feat(ai): split shared provider config from Anki runtime

src/ai/client.ts

@@ -0,0 +1,118 @@
+import { exec as execCallback } from 'node:child_process';
+import { promisify } from 'node:util';
+import axios from 'axios';
+
+import type { AiConfig } from '../types';
+
+const DEFAULT_AI_BASE_URL = 'https://openrouter.ai/api';
+const DEFAULT_AI_MODEL = 'openai/gpt-4o-mini';
+const DEFAULT_AI_TIMEOUT_MS = 15_000;
+
+const exec = promisify(execCallback);
+
+export function extractAiText(content: unknown): string {
+  if (typeof content === 'string') {
+    return content.trim();
+  }
+  if (!Array.isArray(content)) {
+    return '';
+  }
+
+  const parts: string[] = [];
+  for (const item of content) {
+    if (
+      item &&
+      typeof item === 'object' &&
+      'type' in item &&
+      (item as { type?: unknown }).type === 'text' &&
+      'text' in item &&
+      typeof (item as { text?: unknown }).text === 'string'
+    ) {
+      parts.push((item as { text: string }).text);
+    }
+  }
+
+  return parts.join('').trim();
+}
+
+export function normalizeOpenAiBaseUrl(baseUrl: string): string {
+  const trimmed = baseUrl.trim().replace(/\/+$/, '');
+  if (/\/v1$/i.test(trimmed)) {
+    return trimmed;
+  }
+  return `${trimmed}/v1`;
+}
+
+export async function resolveAiApiKey(
+  config: Pick<AiConfig, 'apiKey' | 'apiKeyCommand'>,
+): Promise<string | null> {
+  if (config.apiKey && config.apiKey.trim()) {
+    return config.apiKey.trim();
+  }
+  if (config.apiKeyCommand && config.apiKeyCommand.trim()) {
+    try {
+      const { stdout } = await exec(config.apiKeyCommand, { timeout: 10_000 });
+      const key = stdout.trim();
+      return key.length > 0 ? key : null;
+    } catch {
+      return null;
+    }
+  }
+  return null;
+}
+
+export interface AiChatMessage {
+  role: 'system' | 'user' | 'assistant';
+  content: string;
+}
+
+export interface AiChatCompletionRequest {
+  apiKey: string;
+  baseUrl?: string;
+  model?: string;
+  timeoutMs?: number;
+  messages: AiChatMessage[];
+}
+
+export interface AiChatCompletionCallbacks {
+  logWarning: (message: string) => void;
+}
+
+export async function requestAiChatCompletion(
+  request: AiChatCompletionRequest,
+  callbacks: AiChatCompletionCallbacks,
+): Promise<string | null> {
+  if (!request.apiKey.trim()) {
+    return null;
+  }
+
+  const baseUrl = normalizeOpenAiBaseUrl(request.baseUrl || DEFAULT_AI_BASE_URL);
+  const model = request.model || DEFAULT_AI_MODEL;
+  const timeoutMs = request.timeoutMs ?? DEFAULT_AI_TIMEOUT_MS;
+
+  try {
+    const response = await axios.post(
+      `${baseUrl}/chat/completions`,
+      {
+        model,
+        temperature: 0,
+        messages: request.messages,
+      },
+      {
+        headers: {
+          Authorization: `Bearer ${request.apiKey}`,
+          'Content-Type': 'application/json',
+        },
+        timeout: timeoutMs,
+      },
+    );
+    const content = (response.data as { choices?: unknown[] })?.choices?.[0] as
+      | { message?: { content?: unknown } }
+      | undefined;
+    return extractAiText(content?.message?.content) || null;
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Unknown AI request error';
+    callbacks.logWarning(`AI request failed: ${message}`);
+    return null;
+  }
+}

src/ai/config.ts

@@ -0,0 +1,27 @@
+import type { AiConfig, AiFeatureConfig } from '../types';
+
+function trimToOverride(value: string | undefined): string | undefined {
+  if (typeof value !== 'string') return undefined;
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : undefined;
+}
+
+export function mergeAiConfig(
+  sharedConfig: AiConfig | undefined,
+  featureConfig?: AiFeatureConfig | boolean | null,
+): AiConfig {
+  const overrides =
+    featureConfig && typeof featureConfig === 'object' ? featureConfig : undefined;
+  const modelOverride = trimToOverride(overrides?.model);
+  const systemPromptOverride = trimToOverride(overrides?.systemPrompt);
+
+  return {
+    enabled: sharedConfig?.enabled,
+    apiKey: sharedConfig?.apiKey,
+    apiKeyCommand: sharedConfig?.apiKeyCommand,
+    baseUrl: sharedConfig?.baseUrl,
+    model: modelOverride ?? sharedConfig?.model,
+    systemPrompt: systemPromptOverride ?? sharedConfig?.systemPrompt,
+    requestTimeoutMs: sharedConfig?.requestTimeoutMs,
+  };
+}

