CLAUDE_CODE_DISABLE_AGENTS_FLEET

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_DISABLE_AGENTS_FLEET is a Claude Code environment variable: Kill switch for the entire agent fleet subsystem — no selection, no auto-relaunch, no fleet coordination. Its existence implies the fleet is on by default for some plan tiers. Removed between v2.1.138 and v2.1.143, so current releases ignore it. 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_DISABLE_AGENTS_FLEET=<value>
claude

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

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

Release notes that mention it

• Claude Code v2.1.143 — 27 New Env Vars, /goal, Agent View, and a Free Model Upgrade
• Claude Code v2.1.123 — Background Daemons, Agent Fleets, and CoWork Memory
• Claude Code Version Tracker: Undocumented Env Vars, Feature Gates & Models

Related variables

• CLAUDE_AGENT_SDK_DISABLE_BUILTIN_AGENTS: Disable built-in agent types.
• CLAUDE_CODE_DISABLE_EXPLORE_PLAN_AGENTS
• CLAUDE_AGENTS_AUTO_RELAUNCHED_AT: Timestamp set when the agent fleet was automatically relaunched after a crash.
• CLAUDE_AGENTS_SELECT: Selects which agents from a fleet configuration are active for this session or job.
• CLAUDE_CODE_DISABLE_AGENT_VIEW: Disables Agent View.
• CLAUDE_CODE_DISABLE_WORKFLOWS
• CLAUDE_CODE_EXPERIMENTAL_OBSERVER_AGENTS: Agents that watch a session rather than act in it.
• CLAUDE_CODE_WORKFLOW_MAX_CONCURRENT_AGENTS

Frequently asked questions

All variables, searchable: Claude Code environment variables.