refactor: identify and freeze messages at creation

packages/session-title/session-title/tests/persistence.spec.ts

@@ -1,3 +1,4 @@
+import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import { afterEach, describe, expect, it } from 'vitest'
 import { Context } from 'cordis'
 import { mkdtemp, rm } from 'node:fs/promises'
@@ -26,10 +27,10 @@ async function appendPersistedTitle(ctx: Context, id: ReturnType<typeof SessionI
     turn: 1,
     trigger: { kind: 'message', source: { kind: 'user' } },
   })
-  session.append('user/message', {
+  session.append('user/message', createUserMessage({
     content: [{ type: 'text', text: 'Persist this session title' }],
     source: { kind: 'user' },
-  }, { surfaceOp: 'append' })
+  }), { surfaceOp: 'append' })
   await new Promise(resolve => setTimeout(resolve, 0))
   session.append('turn/end', { turn: 1, reason: { kind: 'completed' } })
   await ctx.parallel('session/flush', session)

packages/session-title/session-title/tests/provider.spec.ts

@@ -1,6 +1,6 @@
 import { Context } from 'cordis'
 import { describe, expect, it, vi } from 'vitest'
-import LlmService, { deepFreeze, markAgentLoopRequest } from '@deepseek-ai/dsh-llm'
+import LlmService, { createUserMessage, deepFreeze, markAgentLoopRequest  } from '@deepseek-ai/dsh-llm'
 import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
 import SessionTitleService, {
   SessionTitleProviderId,
@@ -34,10 +34,10 @@ async function settle(): Promise<void> {
 }
 
 function appendHumanPrompt(session: ReturnType<Context['sessions']['create']>, text: string) {
-  return session.append('user/message', {
+  return session.append('user/message', createUserMessage({
     content: [{ type: 'text', text }],
     source: { kind: 'user' },
-  }, { surfaceOp: 'append' })
+  }), { surfaceOp: 'append' })
 }
 
 function appendRoute(session: ReturnType<Context['sessions']['create']>, reason: 'initial' | 'change' = 'initial'): void {

packages/session-title/session-title/tests/service-contracts.spec.ts

@@ -1,3 +1,4 @@
+import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import { Context, type Fiber } from 'cordis'
 import { describe, expect, it, vi } from 'vitest'
 import SessionStore, { Session, SessionId } from '@deepseek-ai/dsh-session'
@@ -53,10 +54,10 @@ function startSession(ctx: Context, id: string): ReturnType<Context['sessions'][
 }
 
 function appendPrompt(session: ReturnType<Context['sessions']['create']>, text: string) {
-  return session.append('user/message', {
+  return session.append('user/message', createUserMessage({
     content: [{ type: 'text', text }],
     source: { kind: 'user' },
-  }, { surfaceOp: 'append' })
+  }), { surfaceOp: 'append' })
 }
 
 describe('SessionTitleService configuration and refresh boundaries', () => {

packages/session-title/session-title/tests/session-title.spec.ts

@@ -1,3 +1,4 @@
+import { createUserMessage } from '@deepseek-ai/dsh-llm'
 import { Context } from 'cordis'
 import { describe, expect, it } from 'vitest'
 import SessionStore, { Session, SessionId } from '@deepseek-ai/dsh-session'
@@ -44,10 +45,10 @@ describe('SessionTitleService', () => {
       turn: 1,
       trigger: { kind: 'message', source: { kind: 'user' } },
     })
-    const message = session.append('user/message', {
+    const message = session.append('user/message', createUserMessage({
       content: [{ type: 'text', text: '  Build\nlog-backed session titles please  ' }],
       source: { kind: 'user' },
-    }, { surfaceOp: 'append' })
+    }), { surfaceOp: 'append' })
 
     await settleTitles()
 
@@ -81,10 +82,10 @@ describe('SessionTitleService', () => {
       turn: 1,
       trigger: { kind: 'message', source: { kind: 'user' } },
     })
-    session.append('user/message', {
+    session.append('user/message', createUserMessage({
       content: [{ type: 'text', text: 'Explain this referenced session' }],
       source: { kind: 'user' },
-    }, { surfaceOp: 'append' })
+    }), { surfaceOp: 'append' })
 
     await settleTitles()
 
@@ -100,31 +101,31 @@ describe('SessionTitleService', () => {
       turn: 1,
       trigger: { kind: 'message', source: { kind: 'user' } },
     })
-    session.append('user/message', {
+    session.append('user/message', createUserMessage({
       content: [{ type: 'text', text: 'plugin text' }],
       source: { kind: 'plugin', plugin: 'seed' },
-    }, { surfaceOp: 'append' })
-    session.append('user/message', {
+    }), { surfaceOp: 'append' })
+    session.append('user/message', createUserMessage({
       content: [{ type: 'reasoning', text: 'not visible text' }],
       source: { kind: 'user' },
-    }, { surfaceOp: 'append' })
-    session.append('user/message', {
+    }), { surfaceOp: 'append' })
+    session.append('user/message', createUserMessage({
       content: [{ type: 'text', text: ' \n\t ' }],
       source: { kind: 'user' },
-    }, { surfaceOp: 'append' })
+    }), { surfaceOp: 'append' })
     await settleTitles()
     expect(ctx.sessionTitle.get(session)).toBeUndefined()
 
-    const eligible = session.append('user/message', {
+    const eligible = session.append('user/message', createUserMessage({
       content: [{ type: 'text', text: 'first real prompt' }],
       source: { kind: 'user' },
-    }, { surfaceOp: 'append' })
+    }), { surfaceOp: 'append' })
     await settleTitles()
     const first = ctx.sessionTitle.get(session)
-    session.append('user/message', {
+    session.append('user/message', createUserMessage({
       content: [{ type: 'text', text: 'later prompt' }],
       source: { kind: 'user' },
-    }, { surfaceOp: 'append' })
+    }), { surfaceOp: 'append' })
     await settleTitles()
 
     expect(first?.messageSeqs).toEqual([eligible.seq])