The vscode extension includes syntax highlighting, a lobster LSP (Language Server Protocol).
See here for more info about the lobster LSP.
Get the file lobster.vsix found in the repo at
docs/vscode/lobster.vsix.
Open your vscode command palette and search for
Install from VSIX. Then select the file mentioned
above.
Copy docs/vscode/tasks.json to a
.vscode workspace folder that is in the root of where you
keep your lobster code.
Load some lobster code. pressing ctrl+shift+b should
run it. If there was an error, press F8 to go to it, and/or
ctrl+` (shell) to show program output.