Command reference ยท Claude Code
/fast
Turns Fast mode on or off.
Non-interactive (-p) only in sessions started with fastMode in --settings; the toggle only applies to the session. Requires v2.1.205+.
โ WHEN TO USE IT?
Prioritize speed over depth for a series of simple, repetitive edits
/fast for a run of similar, simple changes
Turn fast mode back off once more complex tasks come up
call /fast again to toggle it back
โ WHEN NOT TO?
Non-interactive use without fastMode in the start settings
non-interactive (-p) toggling of /fast only works in sessions started with fastMode set in --settings
Better: pass fastMode directly in --settings when starting the session
SOURCES
- Claude Code Doku (offiziell) โ code.claude.com