diff --git a/apps/cli/src/ai/agent-stream-runner.ts b/apps/cli/src/ai/agent-stream-runner.ts
index 9852303e..eb30eed6 100644
--- a/apps/cli/src/ai/agent-stream-runner.ts
+++ b/apps/cli/src/ai/agent-stream-runner.ts
@@ -86,7 +86,6 @@ export function createCliRunAgentStream(
     crossChatAnalysisService?: CrossChatAnalysisService
     sessionAdapter?: SessionRuntimeAdapter
     memoryService?: AIMemoryService
-    getAllowProactiveMemory?: () => boolean
   } = {}
 ): (params: AgentStreamRequest, onEvent: (chunk: AgentStreamChunk) => void, abortSignal: AbortSignal) => Promise<void> {
   const aiDataDir = getAiDir(dbManager)
@@ -161,7 +160,6 @@ export function createCliRunAgentStream(
         maxToolResultTokens: resolveCrossChatToolResultTokenBudget(contextWindow),
         memoryService: options.memoryService,
         aiChatId,
-        allowProactiveMemory: options.getAllowProactiveMemory?.() ?? true,
       })
       await runCrossChatAgent({
         userMessage,
diff --git a/apps/cli/src/ai/cross-chat-tool-adapter.ts b/apps/cli/src/ai/cross-chat-tool-adapter.ts
index 37a3e591..1529e385 100644
--- a/apps/cli/src/ai/cross-chat-tool-adapter.ts
+++ b/apps/cli/src/ai/cross-chat-tool-adapter.ts
@@ -23,7 +23,6 @@ export function createCliCrossChatTools(options: {
   maxToolResultTokens: number
   memoryService: AIMemoryService
   aiChatId: string
-  allowProactiveMemory: boolean
 }): AgentTool<any, any>[] {
   const context: Omit<CrossChatToolExecutionContext, 'abortSignal' | 'reportProgress'> = {
     locale: options.locale,
@@ -31,7 +30,6 @@ export function createCliCrossChatTools(options: {
     analysisService: options.analysisService,
     memoryService: options.memoryService,
     aiChatId: options.aiChatId,
-    allowProactiveMemory: options.allowProactiveMemory,
     maxToolResultTokens: options.maxToolResultTokens,
     countTokens,
     preprocessMessagesBySession: (sessionId, messages) =>
diff --git a/apps/cli/src/http/index.ts b/apps/cli/src/http/index.ts
index d38b0dd1..2f1d8a52 100644
--- a/apps/cli/src/http/index.ts
+++ b/apps/cli/src/http/index.ts
@@ -233,7 +233,6 @@ export async function startHttpServer(options?: HttpServerOptions): Promise<{
         crossChatAnalysisService,
         sessionAdapter,
         memoryService: aiMemoryService,
-        getAllowProactiveMemory: () => preferencesManager.load().aiGlobalSettings.allowProactiveMemory,
       }),
     },
   })
diff --git a/apps/desktop/main/ai/agent-stream-runner.ts b/apps/desktop/main/ai/agent-stream-runner.ts
index 4e48a481..f908aecf 100644
--- a/apps/desktop/main/ai/agent-stream-runner.ts
+++ b/apps/desktop/main/ai/agent-stream-runner.ts
@@ -79,7 +79,6 @@ export function createElectronRunAgentStream(
     analysisService: CrossChatAnalysisService
     sessionAdapter: SessionRuntimeAdapter
     memoryService: AIMemoryService
-    getAllowProactiveMemory: () => boolean
   }
 ): (
   params: AgentStreamRequest,
@@ -156,7 +155,6 @@ export function createElectronRunAgentStream(
         maxToolResultTokens: resolveCrossChatToolResultTokenBudget(resolvedContextWindow),
         memoryService: crossChatOptions.memoryService,
         aiChatId,
-        allowProactiveMemory: crossChatOptions.getAllowProactiveMemory(),
       })
       await runCrossChatAgent({
         userMessage,
diff --git a/apps/desktop/main/ai/cross-chat-tool-adapter.ts b/apps/desktop/main/ai/cross-chat-tool-adapter.ts
index 3bc7a82e..97f76114 100644
--- a/apps/desktop/main/ai/cross-chat-tool-adapter.ts
+++ b/apps/desktop/main/ai/cross-chat-tool-adapter.ts
@@ -23,7 +23,6 @@ export function createElectronCrossChatTools(options: {
   maxToolResultTokens: number
   memoryService: AIMemoryService
   aiChatId: string
-  allowProactiveMemory: boolean
 }): AgentTool<any, any>[] {
   const context: Omit<CrossChatToolExecutionContext, 'abortSignal' | 'reportProgress'> = {
     locale: options.locale,
@@ -31,7 +30,6 @@ export function createElectronCrossChatTools(options: {
     analysisService: options.analysisService,
     memoryService: options.memoryService,
     aiChatId: options.aiChatId,
-    allowProactiveMemory: options.allowProactiveMemory,
     maxToolResultTokens: options.maxToolResultTokens,
     countTokens,
     preprocessMessagesBySession: (sessionId, messages) =>
diff --git a/apps/desktop/main/internal-api/server.ts b/apps/desktop/main/internal-api/server.ts
index 2b765bb2..3422e89d 100644
--- a/apps/desktop/main/internal-api/server.ts
+++ b/apps/desktop/main/internal-api/server.ts
@@ -229,7 +229,6 @@ export async function startInternalServer(
         analysisService: crossChatAnalysisService,
         sessionAdapter,
         memoryService: newAIMemoryService,
-        getAllowProactiveMemory: () => preferencesManager.load().aiGlobalSettings.allowProactiveMemory,
       }),
       executeAiTool: createExecuteElectronAiTool(newSemanticIndexService ?? undefined),
     }
diff --git a/packages/node-runtime/src/preferences.test.ts b/packages/node-runtime/src/preferences.test.ts
index 4db1c39a..03a474fc 100644
--- a/packages/node-runtime/src/preferences.test.ts
+++ b/packages/node-runtime/src/preferences.test.ts
@@ -195,7 +195,7 @@ test('loads thinkingLevels as empty object when field is absent in legacy prefer
     // Write a legacy preferences.json that has no thinkingLevels field
     writeFileSync(
       join(systemDir, 'preferences.json'),
-      JSON.stringify({ aiGlobalSettings: { maxMessagesPerRequest: 500 } })
+      JSON.stringify({ aiGlobalSettings: { maxMessagesPerRequest: 500, allowProactiveMemory: false } })
     )
 
