{
  "early_retention_contract": "Main exclusively owns .spt/preserved/302/artifacts-release-build-3142753a/ for immediate post-build EXE/PDB retention and manifest. This path is distinct from finalizer-owned artifacts-release-3142753a/.",
  "available_build_metadata": "todlando-release/build/receipt.json contains compiler_artifacts and built_subjects with release CLI and fixture EXE/PDB hashes.",
  "canonical_handoff": "Unchanged finalizer requires full proof sequence and verifies canonical retained pairs against build and exercised-subject hashes. No script delay or additional source changes."
}