Coalesce equal parsed file definitions and reject conflicting same-name definitions before registry import resolution. Preserve field presence, known and opaque facts through one budgeted SDK parse while retaining original descriptor bytes and digest.
Keep unique files in their original order, reuse the existing admission traversal, and cover public CLI/MCP import, ordering, presence and source-provenance controls. Document REA ambiguity policy separately from protoc precedence.
morluto