fix room save shape

CLAUDE.md

@@ -74,13 +74,15 @@ inconsistency here without checking the client first.
   `{ error, success, value: null }` — e.g. `clubs` `PUT /club/:id/clubhouse` left the old
   clubhouse on screen until it answered the full details envelope.
 - Every subroom mutation (`rooms`: create, delete, `/subrooms/:sid/clone`,
-  `/subrooms/:sid/accessibility`, `/subrooms/:sid/data`, `/subrooms/:sid/publish_save`)
-  answers `{ success, error, value }` with the whole updated ROOM — the client re-renders
-  the room from `value`. Notably `value` is the room even for `clone`, whose product is a
-  new SUBROOM, and even for `data`, whose product is a SAVE; only the room-level
-  `POST /rooms/:id/clone` returns the thing it created. A bare subroom from `data` leaves
-  the old scene on screen even though the save landed — the symptom is "saved fine in the
-  DB, didn't update visually".
+  `/subrooms/:sid/accessibility`, `/subrooms/:sid/publish_save`) answers
+  `{ success, error, value }` with the whole updated ROOM — the client re-renders the room
+  from `value`. Notably `value` is the room even for `clone`, whose product is a new
+  SUBROOM; only the room-level `POST /rooms/:id/clone` returns the thing it created.
+- The room save (`rooms`: `POST /subrooms/:sid/data`) is the ONE exception to that shape:
+  `value` is `{ room, subRoomDataSave }`, and `error` is NULL rather than `""`. The
+  `subRoomDataSave` is camelCase with a different field set from the PascalCase
+  `CurrentSave` embedded in the room (no persistence/OM/UGC versions, no moderation state,
+  no asset arrays; but `unityAsset`/`unityAssetHash`). Don't unify the two projections.
 - A subroom's saved scene loads from `CurrentSave.DataBlob` (`rooms`: `GET /rooms/:id`),
   NOT the flat `DataBlob` on the subroom — a subroom with no `CurrentSave` silently loads
   nothing. The key must be present (null before the first publish); read it via

apps/rooms/src/openapi.ts

@@ -138,6 +138,31 @@ export const LoadScreenDto = z.object({
 	Subtitle: z.string(),
 })
 
+/**
+ * The save as the room-save RESPONSE renders it — camelCase, and a different field set
+ * from the PascalCase `CurrentSave` embedded in a room (no persistence/OM/UGC versions,
+ * no moderation state, no asset arrays; but `unityAsset`/`unityAssetHash`/`dataBlobHash`
+ * that `CurrentSave` doesn't show). The two are deliberately not unified.
+ */
+export const SubRoomDataSaveResponseDto = z.object({
+	subRoomDataSaveId: z.int(),
+	subRoomId: z.int(),
+	unityAssetId: z.string().nullable().describe('Null unless the save carried one'),
+	unityAsset: z.string().nullable().describe('Always null — we resolve no baked assets'),
+	unityAssetHash: z.string().nullable().describe('Always null — we resolve no baked assets'),
+	dataBlob: z.string(),
+	dataBlobHash: z.string().nullable().describe('Echoed from the request’s `SubRoomData.Hash`'),
+	savedByAccountId: z.int().nullable(),
+	savedOnPlatform: z
+		.int()
+		.describe(
+			'Steam=0 Oculus=1 PlayStation=2 Xbox=3 RecNet=4 IOS=5 GooglePlay=6 Standalone=7 Pico=8'
+		),
+	savedOnDeviceClass: z.int().describe('Unknown=0 VR=1 Screen=2 Mobile=3 VRLow=4 Quest2=5'),
+	description: z.string().nullable(),
+	createdAt: z.string(),
+})
+
 /**
  * A subroom's most recent room save — the `SubRoomDataSave` the client reads to find the
  * scene-data blob to download. This is the ONLY place the loader looks for it, so a
@@ -351,6 +376,20 @@ export const RoomEnvelope = z.object({
 	value: RoomDto.nullable(),
 })
 
