This rewrites the app almost entirely, reorganizing its structure and logic, fixing stuff, and using better deps. The app now resides at ./cmd/task.
This is a CLI task management program developed specifically for Project Amber. It supports syncing tasks with it, though it can work completely offline as well.
% go get -u -v git.tdem.in/tdemin/amber_cli/cmd/task
Optionally move the binary you just built to your PATH. This also works for updates.