ignore: refactoring and tests (#12460)

7 files changed, 639 insertions, 95 deletions

diff --git a/packages/app/src/context/command.test.ts b/packages/app/src/context/command.test.ts
new file mode 100644
index 000000000..2b956287c
--- /dev/null
+++ b/packages/app/src/context/command.test.ts
@@ -0,0 +1,25 @@
+import { describe, expect, test } from "bun:test"
+import { upsertCommandRegistration } from "./command"
+
+describe("upsertCommandRegistration", () => {
+  test("replaces keyed registrations", () => {
+    const one = () => [{ id: "one", title: "One" }]
+    const two = () => [{ id: "two", title: "Two" }]
+
+    const next = upsertCommandRegistration([{ key: "layout", options: one }], { key: "layout", options: two })
+
+    expect(next).toHaveLength(1)
+    expect(next[0]?.options).toBe(two)
+  })
+
+  test("keeps unkeyed registrations additive", () => {
+    const one = () => [{ id: "one", title: "One" }]
+    const two = () => [{ id: "two", title: "Two" }]
+
+    const next = upsertCommandRegistration([{ options: one }], { options: two })
+
+    expect(next).toHaveLength(2)
+    expect(next[0]?.options).toBe(two)
+    expect(next[1]?.options).toBe(one)
+  })
+})
diff --git a/packages/app/src/context/command.tsx b/packages/app/src/context/command.tsx
index 791569584..e6a16fd4b 100644
--- a/packages/app/src/context/command.tsx
+++ b/packages/app/src/context/command.tsx
@@ -64,6 +64,16 @@ export type CommandCatalogItem = {
   slash?: string
 }
 
+export type CommandRegistration = {
+  key?: string
+  options: Accessor<CommandOption[]>
+}
+
+export function upsertCommandRegistration(registrations: CommandRegistration[], entry: CommandRegistration) {
+  if (entry.key === undefined) return [entry, ...registrations]
+  return [entry, ...registrations.filter((x) => x.key !== entry.key)]
+}
+
 export function parseKeybind(config: string): Keybind[] {
   if (!config || config === "none") return []
 
@@ -166,9 +176,10 @@ export const { use: useCommand, provider: CommandProvider } = createSimpleContex
     const settings = useSettings()
     const language = useLanguage()
     const [store, setStore] = createStore({
-      registrations: [] as Accessor<CommandOption[]>[],
+      registrations: [] as CommandRegistration[],
       suspendCount: 0,
     })
+    const warnedDuplicates = new Set<string>()
 
     const [catalog, setCatalog, _, catalogReady] = persisted(
       Persist.global("command.catalog.v1"),
@@ -187,8 +198,14 @@ export const { use: useCommand, provider: CommandProvider } = createSimpleContex
       const all: CommandOption[] = []
 
       for (const reg of store.registrations) {
-        for (const opt of reg()) {
-          if (seen.has(opt.id)) continue
+        for (const opt of reg.options()) {
+          if (seen.has(opt.id)) {
+            if (import.meta.env.DEV && !warnedDuplicates.has(opt.id)) {
+              warnedDuplicates.add(opt.id)
+              console.warn(`[command] duplicate command id \"${opt.id}\" registered; keeping first entry`)
+            }
+            continue
+          }
           seen.add(opt.id)
           all.push(opt)
         }
@@ -296,14 +313,25 @@ export const { use: useCommand, provider: CommandProvider } = createSimpleContex
       document.removeEventListener("keydown", handleKeyDown)
     })
 
