refactor(agent-loop): separate injected context from turns

packages/core/session/tests/invariant.spec.ts

@@ -102,7 +102,7 @@ describe('session-log invariants', () => {
     } as never) }).toThrow(/seq must strictly increase/)
   })
 
-  it('enforces turn numbering and enclosure', async () => {
+  it('enforces turn numbering and encloses events other than idle context', async () => {
     const first = await setup()
     const open = first.ctx.sessions.create()
     open.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
@@ -119,9 +119,9 @@ describe('session-log invariants', () => {
 
     const outside = (await setup()).ctx.sessions.create()
     expect(() => outside.append('user/message', {
-      content: [{ type: 'text', text: 'hi' }],
-      source: { kind: 'user' },
-    }, { surfaceOp: 'append' })).toThrow(/outside any open turn/)
+      content: [{ type: 'text', text: 'idle context' }],
+      source: { kind: 'plugin', plugin: 'test' },
+    }, { surfaceOp: 'append' })).not.toThrow()
     expect(() => outside.append('steering/message', {
       turn: 1,
       content: [{ type: 'text', text: 'go' }],

packages/core/session/tests/session.spec.ts

@@ -2,7 +2,6 @@ import { describe, expect, expectTypeOf, it, vi } from 'vitest'
 import { Context } from 'cordis'
 import { CallId } from '@deepseek-ai/dsh-llm'
 import SessionStore, {
-  displayPromptContent,
   findLastMessageTurnEnd,
   SESSION_FORMAT_VERSION,
   Session,
@@ -136,35 +135,6 @@ describe('Session', () => {
     expect(steeringMessage!.content).toEqual([{ type: 'text', text: 'focus on tests' }])
   })
 
-  it('derives baked prompt context while exposing only the direct prompt for display', () => {
-    const session = new Session(SessionId('prompt-envelope'))
-    const event = session.append('user/message', {
-      content: [
-        { type: 'text', text: 'background' },
-        { type: 'text', text: '\n\n## My request:\n' },
-        { type: 'text', text: 'question' },
-      ],
-      source: { kind: 'user' },
-      envelope: {
-        displayContent: [{ type: 'text', text: 'question' }],
-        prefixContexts: [{ source: { kind: 'plugin', plugin: 'reference' } }],
-      },
-    }, { surfaceOp: 'append' })
-
-    expect(session.deriveMessages()).toEqual([{
-      role: 'user',
-      content: [
-        { type: 'text', text: 'background' },
-        { type: 'text', text: '\n\n## My request:\n' },
-        { type: 'text', text: 'question' },
-      ],
-    }])
-    expect(displayPromptContent(event.data)).toEqual([{ type: 'text', text: 'question' }])
-    expect(Object.isFrozen(event.data.envelope?.displayContent)).toBe(true)
-    expect(new Session(SessionId('prompt-envelope-replay'), session.events).deriveMessages())
-      .toEqual(session.deriveMessages())
-  })
-
   it('keeps context source durable in the event while hiding it from the projection', () => {
     const session = new Session(SessionId('s2-raw'))
     session.append('user/message', {