Per operator review on the PR: the prose marker list ('new password is:',
' to:', 'changed to:', etc.) was speculative — built from a misread
screenshot, not a real reply. The conduit admin bot always code-spans the
password, so the backtick anchor is the verified, complete format. Removing
the markers leaves a ~15-line function that's honest about what it parses.
If a non-code-span format ever appears, extract_new_password returns None and
the diagnostic logging in admin_room_send_and_poll records the raw body, so a
real format change is visible — far better than a speculative marker silently
mis-parsing it. Tests now cover the live format, symbol passwords, the
code-spanned-user-id error guard, and the no-codespan / non-password cases.
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