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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 v2.1.302 ·

Claude Code keeps a separate set of environment values for tool servers

Claude Code now holds a separate, initially empty set of environment values for launching tool servers

Under the hood Internal Changes
JSON All of v2.1.302
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.302,
Internal ChangesSection of the release

Unclear What values go into the tool server environment, and when it is used, is not shown.

What

Claude Code now keeps a separate set of environment values for launching tool servers, the outside programs that supply extra tools. It starts empty and sits beside the set Claude Code already passes to programs it starts from your settings.

Why

Tool servers may get their own launch environment, kept apart from the one other started programs receive.

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 doubtWhat values go into the tool server environment, and when it is used, is not shown.

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