# InMemory Transport Plugin

## Module
Router

## Status
IMPLEMENTED

## Description
In-process transport using System.Threading.Channels for development and testing. Implements InMemoryTransportServer, InMemoryTransportClient, InMemoryConnectionRegistry, and InMemoryChannel with zero-copy semantics.

## Implementation Details
- **Modules**: `src/Router/__Libraries/StellaOps.Router.Transport.InMemory/`
- **Key Classes**:
  - `InMemoryTransportPlugin` (`src/Router/__Libraries/StellaOps.Router.Transport.InMemory/InMemoryTransportPlugin.cs`) - plugin registration for in-memory transport
  - `InMemoryTransportServer` (`src/Router/__Libraries/StellaOps.Router.Transport.InMemory/InMemoryTransportServer.cs`) - in-process transport server using System.Threading.Channels
  - `InMemoryTransportClient` (`src/Router/__Libraries/StellaOps.Router.Transport.InMemory/InMemoryTransportClient.cs`) - in-process transport client with zero-copy semantics
  - `InMemoryConnectionRegistry` (`src/Router/__Libraries/StellaOps.Router.Transport.InMemory/InMemoryConnectionRegistry.cs`) - tracks in-memory connections between server and clients
  - `InMemoryChannel` (`src/Router/__Libraries/StellaOps.Router.Transport.InMemory/InMemoryChannel.cs`) - channel-based communication pipe
- **Interfaces**: `IRouterTransportPlugin`, `ITransportServer`, `ITransportClient`, `IMicroserviceTransport`
- **Source**: batch_51/file_17.md

## E2E Test Plan
- [ ] Register `InMemoryTransportPlugin` and verify a gateway and microservice can communicate in-process
- [ ] Send a request through `InMemoryTransportClient` and verify `InMemoryTransportServer` receives and processes it
- [ ] Verify zero-copy semantics: confirm no additional memory allocations for frame payload transfer
- [ ] Verify `InMemoryConnectionRegistry` tracks active connections
- [ ] Verify concurrent request handling: send multiple requests in parallel and confirm all complete