engine-fmt

A data-driven AST formatter: renders an Ast back to surface syntax from grammar rows, tokens and ast shapes — no hardcoded kind strings.

What it is

A tool in the engine-* family. Formatting is projection, not semantics: every kind-to-syntax mapping already exists in the language data, so the formatter only chooses a rendering strategy (infix / prefix / delimited) plus a layout.

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.