CLAUDE_CODE_RESUME_SOURCE_ALIVE

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_RESUME_SOURCE_ALIVE is a Claude Code environment variable. Added between v2.1.143 and v2.1.212 and still present in v2.1.295. 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_RESUME_SOURCE_ALIVE=<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_SOURCE_ALIVE": "<value>"
  }
}

Release notes that mention it

• claude-code-env-vars-v2-1-212

Related variables

• CLAUDE_BG_SOURCE: Tags where a background job originated: CLI, SDK, Remote Control, another agent.
• 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_BRIDGE_SOURCE_DIR
• CLAUDE_CODE_RESUME_PROMPT00

Frequently asked questions

All variables, searchable: Claude Code environment variables.