umple-lsp-server

Language Server Protocol implementation for the Umple modeling language.

This package provides the editor-agnostic server used by VS Code, Zed, Neovim, and any generic LSP client that can launch a Node-based language server.

Install

npm install -g umple-lsp-server
umple-lsp-server --stdio

What Ships

• LSP server JavaScript compiled to out/
• umple-lsp-server command wrapper in bin/
• Bundled Tree-sitter Umple WASM parser
• Bundled Tree-sitter query files for definitions, references, completions, and highlighting

umplesync.jar is not bundled in the npm package. Editor clients either download it separately or pass a local path through server initialization options.

Release Notes

Current release: 1.0.1

Highlights:

• Broader completion coverage for associations, requirements, traces, ports, states, and class-scoped symbols.
• Safer go-to-definition, references, rename, workspace symbols, hover, semantic tokens, inlay hints, and code actions across more Umple constructs.
• Formatter safety checks and focused formatting improvements for parser-visible structural syntax.
• Expanded Tree-sitter grammar and query coverage backed by corpus checks.
• Trace transition event symbols: trace transition flip; now resolves, references, hovers, and completes class-scoped transition events.
• Release infrastructure now supports GitHub Actions Trusted Publishing for future npm releases.

See CHANGELOG.md in this package and the upstream repository wiki for the full release history and publishing notes.