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 --cowork flag and cowork plugins directory are hidden internal features, likely intended for Anthropic development and testing workflows. They are not documented in public help output and should be considered unsupported for general users.