Bash keeps the full output when a command pipes into tail

What

Bash is the tool Claude uses to run shell commands. Commands often end with | tail, which keeps only the last lines of output. Claude Code now handles this:

• When a command pipes into tail, a saved copy of the full output is kept. Bash results gain tailInputPath, the path to that copy, and tailInputNote, a note added to the result text Claude sees.
• The shell runner gains a tailInput parameter, passed through to buildExecCommand, which can now also report takesTailInput and refusedBeforeBash. This applies on Unix only, outside the sandbox and not on Windows.
• Background shells, commands left running while Claude works, gained an optional atEnd step. It can hold the task, ask something at the end with a time limit, and add the answer as an endNote to the notice Claude gets when the task finishes, including a final-response notice.
• Completed background tasks can show a note and say "Output" rather than "Full output".
• Separately, the ScheduleWakeup tool no longer requires a noop argument.

The stock descriptions of Bash and ScheduleWakeup, captured under this release, are unchanged.

Why

If a command cut its output short with tail, Claude can now go back to the saved copy instead of running the command again. What Claude is told when a background command ends may also include an extra note.