mix req_llm.migration_audit (ReqLLM v1.19.0)

Scans Elixir source for precise ReqLLM V2 migration patterns without evaluating or rewriting application code.

mix req_llm.migration_audit
mix req_llm.migration_audit lib test
mix req_llm.migration_audit --exclude test/fixtures --format json

Actionable findings exit with status 1, audit errors with status 2, and clean or advisory-only reports with status 0.