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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.248

Sandbox settings schemas built at load time

Under the hood
Useful1 Signal0
Sandbox

Sandbox settings schemas are built at load time with identical rules and text.

What

The schemas validating sandbox network, filesystem, credential and AWS settings moved out of deferred initialisation. All validation text and rules are byte-identical, including the check that each variable fills exactly one AWS pair slot.

Evidence

"${E}" appears in more than one awsPairs slot (within or across pairs) \u2014 each variable can fill exactly one slot.

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.248 →