CLAUDE_CODE_RESUME_PROMPT00

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_RESUME_PROMPT00 is a Claude Code environment variable. Removed between v2.1.229 and v2.1.234, so current releases ignore it. It is not in the official reference.

Status	Removed between v2.1.229 and v2.1.234
Added	Added in v2.1.229
Category	Sessions
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_RESUME_PROMPT00=<value>
claude

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

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_RESUME_PROMPT00": "<value>"
  }
}

Related variables

CLAUDE_CODE_RESUME_FROM_SESSION: Instructs Claude Code to bootstrap a new session's context from an existing session ID.
CLAUDE_CODE_RESUME_INTERRUPTED_TURN: Resume an interrupted agent turn.
CLAUDE_CODE_RESUME_INTERRUPTED_TURN_MAX_AGE_MS
CLAUDE_CODE_RESUME_PROMPT: Set the prompt injected when resuming a session.
CLAUDE_CODE_RESUME_THRESHOLD_MINUTES: Sets the time window (in minutes) during which a session is eligible for automatic resume.
CLAUDE_CODE_RESUME_REASON
CLAUDE_CODE_RESUME_SOURCE_ALIVE
CLAUDE_AUTO_BACKGROUND_TASKS: Enable automatic background task execution.

Frequently asked questions

Which Claude Code version has CLAUDE_CODE_RESUME_PROMPT00?

Removed between v2.1.229 and v2.1.234, so current releases ignore it.

How do I set CLAUDE_CODE_RESUME_PROMPT00?

Export it before starting Claude Code (export CLAUDE_CODE_RESUME_PROMPT00=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.