A scene-and-composition runtime for cinematic, timeline-driven browser presentations.
Scenes are reusable modules with their own timelines, assets, captions, and metadata. Compositions are manifests that arrange scenes into full talks, short cuts, trailers, standalone demos, or other recompositions of the same library.
The runtime owns the scene/composition model. External libraries are adopted where they make a specific layer stronger, not where they force the project back into slide semantics.
See docs/adrs/ for architectural decisions. The trust model for
scene modules — what the runtime treats as trusted application code,
and what current validation does not cover — is documented in
docs/scene-trust-model.md.