はてなブックマーク - Claude Code Is Steganographically Marking Requests https://b.hatena.ne.jp/entry/s/thereallo.dev/blog/claude-code-prompt-steganography Most devs give their harnesses ridiculous access. FS, shell, git, browser access, even computer use nowadays. That is the whole point. They need enough context to do useful work. That also means th... shun9167 https://b.hatena.ne.jp/shun9167/20260703#bookmark-4789528140520992130 2026-07-03T09:46:45Z noskwnosky118 https://b.hatena.ne.jp/noskwnosky118/20260703#bookmark-4789528140520992130 2026-07-02T19:59:49Z mkusaka https://b.hatena.ne.jp/mkusaka/20260701#bookmark-4789528140520992130 Claude Code 2.1.196がANTHROPIC_BASE_URLとtimezoneでシステム日時文の記号を変え、API経路情報をステガノグラフィで隠すと指摘。 2026-07-01T08:33:44Z AI要約 prompt隠蔽 system側 Unicode 隠し指標 プライバシー door-s-dev https://b.hatena.ne.jp/door-s-dev/20260701#bookmark-4789528140520992130 2026-07-01T00:38:35Z