The Bash tool can keep a copy of a command's input

The Bash tool is how Claude runs terminal commands. For commands that look like checks, it can now keep a copy of the command's input and pass it along when the command runs. When it keeps that copy, it adds a note about it to the command's error output.

This happens only when a few conditions hold:

• An internal switch is on.
• The shell running the command is bash.
• Something that reads the results from outside the command is present.

The usage data recorded when a Bash command finishes or fails now also notes whether a command was a candidate for this, whether its input was copied and kept, and how many bytes were kept.