refactor(core): fold initiator scope into agents

packages/core/agent-loop/tests/scope-lifecycle.spec.ts

@@ -8,7 +8,6 @@ import AgentRegistry, { agentEvents, assembleContextFor } from '@deepseek-ai/dsh
 
 import type { Agent } from '@deepseek-ai/dsh-agent'
 import { scopeOf } from '@deepseek-ai/dsh-scope'
-import AgentExecutionProvider from '@deepseek-ai/dsh-agent-execution'
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import type { ContentBlock } from '@deepseek-ai/dsh-llm'
 import { MockAdapter, textResponse } from './mock-adapter.ts'
@@ -20,7 +19,6 @@ async function harnessWithLoop(adapter: MockAdapter = new MockAdapter([textRespo
   await ctx.plugin(SystemPrompt, { persona: 'You are the deployment.' })
   await ctx.plugin(ToolRegistry)
   await ctx.plugin(AgentRegistry)
-  await ctx.plugin(AgentExecutionProvider)
   const loopFiber = await ctx.plugin(AgentLoop, { agents: [] })
   ctx.llm.registerAdapter(['mock'], adapter)
   return { ctx, loopFiber }