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Generating a migration from a stale branch could silently emit DROP COLUMN for columns the stale branch did not know about, and the script would write that SQL to a new migration file with no warning. Adds two guards to ci_cd/run_migration.py: - Branch freshness check: fetches origin/<base-branch> and exits 3 if HEAD is behind. Default base is litellm_internal_staging. New flags: --base-branch, --skip-freshness-check. - Destructive guard: refuses (exit 2) if the generated diff contains DROP COLUMN / DROP TABLE / DROP INDEX, unless --allow-destructive is passed. Refusal banners include guidance and an explicit callout instructing AI agents not to auto-bypass the flags. Also treats Prisma's "-- This is an empty migration." output as a no-op rather than writing an empty file. Updates litellm-proxy-extras/migration_runbook.md with the new workflow, flag documentation, and agent warnings.