CLAUDE_CODE_GB_DISK_CACHE_WHEN_TELEMETRY_OFF

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_GB_DISK_CACHE_WHEN_TELEMETRY_OFF is a Claude Code environment variable: Opts GrowthBook (GB) flag data back into the on-disk cache under a telemetry-off profile, where feature-flag caching would otherwise be skipped. Shipped v2.1.211, undocumented — a reliability knob for flag evaluation in privacy-restricted deployments. Added between v2.1.143 and v2.1.212 and still present in v2.1.294. It is not in the official reference.

How to set it

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

export CLAUDE_CODE_GB_DISK_CACHE_WHEN_TELEMETRY_OFF=<value>
claude

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

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

Release notes that mention it

• claude-code-env-vars-v2-1-212

Related variables

• CLAUDE_CODE_ENABLE_TELEMETRY: Enable telemetry collection.
• CLAUDE_CODE_ENHANCED_TELEMETRY_BETA: Enable enhanced telemetry (beta).
• DISABLE_TELEMETRY: All telemetry.
• ENABLE_ENHANCED_TELEMETRY_BETA: Enable enhanced telemetry (beta).
• CLAUDE_CODE_BYOC_ENABLE_DATADOG: Opt-in Datadog telemetry for BYOC (Bring Your Own Cloud) Bedrock/Vertex deployments.
• CLAUDE_CODE_DATADOG_FLUSH_INTERVAL_MS: Datadog metrics flush interval (ms).
• CLAUDE_CODE_DISABLE_FEEDBACK_SURVEY: Survey prompts.
• CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL: Re-enables the session quality survey for enterprise deployments with OTEL enabled.

Frequently asked questions

All variables, searchable: Claude Code environment variables.