gstack-brain-init used `gh repo create --source $GSTACK_HOME` before
running `git init` on that directory. gh requires --source to point at
an existing git repo, so the call fails with "not a git repository"
on first run. The fallback path (gh repo view) could only recover if
the repo was somehow pre-created — which it wasn't.
Fix: omit --source from `gh repo create`. The script's later steps
(git init, remote add, push) wire up the remote explicitly.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Garry Tan
04185d8f92