refactor: split twitter client

src/lib/index.ts

@@ -8,6 +8,7 @@ export {
   type TwitterCookies,
 } from './cookies.js';
 export { runtimeQueryIds } from './runtime-query-ids.js';
+export type { TweetResult, UploadMediaResult } from './twitter-client-types.js';
 export {
   type CurrentUserResult,
   type FollowingResult,

src/lib/twitter-client-base.ts

@@ -0,0 +1,139 @@
+import { randomBytes, randomUUID } from 'node:crypto';
+import { QUERY_IDS, TARGET_QUERY_ID_OPERATIONS, type OperationName } from './twitter-client-constants.js';
+import { runtimeQueryIds } from './runtime-query-ids.js';
+import { normalizeQuoteDepth } from './twitter-client-utils.js';
+import type { CurrentUserResult, TwitterClientOptions } from './twitter-client-types.js';
+
+export type Constructor<T = {}> = new (...args: any[]) => T;
+export type AbstractConstructor<T = {}> = abstract new (...args: any[]) => T;
+
+export abstract class TwitterClientBase {
+  protected authToken: string;
+  protected ct0: string;
+  protected cookieHeader: string;
+  protected userAgent: string;
+  protected timeoutMs?: number;
+  protected quoteDepth: number;
+  protected clientUuid: string;
+  protected clientDeviceId: string;
+  protected clientUserId?: string;
+
+  constructor(options: TwitterClientOptions) {
+    if (!options.cookies.authToken || !options.cookies.ct0) {
+      throw new Error('Both authToken and ct0 cookies are required');
+    }
+    this.authToken = options.cookies.authToken;
+    this.ct0 = options.cookies.ct0;
+    this.cookieHeader = options.cookies.cookieHeader || `auth_token=${this.authToken}; ct0=${this.ct0}`;
+    this.userAgent =
+      options.userAgent ||
+      'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36';
+    this.timeoutMs = options.timeoutMs;
+    this.quoteDepth = normalizeQuoteDepth(options.quoteDepth);
+    this.clientUuid = randomUUID();
+    this.clientDeviceId = randomUUID();
+  }
+
+  protected abstract getCurrentUser(): Promise<CurrentUserResult>;
+
+  protected async getQueryId(operationName: OperationName): Promise<string> {
+    const cached = await runtimeQueryIds.getQueryId(operationName);
+    return cached ?? QUERY_IDS[operationName];
+  }
+
+  protected async refreshQueryIds(): Promise<void> {
+    if (process.env.NODE_ENV === 'test') {
+      return;
+    }
+    try {
+      await runtimeQueryIds.refresh(TARGET_QUERY_ID_OPERATIONS, { force: true });
+    } catch {
+      // ignore refresh failures; callers will fall back to baked-in IDs
+    }
+  }
+
+  protected async getTweetDetailQueryIds(): Promise<string[]> {
+    const primary = await this.getQueryId('TweetDetail');
+    return Array.from(new Set([primary, '97JF30KziU00483E_8elBA', 'aFvUsJm2c-oDkJV75blV6g']));
+  }
+
+  protected async getSearchTimelineQueryIds(): Promise<string[]> {
+    const primary = await this.getQueryId('SearchTimeline');
+    return Array.from(
+      new Set([primary, 'M1jEez78PEfVfbQLvlWMvQ', '5h0kNbk3ii97rmfY6CdgAA', 'Tp1sewRU1AsZpBWhqCZicQ']),
+    );
+  }
+
+  protected async fetchWithTimeout(url: string, init: RequestInit): Promise<Response> {
+    if (!this.timeoutMs || this.timeoutMs <= 0) {
+      return fetch(url, init);
+    }
+
+    const controller = new AbortController();
+    const timeoutId = setTimeout(() => controller.abort(), this.timeoutMs);
+    try {
+      return await fetch(url, { ...init, signal: controller.signal });
+    } finally {
+      clearTimeout(timeoutId);
+    }
+  }
+
+  protected getHeaders(): Record<string, string> {
+    return this.getJsonHeaders();
+  }
+
+  protected createTransactionId(): string {
+    return randomBytes(16).toString('hex');
+  }
+
+  protected getBaseHeaders(): Record<string, string> {
+    const headers: Record<string, string> = {
+      accept: '*/*',
+      'accept-language': 'en-US,en;q=0.9',
+      authorization:
+        'Bearer AAAAAAAAAAAAAAAAAAAAANRILgAAAAAAnNwIzUejRCOuH5E6I8xnZz4puTs%3D1Zv7ttfk8LF81IUq16cHjhLTvJu4FA33AGWWjCpTnA',
+      'x-csrf-token': this.ct0,
+      'x-twitter-auth-type': 'OAuth2Session',
+      'x-twitter-active-user': 'yes',
+      'x-twitter-client-language': 'en',
+      'x-client-uuid': this.clientUuid,
+      'x-twitter-client-deviceid': this.clientDeviceId,
+      'x-client-transaction-id': this.createTransactionId(),
+      cookie: this.cookieHeader,
+      'user-agent': this.userAgent,
+      origin: 'https://x.com',
+      referer: 'https://x.com/',
+    };
+
+    if (this.clientUserId) {
+      headers['x-twitter-client-user-id'] = this.clientUserId;
+    }
+
+    return headers;
+  }
+
+  protected getJsonHeaders(): Record<string, string> {
+    return {
+      ...this.getBaseHeaders(),
+      'content-type': 'application/json',
+    };
+  }
+
+  protected getUploadHeaders(): Record<string, string> {
+    // Note: do not set content-type; URLSearchParams/FormData need to set it (incl boundary) themselves.
+    return this.getBaseHeaders();
+  }
+
+  protected async ensureClientUserId(): Promise<void> {
+    if (process.env.NODE_ENV === 'test') {
+      return;
+    }
+    if (this.clientUserId) {
+      return;
+    }
+    const result = await this.getCurrentUser();
+    if (result.success && result.user?.id) {
+      this.clientUserId = result.user.id;
+    }
+  }
+}

