Group calls are a new capability, and 6.6.6 only landed as a patch because the version was bumped once per deploy while the feature was being tested. The number is the release's, not the deploy's. No code changes: version, badge, changelog heading, docs and build stamp. Claude-Session: https://claude.ai/code/session_01XSxAkET3hQTkYDQfbjCQwZ