handl-lang

kernel ​

The arrow-calculus substrate: language schema, tagged values, extension ABI, floor libs.

What it is ​

The kernel is the platform's smallest layer (ADR-0040): the Language data schema and staged lex/parse/eval dispatch signatures (ADR-0044, language as data), the tagged Value representation the engines share, the dynamic extension ABI (hnl extensions, ADR-0149), and the handl-lib-* floor packages.

What is not kernel: engines, emitters, kits, plugins and hosts. They live in the engine-*, kit-* and host repos and depend on the kernel, never the reverse.

Modules ​

  • crates/handl-language — the Language schema + staged lex/parse/eval dispatch signatures
  • crates/handl-value — the tagged Value representation shared by engines
  • crates/handl-ext — the shared ABI for dynamic hnl extensions (ADR-0149)
  • crates/defining-handl — self-hosting infrastructure (ADR-0044 phase 8)
  • crates/{bytes,cmp,combinators,error,mood,obj,ops,prim,prim-handl,type} — the handl-lib-* substrate packages

Start here ​

No tutorials: this repo is a building block used from Rust. End-to-end walkthroughs live with the product that composes it — see the Handl platform.