src/lib/twitter-client-constants.ts

@@ -0,0 +1,37 @@
+// biome-ignore lint/correctness/useImportExtensions: JSON module import doesn't use .js extension.
+import queryIds from './query-ids.json' with { type: 'json' };
+
+export const TWITTER_API_BASE = 'https://x.com/i/api/graphql';
+export const TWITTER_GRAPHQL_POST_URL = 'https://x.com/i/api/graphql';
+export const TWITTER_UPLOAD_URL = 'https://upload.twitter.com/i/media/upload.json';
+export const TWITTER_MEDIA_METADATA_URL = 'https://x.com/i/api/1.1/media/metadata/create.json';
+export const TWITTER_STATUS_UPDATE_URL = 'https://x.com/i/api/1.1/statuses/update.json';
+export const SETTINGS_SCREEN_NAME_REGEX = /"screen_name":"([^"]+)"/;
+export const SETTINGS_USER_ID_REGEX = /"user_id"\s*:\s*"(\d+)"/;
+export const SETTINGS_NAME_REGEX = /"name":"([^"\\]*(?:\\.[^"\\]*)*)"/;
+
+// Query IDs rotate frequently; the values in query-ids.json are refreshed by
+// scripts/update-query-ids.ts. The fallback values keep the client usable if
+// the file is missing or incomplete.
+export const FALLBACK_QUERY_IDS = {
+  CreateTweet: 'TAJw1rBsjAtdNgTdlo2oeg',
+  CreateRetweet: 'ojPdsZsimiJrUGLR1sjUtA',
+  FavoriteTweet: 'lI07N6Otwv1PhnEgXILM7A',
+  TweetDetail: '97JF30KziU00483E_8elBA',
+  SearchTimeline: 'M1jEez78PEfVfbQLvlWMvQ',
+  UserArticlesTweets: '8zBy9h4L90aDL02RsBcCFg',
+  Bookmarks: 'RV1g3b8n_SGOHwkqKYSCFw',
+  Following: 'BEkNpEt5pNETESoqMsTEGA',
+  Followers: 'kuFUYP9eV1FPoEy4N-pi7w',
+  Likes: 'JR2gceKucIKcVNB_9JkhsA',
+  BookmarkFolderTimeline: 'KJIQpsvxrTfRIlbaRIySHQ',
+} as const;
+
+export type OperationName = keyof typeof FALLBACK_QUERY_IDS;
+
+export const QUERY_IDS: Record<OperationName, string> = {
+  ...FALLBACK_QUERY_IDS,
+  ...(queryIds as Partial<Record<OperationName, string>>),
+};
+
+export const TARGET_QUERY_ID_OPERATIONS = Object.keys(FALLBACK_QUERY_IDS) as Array<OperationName>;