+/**
+ * What `POST /rooms/{roomId}/subrooms/{subRoomId}/data` answers: `value` carries BOTH the
+ * updated room and the save that was just created. Note `error` is NULL here, not the
+ * empty string the other room envelopes use.
+ */
+export const RoomSaveEnvelope = z.object({
+	success: z.boolean(),
+	error: z.string().nullable().describe('Null on success'),
+	value: z
+		.object({ room: RoomDto, subRoomDataSave: SubRoomDataSaveResponseDto })
+		.nullable()
+		.describe('Null on a rejection'),
+})
+
 /** The 401 the envelope-returning routes answer with — the only one that isn’t HTTP 200. */
 export const UNAUTHORIZED_ENVELOPE = json(
 	z.object({ success: z.literal(false), error: z.literal('Unauthorized'), value: z.null() }),

apps/rooms/src/rooms.app.ts

@@ -75,6 +75,7 @@ import {
 	roomIdParam,
 	RoomLookup,
 	RoomResultEnvelope,
+	RoomSaveEnvelope,
 	SaveSubRoomDataRequest,
 	ServiceStatus,
 	stringQuery,
@@ -271,6 +272,33 @@ function roomResult(
 	})
 }
 
+/**
+ * The room save's `value.subRoomDataSave` — a camelCase projection with a DIFFERENT
+ * field set from the PascalCase `CurrentSave` embedded in a room (no persistence/OM/UGC
+ * versions, no moderation state, no asset arrays; but `unityAsset`/`unityAssetHash`
+ * that `CurrentSave` never shows). Don't unify the two without checking the client.
+ *
+ * `unityAsset`/`unityAssetHash` are always null: we resolve no baked Unity assets.
+ */
+function toSaveResponse(save: Record<string, unknown>) {
+	const str = (v: unknown) => (typeof v === 'string' ? v : null)
+	const num = (v: unknown) => (typeof v === 'number' ? v : null)
+	return {
+		subRoomDataSaveId: num(save.SubRoomDataSaveId),
+		subRoomId: num(save.SubRoomId),
+		unityAssetId: str(save.UnityAssetId),
+		unityAsset: null,
+		unityAssetHash: null,
+		dataBlob: str(save.DataBlob) ?? '',
+		dataBlobHash: str(save.DataBlobHash),
+		savedByAccountId: num(save.SavedByAccountId),
+		savedOnPlatform: num(save.SavedOnPlatform) ?? 0,
+		savedOnDeviceClass: num(save.SavedOnDeviceClass) ?? 0,
+		description: str(save.Description),
+		createdAt: str(save.CreatedAt) ?? '',
+	}
+}
+
 /** Client envelope for room mutations: `{ success, error, value }` (lowercase). */
 function roomEnvelope(c: Context<App>, value: unknown, error = '') {
 	return c.json({ success: error === '', error, value })
@@ -1504,9 +1532,10 @@ const app = new Hono<App>()
 				'`POST …/subrooms/{subRoomId}/publish_save`. DORMS always publish — they have no',
 				'publish step in the client, so staging one would hide the player’s own edits.',
 				'',
-				'Answers the whole updated ROOM in the `{ success, error, value }` envelope, like',
-				'every other subroom mutation — the client re-renders from `value`, and a bare',
-				'subroom leaves the old scene on screen even though the save landed.',
+				'`value` carries BOTH the updated `room` and the `subRoomDataSave` just created,',
+				'and `error` is NULL here rather than the empty string the other room envelopes',
+				'use. The save is projected in camelCase with a different field set from the',
+				'PascalCase `CurrentSave` embedded in the room — the two are not the same shape.',
 				'A subroom with no `CreatorAccountId` yet (the seeded rooms start null) gets the',
 				'saver’s id here, because the client NREs on a null one.',
 			].join('\n'),
@@ -1514,7 +1543,7 @@ const app = new Hono<App>()
 			parameters: [roomIdParam, subRoomIdParam],
 			requestBody: jsonBody(SaveSubRoomDataRequest, 'The uploaded blob keys and save fields'),
 			responses: {
-				200: json(RoomEnvelope, 'The updated room, or a rejection with `success: false`'),
+				200: json(RoomSaveEnvelope, 'The updated room + the new save, or a rejection'),
 				401: UNAUTHORIZED_EMPTY,
 				403: FORBIDDEN_RESPONSE,
 			},
@@ -1527,7 +1556,9 @@ const app = new Hono<App>()
 			const subRoomId = Number.parseInt(c.req.param('subRoomId'), 10)
 
