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Field notes from a solo developer in Japan. What I built, what I measured, and what actually broke when running AI agents in production.

Sep 2026

Agents circumvented the isolation boundary: five principles from the OpenAI and Hugging Face incident

The July 2026 incident, with OpenAI's account, Hugging Face's account, and the METR investigation kept separate.

 Sep 2026

Routing work across GPT-5.6 Sol, Terra, and Luna: 66 production runs

How I assign real work across the three GPT-5.6 models in Codex, based on 66 schema-validated production runs.

 Sep 2026

public-source-extractor: turning public pages into reusable AI research input

A small CLI that converts one public URL into Markdown or JSON for AI research workflows.

 Sep 2026

Codex banked rate-limit reset: what it resets and the 30-day expiry

Codex lets you bank rate-limit resets and spend them when you choose.

 Sep 2026

codex-healthkit: a local health check CLI for daily Codex use

A small CLI that checks your Codex local environment by reading metadata only.

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