src/lib/twitter-client-features.ts

@@ -0,0 +1,210 @@
+export function buildArticleFeatures(): Record<string, boolean> {
+  return {
+    rweb_video_screen_enabled: true,
+    profile_label_improvements_pcf_label_in_post_enabled: true,
+    responsive_web_profile_redirect_enabled: true,
+    rweb_tipjar_consumption_enabled: true,
+    verified_phone_label_enabled: false,
+    creator_subscriptions_tweet_preview_api_enabled: true,
+    responsive_web_graphql_timeline_navigation_enabled: true,
+    responsive_web_graphql_skip_user_profile_image_extensions_enabled: false,
+    premium_content_api_read_enabled: false,
+    communities_web_enable_tweet_community_results_fetch: true,
+    c9s_tweet_anatomy_moderator_badge_enabled: true,
+    responsive_web_grok_analyze_button_fetch_trends_enabled: false,
+    responsive_web_grok_analyze_post_followups_enabled: false,
+    responsive_web_jetfuel_frame: true,
+    responsive_web_grok_share_attachment_enabled: true,
+    articles_preview_enabled: true,
+    responsive_web_edit_tweet_api_enabled: true,
+    graphql_is_translatable_rweb_tweet_is_translatable_enabled: true,
+    view_counts_everywhere_api_enabled: true,
+    longform_notetweets_consumption_enabled: true,
+    responsive_web_twitter_article_tweet_consumption_enabled: true,
+    tweet_awards_web_tipping_enabled: false,
+    responsive_web_grok_show_grok_translated_post: false,
+    responsive_web_grok_analysis_button_from_backend: true,
+    creator_subscriptions_quote_tweet_preview_enabled: false,
+    freedom_of_speech_not_reach_fetch_enabled: true,
+    standardized_nudges_misinfo: true,
+    tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled: true,
+    longform_notetweets_rich_text_read_enabled: true,
+    longform_notetweets_inline_media_enabled: true,
+    responsive_web_grok_image_annotation_enabled: true,
+    responsive_web_grok_imagine_annotation_enabled: true,
+    responsive_web_grok_community_note_auto_translation_is_enabled: false,
+    responsive_web_enhance_cards_enabled: false,
+  };
+}
+
+export function buildTweetDetailFeatures(): Record<string, boolean> {
+  return {
+    ...buildArticleFeatures(),
+    responsive_web_graphql_exclude_directive_enabled: true,
+    communities_web_enable_tweet_community_results_fetch: true,
+    responsive_web_twitter_article_plain_text_enabled: true,
+    responsive_web_twitter_article_seed_tweet_detail_enabled: true,
+    responsive_web_twitter_article_seed_tweet_summary_enabled: true,
+    longform_notetweets_rich_text_read_enabled: true,
+    longform_notetweets_inline_media_enabled: true,
+    responsive_web_edit_tweet_api_enabled: true,
+    tweet_awards_web_tipping_enabled: false,
+    creator_subscriptions_quote_tweet_preview_enabled: false,
+    verified_phone_label_enabled: false,
+  };
+}
+
+export function buildArticleFieldToggles(): Record<string, boolean> {
+  return {
+    withPayments: false,
+    withAuxiliaryUserLabels: false,
+    withArticleRichContentState: true,
+    withArticlePlainText: true,
+    withGrokAnalyze: false,
+    withDisallowedReplyControls: false,
+  };
+}
+
+export function buildSearchFeatures(): Record<string, boolean> {
+  return {
+    rweb_video_screen_enabled: true,
+    profile_label_improvements_pcf_label_in_post_enabled: true,
+    responsive_web_profile_redirect_enabled: true,
+    rweb_tipjar_consumption_enabled: true,
+    verified_phone_label_enabled: false,
+    creator_subscriptions_tweet_preview_api_enabled: true,
+    responsive_web_graphql_timeline_navigation_enabled: true,
+    responsive_web_graphql_exclude_directive_enabled: true,
