mermaid-opm for VS Code

VS Code support for OPL (Object-Process Language, ISO 19450), backed by the mermaid-opm-lsp language server.

Features

• Syntax highlighting for .opl files.
• Diagnostics — parse and model problems reported inline as you type.
• Completion — reserved words plus the objects, processes, and states declared in the file.
• Hover — kind, essence, affiliation, and states of a thing under the cursor.
• Outline — objects/processes and their states in the Outline view.

Commands

• OPM: Open Preview — render the active .opl file as an OPD in a side panel.
• OPM: Export SVG — render the active .opl file to an .svg file.

Requirements

• VS Code 1.94 or newer.

Settings

• opm.diagnostics.enable (boolean, default true) — turn inline diagnostics on or off.

Notes

• Go-to-definition, rename, and formatting are not included yet.
• The language server is bundled with the extension; no separate install is needed.

More

• OPL syntax and supported subset: see the project documentation (docs/usage/opl-syntax.md).
• Project: mermaid-opm (Mermaid external diagram plugin + CLI + LSP).