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.
The Write tool now validates file modes before writing, preventing attempts to write to directories. Returns an appropriate error when the target path is a directory.
Evidence
Directory mode check (search for "& 128" bit flag validation)
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
