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

• Don't Make Fable 5.1 Your General Contractor

  4 Sep, 2026

  Using Claude Fable 5.1 only to plan and review while Opus or Sonnet subagents write the code saves quota, but the summaries that come back cost you in rework. Split work horizontally, not vertically.

• AI Isn’t Just Replacing Jobs. It’s Raising the Cost of Finding One.

  31 Aug, 2026

  AI makes applications and screening faster, but the resulting flood of synthetic signals is making trust, verification, and access to interviews more expensive.

• OpenAI Paused RL on Its Latest Models. Safety Is Real—and So Is the Business Logic.

  21 Aug, 2026

  OpenAI’s two-week RL pause reflects a genuine cyber risk, but it also sends a commercial signal to regulators and investors.

• Astra Is Delayed. Will Regular Users Get the Full Model?

  8 Aug, 2026

  OpenAI is slowing Astra over cyber risk, but a broad release may still keep its strongest capabilities behind classifiers, access controls, and safer fallback models.