 			const room = await getRoomById(c.env.DB, roomId)
-			if (!room) return roomEnvelope(c, null, 'This room does not exist!')
+			if (!room) {
+				return c.json({ success: false, error: 'This room does not exist!', value: null })
+			}
 			// A valid token but not the room's owner/co-owner → 403 (the auth gate above
 			// already returned 401 for a missing/invalid token).
 			if (!canManageRoom(room, accountId)) return c.body(null, 403)
@@ -1537,7 +1568,7 @@ const app = new Hono<App>()
 			// metadata blob. `OwnershipProof` is accepted and ignored.
 			const body = (await c.req.json().catch(() => ({}))) as {
 				RoomData?: { Filename?: string }
-				SubRoomData?: { Filename?: string }
+				SubRoomData?: { Filename?: string; Hash?: string | null }
 				UnityAssetId?: string | null
 				Description?: string
 				PersistenceVersion?: number
@@ -1545,8 +1576,10 @@ const app = new Hono<App>()
 				AutoPublish?: boolean
 			}
 
-			const updated = await saveSubRoomData(c.env.DB, roomId, subRoomId, accountId, {
+			const result = await saveSubRoomData(c.env.DB, roomId, subRoomId, accountId, {
 				subRoomDataFilename: body.SubRoomData?.Filename,
+				subRoomDataHash:
+					typeof body.SubRoomData?.Hash === 'string' ? body.SubRoomData.Hash : undefined,
 				roomDataFilename: body.RoomData?.Filename,
 				unityAssetId: typeof body.UnityAssetId === 'string' ? body.UnityAssetId : undefined,
 				autoPublish: body.AutoPublish === true,
@@ -1555,14 +1588,18 @@ const app = new Hono<App>()
 					typeof body.PersistenceVersion === 'number' ? body.PersistenceVersion : undefined,
 				inventionUsage: typeof body.InventionUsage === 'string' ? body.InventionUsage : undefined,
 			})
-			if (!updated) return roomEnvelope(c, null, 'This subroom does not exist!')
+			if (!result) {
+				return c.json({ success: false, error: 'This subroom does not exist!', value: null })
+			}
 
-			// The whole updated ROOM, like every other subroom mutation — the client
-			// re-renders the room from `value` and does NOT pick up a bare subroom, so
-			// answering with just the saved subroom leaves the old scene on screen even
-			// though the save landed.
-			await pushRoomUpdate(c, accountId, updated)
-			return roomEnvelope(c, updated)
+			// `value` carries BOTH the updated room and the save just created — and `error`
+			// is null here, not the empty string the other room envelopes use.
+			await pushRoomUpdate(c, accountId, result.room)
+			return c.json({
+				success: true,
+				error: null,
+				value: { room: result.room, subRoomDataSave: toSaveResponse(result.save) },
+			})
 		}
 	)
 

apps/rooms/src/test/integration/api.test.ts

@@ -989,16 +989,40 @@ describe('rooms endpoints', () => {
 		})
 		expect(await envOf(await authed(2, 9999, '1'))).toMatchObject({ success: false })
 
