In case anyone else has this issue, vscode will use the .vscode/tasks.json file at the root of the folder you open, so if you open the DaisyExamples folder, it will use the DaisyExamples/.vscode/tasks.json file, which does not contain an entry for “build_all”. Open the specific folder you want, for example, DaisyExamples/seed/Blink, and you will see the tasks.