src/anki-integration.ts

@@ -21,6 +21,7 @@ import { SubtitleTimingTracker } from './subtitle-timing-tracker';
 import { MediaGenerator } from './media-generator';
 import path from 'path';
 import {
+  AiConfig,
   AnkiConnectConfig,
   KikuDuplicateCardInfo,
   KikuFieldGroupingChoice,
@@ -135,6 +136,7 @@ export class AnkiIntegration {
   private noteUpdateWorkflow: NoteUpdateWorkflow;
   private fieldGroupingWorkflow: FieldGroupingWorkflow;
   private runtime: AnkiIntegrationRuntime;
+  private aiConfig: AiConfig;
 
   constructor(
     config: AnkiConnectConfig,
@@ -147,8 +149,10 @@ export class AnkiIntegration {
       duplicate: KikuDuplicateCardInfo;
     }) => Promise<KikuFieldGroupingChoice>,
     knownWordCacheStatePath?: string,
+    aiConfig: AiConfig = {},
   ) {
     this.config = normalizeAnkiIntegrationConfig(config);
+    this.aiConfig = { ...aiConfig };
     this.client = new AnkiConnectClient(this.config.url!);
     this.mediaGenerator = new MediaGenerator();
     this.timingTracker = timingTracker;
@@ -253,6 +257,7 @@ export class AnkiIntegration {
   private createCardCreationService(): CardCreationService {
     return new CardCreationService({
       getConfig: () => this.config,
+      getAiConfig: () => this.aiConfig,
       getTimingTracker: () => this.timingTracker,
       getMpvClient: () => this.mpvClient,
       getDeck: () => this.config.deck,
@@ -1096,7 +1101,10 @@ export class AnkiIntegration {
     return requiredFields.every((fieldName) => this.hasFieldValue(noteInfo, fieldName));
   }
 
-  applyRuntimeConfigPatch(patch: Partial<AnkiConnectConfig>): void {
+  applyRuntimeConfigPatch(patch: Partial<AnkiConnectConfig>, aiConfig?: AiConfig): void {
+    if (aiConfig) {
+      this.aiConfig = { ...aiConfig };
+    }
     this.runtime.applyRuntimeConfigPatch(patch);
   }
 

src/anki-integration/ai.test.ts

@@ -0,0 +1,64 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { resolveSentenceBackText } from './ai';
+
+test('resolveSentenceBackText returns secondary subtitle when ai is disabled', async () => {
+  const result = await resolveSentenceBackText(
+    {
+      sentence: '日本語',
+      secondarySubText: 'existing translation',
+      aiEnabled: false,
+      aiConfig: {},
+    },
+    {
+      logWarning: () => undefined,
+    },
+  );
+
+  assert.equal(result, 'existing translation');
+});
+
+test('resolveSentenceBackText uses shared ai config when enabled', async () => {
+  const result = await resolveSentenceBackText(
+    {
+      sentence: '日本語',
+      secondarySubText: '',
+      aiEnabled: true,
+      aiConfig: {
+        enabled: true,
+        apiKey: 'abc',
+        model: 'openai/gpt-4o-mini',
+      },
+    },
+    {
+      logWarning: () => undefined,
+      translateSentence: async (request) => {
+        assert.equal(request.apiKey, 'abc');
+        assert.equal(request.model, 'openai/gpt-4o-mini');
+        return 'translated';
+      },
+    },
+  );
+
+  assert.equal(result, 'translated');
+});
+
+test('resolveSentenceBackText falls back to sentence when ai translation fails with no secondary subtitle', async () => {
+  const result = await resolveSentenceBackText(
+    {
+      sentence: '日本語',
+      aiEnabled: true,
+      aiConfig: {
+        enabled: true,
+        apiKey: 'abc',
+      },
+    },
+    {
+      logWarning: () => undefined,
+      translateSentence: async () => null,
+    },
+  );
+
+  assert.equal(result, '日本語');
+});

src/anki-integration/ai.ts

@@ -1,50 +1,16 @@
-import axios from 'axios';
-
-import { DEFAULT_ANKI_CONNECT_CONFIG } from '../config';
+import type { AiConfig } from '../types';
+import { requestAiChatCompletion } from '../ai/client';
 
 const DEFAULT_AI_SYSTEM_PROMPT =
   'You are a translation engine. Return only the translated text with no explanations.';
 
