Ultrafast, and a Pro 500 plan. For existing subscribers only two of them matter, and none of it makes up for the usage that was cut in half.

• TravelBrain 2.0: Smart Import, Native iPad, and Dark Mode

  Updated: 30 Sep, 2026

  TravelBrain 2.0 adds private on-device Smart Import, a review-before-save workflow, a native adaptive iPad layout, and System, Light, and Dark appearances.

• TalkMirror 2.0: Five Themes for One Voice Mirror, Now on iPad

  28 Sep, 2026

  TalkMirror 2.0 redraws the whole app in five themes — Default, Paper & Ink, Pixel Arcade, Spotlight, and Night Radio — adds native iPad support, and keeps practice going when you switch headphones. Audio still stays in memory only.

• KeepFlame 2.0: Finish Your Habits, Collect the Cards

  24 Sep, 2026

  KeepFlame 2.0 replaces animated reward scenes with a free 22-card collection earned through daily habits, alongside a redesigned night-sky interface, to-dos, statistics, and Live Activities.