     const loaded = new PreferencesManager(systemDir).load()
@@ -204,7 +204,7 @@ test('loads thinkingLevels as empty object when field is absent in legacy prefer
     // Existing fields must survive the migration
     assert.equal(loaded.aiGlobalSettings.maxMessagesPerRequest, 500)
     assert.equal(loaded.aiGlobalSettings.chartAutoMode, 'suggest')
-    assert.equal(loaded.aiGlobalSettings.allowProactiveMemory, true)
+    assert.equal('allowProactiveMemory' in loaded.aiGlobalSettings, false)
   } finally {
     rmSync(systemDir, { recursive: true, force: true })
   }
diff --git a/packages/node-runtime/src/preferences.ts b/packages/node-runtime/src/preferences.ts
index d1c640a1..4334ddc9 100644
--- a/packages/node-runtime/src/preferences.ts
+++ b/packages/node-runtime/src/preferences.ts
@@ -49,7 +49,6 @@ const DEFAULTS: Preferences = {
     sqlExportFormat: 'csv',
     enableAutoSkill: true,
     chartAutoMode: 'suggest',
-    allowProactiveMemory: true,
     searchContextBefore: 2,
     searchContextAfter: 2,
   },
@@ -152,10 +151,10 @@ export class PreferencesManager {
 
   private normalizeAiGlobalSettings(partial: Partial<AIGlobalSettings> | undefined): AIGlobalSettings {
     const normalized = { ...(partial ?? {}) } as Record<string, unknown>
-    // Context compression became an automatic runtime capability. Ignore the
-    // legacy user preference so a previously disabled value cannot survive
-    // after the setting is removed.
+    // Ignore removed settings so legacy values cannot survive normalization
+    // and accidentally re-enable obsolete behavior after a later save.
     delete normalized.contextCompression
+    delete normalized.allowProactiveMemory
     return { ...DEFAULTS.aiGlobalSettings, ...(normalized as Partial<AIGlobalSettings>) }
   }
 
