# Zacus — Conversation Summary (bundle v3)

This bundle consolidates the key outputs from the conversation:
- Promptable scenario template (user-edited section: prompt_input)
- Canonical scenario YAML (STEP_*/SCENE_* conventions)
- Runtime JSON (DEFAULT.json)
- FSM diagram (Mermaid)
- Codex prompt to update repo targets
- Narrative zacus_v2.yaml aligned with the runtime + real-world gameplay

Key decisions captured:
- Prototype is U-SON.
- Act 1 (~45 min): LA 440 Hz stabilization (STEP_LA_DETECTOR).
- Act 2 (~60 min): Zone 4 piano-alphabet puzzle → play "LEFOU" (letters randomly placed; A anchored on LA 440 Hz).
- QR final payload is "WIN", hidden behind the portrait in the Archives.
- After QR success: Media Hub + persistent boot into media_manager.

Generated: 2026-02-25 (Europe/Paris)