pxt-calliope/.vscode/tasks.json

{
	"version": "0.1.0",
	// Task runner is jake
	"command": "pxt",
	// Need to be executed in shell / cmd
	"isShellCommand": true,
	"showOutput": "always",
	"tasks": [
		{
			// TS build command is local.
			"taskName": "serve",
			// Make this the default build command.
			"isBuildCommand": true,
			// Use the redefined Typescript output problem matcher.
			"problemMatcher": [
				"$tsc"
			]
		}
	]
}