Page	For
Architecture	How the engine and UI fit together
Extending 012	The patterns new features and scale follow
UX and visual bar	The rules every change follows
Testing	Unit, end-to-end through libghostty, golden screens, the oracle, docs checks, demos
Bounds of support	Measured bounds and known bottlenecks
Observability	Event logs, OTLP export, DuckDB queries, the local telemetry stack
Releasing	The release checklist and `make dist`
The docs site	Building and previewing the Docusaurus site over these docs

Plans are in the roadmap.