+    function register(cb: () => CommandOption[]): void
+    function register(key: string, cb: () => CommandOption[]): void
+    function register(key: string | (() => CommandOption[]), cb?: () => CommandOption[]) {
+      const id = typeof key === "string" ? key : undefined
+      const next = typeof key === "function" ? key : cb
+      if (!next) return
+      const options = createMemo(next)
+      const entry: CommandRegistration = {
+        key: id,
+        options,
+      }
+      setStore("registrations", (arr) => upsertCommandRegistration(arr, entry))
+      onCleanup(() => {
+        setStore("registrations", (arr) => arr.filter((x) => x !== entry))
+      })
+    }
+
     return {
-      register(cb: () => CommandOption[]) {
-        const results = createMemo(cb)
-        setStore("registrations", (arr) => [results, ...arr])
-        onCleanup(() => {
-          setStore("registrations", (arr) => arr.filter((x) => x !== results))
-        })
-      },
+      register,
       trigger(id: string, source?: "palette" | "keybind" | "slash") {
         run(id, source)
       },
diff --git a/packages/app/src/context/global-sync.test.ts b/packages/app/src/context/global-sync.test.ts
new file mode 100644
index 000000000..396b41231
--- /dev/null
+++ b/packages/app/src/context/global-sync.test.ts
@@ -0,0 +1,136 @@
+import { describe, expect, test } from "bun:test"
+import {
+  canDisposeDirectory,
+  estimateRootSessionTotal,
+  loadRootSessionsWithFallback,
+  pickDirectoriesToEvict,
+} from "./global-sync"
+
+describe("pickDirectoriesToEvict", () => {
+  test("keeps pinned stores and evicts idle stores", () => {
+    const now = 5_000
+    const picks = pickDirectoriesToEvict({
+      stores: ["a", "b", "c", "d"],
+      state: new Map([
+        ["a", { lastAccessAt: 1_000 }],
+        ["b", { lastAccessAt: 4_900 }],
+        ["c", { lastAccessAt: 4_800 }],
+        ["d", { lastAccessAt: 3_000 }],
+      ]),
+      pins: new Set(["a"]),
+      max: 2,
+      ttl: 1_500,
+      now,
+    })
+
+    expect(picks).toEqual(["d", "c"])
+  })
+})
+
+describe("loadRootSessionsWithFallback", () => {
+  test("uses limited roots query when supported", async () => {
+    const calls: Array<{ directory: string; roots: true; limit?: number }> = []
+    let fallback = 0
+
+    const result = await loadRootSessionsWithFallback({
+      directory: "dir",
+      limit: 10,
+      list: async (query) => {
+        calls.push(query)
+        return { data: [] }
+      },
+      onFallback: () => {
+        fallback += 1
+      },
+    })
+
+    expect(result.data).toEqual([])
+    expect(result.limited).toBe(true)
+    expect(calls).toEqual([{ directory: "dir", roots: true, limit: 10 }])
+    expect(fallback).toBe(0)
+  })
+
+  test("falls back to full roots query on limited-query failure", async () => {
+    const calls: Array<{ directory: string; roots: true; limit?: number }> = []
+    let fallback = 0
+
+    const result = await loadRootSessionsWithFallback({
+      directory: "dir",
+      limit: 25,
+      list: async (query) => {
+        calls.push(query)
+        if (query.limit) throw new Error("unsupported")
+        return { data: [] }
+      },
+      onFallback: () => {
+        fallback += 1
+      },
+    })
+
+    expect(result.data).toEqual([])
+    expect(result.limited).toBe(false)
+    expect(calls).toEqual([
+      { directory: "dir", roots: true, limit: 25 },
+      { directory: "dir", roots: true },
+    ])
+    expect(fallback).toBe(1)
+  })
+})
+
+describe("estimateRootSessionTotal", () => {
+  test("keeps exact total for full fetches", () => {
+    expect(estimateRootSessionTotal({ count: 42, limit: 10, limited: false })).toBe(42)
+  })
+
+  test("marks has-more for full-limit limited fetches", () => {
+    expect(estimateRootSessionTotal({ count: 10, limit: 10, limited: true })).toBe(11)
+  })
+
+  test("keeps exact total when limited fetch is under limit", () => {
+    expect(estimateRootSessionTotal({ count: 9, limit: 10, limited: true })).toBe(9)
+  })
+})
+
+describe("canDisposeDirectory", () => {
+  test("rejects pinned or inflight directories", () => {
+    expect(
+      canDisposeDirectory({
+        directory: "dir",
+        hasStore: true,
+        pinned: true,
+        booting: false,
+        loadingSessions: false,
+      }),
+    ).toBe(false)
+    expect(
+      canDisposeDirectory({
+        directory: "dir",
+        hasStore: true,
+        pinned: false,
+        booting: true,
+        loadingSessions: false,
+      }),
+    ).toBe(false)
+    expect(
+      canDisposeDirectory({
+        directory: "dir",
+        hasStore: true,
+        pinned: false,
+        booting: false,
+        loadingSessions: true,
+      }),
+    ).toBe(false)
+  })
+
+  test("accepts idle unpinned directory store", () => {
+    expect(
+      canDisposeDirectory({
+        directory: "dir",
+        hasStore: true,
+        pinned: false,
+        booting: false,
+        loadingSessions: false,
+      }),
+    ).toBe(true)
+  })
+})
diff --git a/packages/app/src/context/global-sync.tsx b/packages/app/src/context/global-sync.tsx
index 0facbdfff..0d6b5dfff 100644
--- a/packages/app/src/context/global-sync.tsx
+++ b/packages/app/src/context/global-sync.tsx
@@ -27,6 +27,7 @@ import type { InitError } from "../pages/error"
 import {
   batch,
   createContext,
+  createRoot,
   createEffect,
   untrack,
   getOwner,
@@ -131,6 +132,96 @@ function normalizeProviderList(input: ProviderListResponse): ProviderListRespons
   }
 }
 