+    responsive_web_graphql_skip_user_profile_image_extensions_enabled: false,
+    premium_content_api_read_enabled: false,
+    communities_web_enable_tweet_community_results_fetch: true,
+    c9s_tweet_anatomy_moderator_badge_enabled: true,
+    responsive_web_grok_analyze_button_fetch_trends_enabled: false,
+    responsive_web_grok_analyze_post_followups_enabled: false,
+    responsive_web_jetfuel_frame: true,
+    responsive_web_grok_share_attachment_enabled: true,
+    responsive_web_edit_tweet_api_enabled: true,
+    graphql_is_translatable_rweb_tweet_is_translatable_enabled: true,
+    view_counts_everywhere_api_enabled: true,
+    longform_notetweets_consumption_enabled: true,
+    responsive_web_twitter_article_tweet_consumption_enabled: true,
+    tweet_awards_web_tipping_enabled: false,
+    responsive_web_grok_show_grok_translated_post: false,
+    responsive_web_grok_analysis_button_from_backend: true,
+    creator_subscriptions_quote_tweet_preview_enabled: false,
+    freedom_of_speech_not_reach_fetch_enabled: true,
+    standardized_nudges_misinfo: true,
+    tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled: true,
+    rweb_video_timestamps_enabled: true,
+    longform_notetweets_rich_text_read_enabled: true,
+    longform_notetweets_inline_media_enabled: true,
+    responsive_web_grok_image_annotation_enabled: true,
+    responsive_web_grok_imagine_annotation_enabled: true,
+    responsive_web_grok_community_note_auto_translation_is_enabled: false,
+    articles_preview_enabled: true,
+    responsive_web_enhance_cards_enabled: false,
+  };
+}
+
+export function buildTweetCreateFeatures(): Record<string, boolean> {
+  return {
+    rweb_video_screen_enabled: true,
+    creator_subscriptions_tweet_preview_api_enabled: true,
+    premium_content_api_read_enabled: false,
+    communities_web_enable_tweet_community_results_fetch: true,
+    c9s_tweet_anatomy_moderator_badge_enabled: true,
+    responsive_web_grok_analyze_button_fetch_trends_enabled: false,
+    responsive_web_grok_analyze_post_followups_enabled: false,
+    responsive_web_jetfuel_frame: true,
+    responsive_web_grok_share_attachment_enabled: true,
+    responsive_web_edit_tweet_api_enabled: true,
+    graphql_is_translatable_rweb_tweet_is_translatable_enabled: true,
+    view_counts_everywhere_api_enabled: true,
+    longform_notetweets_consumption_enabled: true,
+    responsive_web_twitter_article_tweet_consumption_enabled: true,
+    tweet_awards_web_tipping_enabled: false,
+    responsive_web_grok_show_grok_translated_post: false,
+    responsive_web_grok_analysis_button_from_backend: true,
+    creator_subscriptions_quote_tweet_preview_enabled: false,
+    longform_notetweets_rich_text_read_enabled: true,
+    longform_notetweets_inline_media_enabled: true,
+    profile_label_improvements_pcf_label_in_post_enabled: true,
+    responsive_web_profile_redirect_enabled: false,
+    rweb_tipjar_consumption_enabled: true,
+    verified_phone_label_enabled: false,
+    articles_preview_enabled: true,
+    responsive_web_grok_community_note_auto_translation_is_enabled: false,
+    responsive_web_graphql_skip_user_profile_image_extensions_enabled: false,
+    freedom_of_speech_not_reach_fetch_enabled: true,
+    standardized_nudges_misinfo: true,
+    tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled: true,
+    responsive_web_grok_image_annotation_enabled: true,
+    responsive_web_grok_imagine_annotation_enabled: true,
+    responsive_web_graphql_timeline_navigation_enabled: true,
