FHIR Shorthand

FHIR Shorthand for Zed

A Zed extension that adds language support for FHIR Shorthand (FSH) — the domain-specific language for authoring HL7® FHIR® profiles, extensions, value sets, and other Implementation Guide artifacts.

Features

Syntax highlighting for .fsh files
Code outline (Profiles, Extensions, Instances, ValueSets, CodeSystems, …)

It is a grammar-only extension: highlighting and outline come from a purpose-built Tree-sitter grammar — a port of SUSHI's official ANTLR grammar for FSH 3.0.0. There is no language server yet, so live diagnostics and completion are not provided — run SUSHI (fsh-sushi) for compilation and error checking.

Install (development)

Open Zed.
Run zed: install dev extension from the command palette and select this directory.
Open a .fsh file (e.g. examples/patient.fsh).

Zed downloads and compiles the Tree-sitter grammar on install. Edits to the .scm query files are picked up after zed: reload extensions.