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aws-blocks

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Guides building full-stack applications with AWS Blocks — an Infrastructure-from-Code framework. Applies when creating APIs, selecting Building Blocks (KVStore, DistributedTable, Database, AuthBasic, AuthCognito, Realtime, AsyncJob, FileBucket, etc.), running local development, or deploying AWS Blocks applications. Also covers AWS Blocks topics with validated, version-specific patterns that prevent common mistakes. Triggers when user mentions AWS Blocks; project has aws-blocks/ directory; code imports @aws-blocks packages.

plugins/aws-core/skills/aws-blocks/SKILL.md

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Nov 11, 2026
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Apache-2.0

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# AWS Blocks Application Development

> **Package naming:** All packages are published under the `@aws-blocks` scope (e.g., `@aws-blocks/core`, `@aws-blocks/blocks`, `@aws-blocks/bb-kv-store`).

## Overview

AWS Blocks is an Infrastructure-from-Code framework where Building Blocks bundle CDK, SDK, and local mocks into a single API. It provides 18+ Building Blocks covering storage, authentication, real-time communication, background jobs, file management, AI/search, email, and observability — all working locally without AWS credentials.

**Key characteristics:**

- One `aws-blocks/` directory defines the entire backend
- Frontend imports are fully typed — no client generation needed
- All Building Blocks work locally without AWS (mocks persist to `.bb-data/`)
- Deploy ephemeral, individual testing environments with `npm run sandbox` and long-lived environments with `npm run deploy` using least-privilege credentials
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