test(spill-policy): guard loader export shape

packages/spill/spill-policy/tests/spill-policy.spec.ts

@@ -10,6 +10,7 @@
 
 import { describe, expect, it, vi } from 'vitest'
 import { Context } from 'cordis'
+import Loader from '@cordisjs/plugin-loader'
 import { CallId } from '@deepseek-ai/dsh-llm'
 import type { ContentBlock } from '@deepseek-ai/dsh-llm'
 import { SessionId } from '@deepseek-ai/dsh-session'
@@ -82,6 +83,20 @@ describe('disabled mode', () => {
   })
 })
 
+describe('loader export shape', () => {
+  it('has no default export and keeps name/inject/Config through unwrapExports', () => {
+    expect('default' in SpillPolicy).toBe(false)
+
+    const loader = Object.create(Loader.prototype) as Loader
+    const unwrapped = loader.unwrapExports(SpillPolicy) as Record<string, unknown>
+    expect(unwrapped).toBe(SpillPolicy)
+    expect(unwrapped.name).toBe('spill-policy')
+    expect(unwrapped.inject).toEqual(['tools'])
+    expect(unwrapped.Config).toBeDefined()
+    expect(typeof unwrapped.apply).toBe('function')
+  })
+})
+
 describe('config validation', () => {
   it('rejects a negative maxInlineBytes at load', async () => {
     await expect(setup({ maxInlineBytes: -1 })).rejects.toThrow(/non-negative integer/)