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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

Claude Code v2.1.309 ·

Resumed agents started from a stream count as the built-in type

When an agent started from a stream is resumed, Claude Code now treats it as the built-in agent type

Under the hood Internal Changes
JSON All of v2.1.309
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.309,
Internal ChangesSection of the release

Unclear It is not clear what being treated as the built-in type changes for a resumed agent.

What

An agent is a helper Claude can start to work on part of a task. When an agent is resumed, Claude Code decides whether it is the built-in type. Agents that were launched from a stream now also count as built-in.

Why

This is a small change to how resumed agents are handled.

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 what being treated as the built-in type changes for a resumed agent.

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