@essence-lang/runtime

The Essence language runtime — the native halves of the standard library, inlined into every compiled Program.

This package is consumed in an unusual direction. Programs never import it: the compiler's rewriter writes absolute paths to these modules into the JavaScript it emits, and the bundler inlines and tree-shakes exactly what the Program touched. What the compiler imports from this package is therefore its location — RUNTIME_DIRECTORY and RUNTIME_TSCONFIG — not its values.

That is also why the published package deliberately ships its TypeScript sources in src/ alongside the compiled dist/: the bundler inlines the sources, so a published compiler emits the same bundle bytes a workspace checkout does.

Values are plain objects tagged with a $type symbol; Integer holds a bigint, Rational a pair of them, and the numeric tower continues through Algebraic and Transcendental so that 1::divide(by 3) stays exact. The pretty-printer behind Terminal.inspect lives here too, in Terminal.ts.

You would depend on this package directly only to build tooling that manipulates compiled Essence values — @essence-lang/compiler brings it along for everything else.