vscode-fish

Browser: Download from the <a href="https://marketplace.visualstudio.com/items?itemName=zgm.vscode-fish" target=_blank rel="noreferrer noopener nofollow">VS Code Marketplace
Command line: code --install-extension zgm.vscode-fish
VS Code command palette: ext install zgm.vscode-fish

Syntax highlighting, snippets, formatting, and linting for fish files.