GPG signing fails in GUI apps (Obsidian, etc.) due to PATH not being inherited

[ulises-c]

Problem

GUI apps on macOS (e.g. Obsidian with the Git plugin) do not inherit the shell PATH, so git cannot find the gpg binary and commit signing fails with:

error: cannot run gpg: No such file or directory
error: gpg failed to sign the data

Fix

Set gpg.program to the absolute path in ~/.gitconfig:

gpg.program = /opt/homebrew/bin/gpg

This should be added to the machine setup script or dotfiles so it is applied automatically on new machines.

Also added

Export GPG_TTY=$(tty) in ~/.zshrc for terminal-based GPG sessions.

[ulises-c]

Going to wrap in PR #19 as a small patch.