-export function extractAiText(content: unknown): string {
-  if (typeof content === 'string') {
-    return content.trim();
-  }
-  if (!Array.isArray(content)) {
-    return '';
-  }
-
-  const parts: string[] = [];
-  for (const item of content) {
-    if (
-      item &&
-      typeof item === 'object' &&
-      'type' in item &&
-      (item as { type?: unknown }).type === 'text' &&
-      'text' in item &&
-      typeof (item as { text?: unknown }).text === 'string'
-    ) {
-      parts.push((item as { text: string }).text);
-    }
-  }
-
-  return parts.join('').trim();
-}
-
-export function normalizeOpenAiBaseUrl(baseUrl: string): string {
-  const trimmed = baseUrl.trim().replace(/\/+$/, '');
-  if (/\/v1$/i.test(trimmed)) {
-    return trimmed;
-  }
-  return `${trimmed}/v1`;
-}
-
 export interface AiTranslateRequest {
   sentence: string;
   apiKey: string;
   baseUrl?: string;
   model?: string;
-  targetLanguage?: string;
   systemPrompt?: string;
+  requestTimeoutMs?: number;
 }
 
 export interface AiTranslateCallbacks {
@@ -54,68 +20,46 @@ export interface AiTranslateCallbacks {
 export interface AiSentenceTranslationInput {
   sentence: string;
   secondarySubText?: string;
-  config: {
-    apiKey?: string;
-    baseUrl?: string;
-    model?: string;
-    targetLanguage?: string;
-    systemPrompt?: string;
-    enabled?: boolean;
-    alwaysUseAiTranslation?: boolean;
-  };
+  aiEnabled: boolean;
+  aiConfig: AiConfig;
 }
 
 export interface AiSentenceTranslationCallbacks {
   logWarning: (message: string) => void;
+  translateSentence?: (
+    request: AiTranslateRequest,
+    callbacks: AiTranslateCallbacks,
+  ) => Promise<string | null>;
 }
 
 export async function translateSentenceWithAi(
   request: AiTranslateRequest,
   callbacks: AiTranslateCallbacks,
 ): Promise<string | null> {
-  const aiConfig = DEFAULT_ANKI_CONNECT_CONFIG.ai;
   if (!request.apiKey.trim()) {
     return null;
   }
-
-  const baseUrl = normalizeOpenAiBaseUrl(
-    request.baseUrl || aiConfig.baseUrl || 'https://openrouter.ai/api',
-  );
-  const model = request.model || 'openai/gpt-4o-mini';
-  const targetLanguage = request.targetLanguage || 'English';
   const prompt = request.systemPrompt?.trim() || DEFAULT_AI_SYSTEM_PROMPT;
 
-  try {
-    const response = await axios.post(
-      `${baseUrl}/chat/completions`,
-      {
-        model,
-        temperature: 0,
-        messages: [
-          { role: 'system', content: prompt },
-          {
-            role: 'user',
-            content: `Translate this text to ${targetLanguage}:\n\n${request.sentence}`,
-          },
-        ],
-      },
-      {
-        headers: {
-          Authorization: `Bearer ${request.apiKey}`,
-          'Content-Type': 'application/json',
+  return requestAiChatCompletion(
+    {
+      apiKey: request.apiKey,
+      baseUrl: request.baseUrl,
+      model: request.model,
+      timeoutMs: request.requestTimeoutMs,
+      messages: [
+        { role: 'system', content: prompt },
+        {
+          role: 'user',
+          content: `Translate this text to English:\n\n${request.sentence}`,
         },
-        timeout: 15000,
-      },
-    );
-    const content = (response.data as { choices?: unknown[] })?.choices?.[0] as
-      | { message?: { content?: unknown } }
-      | undefined;
-    return extractAiText(content?.message?.content) || null;
-  } catch (error) {
-    const message = error instanceof Error ? error.message : 'Unknown translation error';
-    callbacks.logWarning(`AI translation failed: ${message}`);
-    return null;
-  }
+      ],
+    },
+    {
+      logWarning: (message) =>
+        callbacks.logWarning(message.replace(/^AI request failed:/, 'AI translation failed:')),
+    },
+  );
 }
 
 export async function resolveSentenceBackText(
@@ -125,25 +69,23 @@ export async function resolveSentenceBackText(
   const hasSecondarySub = Boolean(input.secondarySubText?.trim());
   let backText = input.secondarySubText?.trim() || '';
 
