CLAUDE_CODE_ENABLE_XAA

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_ENABLE_XAA is a Claude Code environment variable: Enables an internal feature flagged as "XAA." The acronym is opaque, but the ENABLE_ prefix and proximity to other experimental flags suggest this is an opt-in capability still under development. Could relate to cross-agent authentication, extended action authorization, or another internal initiative. One to watch. Added between v2.1.79 and v2.1.83 and still present in v2.1.294. It is not in the official reference.

Status	Present in v2.1.294
Added	Added between v2.1.79 and v2.1.83
Category	Feature toggles
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_ENABLE_XAA=<value>
claude

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

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

Release notes that mention it

Claude Code v2.1.83 — 8 New Environment Variables: Security Hardening and the 40-Fix Mega Release

Related variables

CLAUDE_CODE_ENABLE_AWAY_SUMMARY: Enables generation of a summary when the user returns after being away from an active session.
CLAUDE_CODE_ENABLE_CFC: Enable Claude for Chrome browser automation.
CLAUDE_CODE_ENABLE_PROMPT_SUGGESTION: Enables a prompt suggestion feature in the Claude Code UI.
CLAUDE_CODE_ENABLE_SDK_FILE_CHECKPOINTING: Enable file checkpointing in SDK mode.
CLAUDE_CODE_ENABLE_TASKS: Enable the task system.
ENABLE_BETA_TRACING_DETAILED: Enable detailed beta tracing.
ENABLE_BTW: Enable "by the way" suggestions.
ENABLE_PROMPT_CACHING_1H

Frequently asked questions

What does CLAUDE_CODE_ENABLE_XAA do?

Enables an internal feature flagged as "XAA." The acronym is opaque, but the ENABLE_ prefix and proximity to other experimental flags suggest this is an opt-in capability still under development. Could relate to cross-agent authentication, extended action authorization, or another internal initiative. One to watch.

Which Claude Code version has CLAUDE_CODE_ENABLE_XAA?

Added between v2.1.79 and v2.1.83 and still present in v2.1.294.

How do I set CLAUDE_CODE_ENABLE_XAA?

Export it before starting Claude Code (export CLAUDE_CODE_ENABLE_XAA=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.