Unclear It is not clear when this instruction is given to Claude, or whether it is given at all in normal sessions.
What
While it works, Claude alternates between writing text and making tool calls, meaning requests to do something such as read a file or run a command. Claude Code has an instruction telling Claude that text written between tool calls may not be shown to you. So answers, summaries and finished work must go in the final message, with no tool calls after it. This text changed in this release. The instructions Claude was seen receiving did not change.
Why
Where this applies, Claude's last message is meant to hold everything you need, rather than spreading it across the turn.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear when this instruction is given to Claude, or whether it is given at all in normal sessions.