engine-transform-rewrite

The rule-interpreting transform engine (ADR-0094).

What it is

The first TransformEngine implementation: it walks a pass's TransformDefs bottom-up over the Ast arena with a remap old→new index table — the proven apply_desugar algorithm generalised to any named pass. Dispatch is a kind → Vec<TransformDef> table built once per pass; there are no kind == checks in the engine core.

Start here

• Reference — public API
• How-to — task recipes
• Explanation — design and rationale

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.