Concepts

The pages in this section explain the building blocks of a ScaiCore program and the model of execution the runtime gives you. Read them once when you're new to the language; they pay off when you start choosing between, say, a @rigid and a @flexible block, or when you need to decide whether your Core is stateless or per-entity.

In this section#

• Blocks — the fourteen block kinds, organized by what they're for: computation, control flow, external calls, and lifecycle. The most important conceptual page in the docs.
• Instance modes — :stateless, :entity, and :singleton. Picks the right one for your workload.

For the exhaustive grammar and IR shape, jump to the reference: Language reference for the full language dictionary, IR specification for what the compiler emits and the runtime consumes. The reference pages are published snapshots of the upstream design docs; they're authoritative for syntax and semantics when this section doesn't go deep enough.