Pages that boost forms no longer flood the console with DOMException: HTMLElement object could not be cloned. A form control named id, class, or attributes shadows the matching property on the form element, so element details are now read through Element.prototype rather than off the element itself. This is the crash reported in issue #8.
SVG elements no longer break event capture. Their className is an SVGAnimatedString instead of a string, and the class is now read from the attribute.
An event that still fails to serialize is dropped with one console warning instead of being retried, counted toward the circuit breaker, and logged again on every occurrence.
Element details are no longer reported as [Circular] when the same element appears twice in one event, which htmx does routinely with detail.elt and detail.target.

The content script no longer logs its startup and per-message progress to the console of every page it runs on. Warnings and errors are unchanged, and the "not connected to the background script" warning now appears once per disconnect rather than once per event.
The htmx peer dependency range accepts the 4.0.0-beta6 prerelease.

Dropped the htmx.process wrapper and its synthetic htmx:process entry. Content scripts run in an isolated world and never see the page's window.htmx, so the wrapper never ran. htmx's own process events already report the same work, so the event log is unchanged.