doc-validator Purpose Validate relationships and consistency across documents in the SDD corpus: broken cross-references, orphaned artifacts, one-way links, cumulative-tag gaps, duplicate or malformed IDs, and traceability-matrix completeness across the 8 layers. This skill is the validator — the framework ships no runtime code; it applies declarative checks against and the layer files. Layer : cross-cutting utility (reads all 8 layers; produces no artifacts). When to Use Use for project-wide checks: relationships between documents, cumulative tagging, orphan detection, bidirectional-link con…