diff --git a/src/client/apes/locales.ts b/src/client/apes/locales.ts
index ba2f46d..6616ff0 100644
--- a/src/client/apes/locales.ts
+++ b/src/client/apes/locales.ts
@@ -33,6 +33,8 @@ export const apesZh = {
   apesProfileNoCwd: '未知',
   apesProfileRunning: '运行中',
   apesProfileIdle: '空闲',
+  /** Guide-page capsule description (official right sidebar's entry list). */
+  apesProfileGuideDesc: '当前会话的身份与工作目录',
   // Apps view
   apesAppsNoFeed: '当前 DSH 版本未提供工作区应用数据源',
   apesAppsWorkspace: '工作区',
@@ -54,6 +56,7 @@ export const apesEn: Record<keyof typeof apesZh, string> = {
   apesProfileNoCwd: 'unknown',
   apesProfileRunning: 'running',
   apesProfileIdle: 'idle',
+  apesProfileGuideDesc: "This session's identity and working directory",
   apesAppsNoFeed: 'This DSH version exposes no workspace-app feed',
   apesAppsWorkspace: 'Workspace',
 }
diff --git a/src/client/apes/native-tabs.tsx b/src/client/apes/native-tabs.tsx
new file mode 100644
index 0000000..df2992b
--- /dev/null
+++ b/src/client/apes/native-tabs.tsx
@@ -0,0 +1,187 @@
+/**
+ * Native right-sidebar bridge (Phase A spike) — registers apes:* tabs as
+ * OFFICIAL `@deepseek-ai/dsh-client-ui-sidebar-right` tab types through the
+ * public two-stage protocol its README documents:
+ *
+ *   1. TYPE — `ctx.sidebarRightTabs.register({ id, kind, priority, title, guide? })`
+ *      a static declaration with no runtime hooks; the `id` is the type's
+ *      identity in the tab system AND the key its body registers under.
+ *   2. BODY — `ctx.slots.inject('sidebar.right.pane.tab', () => ctx.slots.register(
+ *      { name: 'sidebar.right.pane.tab', key: <id> }, Body))`
+ *      the keyed seat dispatches a tab's body to the type registered for its
+ *      `kind`; the body reads `useTabInfo()` (injected by the seat) for
+ *      `{ sidebar, panel, tab }`.
+ *
+ * ACTIVATION ORDER — `sidebarRightTabs` is installed by that package's own
+ * `apply()` through `ctx.reflect.provide(...)`, so it may not exist yet when
+ * our plugin activates. We therefore reach it through `ctx.inject(['sidebarRightTabs'], …)`
+ * (the same pattern intercept.tsx uses for the async `remote.session`
+ * namespace): the callback runs when the service exists and re-runs after a
+ * remount, so the bridge is order-independent and HMR-safe. Deployments
+ * without the official right sidebar simply never see the callback — the
+ * fork's own shell stays the only surface, which is also what the render-time
+ * `guide`/type registration tolerates.
+ *
+ * SCOPE — the spike registers exactly ONE tab (`apes:profile` / 画像) to prove
+ * the path end-to-end before deciding on the full nine-tab migration. The
+ * existing `service.registerTab` route in `tabs.tsx` is deliberately left
+ * untouched, so both surfaces coexist during the spike and the whole spike
+ * reverts by deleting this file plus its one call site.
+ *
+ * Side effect worth knowing (inherent to the official default-page rule): the
+ * dock's default page depends on how many guide entries are registered —
+ * exactly one auto-opens it, zero or many open the guide page. Our guide entry
+ * therefore turns a fresh-empty dock from "Files" into the guide page listing
+ * every entry capsule.