+const MAX_DIR_STORES = 30
+const DIR_IDLE_TTL_MS = 20 * 60 * 1000
+
+type DirState = {
+  lastAccessAt: number
+}
+
+type EvictPlan = {
+  stores: string[]
+  state: Map<string, DirState>
+  pins: Set<string>
+  max: number
+  ttl: number
+  now: number
+}
+
+export function pickDirectoriesToEvict(input: EvictPlan) {
+  const overflow = Math.max(0, input.stores.length - input.max)
+  let pendingOverflow = overflow
+  const sorted = input.stores
+    .filter((dir) => !input.pins.has(dir))
+    .slice()
+    .sort((a, b) => (input.state.get(a)?.lastAccessAt ?? 0) - (input.state.get(b)?.lastAccessAt ?? 0))
+
+  const output: string[] = []
+  for (const dir of sorted) {
+    const last = input.state.get(dir)?.lastAccessAt ?? 0
+    const idle = input.now - last >= input.ttl
+    if (!idle && pendingOverflow <= 0) continue
+    output.push(dir)
+    if (pendingOverflow > 0) pendingOverflow -= 1
+  }
+  return output
+}
+
+type RootLoadArgs = {
+  directory: string
+  limit: number
+  list: (query: { directory: string; roots: true; limit?: number }) => Promise<{ data?: Session[] }>
+  onFallback: () => void
+}
+
+type RootLoadResult = {
+  data?: Session[]
+  limit: number
+  limited: boolean
+}
+
+export async function loadRootSessionsWithFallback(input: RootLoadArgs) {
+  try {
+    const result = await input.list({ directory: input.directory, roots: true, limit: input.limit })
+    return {
+      data: result.data,
+      limit: input.limit,
+      limited: true,
+    } satisfies RootLoadResult
+  } catch {
+    input.onFallback()
+    const result = await input.list({ directory: input.directory, roots: true })
+    return {
+      data: result.data,
+      limit: input.limit,
+      limited: false,
+    } satisfies RootLoadResult
+  }
+}
+
+export function estimateRootSessionTotal(input: { count: number; limit: number; limited: boolean }) {
+  if (!input.limited) return input.count
+  if (input.count < input.limit) return input.count
+  return input.count + 1
+}
+
+type DisposeCheck = {
+  directory: string
+  hasStore: boolean
+  pinned: boolean
+  booting: boolean
+  loadingSessions: boolean
+}
+
+export function canDisposeDirectory(input: DisposeCheck) {
+  if (!input.directory) return false
+  if (!input.hasStore) return false
+  if (input.pinned) return false
+  if (input.booting) return false
+  if (input.loadingSessions) return false
+  return true
+}
+
 function createGlobalSync() {
   const globalSDK = useGlobalSDK()
   const platform = usePlatform()
@@ -140,8 +231,133 @@ function createGlobalSync() {
   const vcsCache = new Map<string, VcsCache>()
   const metaCache = new Map<string, MetaCache>()
   const iconCache = new Map<string, IconCache>()
+  const lifecycle = new Map<string, DirState>()
+  const pins = new Map<string, number>()
+  const ownerPins = new WeakMap<object, Set<string>>()
+  const disposers = new Map<string, () => void>()
+  const stats = {
+    evictions: 0,
+    loadSessionsFallback: 0,
+  }
 
