Mirrors HeadlessFixture.NewNetworkEmitBattle wiring (opponent seating, leader life, card templates, deck seeding) minus the emit-only RealTimeNetworkAgent scaffolding (shadow only receives). Probe passed first run — M13 already filled the network-mgr construction gaps. No Engine/ edits; drift clean. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>