+ */
+import { useMemo, type ReactNode } from 'react'
+import { IconUserOutline16 } from './icons.tsx'
+import { t } from './locales.ts'
+import { ApesProfileView } from './tabs.tsx'
+import type { TabComponentProps } from '../service.ts'
+
+/** The apes type's identity in the official tab system. Package-scoped so it
+ *  can never collide with a native or third-party registration. */
+const PROFILE_ID = 'dsh-apes-sidebar/profile'
+/** The kind the panel opens the tab with (`openTab(kind)`); `apes:` prefixed so
+ *  it reads as ours in the official registry. */
+const PROFILE_KIND = 'apes:profile'
+
+/** The official registry's definition shape (the subset we use). */
+interface NativeTabDefinition {
+  id: string
+  kind: string
+  priority?: 'builtin' | 'extension' | 'fallback'
+  title: () => string
+  guide?: Array<{
+    order: number
+    title: () => string
+    description?: () => string
+    icon?: (props: { size?: number; className?: string }) => ReactNode
+  }>
+}
+
+/** The registry service face the official package provides. */
+interface NativeTabRegistry {
+  register(definition: NativeTabDefinition): () => void
+}
+
+/** The slots service face (structural subset of `@deepseek-ai/dsh-client-ui-slots`). */
+interface NativeSlots {
+  inject(key: string, callback: () => () => void): () => void
+  register(options: {
+    name: string
+    key?: string
+    locale?: string
+    inject?: (...args: unknown[]) => Record<string, unknown>
+  }, component: (props: Record<string, unknown>) => ReactNode): () => void
+}
+
+/** What the seat hands a tab body in addition to our own injected props. */
+interface NativeTabBodyProps {
+  useTabInfo?: () => unknown
+  sessionId?: string
+  ctx: TabComponentProps['ctx']
+}
+
+/** The tab info the seat's `useTabInfo()` hook returns (the subset we read). */
+interface NativeTabInfo {
+  sidebar?: { expanded?: boolean; fullscreen?: boolean }
+  panel?: { id?: string }
+  tab?: { id?: string; title?: string; visible?: boolean }
+}
+
+/** Fallback reader for an absent seat hook (never in production — the seat
+ *  always injects `tabInfo`; this keeps the body hook-safe either way, since
+ *  the fallback calls no hooks of its own). */
+function fallbackTabInfo(): NativeTabInfo {
+  return { sidebar: { expanded: true }, panel: { id: '' }, tab: { visible: true } }
+}
+
+/**
+ * The official surface's body for 画像: the SAME `ApesProfileView` the fork
+ * already ships, re-bound to the official tab scope. The view reads only
+ * `props.ctx` (the sessions feed) and `props.scope` (sessionId / cwd), so the
+ * shell-only props are filled with placeholders — which is the spike's whole
+ * point: the panel content is shared, never duplicated.
+ */
+function ProfileNativeBody(props: NativeTabBodyProps): ReactNode {
+  const useInfo = props.useTabInfo ?? fallbackTabInfo
+  const info = useInfo() as NativeTabInfo | undefined
+  const sessionId = props.sessionId
+    ?? props.ctx.sessions.list.getSnapshot().current
+    ?? ''
+  const scope = useMemo(() => ({ sessionId }), [sessionId])
+  const viewProps = {
+    ctx: props.ctx,
+    scope,
+    visible: info?.tab?.visible ?? true,
+    store: undefined,
+    tab: {
+      id: info?.tab?.id ?? PROFILE_ID,
+      type: PROFILE_KIND,
+      title: info?.tab?.title ?? t('apesProfileTitle'),
+    },
+  } as unknown as TabComponentProps
+  return <ApesProfileView {...viewProps} />
+}
+
+/**
+ * Register the apes:profile tab as an official right-sidebar tab type.
+ * @param ctx — the client context whose `inject` waits for the registry service.
+ * @returns a disposer that disposes the inject fiber (which unwinds both stages).
+ */
+export function registerApesNativeTabs(ctx: unknown): () => void {
+  const anyCtx = ctx as {
+    inject?: (deps: string[], callback: (fctx: unknown) => void) => { dispose(): void }
+  }
+  if (typeof anyCtx.inject !== 'function') return () => {}
+  const fiber = anyCtx.inject(['sidebarRightTabs'], (fctx: unknown) => {
+    const inner = fctx as {
+      get?: (name: string) => unknown
+      slots?: NativeSlots
+      effect?: (callback: () => () => void, label?: string) => unknown
+    }
+    const registry = inner.get?.('sidebarRightTabs') as NativeTabRegistry | undefined
+    const slots = inner.slots
+    if (registry === undefined || slots === undefined || typeof inner.effect !== 'function') return
+    inner.effect(() => {
+      const disposers: Array<() => void> = []
+      try {
+        // Stage 1 — the type. A page type: it recognizes no resource address
+        // and is opened by kind; `extension` is the band for types contributed
+        // from outside the product (highest rank, so it can also take over a
+        // builtin of the same kind).
+        disposers.push(registry.register({
+          id: PROFILE_ID,
+          kind: PROFILE_KIND,
+          priority: 'extension',
+          title: () => t('apesProfileTitle'),
+          guide: [{
+            order: 70,
+            title: () => t('apesProfileTitle'),
+            description: () => t('apesProfileGuideDesc'),
+            icon: IconUserOutline16,
+          }],
+        }))
+        // Stage 2 — the body, dispatched through the keyed seat. `inject`
+        // hands the body the client context the view reads its feed from.
+        disposers.push(slots.inject('sidebar.right.pane.tab', () => slots.register({
+          name: 'sidebar.right.pane.tab',
+          key: PROFILE_ID,
+          inject: () => ({ ctx }),
+        }, ProfileNativeBody as unknown as (props: Record<string, unknown>) => ReactNode)))
+      } catch (error) {
+        // A half-registered bridge must never take the fork's own sidebar
+        // down: unwind what landed and let the own-shell surface carry on.
