---
title: Use Hen in VS Code
description: Author `.hen` files with validation, completions, hovers, and inspect-powered tooling.
---
The VS Code extension provides a rich authoring experience for `.hen` files and can launch OpenAPI imports into new collections.
## Install from the Marketplace
[Install Hen from the VS Code Marketplace](https://marketplace.visualstudio.com/items?itemName=BenGoodman.hen)
Open the marketplace listing in your browser, or search for `Hen` in VS Code's Extensions view.
## What you get
- semantic highlighting for core Hen constructs
- hover help for directives, response-path accessors, and typed schema validation with `===` in assertions or guards
- context-aware completions for imports, request references, schema targets, auth or session names, and response roots
- document links and go-to-definition for fragments and named references
- continuous import diagnostics, including missing targets and cycles
- command palette plus explorer or editor-title actions to import OpenAPI JSON and YAML specs through `hen import`
- Hen file icons for `.hen` files