The amd64 leg runs on its own fresh titan-24 pod but never checked out the SCM, so its independent reviewed-revision boundary check hit 'git rev-parse origin/main -> fatal: not a git repository' and the build failed with exit 128 (the arm64 leg built and pushed fine). Add checkout scm to the amd64 stage. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BvMSXH8VH2tMWXanb8SJdf