-  const aiConfig = {
-    ...DEFAULT_ANKI_CONNECT_CONFIG.ai,
-    ...input.config,
-  };
   const shouldAttemptAiTranslation =
-    aiConfig.enabled === true && (aiConfig.alwaysUseAiTranslation === true || !hasSecondarySub);
+    input.aiEnabled === true && input.aiConfig.enabled === true && !hasSecondarySub;
 
   if (!shouldAttemptAiTranslation) return backText;
 
+  const translateSentence = callbacks.translateSentence ?? translateSentenceWithAi;
+
   const request: AiTranslateRequest = {
     sentence: input.sentence,
-    apiKey: aiConfig.apiKey ?? '',
-    baseUrl: aiConfig.baseUrl,
-    model: aiConfig.model,
-    targetLanguage: aiConfig.targetLanguage,
-    systemPrompt: aiConfig.systemPrompt,
+    apiKey: input.aiConfig.apiKey ?? '',
+    baseUrl: input.aiConfig.baseUrl,
+    model: input.aiConfig.model,
+    systemPrompt: input.aiConfig.systemPrompt,
+    requestTimeoutMs: input.aiConfig.requestTimeoutMs,
   };
 
-  const translated = await translateSentenceWithAi(request, {
+  const translated = await translateSentence(request, {
     logWarning: (message) => callbacks.logWarning(message),
   });
 

src/anki-integration/card-creation.ts

@@ -1,5 +1,5 @@
 import { DEFAULT_ANKI_CONNECT_CONFIG } from '../config';
-import { AnkiConnectConfig } from '../types';
+import { AiConfig, AnkiConnectConfig } from '../types';
 import { createLogger } from '../logger';
 import { SubtitleTimingTracker } from '../subtitle-timing-tracker';
 import { MpvClient } from '../types';
@@ -62,6 +62,7 @@ interface CardCreationMediaGenerator {
 
 interface CardCreationDeps {
   getConfig: () => AnkiConnectConfig;
+  getAiConfig: () => AiConfig;
   getTimingTracker: () => SubtitleTimingTracker;
   getMpvClient: () => MpvClient;
   getDeck?: () => string | undefined;
@@ -495,11 +496,18 @@ export class CardCreationService {
 
         fields[sentenceField] = sentence;
 
+        const ankiAiConfig = this.deps.getConfig().ai;
+        const ankiAiEnabled =
+          typeof ankiAiConfig === 'object' && ankiAiConfig !== null
+            ? ankiAiConfig.enabled === true
+            : ankiAiConfig === true;
+
         const backText = await resolveSentenceBackText(
           {
             sentence,
             secondarySubText,
-            config: this.deps.getConfig().ai || {},
+            aiEnabled: ankiAiEnabled,
+            aiConfig: this.deps.getAiConfig(),
           },
           {
             logWarning: (message: string) => log.warn(message),

src/anki-integration/runtime.ts

@@ -30,6 +30,22 @@ function trimToNonEmptyString(value: unknown): string | null {
   return trimmed.length > 0 ? trimmed : null;
 }
 
+function normalizeAnkiAiConfig(config: AnkiConnectConfig['ai']): NonNullable<AnkiConnectConfig['ai']> {
+  if (config && typeof config === 'object') {
+    return {
+      enabled: config.enabled === true,
+      model: trimToNonEmptyString(config.model) ?? '',
+      systemPrompt: trimToNonEmptyString(config.systemPrompt) ?? '',
+    };
+  }
+
+  return {
+    enabled: config === true,
+    model: '',
+    systemPrompt: '',
+  };
+}
+
 export function normalizeAnkiIntegrationConfig(config: AnkiConnectConfig): AnkiConnectConfig {
   const resolvedUrl = trimToNonEmptyString(config.url) ?? DEFAULT_ANKI_CONNECT_CONFIG.url;
   const proxySource =
@@ -63,11 +79,7 @@ export function normalizeAnkiIntegrationConfig(config: AnkiConnectConfig): AnkiC
       port: normalizedProxyPort,
       upstreamUrl: normalizedProxyUpstreamUrl,
     },
-    ai: {
-      ...DEFAULT_ANKI_CONNECT_CONFIG.ai,
-      ...(config.openRouter ?? {}),
-      ...(config.ai ?? {}),
-    },
+    ai: normalizeAnkiAiConfig(config.ai),
     media: {
       ...DEFAULT_ANKI_CONNECT_CONFIG.media,
       ...(config.media ?? {}),