+        console.error('[dsh-apes-sidebar] native right-sidebar registration failed:', error)
+      }
+      return () => {
+        for (const dispose of disposers.reverse()) {
+          try { dispose() } catch { /* already disposed */ }
+        }
+      }
+    }, 'dsh-apes-sidebar: apes native tab (profile)')
+  })
+  return () => { void fiber.dispose() }
+}
diff --git a/src/client/apes/tabs.tsx b/src/client/apes/tabs.tsx
index 2eb292b..4c10c80 100644
--- a/src/client/apes/tabs.tsx
+++ b/src/client/apes/tabs.tsx
@@ -164,7 +164,7 @@ function ApesAgentsView(props: TabComponentProps) {
 }
 
 /** apes:profile — the current session's identity (title, cwd, running state). */
-function ApesProfileView(props: TabComponentProps) {
+export function ApesProfileView(props: TabComponentProps) {
   const list = useSessionList(props.ctx)
   const current = list.current
   const summary = current === undefined ? undefined : list.byId[current]
diff --git a/src/client/index.tsx b/src/client/index.tsx
index 1f19a1e..6b16ca4 100644
--- a/src/client/index.tsx
+++ b/src/client/index.tsx
@@ -16,6 +16,7 @@ import { createBetterSidebarService, matchUrlTarget } from './service.ts'
 import { revalidateChunksOnReactivate, setChunkModuleSystem } from './chunk-loader.ts'
 import { registerBuiltins } from './builtins/index.ts'
 import { registerApesTabs, APES_LOCALE_NS, apesZh, apesEn, attachApesLocale } from './apes/index.ts'
+import { registerApesNativeTabs } from './apes/native-tabs.tsx'
 import { Sidebar } from './Sidebar.tsx'
 import { RenderBoundary } from './RenderBoundary.tsx'
 import { registerOpenPathInterception, registerTurnTailInterception } from './intercept.tsx'
@@ -180,6 +181,16 @@ export function apply(ctx: Context): void {
     () => registerApesTabs(ctx, service),
     'dsh-apes-sidebar: register apes tabs',
   )
+  // Phase A spike: also publish apes:profile as an OFFICIAL right-sidebar tab
+  // type (ctx.sidebarRightTabs + the keyed `sidebar.right.pane.tab` seat), so
+  // the tab renders inside DSH's own panel instead of only in the fork's
+  // shell. Both surfaces coexist during the spike; the disposer reverses the
+  // two-stage registration on fiber disposal (HMR-safe). A throw is caught
+  // inside the bridge and never reaches this effect.
+  ctx.effect(
+    () => registerApesNativeTabs(ctx),
+    'dsh-apes-sidebar: apes native right-sidebar tabs',
+  )
   // A failure anywhere in the client lifecycle must never take the app down
   // silently: log with the plugin prefix and pin a visible diagnostic strip
   // to the page so a blank panel is never the only symptom.
diff --git a/tests/native-tabs.spec.ts b/tests/native-tabs.spec.ts
new file mode 100644
index 0000000..07309b9
--- /dev/null
+++ b/tests/native-tabs.spec.ts
@@ -0,0 +1,156 @@
+/**
+ * Native right-sidebar bridge tests (Phase A spike).
+ *
+ * `registerApesNativeTabs` publishes apes:profile as an OFFICIAL
+ * `@deepseek-ai/dsh-client-ui-sidebar-right` tab type over the public
+ * two-stage protocol: the type declaration on `ctx.sidebarRightTabs`, then the
+ * keyed body on the `sidebar.right.pane.tab` seat. The bridge reaches the
+ * registry through `ctx.inject(['sidebarRightTabs'], …)` so activation order
+ * cannot strand it, and a deployment without the official sidebar must stay a
+ * silent no-op instead of breaking the fork's own shell.
+ *
+ * The spec drives that contract with a fake cordis context (a recording
+ * `inject` + `effect`), so it pins: the dependency name, the definition's
+ * identity/band/guide entry, the body's seat key, the disposer's unwind, and
+ * both no-op paths. No DOM and no real DSH host — same node environment as
+ * apes-tabs.spec.ts.
+ */
+import { describe, expect, it, vi } from 'vitest'
+// Browser globals before the client graph loads (mirror of apes-tabs.spec.ts).
