fix(llm): isolate retry policy histories

packages/examples/agent-spine-demo/tests/agent-core.spec.ts

@@ -594,6 +594,14 @@ describe('dsh-agent-spine-demo bundle', () => {
     expect(agentCore.name).toBe('agent-spine-demo')
   })
 
+  it('rejects bundle-level llmRetry config through plugin validation', async () => {
+    const ctx = new Context()
+    await expect(ctx.plugin(agentCore, {
+      workspaceContext: false,
+      llmRetry: { maxTransientRetries: 2 },
+    } as never)).rejects.toThrow(/llmRetry/)
+  })
+
   it('has the namespace-plugin export shape (no stray default) so the Loader keeps name/Config/apply', () => {
     // A default export would make `unwrapExports` collapse this inject-less namespace and silently
     // drop `name`/`Config`. Apps import the bundle directly, so this is its Loader-shape guard.