feat(orchestration-v2): attribute reused subagents to the run driving them (2/4)

apps/server/scripts/record-codex-app-server-replay-fixture.ts

@@ -27,6 +27,10 @@ import {
   SUBAGENT_CONTINUE_PARENT_PROMPT,
   SUBAGENT_CONTINUE_PROMPT,
   SUBAGENT_PROMPT,
+  SUBAGENT_REUSE_AFTER_IDLE_PROMPT,
+  SUBAGENT_REUSE_AFTER_IDLE_RESUME_PROMPT,
+  SUBAGENT_REUSE_AFTER_INTERRUPT_PROMPT,
+  SUBAGENT_REUSE_AFTER_INTERRUPT_RESUME_PROMPT,
   THREAD_ROLLBACK_AFTER_PROMPT,
   THREAD_ROLLBACK_FIRST_PROMPT,
   THREAD_ROLLBACK_SECOND_PROMPT,
@@ -73,6 +77,8 @@ const SCENARIO_NAMES = [
   "tool_call_restricted_granular",
   "subagent",
   "subagent_continue",
+  "subagent_reuse_after_interrupt",
+  "subagent_reuse_after_idle",
   "multi_turn",
   "provider_thread_resume",
   "todo_list",
@@ -445,6 +451,61 @@ function scenarios(): ReadonlyArray<ReplayScenario> {
         },
       ],
     },
+    {
+      name: "subagent_reuse_after_interrupt",
+      fileName: "subagent_reuse_after_interrupt.ndjson",
+      description:
+        "A root turn spawns a native Codex subagent and is interrupted while it works, then a later root turn re-activates the same child thread.",
+      runs: [
+        {
+          name: "reuse-after-interrupt",
+          description:
+            "Interrupt the spawning turn mid-subagent, then message the same subagent from a new root turn.",
+          turnDefaults: {
+            approvalPolicy: "never",
+            sandboxPolicy: workspaceWriteSandbox(),
+          },
+          steps: [
+            {
+              type: "interruptedTurn",
+              label: "spawn-subagent-then-interrupt",
+              prompt: SUBAGENT_REUSE_AFTER_INTERRUPT_PROMPT,
+              interruptAfterCommandExecutionStarted: true,
+            },
+            {
+              type: "turn",
+              label: "reuse-interrupted-subagent",
+              prompt: SUBAGENT_REUSE_AFTER_INTERRUPT_RESUME_PROMPT,
+            },
+          ],
+        },
+      ],
+    },
+    {
+      name: "subagent_reuse_after_idle",
+      fileName: "subagent_reuse_after_idle.ndjson",
+      description:
+        "A root turn spawns a native Codex subagent, then a later root turn re-activates it. Replay advances past the session idle timeout between turns so the adapter registry is empty on reuse.",
+      runs: [
+        {
+          name: "reuse-after-idle",
+          description:
+            "Second root turn messages the same subagent after the session would have been reaped.",
+          steps: [
+            {
+              type: "turn",
+              label: "spawn-subagent",
+              prompt: SUBAGENT_REUSE_AFTER_IDLE_PROMPT,
+            },
+            {
+              type: "turn",
+              label: "reuse-subagent-after-idle",
+              prompt: SUBAGENT_REUSE_AFTER_IDLE_RESUME_PROMPT,
+            },
+          ],
+        },
+      ],
+    },
     {
       name: "multi_turn",
       fileName: "multi_turn.ndjson",