fix(workspace-context): guard baseline restoration

packages/core/agent/tests/agent.spec.ts

@@ -4,6 +4,8 @@ import type { Events } from 'cordis'
 import { Session, SessionId } from '@deepseek-ai/dsh-session'
 import AgentRegistry, {
   agentEvents,
+  assembleContextFor,
+  assembleRequestContextFor,
 } from '@deepseek-ai/dsh-agent'
 
 import type {
@@ -187,6 +189,23 @@ describe('agentEvents()', () => {
   })
 })
 
+describe('agent prompt assembly context', () => {
+  it('marks only request-owned assemblies for model materialization', () => {
+    const agent = stubAgent('assembly')
+    const signal = new AbortController().signal
+
+    expect(assembleContextFor(agent, signal)).toEqual({ agent, scope: agent, signal })
+    expect(assembleRequestContextFor(agent, signal)).toEqual({
+      agent,
+      scope: agent,
+      signal,
+      modelRequest: true,
+    })
+    expect(assembleContextFor(agent)).toEqual({ agent, scope: agent })
+    expect(assembleRequestContextFor(agent)).toEqual({ agent, scope: agent, modelRequest: true })
+  })
+})
+
 describe('explicit cancellation contract', () => {
   it('exposes the closed typed cancellation cause at the Agent seam', () => {
     expectTypeOf<Parameters<Agent['cancel']>[0]>().toEqualTypeOf<AgentCancelCause>()