Technical article
Exact-SHA Verification vs. Textual Code Review
A review is only reproducible when it identifies the immutable commit that produced the evidence. Nexus binds reviewer assignment, findings, tests and integration eligibility to one exact SHA; a newer branch head is a different review target. This prevents an approved summary from being reused after code changes.
- Evidence names the exact commit SHA
- Reviewer reads that immutable state
- Any code change invalidates the prior approval
- Integration checks the same reviewed SHA
