# dynamodb-toolbox-patterns

A skill with TypeScript patterns for DynamoDB-Toolbox v2: schemas, entities, .build() commands, queries and transactions.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 3500 installs · ★ 363
- Author: giuseppe-trisciuoglio
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/giuseppe-trisciuoglio/developer-kit/tree/HEAD/plugins/developer-kit-typescript/skills/dynamodb-toolbox-patterns/SKILL.md
- Updated: 2026-09-10
- HTML: https://affpapa.org/en/nevibecode/skills/dynamodb-toolbox-patterns

## What it does

The skill gives your agent working patterns for a DynamoDB access layer built on DynamoDB-Toolbox v2 and the AWS SDK v3 DocumentClient. It covers table and GSI declarations, entities defined with `item()`, `string()`, `number()`, `list()` and `map()`, and the modifiers `.key()`, `.required()`, `.default()`, `.transform()`, `.link()`.

A second block is about commands. `PutItemCommand`, `GetItemCommand`, `UpdateItemCommand` and `DeleteItemCommand` are assembled through `.build()` instead of hand-rolled input objects. There are examples of `QueryCommand` and `ScanCommand` with a `beginsWith` range and an index query, plus `BatchWriteCommand` and `TransactWriteCommand` for bulk and atomic writes.

You need `dynamodb-toolbox`, `@aws-sdk/client-dynamodb` and `@aws-sdk/lib-dynamodb` installed. Everything here assumes AWS SDK v3, so examples will not compile against a v2 client. Transactions are slower than single-item writes and come with limits, which is worth checking before you wrap every write in one.

## Requirements
- Works with: AWS

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add giuseppe-trisciuoglio/developer-kit --skill dynamodb-toolbox-patterns -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/dynamodb-toolbox-patterns/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/dynamodb-toolbox-patterns/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add giuseppe-trisciuoglio/developer-kit --skill dynamodb-toolbox-patterns -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/dynamodb-toolbox-patterns/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add giuseppe-trisciuoglio/developer-kit --skill dynamodb-toolbox-patterns -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/dynamodb-toolbox-patterns/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install giuseppe-trisciuoglio/developer-kit dynamodb-toolbox-patterns
```

2. **Manually: put the files in place**
- File: `.github/skills/dynamodb-toolbox-patterns/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add giuseppe-trisciuoglio/developer-kit --skill dynamodb-toolbox-patterns -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/giuseppe-trisciuoglio/developer-kit --path plugins/developer-kit-typescript/skills/dynamodb-toolbox-patterns
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/dynamodb-toolbox-patterns/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add giuseppe-trisciuoglio/developer-kit --skill dynamodb-toolbox-patterns -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/giuseppe-trisciuoglio/developer-kit/tree/HEAD/plugins/developer-kit-typescript/skills/dynamodb-toolbox-patterns/SKILL.md

## When to use it
- declare a table and entities with strict TypeScript inference
- run CRUD through `.build()` instead of manual command input
- query a key or GSI with a `beginsWith` range
- combine several entities into a batch or transaction write
- lay out a single-table design with computed keys

## Example prompts
- Help me define a User entity for DynamoDB-Toolbox v2 with PK/SK keys and a GSI
- Rewrite my DynamoDB reads as `.build(QueryCommand)` with a `beginsWith` range
- Build a transaction from PutItem and UpdateItem using `TransactWriteCommand`

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: b5df3cdc0504111a.

BEGIN THIRD-PARTY FILE b5df3cdc0504111a
````text
---
name: dynamodb-toolbox-patterns
description: Provides TypeScript patterns for DynamoDB-Toolbox v2 including schema/table/entity modeling, .build() command workflow, query/scan access patterns, batch and transaction operations, and single-table design with computed keys. Use when implementing type-safe DynamoDB access layers with DynamoDB-Toolbox v2 in TypeScript services or serverless applications.
allowed-tools: Read, Write, Edit, Glob, Grep, Bash
---

# 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 dynamodb-toolbox @aws-sdk/client-dynamodb @aws-sdk/lib-dynamodb
```

```typescript
import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
import { DynamoDBDocumentClient } from '@aws-sdk/lib-dynamodb';
import { Table } from 'dynamodb-toolbox/table';
````
END THIRD-PARTY FILE b5df3cdc0504111a

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First 2209 of 7152 bytes. © giuseppe-trisciuoglio · MIT · https://github.com/giuseppe-trisciuoglio/developer-kit/tree/HEAD/plugins/developer-kit-typescript/skills/dynamodb-toolbox-patterns/SKILL.md

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