Superseded: This root architecture snapshot was frozen before Echo's “There Is No Graph” rewrite. The stable path remains as a signpost; it is not current architectural authority.
Start with the documentation map, then use the document that owns the boundary you are changing:
- There Is No Graph — substrate and observer-reading ontology;
- Continuum Transport — witnessed causal-history exchange;
- Application Contract Hosting — application/runtime ownership;
- Runtime Authority, Runtime Constellation, and WARP Optics — living cross-module doctrine;
- specifications, invariants, and ADRs — executable contracts and durable decisions.
The current north star is:
There is witnessed causal history.
WARP optics chart it.
Holograms witness those charts.
Materialized graphs are optional readings.
Continuum is the protocol for lawful causal-history exchange.
The former graph-engine, Scene/TTD-port, and snapshot-pipeline description is preserved in Git history rather than mixed into current doctrine.