Claude Code Just Fixed Terminal Flickering (How to Enable NO_FLICKER Mode)

The old renderer redraws the entire screen on every update, causing visible flickering NO_FLICKER mode uses a virtual viewport that only patches changed characters Enable it with CLAUDE_CODE_NO_FLICKER=1 claude or add export to.zshrc Bonus: mouse, cleaner copy-paste, lower CPU on long sessions Still experimental but most Anthropic internal users already prefer it The Flickering Problem If you use Claude Code daily, you know this one. You ask a question, the response starts streaming, and your terminal screen starts flashing. Every new token triggers a full redraw.