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Sweep 23 Oct 2026 · 21:48Z Build v2.1.310 529 read Stable v2.1.308 Latest v2.1.310 Next v2.1.310 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.310 ·

The bundled test server can be started with a pane option

The test MCP server bundled with Claude Code can now be started with --pane, alongside the existing --preview

Under the hood Internal Changes
JSON All of v2.1.310
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Claude TestArea: what it touches
Internal ChangesKind: in v2.1.310,
Internal ChangesSection of the release

Unclear Nothing shows what makes Claude Code start the server with --pane.

What

Claude Code ships with a bundled MCP server for testing. MCP servers are programs that give Claude extra tools. When Claude Code sets this server up, it can now add --pane to the options it starts the server with. Previously only --preview could be added.

Why

This points to a new pane mode for the bundled test feature.

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 doubtNothing shows what makes Claude Code start the server with `--pane`.

See this entry in the whole of v2.1.310 →

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