   const sdkCache = new Map<string, ReturnType<typeof createOpencodeClient>>()
+
+  const updateStats = () => {
+    if (!import.meta.env.DEV) return
+    ;(
+      globalThis as {
+        __OPENCODE_GLOBAL_SYNC_STATS?: {
+          activeDirectoryStores: number
+          evictions: number
+          loadSessionsFullFetchFallback: number
+        }
+      }
+    ).__OPENCODE_GLOBAL_SYNC_STATS = {
+      activeDirectoryStores: Object.keys(children).length,
+      evictions: stats.evictions,
+      loadSessionsFullFetchFallback: stats.loadSessionsFallback,
+    }
+  }
+
+  const mark = (directory: string) => {
+    if (!directory) return
+    lifecycle.set(directory, { lastAccessAt: Date.now() })
+    runEviction()
+  }
+
+  const pin = (directory: string) => {
+    if (!directory) return
+    pins.set(directory, (pins.get(directory) ?? 0) + 1)
+    mark(directory)
+  }
+
+  const unpin = (directory: string) => {
+    if (!directory) return
+    const next = (pins.get(directory) ?? 0) - 1
+    if (next > 0) {
+      pins.set(directory, next)
+      return
+    }
+    pins.delete(directory)
+    runEviction()
+  }
+
+  const pinned = (directory: string) => (pins.get(directory) ?? 0) > 0
+
+  const pinForOwner = (directory: string) => {
+    const current = getOwner()
+    if (!current) return
+    if (current === owner) return
+    const key = current as object
+    const set = ownerPins.get(key)
+    if (set?.has(directory)) return
+    if (set) set.add(directory)
+    else ownerPins.set(key, new Set([directory]))
+    pin(directory)
+    onCleanup(() => {
+      const set = ownerPins.get(key)
+      if (set) {
+        set.delete(directory)
+        if (set.size === 0) ownerPins.delete(key)
+      }
+      unpin(directory)
+    })
+  }
+
+  function disposeDirectory(directory: string) {
+    if (
+      !canDisposeDirectory({
+        directory,
+        hasStore: !!children[directory],
+        pinned: pinned(directory),
+        booting: booting.has(directory),
+        loadingSessions: sessionLoads.has(directory),
+      })
+    ) {
+      return false
+    }
+
+    queued.delete(directory)
+    sessionMeta.delete(directory)
+    sdkCache.delete(directory)
+    vcsCache.delete(directory)
+    metaCache.delete(directory)
+    iconCache.delete(directory)
+    lifecycle.delete(directory)
+
+    const dispose = disposers.get(directory)
+    if (dispose) {
+      dispose()
+      disposers.delete(directory)
+    }
+
+    delete children[directory]
+    updateStats()
+    return true
+  }
+
+  function runEviction() {
+    const stores = Object.keys(children)
+    if (stores.length === 0) return
+    const list = pickDirectoriesToEvict({
+      stores,
+      state: lifecycle,
+      pins: new Set(stores.filter(pinned)),
+      max: MAX_DIR_STORES,
+      ttl: DIR_IDLE_TTL_MS,
+      now: Date.now(),
+    })
+
+    if (list.length === 0) return
+    let changed = false
+    for (const directory of list) {
+      if (!disposeDirectory(directory)) continue
+      stats.evictions += 1
+      changed = true
+    }
+    if (changed) updateStats()
+  }
+
   const sdkFor = (directory: string) => {
     const cached = sdkCache.get(directory)
     if (cached) return cached
@@ -379,52 +595,56 @@ function createGlobalSync() {
       if (!icon) throw new Error("Failed to create persisted project icon")
       iconCache.set(directory, { store: icon[0], setStore: icon[1], ready: icon[3] })
 