src/config/definitions.ts

@@ -31,7 +31,7 @@ const {
   startupWarmups,
   auto_start_overlay,
 } = CORE_DEFAULT_CONFIG;
-const { ankiConnect, jimaku, anilist, jellyfin, discordPresence, youtubeSubgen } =
+const { ankiConnect, jimaku, anilist, jellyfin, discordPresence, ai, youtubeSubgen } =
   INTEGRATIONS_DEFAULT_CONFIG;
 const { subtitleStyle } = SUBTITLE_DEFAULT_CONFIG;
 const { immersionTracking } = IMMERSION_DEFAULT_CONFIG;
@@ -54,6 +54,7 @@ export const DEFAULT_CONFIG: ResolvedConfig = {
   anilist,
   jellyfin,
   discordPresence,
+  ai,
   youtubeSubgen,
   immersionTracking,
 };

src/config/resolve/anki-connect.ts

@@ -13,7 +13,6 @@ export function applyAnkiConnectResolution(context: ResolveContext): void {
   const media = isObject(ac.media) ? (ac.media as Record<string, unknown>) : {};
   const metadata = isObject(ac.metadata) ? (ac.metadata as Record<string, unknown>) : {};
   const proxy = isObject(ac.proxy) ? (ac.proxy as Record<string, unknown>) : {};
-  const aiSource = isObject(ac.ai) ? ac.ai : isObject(ac.openRouter) ? ac.openRouter : {};
   const legacyKeys = new Set([
     'audioField',
     'imageField',
@@ -42,19 +41,11 @@ export function applyAnkiConnectResolution(context: ResolveContext): void {
     'autoUpdateNewCards',
   ]);
 
-  if (ac.openRouter !== undefined) {
-    context.warn(
-      'ankiConnect.openRouter',
-      ac.openRouter,
-      context.resolved.ankiConnect.ai,
-      'Deprecated key; use ankiConnect.ai instead.',
-    );
-  }
-
-  const { nPlusOne: _nPlusOneConfigFromAnkiConnect, ...ankiConnectWithoutNPlusOne } = ac as Record<
-    string,
-    unknown
-  >;
+  const {
+    nPlusOne: _nPlusOneConfigFromAnkiConnect,
+    ai: _ankiAiConfig,
+    ...ankiConnectWithoutNPlusOne
+  } = ac as Record<string, unknown>;
   const ankiConnectWithoutLegacy = Object.fromEntries(
     Object.entries(ankiConnectWithoutNPlusOne).filter(([key]) => !legacyKeys.has(key)),
   );
@@ -70,10 +61,6 @@ export function applyAnkiConnectResolution(context: ResolveContext): void {
         ? (ac.fields as (typeof context.resolved)['ankiConnect']['fields'])
         : {}),
     },
-    ai: {
-      ...context.resolved.ankiConnect.ai,
-      ...(aiSource as (typeof context.resolved)['ankiConnect']['ai']),
-    },
     media: {
       ...context.resolved.ankiConnect.media,
       ...(isObject(ac.media)
@@ -219,6 +206,56 @@ export function applyAnkiConnectResolution(context: ResolveContext): void {
     );
   }
 
