fix(continuation): mark resumes synthetic

src/hooks/ralph-loop/continuation-prompt-injector.test.ts

@@ -61,15 +61,33 @@ describe("ralph-loop continuation prompt injector", () => {
 
   test("#given inherited message agent has ZWSP prefix #when injecting continuation prompt #then promptAsync receives normalized agent", async () => {
     // given
-    let promptBody: { agent?: string } | undefined
+    let promptBody: { agent?: string; noReply?: boolean } | undefined
+    let promptPart:
+      | {
+          text: string
+          synthetic?: boolean
+          metadata?: Record<string, unknown>
+        }
+      | undefined
     const ctx = {
       client: {
         session: {
           messages: async () => ({
             data: [{ info: { agent: "\u200bSisyphus - Ultraworker" } }],
           }),
-          promptAsync: async (input: { body: { agent?: string } }) => {
+          promptAsync: async (input: {
+            body: {
+              agent?: string
+              noReply?: boolean
+              parts?: Array<{
+                text: string
+                synthetic?: boolean
+                metadata?: Record<string, unknown>
+              }>
+            }
+          }) => {
             promptBody = input.body
+            promptPart = input.body.parts?.[0]
             return {}
           },
         },
@@ -87,6 +105,9 @@ describe("ralph-loop continuation prompt injector", () => {
     // then
     expect(promptBody?.agent).toBe("sisyphus")
     expect(promptBody?.agent).not.toContain("\u200b")
+    expect(promptBody?.noReply).toBeUndefined()
+    expect(promptPart?.synthetic).toBe(true)
+    expect(promptPart?.metadata?.compaction_continue).toBe(true)
   })
 
   test("#given inherited message agent has no ZWSP prefix #when injecting continuation prompt #then promptAsync receives normalized agent", async () => {

src/hooks/ralph-loop/continuation-prompt-injector.ts

@@ -4,7 +4,7 @@ import { findNearestMessageWithFields } from "../../features/hook-message-inject
 import { getMessageDir } from "./message-storage-directory"
 import { withTimeout } from "./with-timeout"
 import {
-	createInternalAgentTextPart,
+	createInternalAgentContinuationTextPart,
 	isRecord,
 	normalizeSDKResponse,
 	resolveInheritedPromptTools,
@@ -126,7 +126,7 @@ export async function injectContinuationPrompt(
 				...(launchModel ? { model: launchModel } : {}),
 				...(launchVariant ? { variant: launchVariant } : {}),
 				...(inheritedTools ? { tools: inheritedTools } : {}),
-				parts: [createInternalAgentTextPart(options.prompt)],
+				parts: [createInternalAgentContinuationTextPart(options.prompt)],
 			},
 			query: { directory: options.directory },
 		})