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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.232 ·

Forked subagents are on by default

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

Use it now Notable New Features
JSON All of v2.1.232
Use it nowTier: how much it should matter to you
4Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SubagentsArea: what it touches
New FeaturesKind: in v2.1.232,
What probably matters to youSection of the release
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.

Read from
Names in the bundleCLAUDE_CODE_FORK_SUBAGENT
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

What has happened since
Flag reading moved The flag server now returns off for tengu_copper_fox, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_copper_fox, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

See this entry in the whole of v2.1.232 →

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