feat(core): moving sessions (#30640)

packages/core/src/session/event.ts

@@ -7,6 +7,8 @@ import { ToolOutput } from "../tool-output"
 import { V2Schema } from "../v2-schema"
 import { FileAttachment, Prompt } from "./prompt"
 import { SessionSchema } from "./schema"
+import { Location } from "../location"
+import { RelativePath } from "../schema"
 
 export { FileAttachment }
 
@@ -65,6 +67,17 @@ export const ModelSwitched = EventV2.define({
 })
 export type ModelSwitched = typeof ModelSwitched.Type
 
+export const Moved = EventV2.define({
+  type: "session.next.moved",
+  ...options,
+  schema: {
+    ...Base,
+    location: Location.Ref,
+    subdirectory: RelativePath.pipe(Schema.optional),
+  },
+})
+export type Moved = typeof Moved.Type
+
 export const Prompted = EventV2.define({
   type: "session.next.prompted",
   ...options,
@@ -387,6 +400,7 @@ export namespace Compaction {
 const DurableDefinitions = [
   AgentSwitched,
   ModelSwitched,
+  Moved,
   Prompted,
   Synthetic,
   Shell.Started,