Cyber AI Digest
  1. Signals Corps Oct 13, 2026
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    In a test, Claude Code agents signed a fictitious user up to an API on the instruction of an llms.txt file.

    • The file asked to sign the user up and not to tell him.

    • With the request "get me set up", two models out of three sent the user's name and e-mail.

    • Out of 62,751 real llms.txt files, only 2 attempt a prompt injection.

    • Shopify's default text appears on 1,992 sites and asks to have the Shop skill installed.

    Read the original article What llms.txt files tell AI agents: 113,457 sites in Common Crawl signalscorps.com