refactor(agent): complete inbox lifecycle migration

packages/core/agent-loop/tests/runtime-context.spec.ts

@@ -0,0 +1,39 @@
+import { describe, expect, it } from 'vitest'
+import { Context } from 'cordis'
+import { createUserMessage } from '@deepseek-ai/dsh-llm'
+import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
+import { RuntimeContextProjection } from '../src/runtime-context.ts'
+
+const SOURCE = '@deepseek-ai/dsh-system-prompt'
+
+function contextMessage(text: string) {
+  return createUserMessage({
+    content: [{ type: 'text', text }],
+    source: { kind: 'plugin', plugin: SOURCE },
+  })
+}
+
+describe('RuntimeContextProjection', () => {
+  it('restores the latest visible owned snapshot and ignores other sessions', async () => {
+    const ctx = new Context()
+    await ctx.plugin(SessionStore)
+    const session = ctx.sessions.create(SessionId('runtime-context-replay'))
+    const retained = session.append('user/message', contextMessage('retained'), { surfaceOp: 'append' })
+    const shadowed = session.append('user/message', contextMessage('shadowed'), { surfaceOp: 'append' })
+    session.append('user/message', createUserMessage({
+      content: [{ type: 'text', text: 'summary' }],
+      source: { kind: 'plugin', plugin: 'test-compaction' },
+    }), {
+      surfaceOp: { op: 'replace', start: shadowed.seq, end: shadowed.seq },
+      sourceEventSeqs: [shadowed.seq],
+    })
+
+    const projection = new RuntimeContextProjection(ctx, session)
+    expect(session.surface.nodes).toContain(retained.seq)
+    expect(projection.project('retained')).toBeUndefined()
+
+    const other = ctx.sessions.create(SessionId('runtime-context-other'))
+    other.append('user/message', contextMessage('other'), { surfaceOp: 'append' })
+    expect(projection.project('retained')).toBeUndefined()
+  })
+})