-      const init = () => {
-        const child = createStore<State>({
-          project: "",
-          projectMeta: meta[0].value,
-          icon: icon[0].value,
-          provider: { all: [], connected: [], default: {} },
-          config: {},
-          path: { state: "", config: "", worktree: "", directory: "", home: "" },
-          status: "loading" as const,
-          agent: [],
-          command: [],
-          session: [],
-          sessionTotal: 0,
-          session_status: {},
-          session_diff: {},
-          todo: {},
-          permission: {},
-          question: {},
-          mcp: {},
-          lsp: [],
-          vcs: vcsStore.value,
-          limit: 5,
-          message: {},
-          part: {},
-        })
+      const init = () =>
+        createRoot((dispose) => {
+          const child = createStore<State>({
+            project: "",
+            projectMeta: meta[0].value,
+            icon: icon[0].value,
+            provider: { all: [], connected: [], default: {} },
+            config: {},
+            path: { state: "", config: "", worktree: "", directory: "", home: "" },
+            status: "loading" as const,
+            agent: [],
+            command: [],
+            session: [],
+            sessionTotal: 0,
+            session_status: {},
+            session_diff: {},
+            todo: {},
+            permission: {},
+            question: {},
+            mcp: {},
+            lsp: [],
+            vcs: vcsStore.value,
+            limit: 5,
+            message: {},
+            part: {},
+          })
 
-        children[directory] = child
+          children[directory] = child
+          disposers.set(directory, dispose)
 
-        createEffect(() => {
-          if (!vcsReady()) return
-          const cached = vcsStore.value
-          if (!cached?.branch) return
-          child[1]("vcs", (value) => value ?? cached)
-        })
+          createEffect(() => {
+            if (!vcsReady()) return
+            const cached = vcsStore.value
+            if (!cached?.branch) return
+            child[1]("vcs", (value) => value ?? cached)
+          })
 
-        createEffect(() => {
-          child[1]("projectMeta", meta[0].value)
-        })
+          createEffect(() => {
+            child[1]("projectMeta", meta[0].value)
+          })
 
-        createEffect(() => {
-          child[1]("icon", icon[0].value)
+          createEffect(() => {
+            child[1]("icon", icon[0].value)
+          })
         })
-      }
 
       runWithOwner(owner, init)
+      updateStats()
     }
+    mark(directory)
     const childStore = children[directory]
     if (!childStore) throw new Error("Failed to create store")
     return childStore
@@ -432,6 +652,7 @@ function createGlobalSync() {
 
   function child(directory: string, options: ChildOptions = {}) {
     const childStore = ensureChild(directory)
+    pinForOwner(directory)
     const shouldBootstrap = options.bootstrap ?? true
     if (shouldBootstrap && childStore[0].status === "loading") {
       void bootstrapInstance(directory)
@@ -443,6 +664,7 @@ function createGlobalSync() {
     const pending = sessionLoads.get(directory)
     if (pending) return pending
 
