Empty-repo HTTPS push with git clone exits 0 but silently fails (remote
branch creation on an empty clone is unreliable). Fix:
- Create repo with auto_init=True + default_branch=main (initial commit present)
- Clone into a non-existing subdir (git clone must target non-existing path)
- Push via explicit cred_url (bypasses remote config; no tracking needed)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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