-		// Owner saves → 200 with the whole updated ROOM in the envelope. A bare subroom
-		// here leaves the client showing the old scene even though the save landed. This
-		// fixture sends `AutoPublish: true`, so the save goes live immediately.
+		// Owner saves → 200. `value` carries BOTH the updated room and the new save, and
+		// `error` is null (not ''). This fixture sends `AutoPublish: true`, so it goes live.
 		const ok = await authed(2, 2, '1')
 		expect(ok.status).toBe(200)
-		const saved = await envOf(ok)
+		const saved = (await ok.json()) as {
+			success: boolean
+			error: string | null
+			value: {
+				room: Record<string, unknown>
+				subRoomDataSave: Record<string, unknown>
+			}
+		}
 		expect(saved.success).toBe(true)
-		expect(saved.value).toMatchObject({ RoomId: 2, Description: 'mydescription here' })
+		expect(saved.error).toBeNull()
+		expect(saved.value.room).toMatchObject({ RoomId: 2, Description: 'mydescription here' })
+
+		// The save is a camelCase projection, NOT the PascalCase CurrentSave shape.
+		expect(saved.value.subRoomDataSave).toEqual({
+			subRoomDataSaveId: expect.any(Number),
+			subRoomId: 2,
+			unityAssetId: null,
+			unityAsset: null,
+			unityAssetHash: null,
+			dataBlob: 'a84167b16796452ab70ee8a6a5b1dc5f',
+			dataBlobHash: null,
+			savedByAccountId: 1,
+			savedOnPlatform: 0,
+			savedOnDeviceClass: 0,
+			description: 'mydescription here',
+			createdAt: expect.any(String),
+		})
+
 		// The saved subroom rides along inside the room's SubRooms, carrying the new save.
-		const savedSub = (saved.value!.SubRooms as Array<Record<string, unknown>>).find(
+		const savedSub = (saved.value.room.SubRooms as Array<Record<string, unknown>>).find(
 			(s) => s.SubRoomId === 2
 		)!
 		expect(savedSub).toMatchObject({
@@ -1047,11 +1071,16 @@ describe('rooms endpoints', () => {
 		// with the room envelope. The creator stays account 1 (not clobbered).
 		const coOwner = await authed(2, 2, '2')
 		expect(coOwner.status).toBe(200)
-		const coOwnerEnv = await envOf(coOwner)
+		const coOwnerEnv = (await coOwner.json()) as {
+			success: boolean
+			value: { room: { SubRooms: Array<Record<string, unknown>> }; subRoomDataSave: unknown }
+		}
 		expect(coOwnerEnv.success).toBe(true)
-		expect(
-			(coOwnerEnv.value!.SubRooms as Array<Record<string, unknown>>).find((s) => s.SubRoomId === 2)
-		).toMatchObject({ CreatorAccountId: 1 })
+		expect(coOwnerEnv.value.room.SubRooms.find((s) => s.SubRoomId === 2)).toMatchObject({
+			CreatorAccountId: 1,
+		})
+		// The save records who actually saved it, not the room's creator.
+		expect(coOwnerEnv.value.subRoomDataSave).toMatchObject({ savedByAccountId: 2 })
 	})
 
 	it('GET /rooms/:id gives every subroom a CurrentSave key (null before the first save)', async () => {
@@ -1125,9 +1154,9 @@ describe('rooms endpoints', () => {
 			UgcSubVersion: 0,
 			ModerationState: 0,
 		})
-		// No DataBlobHash — it is commented out of the reference DTO — and no UnityAssetId
-		// key at all, since the client sent null.
-		expect('DataBlobHash' in live.CurrentSave!).toBe(false)
+		// DataBlobHash rides along (null — the client sent `Hash: null`); UnityAssetId is
+		// omitted entirely rather than nulled, since the save carried none.
+		expect(live.CurrentSave!.DataBlobHash).toBeNull()
 		expect('UnityAssetId' in live.CurrentSave!).toBe(false)
 
 		// It's on the room read too — that's what the loader actually fetches.

