# Agents Build

Use to extend an existing agent project with memory, app integration, VPC, multi-agent...

- Repository: https://github.com/aws/agent-toolkit-for-aws (3366 stars)
- Category: Testing
- License: Apache-2.0
- Last updated: 2026-10-30
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add aws/agent-toolkit-for-aws --skill agents-build -g -a claude-code -y`
Codex: `npx skills add aws/agent-toolkit-for-aws --skill agents-build -g -a codex -y`
Cursor: `npx skills add aws/agent-toolkit-for-aws --skill agents-build -g -a cursor -y`
Gemini CLI: `npx skills add aws/agent-toolkit-for-aws --skill agents-build -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add aws/agent-toolkit-for-aws`

## Description

Use to extend an existing agent project with memory, app integration, VPC, multi-agent, migration, model, browser, code interpreter, payments, or resource removal. Triggers: "add memory", "remember across sessions", "call agent from app", "invoke agent from code", "agent auth", "streaming", "VPC", "VPC connectivity", "can't reach from VPC", "multi-agent", "A2A", "A2A auth", "orchestrator not delegating", "specialist not called", "migrate Bedrock Agent", "migration issue", "change model", "browser tool", "code interpreter", "delete agent", "tear down", "agentcore remove", "cross-account memory", "add payments capability to my agent", "wire payments plugin", "integrate x402 payments with the agent I'm building", "add MPP payments", "Machine Payments Protocol". External APIs via Gateway: use agents-connect. New project: use agents-get-started. CLI/dev-server errors: use agents-debug. Runtime x402/MPP payments: use agents-pay. Migration-specific Strands vs LangGraph routes here.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# build

Add capabilities to your AgentCore agent project.

## When to use

- Adding cross-session memory to your agent
- Calling your deployed agent from a web app, mobile app, or backend service
- Configuring VPC networking for private resources (RDS, internal APIs)
- Building multi-agent systems with orchestrator/specialist patterns
- Migrating an existing Bedrock Agent to AgentCore
- Adding the Browser tool so the agent can navigate websites
- Adding the Code Interpreter so the agent can execute code in a sandbox
- Adding AgentCore Payments so the agent can pay for x402- or MPP-protected APIs, tools, or content
- Removing resources from your project or tearing down a deployment

Do NOT use for:

- Connecting to external tools/APIs via Gateway (OpenAPI specs, Lambda, MCP servers, credentials, policies) → use `agents-connect`
- Scaffolding a new project → use `agents-get-started`
- Deploying → use `agents-deploy`

## Input

`$ARGUMENTS` can be:

- A capability: "memory", "integrate", "vpc", "multi-agent", "migrate", "browser", "code-interpreter", "payments", "teardown"
- A description of what they want: "remember user preferences", "call from React app", "scrape a website", "run pandas in the agent", "delete my agent", "clean up resources"
- Empty, the skill will determine the workflow from context

## Process

### Step 0: Verify CLI version

Run `agentcore --version`. This skill requires v0.9.0 or later.

If older: "Run `agentcore update` to get the latest version."

### Step 1: Read project context

Read `agentcore/agentcore.json` to understand the current project, framework, existing resources, agent configuration.

If `agentcore/agentcore.json` is not found:

The rest: https://github.com/aws/agent-toolkit-for-aws/blob/HEAD/plugins/aws-agents/skills/agents-build/SKILL.md