/explore v2 — grand-tour narration: a guided cinematic flight across the nested scale-shells

[chipi]

Deferred from the /explore v2 "Known Universe" roadmap (RFC-032 §S8+ / PRD-030 Phase E). The second of the two S8+ ideas split out of the roadmap for separate tracking (sibling: #410 message-object trajectories). Lineage: descendant of #258 / #86.

Idea

A narrated, auto-piloted flight across the whole nested stack — solar system → stellar neighborhood → Milky Way → (eventually) Local Group — the "throne of glory" cinematic pass over everything the epic built. Press play, sit back, and get walked outward through the scales with narration and synced highlights.

Scope sketch

• Scripted camera path that drives the existing context crossings (reuses the wheel/pinch crossing machinery + per-context cameras + breadcrumb).
• Per-stage narration (SSML → audio) with synced cue/label reveals — reuse the tour-stage authoring pattern (pair each imperative with a cue + click) and the Sensory Layer audio (v0.7 — Sensory Layer: gyroscope, sonification, haptics (PRD-017 / RFC-020) #147).
• Reduced-motion path + skip / pause / chapter controls; honest "schematic, not to scale" badging carries through (MW/Local Group).
• i18n narration across the 14 locales (audio + captions).

Non-goals

• Not a video export / render-to-file feature.
• Not a replacement for free exploration — it's an optional guided layer on top.

Cadence

Recon → mock-gate (the cinematic bar is high — YouTube-grade, per the /fly vision) → build → i18n at end → preflight.