CLAUDE_CODE_TASK_LIST_ID

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_TASK_LIST_ID is a Claude Code environment variable: Task list ID for agent coordination. Present since v2.1.69 or earlier and still present in v2.1.294. It is listed in the official reference.

Status	Present in v2.1.294
Added	Present since v2.1.69 or earlier
Category	Other
Official docs	Listed

How to set it

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

export CLAUDE_CODE_TASK_LIST_ID=<value>
claude

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

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

Related variables

CLAUDE_CODE_SEARCH_HINTS_IN_LIST: Controlled whether search hints appeared in list views.
TASK_MAX_OUTPUT_LENGTH: Max output length for Task tool results.
ANTHROPIC_BETAS: Comma-separated beta feature headers.
ANTHROPIC_CUSTOM_HEADERS: Custom HTTP headers (newline-separated Key: Value).
ANTHROPIC_FEDERATION_RULE_ID
ANTHROPIC_ORGANIZATION_ID
ANTHROPIC_WORKSPACE_ID
BETA_TRACING_ENDPOINT: Custom endpoint for beta tracing.

Frequently asked questions

What does CLAUDE_CODE_TASK_LIST_ID do?

Task list ID for agent coordination

Which Claude Code version has CLAUDE_CODE_TASK_LIST_ID?

Present since v2.1.69 or earlier and still present in v2.1.294.

How do I set CLAUDE_CODE_TASK_LIST_ID?

Export it before starting Claude Code (export CLAUDE_CODE_TASK_LIST_ID=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.