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Now that the session model means no HTTP connection is held during the reservation, the dichotomy between "single reserve" and "trapezoid demo" collapses — both are "open N sessions, each held for H seconds, started I seconds apart, close." Replace --reserve/--demo/--duration/--plateau with --count/--hold/--interval. --session-cost becomes --cost. Client is now 64 lines (down from 120). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>