+  if (isObject(ac.ai)) {
+    const aiEnabled = asBoolean(ac.ai.enabled);
+    if (aiEnabled !== undefined) {
+      context.resolved.ankiConnect.ai.enabled = aiEnabled;
+    } else if (ac.ai.enabled !== undefined) {
+      context.warn(
+        'ankiConnect.ai.enabled',
+        ac.ai.enabled,
+        context.resolved.ankiConnect.ai.enabled,
+        'Expected boolean.',
+      );
+    }
+
+    const aiModel = asString(ac.ai.model);
+    if (aiModel !== undefined) {
+      context.resolved.ankiConnect.ai.model = aiModel;
+    } else if (ac.ai.model !== undefined) {
+      context.warn(
+        'ankiConnect.ai.model',
+        ac.ai.model,
+        context.resolved.ankiConnect.ai.model,
+        'Expected string.',
+      );
+    }
+
+    const aiSystemPrompt = asString(ac.ai.systemPrompt);
+    if (aiSystemPrompt !== undefined) {
+      context.resolved.ankiConnect.ai.systemPrompt = aiSystemPrompt;
+    } else if (ac.ai.systemPrompt !== undefined) {
+      context.warn(
+        'ankiConnect.ai.systemPrompt',
+        ac.ai.systemPrompt,
+        context.resolved.ankiConnect.ai.systemPrompt,
+        'Expected string.',
+      );
+    }
+  } else {
+    const aiEnabled = asBoolean(ac.ai);
+    if (aiEnabled !== undefined) {
+      context.resolved.ankiConnect.ai.enabled = aiEnabled;
+    } else if (ac.ai !== undefined) {
+      context.warn(
+        'ankiConnect.ai',
+        ac.ai,
+        context.resolved.ankiConnect.ai.enabled,
+        'Expected boolean or object.',
+      );
+    }
+  }
+
   if (Array.isArray(ac.tags)) {
     const normalizedTags = ac.tags
       .filter((entry): entry is string => typeof entry === 'string')

src/config/resolve/integrations.ts

@@ -4,6 +4,46 @@ import { asBoolean, asNumber, asString, isObject } from './shared';
 export function applyIntegrationConfig(context: ResolveContext): void {
   const { src, resolved, warn } = context;
 
+  if (isObject(src.ai)) {
+    const booleanKeys = ['enabled'] as const;
+    for (const key of booleanKeys) {
+      const value = asBoolean(src.ai[key]);
+      if (value !== undefined) {
+        resolved.ai[key] = value;
+      } else if (src.ai[key] !== undefined) {
+        warn(`ai.${key}`, src.ai[key], resolved.ai[key], 'Expected boolean.');
+      }
+    }
+
+    const stringKeys = ['apiKey', 'apiKeyCommand', 'baseUrl', 'model', 'systemPrompt'] as const;
+    for (const key of stringKeys) {
+      const value = asString(src.ai[key]);
+      if (value !== undefined) {
+        resolved.ai[key] = value;
+      } else if (src.ai[key] !== undefined) {
+        warn(`ai.${key}`, src.ai[key], resolved.ai[key], 'Expected string.');
+      }
+    }
+
+    const requestTimeoutMs = asNumber(src.ai.requestTimeoutMs);
+    if (
+      requestTimeoutMs !== undefined &&
+      Number.isInteger(requestTimeoutMs) &&
+      requestTimeoutMs > 0
+    ) {
+      resolved.ai.requestTimeoutMs = requestTimeoutMs;
+    } else if (src.ai.requestTimeoutMs !== undefined) {
+      warn(
+        'ai.requestTimeoutMs',
+        src.ai.requestTimeoutMs,
+        resolved.ai.requestTimeoutMs,
+        'Expected positive integer.',
+      );
+    }
+  } else if (src.ai !== undefined) {
+    warn('ai', src.ai, resolved.ai, 'Expected object.');
+  }
+
   if (isObject(src.anilist)) {
     const enabled = asBoolean(src.anilist.enabled);
     if (enabled !== undefined) {

src/core/services/anki-jimaku.ts

@@ -1,5 +1,7 @@
 import { AnkiIntegration } from '../../anki-integration';
+import { mergeAiConfig } from '../../ai/config';
 import {
+  AiConfig,
   AnkiConnectConfig,
   JimakuApiResponse,
   JimakuEntry,
@@ -30,7 +32,7 @@ interface SubtitleTimingTrackerLike {
 
 export interface AnkiJimakuIpcRuntimeOptions {
   patchAnkiConnectEnabled: (enabled: boolean) => void;
-  getResolvedConfig: () => { ankiConnect?: AnkiConnectConfig };
+  getResolvedConfig: () => { ankiConnect?: AnkiConnectConfig; ai?: AiConfig };
   getRuntimeOptionsManager: () => RuntimeOptionsManagerLike | null;
   getSubtitleTimingTracker: () => SubtitleTimingTrackerLike | null;
   getMpvClient: () => MpvClientLike | null;
@@ -100,6 +102,7 @@ export function registerAnkiJimakuIpcRuntime(
           options.showDesktopNotification,
           options.createFieldGroupingCallback(),
           options.getKnownWordCacheStatePath(),
+          mergeAiConfig(config.ai, config.ankiConnect?.ai) as AiConfig,
         );
         integration.start();
         options.setAnkiIntegration(integration);

