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.
Command helpers can now redirect child output instead of always buffering it in memory.
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What
The shared command-running helpers now pass through stdout and stderr options when a caller supplies them, so child process output can be redirected instead of always being buffered in memory.
Evidence
preserveOutputOnError
Strings lifted out of the shipped bundle, so the claim above can be checked against them.