MergeWhy captures tamper-proof evidence for every code change. When auditors ask "why was this changed?" — the answer is already packaged. Automatically extracts evidence from PRs, reviews, tickets, CI/CD, and Slack threads, scores evidence quality (0-100), evaluates against 25 compliance frameworks (SOC 2, SOX, CMMC, FedRAMP, HIPAA, GDPR, ISO 27001, and more), and seals it in a SHA-256 cryptographic vault. Zero developer workflow changes required.