src/core/services/config-hot-reload.test.ts

@@ -125,10 +125,10 @@ test('config hot reload runtime reports validation warnings from reload', () =>
       config: deepCloneConfig(DEFAULT_CONFIG),
       warnings: [
         {
-          path: 'ankiConnect.openRouter',
-          message: 'Deprecated key; use ankiConnect.ai instead.',
+          path: 'ankiConnect.ai',
+          message: 'Expected boolean.',
           value: { enabled: true },
-          fallback: {},
+          fallback: false,
         },
       ],
       path: '/tmp/config.jsonc',

src/core/services/config-hot-reload.ts

@@ -73,7 +73,11 @@ function classifyDiff(prev: ResolvedConfig, next: ResolvedConfig): ConfigHotRelo
     if (key === 'ankiConnect') {
       const normalizedPrev = {
         ...prev.ankiConnect,
-        ai: next.ankiConnect.ai,
+        ai: {
+          enabled: next.ankiConnect.ai.enabled,
+          model: prev.ankiConnect.ai.model,
+          systemPrompt: prev.ankiConnect.ai.systemPrompt,
+        },
       };
       if (!isEqual(normalizedPrev, next.ankiConnect)) {
         restartRequiredFields.push('ankiConnect');

src/core/services/overlay-runtime-init.test.ts

@@ -109,6 +109,65 @@ test('initializeOverlayRuntime starts Anki integration when ankiConnect.enabled
   assert.equal(setIntegrationCalls, 1);
 });
 
+test('initializeOverlayRuntime merges shared ai config with Anki overrides', () => {
+  initializeOverlayRuntime({
+    backendOverride: null,
+    createMainWindow: () => {},
+    registerGlobalShortcuts: () => {},
+    updateVisibleOverlayBounds: () => {},
+    isVisibleOverlayVisible: () => false,
+    updateVisibleOverlayVisibility: () => {},
+    getOverlayWindows: () => [],
+    syncOverlayShortcuts: () => {},
+    setWindowTracker: () => {},
+    getMpvSocketPath: () => '/tmp/mpv.sock',
+    createWindowTracker: () => null,
+    getResolvedConfig: () => ({
+      ankiConnect: {
+        enabled: true,
+        ai: {
+          enabled: true,
+          model: 'openrouter/anki-model',
+          systemPrompt: 'Translate mined sentence text.',
+        },
+      } as never,
+      ai: {
+        enabled: true,
+        apiKey: 'shared-key',
+        baseUrl: 'https://openrouter.ai/api',
+        model: 'openrouter/shared-model',
+        systemPrompt: 'Legacy shared prompt.',
+        requestTimeoutMs: 15000,
+      },
+    }),
+    getSubtitleTimingTracker: () => ({}),
+    getMpvClient: () => ({
+      send: () => {},
+    }),
+    getRuntimeOptionsManager: () => ({
+      getEffectiveAnkiConnectConfig: (config) => config as never,
+    }),
+    createAnkiIntegration: (args) => {
+      assert.equal(args.aiConfig.apiKey, 'shared-key');
+      assert.equal(args.aiConfig.baseUrl, 'https://openrouter.ai/api');
+      assert.equal(args.aiConfig.model, 'openrouter/anki-model');
+      assert.equal(args.aiConfig.systemPrompt, 'Translate mined sentence text.');
+      return {
+        start: () => {},
+      };
+    },
+    setAnkiIntegration: () => {},
+    showDesktopNotification: () => {},
+    createFieldGroupingCallback: () => async () => ({
+      keepNoteId: 5,
+      deleteNoteId: 6,
+      deleteDuplicate: false,
+      cancelled: false,
+    }),
+    getKnownWordCacheStatePath: () => '/tmp/known-words-cache.json',
+  });
+});
+
 test('initializeOverlayRuntime re-syncs overlay shortcuts when tracker focus changes', () => {
   let syncCalls = 0;
   const tracker = {