+import './browser-globals.ts'
+
+import { registerApesNativeTabs } from '../src/client/apes/native-tabs.tsx'
+
+/** One recorded type declaration. */
+interface RecordedDefinition {
+  id: string
+  kind: string
+  priority?: string
+  title: () => string
+  guide?: Array<{ order: number; title: () => string; description?: () => string; icon?: unknown }>
+}
+
+/** One recorded body registration. */
+interface RecordedBody {
+  options: { name: string; key?: string; inject?: (...args: unknown[]) => Record<string, unknown> }
+  component: unknown
+}
+
+/** Build a fake client context plus the registries it hands the bridge. */
+function harness(options: { service?: boolean } = {}) {
+  const definitions: RecordedDefinition[] = []
+  const bodies: RecordedBody[] = []
+  let typeUnwound = false
+  let bodyUnwound = false
+
+  const registry = {
+    register(definition: RecordedDefinition) {
+      definitions.push(definition)
+      return () => { if (!typeUnwound) typeUnwound = true }
+    },
+  }
+  const slots = {
+    inject(key: string, callback: () => () => void) {
+      // The seat exists: run the declaration callback like the real registry.
+      expect(key).toBe('sidebar.right.pane.tab')
+      return callback()
+    },
+    register(registration: RecordedBody['options'], component: unknown) {
+      bodies.push({ options: registration, component })
+      return () => { if (!bodyUnwound) bodyUnwound = true }
+    },
+  }
+  const effects: Array<() => void> = []
+  const fctx = {
+    get: (name: string) => (options.service === false ? undefined : name === 'sidebarRightTabs' ? registry : undefined),
+    slots,
+    effect: (callback: () => () => void) => { effects.push(callback()) },
+  }
+  const inject = vi.fn((deps: string[], callback: (inner: unknown) => void) => {
+    expect(deps).toEqual(['sidebarRightTabs'])
+    callback(fctx)
+    return { dispose: () => { for (const dispose of effects) dispose() } }
+  })
+  return {
+    ctx: { inject },
+    inject,
+    definitions,
+    bodies,
+    get typeUnwound() { return typeUnwound },
+    get bodyUnwound() { return bodyUnwound },
+  }
+}
+
+describe('apes native right-sidebar bridge (spike)', () => {
+  it('waits on ctx.inject for the official registry service', () => {
+    const h = harness()
+    const dispose = registerApesNativeTabs(h.ctx)
+    expect(h.inject).toHaveBeenCalledTimes(1)
+    expect(h.inject.mock.calls[0]![0]).toEqual(['sidebarRightTabs'])
+    dispose()
+  })
+
+  it('registers the profile type in the extension band with a guide entry', () => {
+    const h = harness()
+    const dispose = registerApesNativeTabs(h.ctx)
+    try {
+      expect(h.definitions).toHaveLength(1)
+      const def = h.definitions[0]!
+      expect(def.id).toBe('dsh-apes-sidebar/profile')
+      expect(def.kind).toBe('apes:profile')
+      // `extension` is the band for types contributed from outside the product.
+      expect(def.priority).toBe('extension')
+      // The title is read fresh (locale switches must follow).
+      expect(def.title()).toBe('画像')
+      expect(def.guide).toHaveLength(1)
+      const entry = def.guide![0]!
+      expect(entry.order).toBe(70)
+      expect(entry.title()).toBe('画像')
+      expect(typeof entry.description?.()).toBe('string')
+      expect(entry.icon).toBeDefined()
+    } finally {
+      dispose()
+    }
+  })
+
+  it('registers the body under the type id on the keyed seat', () => {
+    const h = harness()
+    const dispose = registerApesNativeTabs(h.ctx)
+    try {
+      expect(h.bodies).toHaveLength(1)
+      const body = h.bodies[0]!
+      expect(body.options.name).toBe('sidebar.right.pane.tab')
+      // The seat key MUST equal the registered id — that is how the panel
+      // dispatches a tab body to our type.
+      expect(body.options.key).toBe(h.definitions[0]!.id)
+      expect(body.component).toBeDefined()
+      // The body's injected props carry the client context the view reads.
+      expect(body.options.inject?.()).toEqual({ ctx: h.ctx })
+    } finally {
+      dispose()
+    }
+  })
+
+  it('the disposer unwinds both stages (HMR-safe)', () => {
+    const h = harness()
+    const dispose = registerApesNativeTabs(h.ctx)
+    expect(h.definitions).toHaveLength(1)
+    expect(h.bodies).toHaveLength(1)
+    dispose()
+    expect(h.typeUnwound).toBe(true)
+    expect(h.bodyUnwound).toBe(true)
+  })
+
+  it('is a silent no-op when the official registry service never arrives', () => {
+    const h = harness({ service: false })
+    const dispose = registerApesNativeTabs(h.ctx)
+    expect(h.inject).toHaveBeenCalledTimes(1)
+    expect(h.definitions).toHaveLength(0)
+    expect(h.bodies).toHaveLength(0)
+    expect(() => dispose()).not.toThrow()
+  })
+
+  it('is a no-op for a context without inject (non-cordis harness)', () => {
+    expect(() => registerApesNativeTabs({} as never)()).not.toThrow()
+  })
+})