product-session

Launch, resume, and drive a phase-gated What→How→Build workshop session over the Product framework graph, and route to the right phase skill. Use when the user says "start a product session", "run a workshop session", "product session start", "product mcp --workflow", "resume the session", "advance the phase", or "finalize the session". Owns start / status / advance / finalize and the locked-session guardrails;…