{"version":"1.0","workflow_uuid":"84ab1d5e-6fa5-42ed-bc57-443b0d997577","workflow_title":"Zero-Downtime DB Migration — Expand Contract Checklist","install_contract":{"version":"1.0","installReady":false,"title":"Zero-Downtime DB Migration — Expand Contract Checklist","summary":"Expand-contract database migration checklist for agents. Covers additive schema changes, batched backfills, rollback, and contract gates.","assetType":"Knowledge","pageUrl":"https://tokrepo.com/en/workflows/zero-downtime-db-migration-expand-contract-checklist-84ab1d5e","sourceUrl":"https://martinfowler.com/bliki/ParallelChange.html","intendedFor":[],"firstActions":[],"agentFirstSteps":[],"targetPaths":[],"verification":[],"startingPoints":[],"example":"","successOutcome":"","boundaries":[],"askUserIf":["the current workspace stack cannot be matched to a safe upstream template","the target path is not the project root, or an existing file should be merged instead of overwritten"]}}