Language support for BlockML (.bml) in Visual Studio Code and Cursor.
The extension is built entirely on the BlockML language server (@blockml/lsp). There is no XSD / XML schema integration.
Features
.bml language — file type, comments, and bracket matching
Syntax highlighting — position-based roles (framework vs domain vs composition) via semantic tokens, with a TextMate grammar as fallback. Token colors overlay your current theme.
Hover — type and documentation information from the language server
Syntax check — parse and validation errors via the language server (source: blockml)
Navigation — go to definition, peek definition, and find references (including Ctrl/Cmd-click)
Outline — document symbols in the Outline view
Format — format document via the language server
File icons — .bml icon in the explorer and editor tabs (language icon; works with your current file icon theme)
Autocomplete is not implemented yet.
Language server
The extension starts @blockml/lsp as a separate Node process (stdio). It currently provides hover, diagnostics, navigation, outline, and format. Semantic highlighting uses the same @blockml/lsp classifier inside the extension host (not an LSP round-trip). Completion is not available yet.
Requirements:
Open a workspace folder (the server uses workspaceFolders[0]).
Optionally configure the project via bom.config.json (srcDir, libraries).
Disable the server with the setting blockml.bml.enableLanguageServer. Disable semantic highlighting with blockml.bml.enableSemanticHighlighting. Trace LSP traffic with blockml.bml.trace.server.
