Validate Handoff

Validate the contract between skill phases to catch broken handoffs early. This is the "schema validation at agent boundaries" pattern from distributed systems.

When to Run

Called automatically at phase transitions in create-spec and implement-and-review-loop. Can also be invoked standalone to check spec integrity.

Contracts

Requirements → HLD

Validate that the HLD addresses every requirement:

1. Read all FR-* and NFR-* IDs from the Requirements section.
2. Check the HLD's "Requirements Traceability" section.
3. FAIL if any FR/NFR is not mapped to at least one HLD component.
4. WARN if an HLD component doesn't trace back to any requirement (gold-plating).

HLD → LLD