CLAUDE_CODE_NO_FLICKER
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.138, including the newest one read.
What it is
Set to 1 to enable [fullscreen rendering](/docs/en/fullscreen), a research preview that reduces flicker and keeps memory flat in long conversations. Overrides the [tui](/docs/en/settings-reference#tui) setting; you can also switch with /tui fullscreen
Anthropic's own wording. Read off Environment variables, captured 2026-08-28.
Presence across releases
| Releases | Reading | Declared type | Default |
|---|---|---|---|
| 2.1.245 – 2.1.250 5 releases | never mined | — | — |
| 2.1.162 – 2.1.243 73 releases | in the build | triBool | — |
| 2.1.160 – 2.1.161 2 releases | in the build | bool | — |
| 2.1.138 – 2.1.159 20 releases | in the build | — | — |
A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.
Changelog entries naming it
-
v2.1.236Fullscreen is offered as a trial, and turns itself off after repeated failed launches
Accepting fullscreen now runs as a trial, and two crashed launches disable it on that machine.
named in this entry
Documentation pages
- Environment variables reference table Claude Code CLI
- Fullscreen rendering mentions it Claude Code CLI
- Claude Code settings mentions it Claude Code CLI
- Claude Code settings reference mentions it Claude Code CLI
- Configure your terminal for Claude Code mentions it Claude Code CLI
- Week 14 · March 30 – April 3, 2026 mentions it Claude Code CLI
A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.
Names beside it
Every environment variable in the inventory starting claude_code_no, up to twelve of them.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the environment variable does. All environment variables.