Source Intelligence

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 v2.1.117 Home All releases olderv2.1.116 v2.1.118newer
Claude Code v2.1.117

Fork Subagent Feature Gate [Gradual Rollout]

Feature flag
tengu_copper_fox Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.117: no gate table built for this version

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 v2.1.117. It isn't a statement about your account. What a flag value here can and cannot tell you

What

The /fork command's availability is additionally controlled by a server-side feature flag.

Status

Gated by tengu_copper_fox flag (defaults to !1), but can be overridden with CLAUDE_CODE_FORK_SUBAGENT environment variable.

Details
  • When the flag is disabled and the env var is not set, the fork tool is not loaded
  • Setting CLAUDE_CODE_FORK_SUBAGENT=1 provides a local override
Evidence

Fork feature gate (search for "tengu_copper_fox") — MG at line ~381717

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

See this entry in the whole of v2.1.117 →