While testing Forge on Linux I noticed a couple of behaviors:

1. Forge automatically creates a ~/forge folder to store its data
2. Inside repos, Forge also creates a ./plans folder automatically

Using these locations is bad etiquette for Linux programs, especially with no confirmation or option to change via config (not that I could find in the docs anyway).

The preferred locations for storing user scoped files are ~/.config and ~/.local.

For per repo files, a single dot folder can cleanly tuck away most files (compare to .git). The main exception there would be files that go under version control, such as AGENTS.md or similar.