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  • Agents inside a person’s browser are invisible at the HTTP level. Agentic browsers and extensions that run in a person’s own browser send that browser’s requests.
  • Some products share an identity. Codex has been reported to fetch as ChatGPT-User, and Cursor through Exa as ExaUser. Results name only what can be proven.
  • Logs lose information. Classifying stored logs from the user agent alone can’t catch agents that borrow a browser user agent. See Querying your logs.
  • Very old browsers and feature phones count as bots. User agents without a modern rendering-engine token, like Amiga browsers or MIDP phones, fall through to bot.