+    pin(directory)
     const [store, setStore] = child(directory, { bootstrap: false })
     const meta = sessionMeta.get(directory)
     if (meta && meta.limit >= store.limit) {
@@ -450,11 +672,20 @@ function createGlobalSync() {
       if (next.length !== store.session.length) {
         setStore("session", reconcile(next, { key: "id" }))
       }
+      unpin(directory)
       return
     }
 
-    const promise = globalSDK.client.session
-      .list({ directory, roots: true })
+    const limit = Math.max(store.limit + sessionRecentLimit, sessionRecentLimit)
+    const promise = loadRootSessionsWithFallback({
+      directory,
+      limit,
+      list: (query) => globalSDK.client.session.list(query),
+      onFallback: () => {
+        stats.loadSessionsFallback += 1
+        updateStats()
+      },
+    })
       .then((x) => {
         const nonArchived = (x.data ?? [])
           .filter((s) => !!s?.id)
@@ -468,8 +699,13 @@ function createGlobalSync() {
         const children = store.session.filter((s) => !!s.parentID)
         const sessions = trimSessions([...nonArchived, ...children], { limit, permission: store.permission })
 
-        // Store total session count (used for "load more" pagination)
-        setStore("sessionTotal", nonArchived.length)
+        // Store root session total for "load more" pagination.
+        // For limited root queries, preserve has-more behavior by treating
+        // full-limit responses as "potentially more".
+        setStore(
+          "sessionTotal",
+          estimateRootSessionTotal({ count: nonArchived.length, limit: x.limit, limited: x.limited }),
+        )
         setStore("session", reconcile(sessions, { key: "id" }))
         sessionMeta.set(directory, { limit })
       })
@@ -482,6 +718,7 @@ function createGlobalSync() {
     sessionLoads.set(directory, promise)
     promise.finally(() => {
       sessionLoads.delete(directory)
+      unpin(directory)
     })
     return promise
   }
@@ -491,6 +728,7 @@ function createGlobalSync() {
     const pending = booting.get(directory)
     if (pending) return pending
 
+    pin(directory)
     const promise = (async () => {
       const [store, setStore] = ensureChild(directory)
       const cache = vcsCache.get(directory)
@@ -605,6 +843,7 @@ function createGlobalSync() {
     booting.set(directory, promise)
     promise.finally(() => {
       booting.delete(directory)
+      unpin(directory)
     })
     return promise
   }
@@ -670,6 +909,7 @@ function createGlobalSync() {
 
     const existing = children[directory]
     if (!existing) return
+    mark(directory)
 
     const [store, setStore] = existing
 
@@ -955,6 +1195,11 @@ function createGlobalSync() {
     if (!timer) return
     clearTimeout(timer)
   })
+  onCleanup(() => {
+    for (const directory of Object.keys(children)) {
+      disposeDirectory(directory)
+    }
+  })
 
