CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION is a Claude Code environment variable: Environment runner version. Added between v2.1.143 and v2.1.212 and still present in v2.1.294. It is not in the official reference.

Status	Present in v2.1.294
Added	Added between v2.1.143 and v2.1.212
Category	Other
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION=<value>
claude

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

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

Related variables

CLAUDE_CODE_ENVIRONMENT_KIND: Environment: byoc, anthropic_cloud, bridge.
CLAUDE_CODE_VERSION: Exposes the CLI version to subprocesses, hooks, and MCP servers.
CLAUDE_CODE_DESKTOP_APP_VERSION
CLAUDE_RUNNER_ACCOUNT_EMAIL
CLAUDE_RUNNER_ACCOUNT_ID
CLAUDE_RUNNER_ACTIVITY_FD
CLAUDE_RUNNER_ATTEMPT
CLAUDE_RUNNER_CHECKOUT_PATH

Frequently asked questions

What does CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION do?

Environment runner version

Which Claude Code version has CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION?

Added between v2.1.143 and v2.1.212 and still present in v2.1.294.

How do I set CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION?

Export it before starting Claude Code (export CLAUDE_CODE_ENVIRONMENT_RUNNER_VERSION=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.