File session.ts

packages/opencode/src/acp/session.ts:None–None

import type { McpServer } from "@agentclientprotocol/sdk"
import type { Message, Part } from "@opencode-ai/sdk/v2"
import { LayerNode } from "@opencode-ai/core/effect/layer-node"
import { ProviderV2 } from "@opencode-ai/core/provider"