v1.30.2 — mandatory session-start roster & model confirmation

§9.0 now mandates a session-start roster + per-agent model confirmation: at a session's first readiness check the facilitator confirms the active roster and each agent's selected model with the user before the first idea; the user's persistent per-agent model choice is recorded in meta/headless-agents.local.json and reused until changed (later sessions show the saved picks for explicit confirmation). Protocol stays model-agnostic. Detailed interactive flow in parley-deck-skill SKILL.md.