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.
A checkout hook that succeeds but produces nothing now reports a structured reason and exit code.
What's wrong with this entry?
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What
When a checkout hook exits successfully but leaves nothing usable behind, the failure is now a typed error with an exit code and a short reason, so it can be classified rather than only printed.
Details
Reasons: exited 0 but did not create the checkout directory and exited 0 but the checkout path is not a directory.
Evidence
exited 0 but the checkout path is not a directory
Strings lifted out of the shipped bundle, so the claim above can be checked against them.