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Sweep 01 Oct 2026 · 17:27Z Build v2.1.287 508 read Stable v2.1.285 Latest v2.1.287 Next v2.1.287 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.286 ·

Some MCP tool calls can move to the background without a timer

An MCP tool call can now be moved to the background even when no auto-background timer is set, if a new check says the call can be moved

You'll notice Improvements
JSON All of v2.1.286
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.286,
ImprovementsSection of the release
What

MCP servers are outside programs that give Claude Code extra tools. A long-running call to one of those tools can be moved to the background so the conversation is not held up. Before, this only happened when a timer for it was set above zero. Now it can also happen with no timer, when a new check says the call can be moved. That check takes into account whether the session is non-interactive and whether the call was made from inside another call.

Why

Some MCP tool calls may now run in the background even if you never set an auto-background timer.

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 the new check looks at to decide that a call can be moved.

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