CLAUDE_CODE_ENABLE_CONFIG_MISSING_READ_GUARD

Updated November 2, 2026 by Alex Sorokoletov

CLAUDE_CODE_ENABLE_CONFIG_MISSING_READ_GUARD is a Claude Code environment variable: When set, the config reader treats a missing config file (ENOENT) as a handled not-found result, setting a fallback flag and recording the outcome rather than erroring. Added between v2.1.315 and v2.1.317 and still present in v2.1.317. It is not in the official reference.

Status	Present in v2.1.317
Added	Added between v2.1.315 and v2.1.317
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_CONFIG_MISSING_READ_GUARD=<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_CONFIG_MISSING_READ_GUARD": "<value>"
  }
}

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_MENU_KIND_LANES: When set, groups slash-command menu entries into kind lanes, overriding the default gate.
CLAUDE_CODE_ENABLE_MORNING_BRIEF: Set to enable the morning brief in cowork or remote sessions; read until v2.1.212.
CLAUDE_CODE_ENABLE_NARRATION: Set to false to turn off narration, or to a truthy value to enable it on a 30000 ms interval; read until v2.1.283.
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_SHARE_BUNDLE

Frequently asked questions

What does CLAUDE_CODE_ENABLE_CONFIG_MISSING_READ_GUARD do?

When set, the config reader treats a missing config file (ENOENT) as a handled not-found result, setting a fallback flag and recording the outcome rather than erroring.

Which Claude Code version has CLAUDE_CODE_ENABLE_CONFIG_MISSING_READ_GUARD?

Added between v2.1.315 and v2.1.317 and still present in v2.1.317.

How do I set CLAUDE_CODE_ENABLE_CONFIG_MISSING_READ_GUARD?

Export it before starting Claude Code (export CLAUDE_CODE_ENABLE_CONFIG_MISSING_READ_GUARD=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.