The RtcSession module doc cited the dropped rutster-signaling-sip crate and a 'future SIP SDP path' that ADR-0007 superseded. Re-anchor on ADR-0007: no first-party SIP/SDP — the trunk is rented (CPaaS media-leg) or out-of-tree SBC, so rutster's SDP is WebRTC-only via str0m. Final straggler of the rutster-signaling-sip → rutster-trunk rename. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01KhhqKG4cra7d1PBoVbj9UJ