   async function bootstrap() {
     const health = await globalSDK.client.global
diff --git a/packages/app/src/context/notification-index.ts b/packages/app/src/context/notification-index.ts
new file mode 100644
index 000000000..0b316e7ec
--- /dev/null
+++ b/packages/app/src/context/notification-index.ts
@@ -0,0 +1,66 @@
+type NotificationIndexItem = {
+  directory?: string
+  session?: string
+  viewed: boolean
+  type: string
+}
+
+export function buildNotificationIndex<T extends NotificationIndexItem>(list: T[]) {
+  const sessionAll = new Map<string, T[]>()
+  const sessionUnseen = new Map<string, T[]>()
+  const sessionUnseenCount = new Map<string, number>()
+  const sessionUnseenHasError = new Map<string, boolean>()
+  const projectAll = new Map<string, T[]>()
+  const projectUnseen = new Map<string, T[]>()
+  const projectUnseenCount = new Map<string, number>()
+  const projectUnseenHasError = new Map<string, boolean>()
+
+  for (const notification of list) {
+    const session = notification.session
+    if (session) {
+      const all = sessionAll.get(session)
+      if (all) all.push(notification)
+      else sessionAll.set(session, [notification])
+
+      if (!notification.viewed) {
+        const unseen = sessionUnseen.get(session)
+        if (unseen) unseen.push(notification)
+        else sessionUnseen.set(session, [notification])
+
+        sessionUnseenCount.set(session, (sessionUnseenCount.get(session) ?? 0) + 1)
+        if (notification.type === "error") sessionUnseenHasError.set(session, true)
+      }
+    }
+
+    const directory = notification.directory
+    if (directory) {
+      const all = projectAll.get(directory)
+      if (all) all.push(notification)
+      else projectAll.set(directory, [notification])
+
+      if (!notification.viewed) {
+        const unseen = projectUnseen.get(directory)
+        if (unseen) unseen.push(notification)
+        else projectUnseen.set(directory, [notification])
+
+        projectUnseenCount.set(directory, (projectUnseenCount.get(directory) ?? 0) + 1)
+        if (notification.type === "error") projectUnseenHasError.set(directory, true)
+      }
+    }
+  }
+
+  return {
+    session: {
+      all: sessionAll,
+      unseen: sessionUnseen,
+      unseenCount: sessionUnseenCount,
+      unseenHasError: sessionUnseenHasError,
+    },
+    project: {
+      all: projectAll,
+      unseen: projectUnseen,
+      unseenCount: projectUnseenCount,
+      unseenHasError: projectUnseenHasError,
+    },
+  }
+}
diff --git a/packages/app/src/context/notification.test.ts b/packages/app/src/context/notification.test.ts
new file mode 100644
index 000000000..44bacb704
--- /dev/null
+++ b/packages/app/src/context/notification.test.ts
@@ -0,0 +1,73 @@
+import { describe, expect, test } from "bun:test"
+import { buildNotificationIndex } from "./notification-index"
+
+type Notification = {
+  type: "turn-complete" | "error"
+  session: string
+  directory: string
+  viewed: boolean
+  time: number
+}
+
+const turn = (session: string, directory: string, viewed = false): Notification => ({
+  type: "turn-complete",
+  session,
+  directory,
+  viewed,
+  time: 1,
+})
+
+const error = (session: string, directory: string, viewed = false): Notification => ({
+  type: "error",
+  session,
+  directory,
+  viewed,
+  time: 1,
+})
+
+describe("buildNotificationIndex", () => {
+  test("builds unseen counts and unseen error flags", () => {
+    const list = [
+      turn("s1", "d1", false),
+      error("s1", "d1", false),
+      turn("s1", "d1", true),
+      turn("s2", "d1", false),
+      error("s3", "d2", true),
+    ]
+
+    const index = buildNotificationIndex(list)
+
+    expect(index.session.all.get("s1")?.length).toBe(3)
+    expect(index.session.unseen.get("s1")?.length).toBe(2)
+    expect(index.session.unseenCount.get("s1")).toBe(2)
+    expect(index.session.unseenHasError.get("s1")).toBe(true)
+
+    expect(index.session.unseenCount.get("s2")).toBe(1)
+    expect(index.session.unseenHasError.get("s2") ?? false).toBe(false)
+    expect(index.session.unseenCount.get("s3") ?? 0).toBe(0)
+    expect(index.session.unseenHasError.get("s3") ?? false).toBe(false)
+
+    expect(index.project.unseenCount.get("d1")).toBe(3)
+    expect(index.project.unseenHasError.get("d1")).toBe(true)
+    expect(index.project.unseenCount.get("d2") ?? 0).toBe(0)
+    expect(index.project.unseenHasError.get("d2") ?? false).toBe(false)
+  })
+
+  test("updates selectors after viewed transitions", () => {
+    const list = [turn("s1", "d1", false), error("s1", "d1", false), turn("s2", "d1", false)]
+    const next = list.map((item) => (item.session === "s1" ? { ...item, viewed: true } : item))
+
+    const before = buildNotificationIndex(list)
+    const after = buildNotificationIndex(next)
+
+    expect(before.session.unseenCount.get("s1")).toBe(2)
+    expect(before.session.unseenHasError.get("s1")).toBe(true)
+    expect(before.project.unseenCount.get("d1")).toBe(3)
+    expect(before.project.unseenHasError.get("d1")).toBe(true)
+
+    expect(after.session.unseenCount.get("s1") ?? 0).toBe(0)
+    expect(after.session.unseenHasError.get("s1") ?? false).toBe(false)
+    expect(after.project.unseenCount.get("d1")).toBe(1)
+    expect(after.project.unseenHasError.get("d1") ?? false).toBe(false)
+  })
+})
diff --git a/packages/app/src/context/notification.tsx b/packages/app/src/context/notification.tsx
index 6c110cae1..b876bd862 100644
--- a/packages/app/src/context/notification.tsx
+++ b/packages/app/src/context/notification.tsx
@@ -13,6 +13,7 @@ import { decode64 } from "@/utils/base64"
 import { EventSessionError } from "@opencode-ai/sdk/v2"
 import { Persist, persisted } from "@/utils/persist"
 import { playSound, soundSrc } from "@/utils/sound"
+import { buildNotificationIndex } from "./notification-index"
 
