Expression reference

An exhaustive, generated reference for every @expr/* — its inputs and output type — is coming soon.

In the meantime:

• The Expressions guides cover them with examples — queries, state & context, transforms, combinators & templates, and composition.
• Your editor autocompletes and validates expressions from the JSON Schema Noemata generates under .data/schemas/.
• The installed frame packs under @frames/@opentelemetry/ show expressions wiring real dashboards.