- Add pre-parse merge conflict marker detection before JSON parsing - Show clear error message when conflicts are detected - Provide resolution instructions (Git client or bd export) - Add TestAutoImportMergeConflict test case - Prevents silent auto-import failures from cryptic parse errors Amp-Thread-ID: https://ampcode.com/threads/T-d83011c0-7dfc-49c9-96c1-05c94ec2a3d3 Co-authored-by: Amp <amp@ampcode.com>