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 proactive.autoEnable setting (which controlled whether autonomous background operation was auto-activated at launch) has been removed. The /proactive alias for /loop replaces the previous configuration approach.
Evidence
Setting removed (search for "autoEnable" near proactive in old file only)
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.