Brief Mode

--brief adds rules for the SendUserMessage tool. Run claude --brief.

Size

Part	Characters
system[0]	78
system[1]	62
system[2]	5,627
messages[0].content[0]	592
messages[0].content[1]	2
messages[1].content[0]	8,850
System blocks only	5,767
Everything shown here	15,501
Tools sent	12

Sizes count the text after the placeholders are in place. Each placeholder counts at its own length.

What to Notice

• --brief changes nothing in the text or the tools in this capture. The brief rules appear only when the SendUserMessage tool exists, and it is not in the tool list here.
• The old wiki lists brief as a section for --brief. The capture does not show it.

Full Text

This variant sends exactly the same text and tools as Default, Lean Prompt. The page for that variant has the full text.

Compared to the Default

The diff below starts from Default, Lean Prompt. Lines that start with - are only in the baseline. Lines that start with + are only here.

There are no differences in the text.

The tool list is the same as the baseline.