CLAUDE_CODE_COORDINATOR_EXTRA_TOOLS

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_COORDINATOR_EXTRA_TOOLS 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_COORDINATOR_EXTRA_TOOLS=<value>
claude

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

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

Related variables

• CLAUDE_CODE_COORDINATOR_MODE: Runs a session as a coordinator over child agents, with companions for its toolset and whether memory flows down the tree.
• CLAUDE_CODE_COORDINATOR_FORCE_WORKER_INHERIT_MODEL
• CLAUDE_CODE_COORDINATOR_PROPAGATE_NESTED_MEMORY
• CLAUDE_CODE_COORDINATOR_SKILL_GUIDANCE
• CLAUDE_CODE_COORDINATOR_WORKER_CHECKIN_SECONDS
• CLAUDE_AGENT: Short-form identifier for the current agent, used in inter-agent messaging and log attribution.
• CLAUDE_AGENT_SDK_CLIENT_APP: Client application name.
• CLAUDE_AGENT_SDK_DISABLE_BUILTIN_AGENTS: Disable built-in agent types.

Frequently asked questions

All variables, searchable: Claude Code environment variables.