packages/domain/src/rooms-db.ts

@@ -312,6 +312,8 @@ export function findSubRoom(room: Room, subRoomId: number): SubRoom | undefined
 export interface SaveSubRoomDataInput {
 	/** Uploaded blob key for this subroom's scene data (becomes `CurrentSave.DataBlob`). */
 	subRoomDataFilename?: string
+	/** `SubRoomData.Hash` — echoed back as the save response's `dataBlobHash`. */
+	subRoomDataHash?: string
 	/** Uploaded blob key for the room-level METADATA blob (a separate upload). */
 	roomDataFilename?: string
 	description?: string
@@ -354,6 +356,7 @@ export function subRoomDataBlob(sub: SubRoom | undefined | null): string {
 interface BuildSaveInput {
 	subRoomId: unknown
 	dataBlob: string
+	dataBlobHash: string | null
 	persistenceVersion: number
 	savedByAccountId: unknown
 	description: string
@@ -379,6 +382,10 @@ function buildSubRoomSave(input: BuildSaveInput): SubRoomDataSave {
 		ReferencedUnityAssets: [],
 		SubRoomId: input.subRoomId,
 		DataBlob: input.dataBlob,
+		// The client sends `SubRoomData.Hash` (usually null); the room-save response echoes
+		// it as `dataBlobHash`. One observed room payload carries it on `CurrentSave` and
+		// another omits it, so storing it and letting it ride along is the safe reading.
+		DataBlobHash: input.dataBlobHash,
 		ReferencedUnityAssetIds: [],
 		PersistenceVersion: input.persistenceVersion,
 		OMVersion: 0,
@@ -412,6 +419,7 @@ function legacySubRoomSave(sub: SubRoom): SubRoomDataSave | null {
 	return buildSubRoomSave({
 		subRoomId: sub.SubRoomId,
 		dataBlob: blob,
+		dataBlobHash: null,
 		persistenceVersion: typeof sub.PersistenceVersion === 'number' ? sub.PersistenceVersion : 0,
 		// The legacy shape never recorded who saved; the subroom's creator is the best
 		// available answer (the save path is owner/co-owner gated).
@@ -423,8 +431,8 @@ function legacySubRoomSave(sub: SubRoom): SubRoomDataSave | null {
 
 /**
  * Persist a room-save against a specific subroom and record the room-level fields the
- * save carries. Returns the updated (hydrated) room, or null when the room or subroom
- * doesn't exist.
+ * save carries. Returns the updated (hydrated) room AND the save that was just created —
+ * the route answers with both — or null when the room or subroom doesn't exist.
  *
  * Whether the save goes live is the client's call: `AutoPublish: true` publishes it
  * outright, otherwise it becomes the subroom's `staged_save_id` with the live
@@ -438,7 +446,7 @@ export async function saveSubRoomData(
 	subRoomId: number,
 	accountId: number,
 	input: SaveSubRoomDataInput
-): Promise<Room | null> {
+): Promise<{ room: Room; save: SubRoomDataSave } | null> {
 	const room = await getRoomById(db, roomId)
 	if (!room) return null
 	// Read off the already-hydrated room rather than re-querying the subroom and its
@@ -475,6 +483,7 @@ export async function saveSubRoomData(
 			// A save that carries no new blob (e.g. a description-only save) keeps the one
 			// the subroom already loads from.
 			dataBlob: input.subRoomDataFilename ?? (typeof priorBlob === 'string' ? priorBlob : ''),
+			dataBlobHash: input.subRoomDataHash ?? null,
 			persistenceVersion:
 				input.persistenceVersion ?? (typeof priorVersion === 'number' ? priorVersion : 0),
 			savedByAccountId: accountId,
@@ -517,7 +526,8 @@ export async function saveSubRoomData(
 	])
 
 	// Re-hydrate so the returned room reflects the just-saved subroom.
-	return hydrateRoom(db, room)
+	await attachSubRooms(db, [room])
+	return { room, save }
 }
 
 /**