CLAUDE_CODE_NO_FLICKER

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_NO_FLICKER is a Claude Code environment variable: Enables flicker-free alternate-screen rendering. The changelog[1] explicitly documents this as CLAUDE_CODE_NO_FLICKER=1. Added between v2.1.87 and v2.1.88 and still present in v2.1.294. It is listed in the official reference.

Status	Present in v2.1.294
Added	Added between v2.1.87 and v2.1.88
Category	Terminal and UI
Official docs	Listed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_NO_FLICKER=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_NO_FLICKER": "<value>"
  }
}

Release notes that mention it

Related variables

CLAUDE_AX_PREPARK_MS
CLAUDE_AX_SCREEN_READER
CLAUDE_AX_STARTUP_QUIET_MS: Startup quiet window (milliseconds) for screen-reader mode.
CLAUDE_CODE_ACCESSIBILITY: Enable accessibility mode; disables cursor hiding.
CLAUDE_CODE_ALT_SCREEN_FULL_REPAINT
CLAUDE_CODE_BLOCKING_LIMIT_OVERRIDE: Override token limit for input blocking.
CLAUDE_CODE_DISABLE_ALTERNATE_SCREEN: Prevents the TUI from using the terminal alternate screen buffer.
CLAUDE_CODE_DISABLE_MOUSE: Disables all mouse input handling in the terminal UI.

Frequently asked questions

What does CLAUDE_CODE_NO_FLICKER do?

Enables flicker-free alternate-screen rendering. The changelog[1] explicitly documents this as CLAUDE_CODE_NO_FLICKER=1.

Which Claude Code version has CLAUDE_CODE_NO_FLICKER?

Added between v2.1.87 and v2.1.88 and still present in v2.1.294.

How do I set CLAUDE_CODE_NO_FLICKER?

Export it before starting Claude Code (export CLAUDE_CODE_NO_FLICKER=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.