feat(desktop): scope tabs to windows (#34669)

packages/app/e2e/performance/timeline/timeline-test-helpers.ts

@@ -45,7 +45,7 @@ export async function installStressSessionTabs(page: Page, input?: { draftID?: s
         }),
       )
       localStorage.setItem(
-        "opencode.global.dat:tabs",
+        "opencode.window.browser.dat:tabs",
         JSON.stringify([
           ...sessionIDs.map((sessionId) => ({
             type: "session",

packages/app/e2e/regression/cross-server-tab-close.spec.ts

@@ -14,7 +14,7 @@ test("closing the active server's last tab opens the remaining server tab", asyn
       localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
       localStorage.setItem("opencode.global.dat:server", JSON.stringify({ list: [serverB] }))
       localStorage.setItem(
-        "opencode.global.dat:tabs",
+        "opencode.window.browser.dat:tabs",
         JSON.stringify([
           { type: "session", server: "http://127.0.0.1:4096", sessionId: sessionA },
           { type: "session", server: serverB, sessionId: sessionB },
@@ -52,7 +52,7 @@ test("legacy session routes preserve an existing tab's server", async ({ page })
       localStorage.setItem("settings.v3", JSON.stringify({ general: { newLayoutDesigns: true } }))
       localStorage.setItem("opencode.global.dat:server", JSON.stringify({ list: [serverB] }))
       localStorage.setItem(
-        "opencode.global.dat:tabs",
+        "opencode.window.browser.dat:tabs",
         JSON.stringify([{ type: "session", server: serverB, sessionId: sessionB }]),
       )
     },

packages/app/e2e/regression/session-todo-dock-navigation.spec.ts

@@ -145,7 +145,7 @@ async function configurePage(page: Page) {
         }),
       )
       localStorage.setItem(
-        "opencode.global.dat:tabs",
+        "opencode.window.browser.dat:tabs",
         JSON.stringify(sessionIDs.map((sessionId) => ({ type: "session", server, dirBase64, sessionId }))),
       )
     },

packages/app/e2e/smoke/session-timeline.spec.ts

@@ -127,7 +127,7 @@ test.describe("smoke: session timeline", () => {
     await page.addInitScript(
       ({ dirBase64, sourceID, targetID }) => {
         localStorage.setItem(
-          "opencode.global.dat:tabs",
+          "opencode.window.browser.dat:tabs",
           JSON.stringify(
             [sourceID, targetID].map((sessionId) => ({
               type: "session",
@@ -253,7 +253,7 @@ test.describe("smoke: session timeline", () => {
     await page.addInitScript(
       ({ dirBase64, sourceID, targetID }) => {
         localStorage.setItem(
-          "opencode.global.dat:tabs",
+          "opencode.window.browser.dat:tabs",
           JSON.stringify(
             [sourceID, targetID].map((sessionId) => ({
               type: "session",

packages/app/src/context/platform.tsx

@@ -64,6 +64,9 @@ type PlatformBase = {
   /** Storage mechanism, defaults to localStorage */
   storage?: (name?: string) => SyncStorage | AsyncStorage
 
+  /** Stable platform window identity for window-scoped persistence */
+  windowID?: string
+
   /** Application-global desktop updater */
   updater?: UpdaterPlatform
 

packages/app/src/context/tabs.tsx

@@ -51,7 +51,7 @@ export const { use: useTabs, provider: TabsProvider } = createSimpleContext({
     const fallback = server.key
     const [store, setStore, _, ready] = persisted(
       {
-        ...Persist.global("tabs"),
+        ...Persist.window("tabs"),
         migrate: (value: unknown) => {
           if (!Array.isArray(value)) return value
           return value.map((tab) => {
@@ -62,7 +62,7 @@ export const { use: useTabs, provider: TabsProvider } = createSimpleContext({
       },
       createStore<Tab[]>([]),
     )
-    const [recent, setRecent, , recentReady] = persisted(Persist.global("tabs.recent"), createStore<RecentTab>({}))
+    const [recent, setRecent, , recentReady] = persisted(Persist.window("tabs.recent"), createStore<RecentTab>({}))
 
     const params = useParams()
     const navigate = useNavigate()

packages/app/src/utils/persist.ts

@@ -16,6 +16,7 @@ type PersistedWithReady<T> = [
 
 type PersistTarget = {
   storage?: string
+  scope?: "window"
   legacyStorageNames?: string[]
   key: string
   legacy?: string[]
@@ -24,6 +25,7 @@ type PersistTarget = {
 
 const LEGACY_STORAGE = "default.dat"
 const GLOBAL_STORAGE = "opencode.global.dat"
+const WINDOW_STORAGE = "opencode.window"
 const LOCAL_PREFIX = "opencode."
 const fallback = new Map<string, boolean>()
 
@@ -347,6 +349,11 @@ function draftStorage(draftID: string) {
   return `opencode.draft.${head}.${sum}.dat`
 }
 
+function windowStorage(windowID: string) {
+  const safe = (windowID || "browser").replace(/[^a-zA-Z0-9._-]/g, "-")
+  return `${WINDOW_STORAGE}.${safe}.dat`
+}
+
 function legacyWorkspaceStorage(dir: string) {
   const storage = workspaceStorage(pathKey(dir))
   const result = new Set<string>()
@@ -467,6 +474,8 @@ export const PersistTesting = {
   localStorageWithPrefix,
   migrateLegacy,
   normalize,
+  resolveTarget,
+  windowStorage,
   workspaceStorage,
 }
 
@@ -474,6 +483,9 @@ export const Persist = {
   global(key: string, legacy?: string[]): PersistTarget {
     return { storage: GLOBAL_STORAGE, key, legacy }
   },
+  window(key: string, legacy?: string[]): PersistTarget {
+    return { scope: "window", key, legacy }
+  },
   draft(draftID: string, key: string, legacy?: string[]): PersistTarget {
     return { storage: draftStorage(draftID), key: `draft:${key}`, legacy }
   },
@@ -503,6 +515,16 @@ export const Persist = {
   },
 }
 
+function resolveTarget(target: PersistTarget, platform: Platform): PersistTarget {
+  if (target.scope !== "window") return target
+  if (platform.platform === "desktop" && !platform.windowID) return { ...target, storage: GLOBAL_STORAGE }
+  const windowID = platform.platform === "desktop" ? (platform.windowID ?? "browser") : "browser"
+  return {
+    ...target,
+    storage: windowStorage(windowID),
+  }
+}
+
 export function removePersisted(
   target: { storage?: string; legacyStorageNames?: string[]; key: string },
   platform?: Platform,
@@ -533,7 +555,7 @@ export function persisted<T>(
   store: [Store<T>, SetStoreFunction<T>],
 ): PersistedWithReady<T> {
   const platform = usePlatform()
-  const config: PersistTarget = typeof target === "string" ? { key: target } : target
+  const config = resolveTarget(typeof target === "string" ? { key: target } : target, platform)
 
   const defaults = snapshot(store[0])
   const legacy = config.legacy ?? []