diff --git a/packages/i18n/src/locales/en/settings.yaml b/packages/i18n/src/locales/en/settings.yaml
index 16886baa6..65902b8f6 100644
--- a/packages/i18n/src/locales/en/settings.yaml
+++ b/packages/i18n/src/locales/en/settings.yaml
@@ -1641,6 +1641,13 @@ pages:
               markdown-stress:
                 title: Markdown Stress
                 description: Stress markdown parsing and rendering with heavy chat payloads
+              plugin-host:
+                actions:
+                  enable-and-load: Enable and Load
+                  disable-and-unload: Disable and Unload
+                errors:
+                  enable-and-load: 'Failed to enable and load plugin {extensionId}.'
+                  disable-and-unload: 'Failed to disable and unload plugin {extensionId}.'
               use-magic-keys:
                 title: useMagicKeys Tool
                 description: Test shortcuts
diff --git a/packages/i18n/src/locales/zh-Hans/settings.yaml b/packages/i18n/src/locales/zh-Hans/settings.yaml
index 82c7ea33b..acfaf13b4 100644
--- a/packages/i18n/src/locales/zh-Hans/settings.yaml
+++ b/packages/i18n/src/locales/zh-Hans/settings.yaml
@@ -1555,6 +1555,13 @@ pages:
               markdown-stress:
                 title: Markdown Stress
                 description: 用大量聊天负载来测试 Markdown 的解析和渲染能力
+              plugin-host:
+                actions:
+                  enable-and-load: 启用并加载
+                  disable-and-unload: 停用并卸载
+                errors:
+                  enable-and-load: '启用并加载插件 {extensionId} 失败。'
+                  disable-and-unload: '停用并卸载插件 {extensionId} 失败。'
               use-magic-keys:
                 title: useMagicKeys 工具
                 description: 测试快捷键
diff --git a/packages/stage-pages/src/pages/devtools/plugin-host.vue b/packages/stage-pages/src/pages/devtools/plugin-host.vue
index 2c03faa0c..9d153381c 100644
--- a/packages/stage-pages/src/pages/devtools/plugin-host.vue
+++ b/packages/stage-pages/src/pages/devtools/plugin-host.vue
@@ -9,9 +9,11 @@ import { Section } from '@proj-airi/stage-ui/components'
 import { usePluginHostInspectorStore } from '@proj-airi/stage-ui/stores/devtools/plugin-host-debug'
 import { Button, Callout, GhostButton, Input } from '@proj-airi/ui'
 import { computed, onMounted, ref } from 'vue'
+import { useI18n } from 'vue-i18n'
 import { toast } from 'vue-sonner'
 
 const store = usePluginHostInspectorStore()
+const { t } = useI18n()
 const filter = ref('')
 const selectedExtensionId = ref('')
 
@@ -150,6 +152,24 @@ async function unloadPlugin(plugin: PluginManifestSummary) {
   }
 }
 
+async function enableAndLoadPlugin(plugin: PluginManifestSummary) {
+  try {
+    await store.enableAndLoad({ extensionId: plugin.extensionId, path: plugin.path })
+  }
+  catch (error) {
+    toast.error(errorMessageFrom(error) ?? t('settings.pages.system.sections.section.developer.sections.section.plugin-host.errors.enable-and-load', { extensionId: plugin.extensionId }))
+  }
+}
+
+async function disableAndUnloadPlugin(plugin: PluginManifestSummary) {
+  try {
+    await store.disableAndUnload({ extensionId: plugin.extensionId, path: plugin.path })
+  }
+  catch (error) {
+    toast.error(errorMessageFrom(error) ?? t('settings.pages.system.sections.section.developer.sections.section.plugin-host.errors.disable-and-unload', { extensionId: plugin.extensionId }))
+  }
+}
+
 async function loadSelectedPlugin() {
   const extensionId = selectedExtensionId.value.trim()
   if (!extensionId) {
@@ -304,6 +324,22 @@ onMounted(async () => {
               </span>
             </div>
             <div :class="['flex', 'flex-wrap', 'items-center', 'gap-2']">
+              <Button
+                size="sm"
+                :label="t('settings.pages.system.sections.section.developer.sections.section.plugin-host.actions.enable-and-load')"
+                icon="i-solar:play-bold-duotone"
+                :disabled="store.loading || (plugin.enabled && plugin.loaded)"
+                :loading="store.loading"
+                @click="enableAndLoadPlugin(plugin)"
+              />
+              <GhostButton
+                size="sm"
+                :label="t('settings.pages.system.sections.section.developer.sections.section.plugin-host.actions.disable-and-unload')"
+                icon="i-solar:stop-bold-duotone"
+                :disabled="store.loading || (!plugin.enabled && !plugin.loaded)"
+                :loading="store.loading"
+                @click="disableAndUnloadPlugin(plugin)"
+              />
               <Button
                 size="sm"
 