 type NotificationBase = {
   directory?: string
@@ -81,49 +82,7 @@ export const { use: useNotification, provider: NotificationProvider } = createSi
       setStore("list", (list) => pruneNotifications([...list, notification]))
     }
 
-    const index = createMemo(() => {
-      const sessionAll = new Map<string, Notification[]>()
-      const sessionUnseen = new Map<string, Notification[]>()
-      const projectAll = new Map<string, Notification[]>()
-      const projectUnseen = new Map<string, Notification[]>()
-
-      for (const notification of store.list) {
-        const session = notification.session
-        if (session) {
-          const list = sessionAll.get(session)
-          if (list) list.push(notification)
-          else sessionAll.set(session, [notification])
-          if (!notification.viewed) {
-            const unseen = sessionUnseen.get(session)
-            if (unseen) unseen.push(notification)
-            else sessionUnseen.set(session, [notification])
-          }
-        }
-
-        const directory = notification.directory
-        if (directory) {
-          const list = projectAll.get(directory)
-          if (list) list.push(notification)
-          else projectAll.set(directory, [notification])
-          if (!notification.viewed) {
-            const unseen = projectUnseen.get(directory)
-            if (unseen) unseen.push(notification)
-            else projectUnseen.set(directory, [notification])
-          }
-        }
-      }
-
-      return {
-        session: {
-          all: sessionAll,
-          unseen: sessionUnseen,
-        },
-        project: {
-          all: projectAll,
-          unseen: projectUnseen,
-        },
-      }
-    })
+    const index = createMemo(() => buildNotificationIndex(store.list))
 
     const unsub = globalSDK.event.listen((e) => {
       const event = e.details
@@ -208,6 +167,12 @@ export const { use: useNotification, provider: NotificationProvider } = createSi
         unseen(session: string) {
           return index().session.unseen.get(session) ?? empty
         },
+        unseenCount(session: string) {
+          return index().session.unseenCount.get(session) ?? 0
+        },
+        unseenHasError(session: string) {
+          return index().session.unseenHasError.get(session) ?? false
+        },
         markViewed(session: string) {
           setStore("list", (n) => n.session === session, "viewed", true)
         },
@@ -219,6 +184,12 @@ export const { use: useNotification, provider: NotificationProvider } = createSi
         unseen(directory: string) {
           return index().project.unseen.get(directory) ?? empty
         },
+        unseenCount(directory: string) {
+          return index().project.unseenCount.get(directory) ?? 0
+        },
+        unseenHasError(directory: string) {
+          return index().project.unseenHasError.get(directory) ?? false
+        },
         markViewed(directory: string) {
           setStore("list", (n) => n.directory === directory, "viewed", true)
         },