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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

← All of v2.1.221 Home All releases ←olderv2.1.220 v2.1.222newer→
Claude Code v2.1.221

Explore/plan agents no longer read a remote gate

Use it now
Useful4 Signal0
Agents Notable not in their notes

Explore and plan agents are now always on unless you set the disable environment variable yourself.

Feature flag
tengu_slate_ibis Gate removed from the code

This release deleted the gate from the code while it was still reading on for the account this site reads, so the code path no longer asks a flag before running.

This account: on · anonymous baseline: on · compiled default in v2.1.221: not a boolean we can read

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.221. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_DISABLE_EXPLORE_PLAN_AGENTS
What

The flag controlling explore/plan agents is computed purely from the environment.

Details
  • v2.1.220 memoized getFeatureValue_CACHED_MAY_BE_STALE("tengu_slate_ibis", !0) after checking the env opt-out; that call and the gate name are gone from the bundle.
  • Set CLAUDE_CODE_DISABLE_EXPLORE_PLAN_AGENTS to disable.
Evidence

CLAUDE_CODE_DISABLE_EXPLORE_PLAN_AGENTS

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.221 →