diff --git a/packages/stage-ui/src/stores/devtools/plugin-host-debug.test.ts b/packages/stage-ui/src/stores/devtools/plugin-host-debug.test.ts
new file mode 100644
index 000000000..2ec7f677b
--- /dev/null
+++ b/packages/stage-ui/src/stores/devtools/plugin-host-debug.test.ts
@@ -0,0 +1,135 @@
+import type { PluginHostDebugSnapshot, PluginRegistrySnapshot } from './plugin-host-debug'
+
+import { createPinia, setActivePinia } from 'pinia'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import { usePluginHostInspectorStore } from './plugin-host-debug'
+
+function createRegistry(enabled: boolean, loaded: boolean): PluginRegistrySnapshot {
+  return {
+    root: 'extensions/v1',
+    plugins: [{
+      extensionId: 'sample-plugin',
+      entrypoints: { electron: './index.mjs' },
+      path: 'sample-plugin/extension.airi.json',
+      enabled,
+      loaded,
+      autoReload: false,
+      isNew: false,
+    }],
+  }
+}
+
+function createBridge(registry: PluginRegistrySnapshot) {
+  const snapshot: PluginHostDebugSnapshot = {
+    registry,
+    sessions: registry.plugins.filter(plugin => plugin.loaded).map(plugin => ({
+      id: 'sample-session',
+      extensionId: plugin.extensionId,
+      phase: 'ready',
+      runtime: 'electron',
+      moduleId: plugin.extensionId,
+    })),
+    kits: [],
+    modules: [],
+    capabilities: [],
+    refreshedAt: 1,
+  }
+
+  return {
+    list: vi.fn(async () => registry),
+    setEnabled: vi.fn(async () => registry),
+    setAutoReload: vi.fn(async () => registry),
+    loadEnabled: vi.fn(async () => registry),
+    load: vi.fn(async () => registry),
+    unload: vi.fn(async () => registry),
+    inspect: vi.fn(async () => snapshot),
+  }
+}
+
+describe.each([
+  { action: 'enableAndLoad' as const, runtimeAction: 'load' as const, enabled: true },
+  { action: 'disableAndUnload' as const, runtimeAction: 'unload' as const, enabled: false },
+])('$action', ({ action, runtimeAction, enabled }) => {
+  beforeEach(() => {
+    setActivePinia(createPinia())
+  })
+
+  it('saves enablement before changing runtime state and stays busy through inspection', async () => {
+    const finalRegistry = createRegistry(enabled, enabled)
+    const bridge = createBridge(finalRegistry)
+    const save = Promise.withResolvers<PluginRegistrySnapshot>()
+    const runtime = Promise.withResolvers<PluginRegistrySnapshot>()
+    const inspection = Promise.withResolvers<void>()
+    const inspect = bridge.inspect.getMockImplementation()!
+    bridge.setEnabled.mockReturnValueOnce(save.promise)
+    bridge[runtimeAction].mockReturnValueOnce(runtime.promise)
+    bridge.inspect.mockImplementationOnce(async () => {
+      await inspection.promise
+      return inspect()
+    })
+
+    const store = usePluginHostInspectorStore()
+    store.setBridge(bridge)
+    const operation = store[action]({
+      extensionId: 'sample-plugin',
+      path: 'sample-plugin/extension.airi.json',
+    })
+
+    expect(store.loading).toBe(true)
+    expect(bridge.setEnabled).toHaveBeenCalledExactlyOnceWith({
+      extensionId: 'sample-plugin',
+      path: 'sample-plugin/extension.airi.json',
+      enabled,
+    })
+    expect(bridge[runtimeAction]).not.toHaveBeenCalled()
+
+    const savedRegistry = createRegistry(enabled, !enabled)
+    save.resolve(savedRegistry)
+    await vi.waitFor(() => expect(bridge[runtimeAction]).toHaveBeenCalledExactlyOnceWith({ extensionId: 'sample-plugin' }))
+    expect(store.registry).toEqual(savedRegistry)
+    expect(store.loading).toBe(true)
+    expect(bridge.inspect).not.toHaveBeenCalled()
+
+    runtime.resolve(finalRegistry)
+    await vi.waitFor(() => expect(bridge.inspect).toHaveBeenCalledOnce())
+    expect(store.registry).toEqual(finalRegistry)
+    expect(store.loading).toBe(true)
+
+    inspection.resolve()
+    await expect(operation).resolves.toEqual(finalRegistry)
+    expect(store.sessions).toHaveLength(enabled ? 1 : 0)
+    expect(store.refreshedAt).toBe(1)
+    expect(store.loading).toBe(false)
+    expect(store.error).toBeUndefined()
+  })
+
+  it('does not change runtime state when saving enablement fails', async () => {
+    const bridge = createBridge(createRegistry(!enabled, !enabled))
+    bridge.setEnabled.mockRejectedValueOnce(new Error('Could not save enablement.'))
+    const store = usePluginHostInspectorStore()
+    store.setBridge(bridge)
+
+    await expect(store[action]({ extensionId: 'sample-plugin' })).rejects.toThrow('Could not save enablement.')
+
+    expect(bridge[runtimeAction]).not.toHaveBeenCalled()
+    expect(bridge.inspect).not.toHaveBeenCalled()
+    expect(store.error).toBe('Could not save enablement.')
+    expect(store.loading).toBe(false)
+  })
+
+  it('keeps the saved enablement visible when the runtime operation fails', async () => {
+    const savedRegistry = createRegistry(enabled, !enabled)
+    const bridge = createBridge(savedRegistry)
+    bridge[runtimeAction].mockRejectedValueOnce(new Error('Runtime operation failed.'))
+    const store = usePluginHostInspectorStore()
+    store.setBridge(bridge)
+
+    await expect(store[action]({ extensionId: 'sample-plugin' })).rejects.toThrow('Runtime operation failed.')
+
+    expect(bridge.setEnabled).toHaveBeenCalledOnce()
+    expect(store.registry).toEqual(savedRegistry)
+    expect(store.error).toBe('Runtime operation failed.')
+    expect(store.loading).toBe(false)
+  })
+})
diff --git a/packages/stage-ui/src/stores/devtools/plugin-host-debug.ts b/packages/stage-ui/src/stores/devtools/plugin-host-debug.ts
index e63cdd035..4fd25769c 100644
--- a/packages/stage-ui/src/stores/devtools/plugin-host-debug.ts
+++ b/packages/stage-ui/src/stores/devtools/plugin-host-debug.ts
@@ -206,6 +206,28 @@ export const usePluginHostInspectorStore = defineStore('devtools:plugin-host-deb
     return nextRegistry
   }
 
