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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.219 ·

Turn state extracted into a reusable factory

The per-turn bookkeeping in the query loop was restructured with no change you can see.

Under the hood Internal Changes
JSON All of v2.1.219
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.219,
Internal ChangesSection of the release
What

The per-turn accumulator used by the query loop is now built by a factory rather than assembled inline. No user-visible behaviour changes.

Details
  • the accumulator holds assistant messages, tool results, tool_use blocks, and the follow-up, end-turn, prevent-continuation and deferred flags
  • reset can optionally keep assistant messages
  • rebuildStreamingToolExecutor re-creates the streaming tool executor from the injected constructor
Evidence

rebuildStreamingToolExecutor

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

How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeAdded nested subagent forwarding in stream-json: subagents spawned at depth-2+ now appear when --forward-subagent-text is set, keyed by…

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