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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.268 ·

New gated sandbox-boundary system-prompt text (tengu_elegant_ocean)

New system-prompt text explains the sandbox's boundaries to the model, gated behind an unread flag

TierNothing to try yethow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaSandboxwhat it touches
KindIn Developmentin v2.1.268,
Nothing to try yet

New system-prompt text explains the sandbox's boundaries to the model, gated behind an unread flag

What

A new block of instructional text can be added to the system prompt that explains, in detail, what the sandbox (the restricted environment a session runs in) does and does not give access to: which directories, which network destinations, and which credentials are available. It tells the model to report when something it needs is missing rather than try to work around the sandbox's limits.

Why

This is controlled by a gate called tengu_elegant_ocean, and nothing is yet known about whether or how it is being turned on for any account, so it isn't possible to say whether or when this text is currently shown.

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 doubtWhether this gate is enabled for any accounts is unread; it isn't known when or for whom this sandbox explanation appears.

See this entry in the whole of v2.1.268 →

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