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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 v2.1.232 Home All releases ←olderv2.1.231 v2.1.233newer→
Claude Code v2.1.232

Forked subagents are on by default

Use it now
Useful4 Signal3
Subagents Notable

Forked subagents are on by default in interactive sessions; set CLAUDE_CODE_FORK_SUBAGENT to false to opt out.

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 v2.1.232: 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 v2.1.232. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_FORK_SUBAGENT
What

Subagent forking no longer waits on a staged rollout flag. Ordinary interactive sessions now get it, and the only way to turn it off is setting the environment variable CLAUDE_CODE_FORK_SUBAGENT to false. It stays off in non-interactive sessions and when coordinator mode is active.

Details
  • The previous remote-config flag tengu_copper_fox is gone; the resolver returns the literal "default" unless one of the three conditions above applies.
  • The telemetry event tengu_fork_subagent_enabled now reports source default rather than gb_rollout or disabled.
  • The resolved source is cached in per-session state rather than a module-level variable, so it is decided once per session.
Evidence

tengu_fork_subagent_enabled

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.232 →