How to install from a VSIX - PeterWone/vscode-arduino-cli GitHub Wiki

  1. Create a VSIX
  2. Switch to the extension pane and click the ellipsis (three dots) to drop the menu.

menu

  1. Choose the bottom item Install from VSIX... which opens a file dialog.
  2. Find your VSIX, select it and click the Install button.

file dialog

IMPORTANT

If you change the code you must bump the version in package.json before packaging a new VSIX otherwise VS Code will install from its cache and won't pick up your changes.