+  /** Keeps enablement visible if loading fails, so the user can retry loading. */
+  async function enableAndLoad(payload: { extensionId: string, path?: string }) {
+    return withBridge(async (activeBridge) => {
+      assignRegistry(await activeBridge.setEnabled({ ...payload, enabled: true }))
+      const nextRegistry = await activeBridge.load({ extensionId: payload.extensionId })
+      assignRegistry(nextRegistry)
+      assignInspection(await activeBridge.inspect())
+      return nextRegistry
+    })
+  }
+
+  /** Keeps the plugin disabled for future startup even if stopping its current session fails. */
+  async function disableAndUnload(payload: { extensionId: string, path?: string }) {
+    return withBridge(async (activeBridge) => {
+      assignRegistry(await activeBridge.setEnabled({ ...payload, enabled: false }))
+      const nextRegistry = await activeBridge.unload({ extensionId: payload.extensionId })
+      assignRegistry(nextRegistry)
+      assignInspection(await activeBridge.inspect())
+      return nextRegistry
+    })
+  }
+
   return {
     registry,
     sessions,
@@ -229,5 +251,7 @@ export const usePluginHostInspectorStore = defineStore('devtools:plugin-host-deb
     loadEnabled,
     load,
     unload,
+    enableAndLoad,
+    disableAndUnload,
   }
 })