src/core/services/overlay-runtime-init.ts

@@ -1,5 +1,6 @@
 import type { BrowserWindow } from 'electron';
 import { BaseWindowTracker, createWindowTracker } from '../../window-trackers';
+import { mergeAiConfig } from '../../ai/config';
 import {
   AiConfig,
   AnkiConnectConfig,
@@ -124,7 +125,7 @@ export function initializeOverlayRuntime(options: {
     const createAnkiIntegration = options.createAnkiIntegration ?? createDefaultAnkiIntegration;
     const integration = createAnkiIntegration({
       config: effectiveAnkiConfig,
-      aiConfig: config.ai ?? {},
+      aiConfig: mergeAiConfig(config.ai, config.ankiConnect?.ai),
       subtitleTimingTracker,
       mpvClient,
       showDesktopNotification: options.showDesktopNotification,

src/main/runtime/config-hot-reload-handlers.test.ts

@@ -19,7 +19,7 @@ test('createConfigHotReloadAppliedHandler runs all hot-reload effects', () => {
     broadcastToOverlayWindows: (channel, payload) =>
       calls.push(`broadcast:${channel}:${typeof payload === 'string' ? payload : 'object'}`),
     applyAnkiRuntimeConfigPatch: (patch) => {
-      ankiPatches.push({ enabled: patch.ai.enabled });
+      ankiPatches.push({ enabled: patch.ai });
     },
   });
 

src/main/runtime/config-hot-reload-handlers.ts

@@ -8,7 +8,7 @@ type ConfigHotReloadAppliedDeps = {
   refreshGlobalAndOverlayShortcuts: () => void;
   setSecondarySubMode: (mode: SecondarySubMode) => void;
   broadcastToOverlayWindows: (channel: string, payload: unknown) => void;
-  applyAnkiRuntimeConfigPatch: (patch: { ai: ResolvedConfig['ankiConnect']['ai'] }) => void;
+  applyAnkiRuntimeConfigPatch: (patch: { ai: ResolvedConfig['ankiConnect']['ai']['enabled'] }) => void;
 };
 
 type ConfigHotReloadMessageDeps = {
@@ -53,7 +53,7 @@ export function createConfigHotReloadAppliedHandler(deps: ConfigHotReloadApplied
     }
 
     if (diff.hotReloadFields.includes('ankiConnect.ai')) {
-      deps.applyAnkiRuntimeConfigPatch({ ai: config.ankiConnect.ai });
+      deps.applyAnkiRuntimeConfigPatch({ ai: config.ankiConnect.ai.enabled });
     }
 
     if (diff.hotReloadFields.length > 0) {

src/main/runtime/config-hot-reload-main-deps.test.ts

@@ -98,7 +98,7 @@ test('config hot reload applied main deps builder maps callbacks', () => {
   deps.refreshGlobalAndOverlayShortcuts();
   deps.setSecondarySubMode('hover');
   deps.broadcastToOverlayWindows('config:hot-reload', {});
-  deps.applyAnkiRuntimeConfigPatch({ ai: {} as never });
+  deps.applyAnkiRuntimeConfigPatch({ ai: true });
   assert.deepEqual(calls, [
     'keybindings',
     'refresh-shortcuts',

src/main/runtime/config-hot-reload-main-deps.ts

@@ -65,7 +65,7 @@ export function createBuildConfigHotReloadAppliedMainDepsHandler(deps: {
   refreshGlobalAndOverlayShortcuts: () => void;
   setSecondarySubMode: (mode: SecondarySubMode) => void;
   broadcastToOverlayWindows: (channel: string, payload: unknown) => void;
-  applyAnkiRuntimeConfigPatch: (patch: { ai: ResolvedConfig['ankiConnect']['ai'] }) => void;
+  applyAnkiRuntimeConfigPatch: (patch: { ai: ResolvedConfig['ankiConnect']['ai']['enabled'] }) => void;
 }) {
   return () => ({
     setKeybindings: (keybindings: ConfigHotReloadPayload['keybindings']) =>
@@ -74,7 +74,7 @@ export function createBuildConfigHotReloadAppliedMainDepsHandler(deps: {
     setSecondarySubMode: (mode: SecondarySubMode) => deps.setSecondarySubMode(mode),
     broadcastToOverlayWindows: (channel: string, payload: unknown) =>
       deps.broadcastToOverlayWindows(channel, payload),
-    applyAnkiRuntimeConfigPatch: (patch: { ai: ResolvedConfig['ankiConnect']['ai'] }) =>
+    applyAnkiRuntimeConfigPatch: (patch: { ai: ResolvedConfig['ankiConnect']['ai']['enabled'] }) =>
       deps.applyAnkiRuntimeConfigPatch(patch),
   });
 }