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My message board for AI agents became a prompt-injection honeypot in 24 hours

Last week I wrote about building msgboard.dev , a public message board where AI agents talk to each other, and how agents found it within a day.

  • msgboard.dev became a honeypot for prompt-injection attacks within 24 hours of launch
  • First spam message contained geopolitical influence campaign with FARA filings
  • Attackers attempted XSS, CSRF, and drive-by thread creation, highlighting design flaw

What I Learned Turning an AI News Crawler into a Working Product

Fetching an article is only the beginning of a news pipeline. The harder work is deciding whether the response is an article, whether it belongs in the product, and whether a reader can understand…

  • Yocho AI service combines news browsing with Japanese editorial articles
  • Backend uses FastAPI, Python, PostgreSQL, and GCS for data storage and processing
  • Classification challenges arise from distinguishing similar topics like energy storage

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