diff --git a/packages/shared-types/index.ts b/packages/shared-types/index.ts
index 15f4a6b9..7127ee84 100644
--- a/packages/shared-types/index.ts
+++ b/packages/shared-types/index.ts
@@ -295,7 +295,6 @@ export interface AIGlobalSettings {
   sqlExportFormat: 'csv' | 'json'
   enableAutoSkill: boolean
   chartAutoMode: ChartAutoMode
-  allowProactiveMemory: boolean
   searchContextBefore: number
   searchContextAfter: number
 }
diff --git a/packages/tools/src/agent-adapter.test.ts b/packages/tools/src/agent-adapter.test.ts
index e3615723..e29276e4 100644
--- a/packages/tools/src/agent-adapter.test.ts
+++ b/packages/tools/src/agent-adapter.test.ts
@@ -64,7 +64,6 @@ test('the shared Desktop and CLI Web adapter exposes and executes all thirteen c
     analysisService,
     memoryService: {} as Parameters<typeof createCrossChatAgentToolAdapters>[0]['memoryService'],
     aiChatId: 'global-chat-test',
-    allowProactiveMemory: true,
     maxToolResultTokens: 16_000,
     preprocessMessagesBySession: async (_sessionId, messages) => messages,
     preprocessSummariesBySession: async (_sessionId, summaries) => summaries,
@@ -128,7 +127,6 @@ test('cross-chat tool adapters share entities resolved during the current Agent
     analysisService,
     memoryService,
     aiChatId: 'global-chat-test',
-    allowProactiveMemory: true,
     maxToolResultTokens: 16_000,
     preprocessMessagesBySession: async (_sessionId, messages) => messages,
     preprocessSummariesBySession: async (_sessionId, summaries) => summaries,
diff --git a/packages/tools/src/definitions/cross-chat-tools.test.ts b/packages/tools/src/definitions/cross-chat-tools.test.ts
index 8429b5d9..5cf140ec 100644
--- a/packages/tools/src/definitions/cross-chat-tools.test.ts
+++ b/packages/tools/src/definitions/cross-chat-tools.test.ts
@@ -499,7 +499,6 @@ function createContext(overrides: Partial<CrossChatAnalysisToolService> = {}): C
     analysisService: service,
     memoryService: {} as CrossChatToolExecutionContext['memoryService'],
     aiChatId: 'global-chat-test',
-    allowProactiveMemory: true,
     preprocessMessagesBySession: (_sessionId, messages) =>
       messages.map((message) => ({ ...message, senderName: 'U1', content: '[redacted]' })),
     preprocessSummariesBySession: (_sessionId, summaries) => summaries,
diff --git a/packages/tools/src/definitions/memory-tools.test.ts b/packages/tools/src/definitions/memory-tools.test.ts
index 20618ed5..462e4bf6 100644
--- a/packages/tools/src/definitions/memory-tools.test.ts
+++ b/packages/tools/src/definitions/memory-tools.test.ts
@@ -101,7 +101,7 @@ function entityResolution(refs: AIEntityRef[]): CrossChatEntityResolution {
 }
 
 function createContext(
-  options: { allowProactiveMemory?: boolean; entityRefs?: AIEntityRef[]; resolvedEntityRefs?: AIEntityRef[] } = {}
+  options: { entityRefs?: AIEntityRef[]; resolvedEntityRefs?: AIEntityRef[] } = {}
 ): CrossChatToolExecutionContext {
   const analysisService = {
     resolveEntities: async (refs: AIEntityRef[]) => entityResolution(refs),
@@ -113,7 +113,6 @@ function createContext(
     analysisService,
     memoryService: new FakeMemoryService(),
     aiChatId: 'global-chat-1',
-    allowProactiveMemory: options.allowProactiveMemory ?? true,
     preprocessMessagesBySession: (_sessionId, messages) => messages,
     preprocessSummariesBySession: (_sessionId, summaries) => summaries,
     preprocessModelLabel: (value) => value,
@@ -185,19 +184,13 @@ describe('global memory tools', () => {
     )
   })
 
-  it('blocks proactive AI writes when disabled but keeps explicit user writes available', async () => {
-    const context = createContext({ allowProactiveMemory: false })
-    await assert.rejects(
-      async () =>
-        memoryWriteTool.handler({ scope_type: 'global', content: 'AI inference', source_type: 'ai' }, context),
-      /disabled/i
-    )
-
+  it('writes durable AI-derived memories', async () => {
+    const context = createContext()
     const result = await memoryWriteTool.handler(
-      { scope_type: 'global', content: '用户明确要求记住', source_type: 'user' },
+      { scope_type: 'global', content: 'AI 根据聊天证据形成的稳定结论', source_type: 'ai' },
       context
     )
-    assert.equal((result.data as AIMemoryEntry).sourceType, 'user')
+    assert.equal((result.data as AIMemoryEntry).sourceType, 'ai')
   })
 
