Cucumber/Gherkin support

Cucumber/Gherkin support for Zed

Zed extension adding Cucumber/Gherkin syntax highlighting and LSP support.

Prerequisites

Install the language server globally with npm:

npm install -g @cucumber/language-server

Note: npm is required (not bun/yarn/pnpm). The language server resolves tree-sitter WASM files via nested node_modules paths that only npm's global install layout provides.

Features

• Gherkin Tree-Sitter Grammar (via alistairstead/tree-sitter-gherkin, fork of binhtddev/tree-sitter-gherkin)

  • Syntax highlighting with semantic step coloring (Given/When/Then)
  • Injections (docstring language detection)
  • Outline navigation
  • Full Gherkin spec: Feature, Scenario, Scenario Outline, Background, Examples, Rules, tags, data tables, docstrings
  • i18n keyword support

• LSP (via @cucumber/language-server)

  • Autocompletion for step definitions
  • Go-to-definition for steps
  • Configuration via .zed/settings.json:

    {
      "lsp": {
        "cucumber": {
          "settings": {
            "features": ["features/**/*.feature"],
            "glue": ["steps/**/*.ts"]
          }
        }
      }
    }