fix(continuation): mark atlas resumes synthetic

src/hooks/session-recovery/resume.test.ts

@@ -74,7 +74,14 @@ describe("session-recovery resume", () => {
     expect(promptBody?.variant).toBe("max")
     expect(promptBody?.tools).toEqual({ question: false, bash: true })
     expect(Array.isArray(promptBody?.parts)).toBe(true)
-    const firstPart = (promptBody?.parts as Array<{ text?: string }>)?.[0]
+    const firstPart = (promptBody?.parts as Array<{
+      text?: string
+      synthetic?: boolean
+      metadata?: Record<string, unknown>
+    }>)?.[0]
     expect(firstPart?.text).toContain(OMO_INTERNAL_INITIATOR_MARKER)
+    expect(firstPart?.synthetic).toBe(true)
+    expect(firstPart?.metadata?.compaction_continue).toBe(true)
+    expect(promptBody?.noReply).toBeUndefined()
   })
 })

src/hooks/session-recovery/resume.ts

@@ -1,6 +1,6 @@
 import type { createOpencodeClient } from "@opencode-ai/sdk"
 import type { MessageData, ResumeConfig } from "./types"
-import { createInternalAgentTextPart, resolveInheritedPromptTools } from "../../shared"
+import { createInternalAgentContinuationTextPart, resolveInheritedPromptTools } from "../../shared"
 
 const RECOVERY_RESUME_TEXT = "[session recovered - continuing previous task]"
 
@@ -35,7 +35,7 @@ export async function resumeSession(client: Client, config: ResumeConfig): Promi
     await client.session.promptAsync({
       path: { id: config.sessionID },
       body: {
-        parts: [createInternalAgentTextPart(RECOVERY_RESUME_TEXT)],
+        parts: [createInternalAgentContinuationTextPart(RECOVERY_RESUME_TEXT)],
         agent: config.agent,
         ...(launchModel ? { model: launchModel } : {}),
         ...(launchVariant ? { variant: launchVariant } : {}),