dynamodb-toolbox-patterns

# DynamoDB-Toolbox v2 Patterns (TypeScript) ## Overview This skill provides practical TypeScript patterns for using DynamoDB-Toolbox v2 with AWS SDK v3 DocumentClient. It focuses on type-safe schema modeling, `.build()` command usage, and production-ready single-table design. ## When to Use - Defining DynamoDB tables and entities with strict TypeScript inference - Modeling schemas with `item`, `string`, `number`, `list`, `set`, `map`, and `record` - Implementing `GetItem`, `PutItem`, `UpdateItem`, `DeleteItem` via `.build()` - Building query and scan access paths with primary keys and GSIs - Handling batch and transactional operations - Designing single-table systems with computed keys and entity patterns ## Instructions 1. **Start from access patterns**: identify read/write queries first, then design keys. 2. **Create table + entity boundaries**: one table, multiple entities if using single-table design. 3. **Define schemas with constraints**: apply `.key()`, `.required()`, `.default()`, `.transform()`, `.link()`. 4. **Use `.build()` commands everywhere**: avoid ad-hoc command construction for consistency and type safety. 5. **Add query/index coverage**: validate GSI/LSI paths for each required access pattern. 6. **Use batch/transactions intentionally**: batch for throughput, transactions for atomicity. 7. **Keep items evolvable**: use optional fields, defaults, and derived attributes for schema evolution. ## Examples ### Install and Setup ```bash npm install dynamo...