CLAUDE_CODE_EVAL_ALLOW_FLAG_OVERRIDES

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_EVAL_ALLOW_FLAG_OVERRIDES is a Claude Code environment variable. Added between v2.1.229 and v2.1.234 and still present in v2.1.295. It is not in the official reference.

Status	Present in v2.1.295
Added	Added between v2.1.229 and v2.1.234
Category	Terminal and UI
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_EVAL_ALLOW_FLAG_OVERRIDES=<value>
claude

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

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

Related variables

CLAUDE_INTERNAL_FC_OVERRIDES: Internal overrides for function-call (tool-use) behavior.
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.

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_EVAL_ALLOW_FLAG_OVERRIDES?

Added between v2.1.229 and v2.1.234 and still present in v2.1.295.

How do I set CLAUDE_CODE_EVAL_ALLOW_FLAG_OVERRIDES?

Export it before starting Claude Code (export CLAUDE_CODE_EVAL_ALLOW_FLAG_OVERRIDES=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.