{"id":79563,"plugin_id":"plugins_6ab40fcbcc3c81919e0c679fee35faaf","kind":"skill","collection_source":"plugin_package","comparison_source":null,"observed_at":"2026-11-04T00:11:25.773Z","digest":"89758dbe6956ec7089b1b3f5c401dd43512bbeb827efe4bb2a023832ae198b0c","against":null,"payload":{"description":"Plan and review schema/DDL changes without breaking live readers or losing data.","included_files":[],"name":"schema-migration-review","skill_md_contents":"---\nname: schema-migration-review\ndescription: Plan and review schema/DDL changes without breaking live readers or losing data.\n---\n\n# Schema Migration Review\n\n**Trigger:** Plan and review schema/DDL changes without breaking live readers or losing data.\n\n## Workflow\n1. Inventory producers, consumers, schema contracts, compatibility requirements and the target deployment environment.\n2. Prefer phased expand–migrate–contract changes for breaking modifications, with dual-write/dual-read where justified.\n3. Examine transaction semantics, table rewrite or locks, nullability/defaults, indexes, permissions and data backfill cost by platform.\n4. Define pre-change backups or forward-fix/rollback mechanisms and smoke checks before release.\n5. Separate proposed DDL from approved production execution and list consumer validation checkpoints.\n\n## Critical standard\nNever promise DDL is transactional on every platform, or claim a plan is zero-downtime without evidence.\n\n## Evidence and execution\nOnly say \"executed\", \"passed\", \"observed\", \"optimized\" or \"deployed\" when a connected tool returned evidence for that claim. An SQL draft, a textual review, or local fixture proof alone is not production validation. Never ask the user to paste passwords or raw confidential records.\n\n## Supporting references\n- Read `../../references/safe-write-checklist.md` when relevant.\n- Read `../../references/migrations-and-transactions.md` when relevant.\n- Read `../../references/dialects.md` when relevant.\n\n## Return\nMigration steps, impact/risk table, verification and recovery plan.\n"},"changes":[],"summary":"First saved snapshot. No earlier version is available for comparison.","summary_kind":"deterministic","summary_metadata":{}}