ADR 07: Built-in Zig types are keywords

Date: 2026-06-16

Context

The boundary vocabulary needs a representation for built-in Zig scalar types.

Decision

Represent built-in Zig types as keywords using exact Zig spelling, such as :i64, :f64, and :void.

Consequences

Keywords are idiomatic Clojure data and avoid symbol-resolution ambiguity; exact Zig names avoid confusion with JVM and Clojure names like long, double, or nil.

Alternatives

Resolved symbols or JVM type names were considered; symbols invite resolution ambiguity, and JVM names misdescribe the native types.