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Sweep 02 Oct 2026 · 18:55Z Build v2.1.288 509 read Stable v2.1.285 Latest v2.1.287 Next v2.1.288 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.287 ·

Environment details can now leave out the shell and OS version

A record describing the environment now accepts entries without the shell and OS version fields

Under the hood Internal Changes
JSON All of v2.1.287
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
InternalsArea: what it touches
Internal ChangesKind: in v2.1.287,
Internal ChangesSection of the release
What

A record that describes the environment Claude Code is running in now treats shell and osVersion as optional. Previously shell was required.

Why

Data that leaves out these details is now accepted instead of being rejected as invalid.

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 this environment record is used for is not known.

See this entry in the whole of v2.1.287 →

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