chore: import upstream snapshot with attribution

cli-tool/components/commands/setup/create-database-migrations.md

@@ -0,0 +1,34 @@
+---
+allowed-tools: Read, Write, Edit, Bash
+argument-hint: [migration-name] | --create-table | --add-column | --alter-table
+description: Create and manage database migrations with proper versioning and rollback support
+---
+
+# Create Database Migrations
+
+Create and manage database migrations: **$ARGUMENTS**
+
+## Current Database State
+
+- ORM detection: @package.json or @requirements.txt (detect Sequelize, Prisma, Alembic, etc.)
+- Migration files: !`find . -name "*migration*" -type f | head -5`
+- Database config: @config/database.* or @prisma/schema.prisma
+- Current schema: !`ls migrations/ 2>/dev/null | wc -l` migrations found
+
+## Task
+
+Create comprehensive database migrations with proper versioning and rollback capabilities:
+
+**Migration Types**: Use $ARGUMENTS to specify table creation, column addition, table alteration, or data migration
+
+**Migration Framework**:
+1. **Migration Planning** - Analyze schema changes, dependencies, and data impact
+2. **Migration Generation** - Create timestamped migration files with up/down methods
+3. **Schema Updates** - Table creation, column modifications, index management
+4. **Data Migrations** - Safe data transformations and backfills
+5. **Rollback Strategy** - Implement reliable rollback procedures for each change
+6. **Testing** - Validate migrations in development and staging environments
+
+**Best Practices**: Follow database-specific conventions, maintain referential integrity, handle large datasets efficiently, and ensure zero-downtime deployments.
+
+**Output**: Production-ready migration files with comprehensive rollback support, proper indexing, and data safety measures.