Unclear Whether the tengu_auto_mode_context_static_over_budget gate affects this behavior is unread for this site's account, so nothing can be said about it.
Claude Code's server-side auto-mode permission classifier builds a context payload that can include git state, prior-turn context, Chrome tabs, and now also artifacts. When that payload is too large, the classifier already had a system to shed less-important fields one at a time; it can now also shed artifacts before finally warning and giving up, at which point every one of these variable parts is left out of the request entirely.
Adding artifacts as a shed-able field means a request that would otherwise fail for being oversized can still go through, with artifact state trimmed out first rather than the whole classifier context being dropped immediately.
Whether the `tengu_auto_mode_context_static_over_budget` gate affects this behavior is unread for this site's account, so nothing can be…