feat(harness): add experimental AgentCore Harness Strands adapter

[gautamsirdeshmukh]

Description

Introducing AgentCoreHarnessAgent, an implementation of the Strands InvokableAgent interface for a deployed AgentCore Harness. Now, developers can invoke their Harness agent and integrate it into their agentic applications / multi-agent Graphs just as easily as a typical Strands Agent today.

The deployed Harness continues to own its model, prompt, default tools, memory, limits, and
server-side agent loop, running in a managed microVM.

import { AgentCoreHarnessAgent } from 'bedrock-agentcore/experimental/harness/strands'

const agent = new AgentCoreHarnessAgent({
  harnessArn: '...',
  runtimeSessionId: '...',
})

await agent.invoke('Summarize your environment.')

Client-side custom tool calling powered by the Managed Harness' inline_function capability will be added in a separate PR.

Related Issues

strands-agents/harness-sdk#3052

Type of Change

New feature

Testing

How have you tested the change?

• I ran npm run check
• I ran the full unit test suite, lint, type checks, and build
• I verified the experimental package subpath and package contents

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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