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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

Claude Code v2.1.300 ·

Forked helper agents get their model passed in a different way

Forked helper agents now receive the main session's model as a separate settings layer, and the effort setting is dropped unless a condition holds

Under the hood Internal Changes
JSON All of v2.1.300
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
SubagentsArea: what it touches
Internal ChangesKind: in v2.1.300,
Internal ChangesSection of the release

Unclear It is not clear whether forked helpers now actually run on a different model or effort level than before.

What

A subagent is a helper that Claude Code starts to work on part of a task. A forked subagent starts from a copy of the current session. Three things change in how one is set up:

  • The main session's model now reaches the helper as its own separate layer of settings. Before, it was set on the helper directly.
  • The effort setting, which controls how much reasoning the model does, is now left out unless a particular condition holds.
  • The chosen model is cleaned up into a standard form before it is used.
Why

This may change which model and which effort level a forked helper ends up using.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear whether forked helpers now actually run on a different model or effort level than before.

See this entry in the whole of v2.1.300 →

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