Can I add a global task with vscode tasks.json format?

[ofseed]

nvim-dap makes it possible to add a global launch.json in neovim config instead of project-level .vscode/launch.json, overseer supports .vscode/tasks.json, and it supports preLaunchTask, so I want to have a global tasks.json to make it work with the global launch.json, instead define a global launch.json and write a similar taksks.json for every project to use preLaunchTask.