{"agent":"claude","input":"Review the Ecto migrations added by the open pull request for the checked-out branch; ask for the PR URL if it is ambiguous. Read mix.exs, mix.lock, the database configuration and CI first. Prepare a fresh disposable Postgres from the base branch's supported structure/setup, then apply only the proposed migrations and record their SQL. Check table rewrites, lock acquisition, dropped or narrowed data, constraint validation and rollback limitations. Run the relevant tests and mix test when possible. Comment on the existing PR with file and changed-line references, evidence and a safer rollout sequence. Distinguish observed sandbox results from production-size risks. Do not edit migrations, open another PR, connect to production or claim unrun checks passed.","resources":[{"url":"https://github.com/your-org/your-app"}]}