   it('reads and writes self memory on demand without an entity id', async () => {
diff --git a/packages/tools/src/definitions/memory-tools.ts b/packages/tools/src/definitions/memory-tools.ts
index 0f5771eb..153318f8 100644
--- a/packages/tools/src/definitions/memory-tools.ts
+++ b/packages/tools/src/definitions/memory-tools.ts
@@ -95,9 +95,6 @@ async function memoryWriteHandler(
   await assertResolvableEntityScope(scope, context)
   const content = requireString(params.content, 'content')
   const sourceType = parseSourceType(params.source_type)
-  if (sourceType === 'ai' && !context.allowProactiveMemory) {
-    throw new Error('Proactive AI memory is disabled; only explicit user memory writes are allowed')
-  }
 
   const id = optionalString(params.id)
   let entry: AIMemoryEntry
diff --git a/packages/tools/src/types.ts b/packages/tools/src/types.ts
index 1f849250..2460dc69 100644
--- a/packages/tools/src/types.ts
+++ b/packages/tools/src/types.ts
@@ -433,7 +433,6 @@ export interface CrossChatToolExecutionContext {
   analysisService: CrossChatAnalysisToolService
   memoryService: AIMemoryToolService
   aiChatId: string
-  allowProactiveMemory: boolean
   preprocessMessagesBySession: (
     sessionId: string,
     messages: CrossChatMessageSource[]
diff --git a/src/components/AIChat/memory/AIMemoryManagerModal.vue b/src/components/AIChat/memory/AIMemoryManagerModal.vue
index 9332efd4..c0771ab4 100644
--- a/src/components/AIChat/memory/AIMemoryManagerModal.vue
+++ b/src/components/AIChat/memory/AIMemoryManagerModal.vue
@@ -1,11 +1,9 @@
 <script setup lang="ts">
 import { computed, ref, watch } from 'vue'
-import { storeToRefs } from 'pinia'
 import { useI18n } from 'vue-i18n'
 import type { AIMemoryEntry } from '@/services/ai/types'
 import { useAIService, useDataService } from '@/services'
 import { useToast } from '@/composables/useToast'
-import { usePromptStore } from '@/stores/prompt'
 import { useSessionStore } from '@/stores/session'
 
 type MemoryView = 'preferences' | 'self' | 'entities'
@@ -17,9 +15,7 @@ const { t, locale } = useI18n()
 const toast = useToast()
 const aiService = useAIService()
 const dataService = useDataService()
-const promptStore = usePromptStore()
 const sessionStore = useSessionStore()
-const { aiGlobalSettings } = storeToRefs(promptStore)
 
 const activeView = ref<MemoryView>('preferences')
 const entries = ref<AIMemoryEntry[]>([])
@@ -43,11 +39,6 @@ const visibleEntries = computed(() =>
         : entry.scopeType === 'contact' || entry.scopeType === 'group'
   )
 )
-const proactiveMemory = computed({
-  get: () => aiGlobalSettings.value.allowProactiveMemory ?? true,
-  set: (value: boolean) => promptStore.updateAIGlobalSettings({ allowProactiveMemory: value }),
-})
-
 function close(): void {
   emit('update:open', false)
 }
@@ -206,16 +197,6 @@ watch(
         </header>
 
