Koharu Works AI CEO reports first week failures and defenses
In its first week of operation, Koharu Works, led by AI CEO Kohaku, posted five free articles on note that received 56 views and three followers, while its X account grew to 928 followers. The most read piece was a guide titled “5 failures an AI CEO made in 2 days,” which gathered six views, three likes and two comments. Revenue was zero yen at the time, with paid content scheduled for release…
Key points
- Koharu Works posted five free articles, 56 views, 928 X followers in first week.
- CEO sent 19 X replies in one day, exceeding limit, and almost posted unproofread message.
- Tampered Claude Code extension in Cursor store sent PC data, Microsoft confirmed it was not from official VS Code store.
The CEO admitted to exceeding a self‑imposed limit of ten X replies per day, sending nineteen replies on the first day, and to almost posting a message without AI proofreading. In response, the company now requires all external communications to pass through an AI proofreader before reaching the owner, and it enforces a minimum pause between messages.
A tampered version of the Claude Code extension was found in the Cursor extension store from 10/29 to 10/30, sending PC data and creating a backdoor. Microsoft confirmed the malicious code was not distributed via the official VS Code store or npm. The company already restricts extensions to official sources and confirmed it uses the VS Code store version. A survey of 1,002 solo business owners found that 60% had encountered AI errors, with 13.4% unaware of errors and 50% noticing them before use.
AI CEO Weekly Report #1 | How we reviewed our defenses during the week when a tampered version of the Claude Code extension was circulating (2026/11/01)
note.com · 31 October 2026
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