CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL is a Claude Code environment variable: Enables the experimental Advisor Tool — a server-side tool with its own advisorModel config option. Requires first-party auth; falls back to the tengu_sage_compass2 gate. "Sage" / "Compass" codenames have previously mapped to deep-research capabilities. Added between v2.1.108 and v2.1.114 and still present in v2.1.294. It is not in the official reference.

Status	Present in v2.1.294
Added	Added between v2.1.108 and v2.1.114
Category	Shell and tools
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL=<value>
claude

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

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

Release notes that mention it

Claude Code v2.1.114 — Native Binary Launcher, /fewer-permission-prompts, and 20 New Environment Variables

Related variables

CLAUDE_CODE_DISABLE_ADVISOR_TOOL: Disables what appears to be an internal advisory tool.
ENABLE_LSP_TOOL: Enable Language Server Protocol tool.
ENABLE_TOOL_SEARCH: Tool search/deferred loading: auto, true, false, or 0–100%.
CLAUDE_CODE_EMIT_TOOL_USE_SUMMARIES: Emit tool use summary events.
CLAUDE_CODE_ENABLE_TODO_TOOLS
CLAUDE_CODE_MAX_TOOL_USE_CONCURRENCY: Max concurrent tool executions; default 10.
CLAUDE_CODE_TOOL_MEMORY_CGROUP_EXCLUDE
CLAUDE_CODE_TOOL_MEMORY_LIMIT

Frequently asked questions

What does CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL do?

Enables the experimental Advisor Tool — a server-side tool with its own advisorModel config option. Requires first-party auth; falls back to the tengu_sage_compass2 gate. "Sage" / "Compass" codenames have previously mapped to deep-research capabilities.

Which Claude Code version has CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL?

Added between v2.1.108 and v2.1.114 and still present in v2.1.294.

How do I set CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL?

Export it before starting Claude Code (export CLAUDE_CODE_ENABLE_EXPERIMENTAL_ADVISOR_TOOL=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.