         <div class="flex min-h-0 flex-1 flex-col px-5 py-4">
-          <div class="mb-4 flex items-center justify-between rounded-xl bg-gray-50 px-4 py-3 dark:bg-gray-900/60">
-            <div class="min-w-0 pr-4">
-              <p class="text-sm text-gray-900 dark:text-gray-100">{{ t('ai.global.memory.proactive.title') }}</p>
-              <p class="mt-0.5 text-xs leading-5 text-gray-500 dark:text-gray-400">
-                {{ t('ai.global.memory.proactive.description') }}
-              </p>
-            </div>
-            <USwitch v-model="proactiveMemory" />
-          </div>
-
           <div class="mb-3 flex items-center justify-between gap-3">
             <UTabs v-model="activeView" :items="viewItems" :content="false" size="sm" class="min-w-max" />
             <span class="text-xs text-gray-400">
diff --git a/src/i18n/locales/en-US/ai.json b/src/i18n/locales/en-US/ai.json
index 65340dc4..f4d6ae88 100644
--- a/src/i18n/locales/en-US/ai.json
+++ b/src/i18n/locales/en-US/ai.json
@@ -288,10 +288,6 @@
       "entities": "Contacts and groups",
       "count": "{count} items",
       "empty": "No memories yet. You can ask AI to remember something in a conversation.",
-      "proactive": {
-        "title": "Allow proactive AI memory",
-        "description": "Let AI save long-term preferences, personal context, and relationship insights. Explicit requests to remember still work when this is off."
-      },
       "source": {
         "user": "User confirmed",
         "ai": "AI generated"
diff --git a/src/i18n/locales/ja-JP/ai.json b/src/i18n/locales/ja-JP/ai.json
index 4f8f9366..b0def3f3 100644
--- a/src/i18n/locales/ja-JP/ai.json
+++ b/src/i18n/locales/ja-JP/ai.json
@@ -288,10 +288,6 @@
       "entities": "連絡先とグループ",
       "count": "{count} 件",
       "empty": "メモリはまだありません。会話で AI に覚えるよう依頼できます。",
-      "proactive": {
-        "title": "AI による自発的な記憶を許可",
-        "description": "長期的に役立つ設定、本人の背景、関係性の知見を AI が保存できます。オフでも、明示的に記憶を依頼した内容は保存されます。"
-      },
       "source": {
         "user": "ユーザー確認済み",
         "ai": "AI が生成"
diff --git a/src/i18n/locales/zh-CN/ai.json b/src/i18n/locales/zh-CN/ai.json
index 93b2f8c3..f9910aec 100644
--- a/src/i18n/locales/zh-CN/ai.json
+++ b/src/i18n/locales/zh-CN/ai.json
@@ -288,10 +288,6 @@
       "entities": "联系人和群聊",
       "count": "{count} 条",
       "empty": "暂无记忆，你可以在对话中让 AI 记住。",
-      "proactive": {
-        "title": "允许 AI 主动记忆",
-        "description": "允许 AI 保存有长期价值的偏好、个人背景和关系结论；关闭后仍会保存你明确要求记住的内容。"
-      },
       "source": {
         "user": "用户确认",
         "ai": "AI 形成"
diff --git a/src/i18n/locales/zh-TW/ai.json b/src/i18n/locales/zh-TW/ai.json
index 9c919998..3db55a8e 100644
--- a/src/i18n/locales/zh-TW/ai.json
+++ b/src/i18n/locales/zh-TW/ai.json
@@ -288,10 +288,6 @@
       "entities": "聯絡人和群聊",
       "count": "{count} 條",
       "empty": "暫無記憶，你可以在對話中讓 AI 記住。",
-      "proactive": {
-        "title": "允許 AI 主動記憶",
-        "description": "允許 AI 儲存有長期價值的偏好、個人背景與關係結論；關閉後仍會儲存你明確要求記住的內容。"
-      },
       "source": {
         "user": "使用者確認",
         "ai": "AI 形成"
diff --git a/src/stores/prompt.ts b/src/stores/prompt.ts
index 208de44b..77947837 100644
--- a/src/stores/prompt.ts
+++ b/src/stores/prompt.ts
@@ -10,7 +10,6 @@ interface AIGlobalSettings {
   sqlExportFormat: 'csv' | 'json'
   enableAutoSkill: boolean
   chartAutoMode: ChartAutoMode
-  allowProactiveMemory: boolean
   searchContextBefore: number
   searchContextAfter: number
 }
@@ -30,7 +29,6 @@ export const usePromptStore = defineStore(
       sqlExportFormat: 'csv',
       enableAutoSkill: true,
       chartAutoMode: 'suggest',
-      allowProactiveMemory: true,
       searchContextBefore: 2,
       searchContextAfter: 2,
     })
diff --git a/tests/global-ai-memory-loop.test.ts b/tests/global-ai-memory-loop.test.ts
index 650bcec9..482ccc89 100644
--- a/tests/global-ai-memory-loop.test.ts
+++ b/tests/global-ai-memory-loop.test.ts
@@ -59,7 +59,6 @@ it('recalls a durable preference in a new global AI conversation before querying
     analysisService,
     memoryService,
     aiChatId,
-    allowProactiveMemory: true,
     preprocessMessagesBySession: (_sessionId, messages) => messages,
     preprocessSummariesBySession: (_sessionId, summaries) => summaries,
     preprocessModelLabel: (value) => value,