+    responsive_web_enhance_cards_enabled: false,
+  };
+}
+
+export function buildTimelineFeatures(): Record<string, boolean> {
+  return {
+    ...buildSearchFeatures(),
+    blue_business_profile_image_shape_enabled: true,
+    responsive_web_text_conversations_enabled: false,
+    tweetypie_unmention_optimization_enabled: true,
+    vibe_api_enabled: true,
+    responsive_web_twitter_blue_verified_badge_is_enabled: true,
+    interactive_text_enabled: true,
+    longform_notetweets_richtext_consumption_enabled: true,
+    responsive_web_media_download_video_enabled: false,
+  };
+}
+
+export function buildBookmarksFeatures(): Record<string, boolean> {
+  return {
+    ...buildTimelineFeatures(),
+    graphql_timeline_v2_bookmark_timeline: true,
+  };
+}
+
+export function buildLikesFeatures(): Record<string, boolean> {
+  return buildTimelineFeatures();
+}
+
+export function buildFollowingFeatures(): Record<string, boolean> {
+  return {
+    rweb_video_screen_enabled: true,
+    profile_label_improvements_pcf_label_in_post_enabled: false,
+    responsive_web_profile_redirect_enabled: true,
+    rweb_tipjar_consumption_enabled: true,
+    verified_phone_label_enabled: false,
+    creator_subscriptions_tweet_preview_api_enabled: true,
+    responsive_web_graphql_timeline_navigation_enabled: true,
+    responsive_web_graphql_skip_user_profile_image_extensions_enabled: false,
+    premium_content_api_read_enabled: true,
+    communities_web_enable_tweet_community_results_fetch: true,
+    c9s_tweet_anatomy_moderator_badge_enabled: true,
+    responsive_web_grok_analyze_button_fetch_trends_enabled: false,
+    responsive_web_grok_analyze_post_followups_enabled: false,
+    responsive_web_jetfuel_frame: false,
+    responsive_web_grok_share_attachment_enabled: false,
+    articles_preview_enabled: true,
+    responsive_web_edit_tweet_api_enabled: true,
+    graphql_is_translatable_rweb_tweet_is_translatable_enabled: true,
+    view_counts_everywhere_api_enabled: true,
+    longform_notetweets_consumption_enabled: true,
+    responsive_web_twitter_article_tweet_consumption_enabled: true,
+    tweet_awards_web_tipping_enabled: true,
+    responsive_web_grok_show_grok_translated_post: false,
+    responsive_web_grok_analysis_button_from_backend: false,
+    creator_subscriptions_quote_tweet_preview_enabled: false,
+    freedom_of_speech_not_reach_fetch_enabled: true,
+    standardized_nudges_misinfo: true,
+    tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled: true,
+    longform_notetweets_rich_text_read_enabled: true,
+    longform_notetweets_inline_media_enabled: true,
+    responsive_web_grok_image_annotation_enabled: false,
+    responsive_web_grok_imagine_annotation_enabled: false,
+    responsive_web_grok_community_note_auto_translation_is_enabled: false,
+    responsive_web_enhance_cards_enabled: false,
+  };
+}

src/lib/twitter-client-media.ts

@@ -0,0 +1,166 @@
+import { TWITTER_MEDIA_METADATA_URL, TWITTER_UPLOAD_URL } from './twitter-client-constants.js';
+import { type AbstractConstructor, type TwitterClientBase } from './twitter-client-base.js';
+import type { UploadMediaResult } from './twitter-client-types.js';
+
+export function withMedia<TBase extends AbstractConstructor<TwitterClientBase>>(Base: TBase) {
+  return class extends Base {
+    private mediaCategoryForMime(mimeType: string): string | null {
+      if (mimeType.startsWith('image/')) {
+        if (mimeType === 'image/gif') {
+          return 'tweet_gif';
+        }
+        return 'tweet_image';
+      }
+      if (mimeType.startsWith('video/')) {
+        return 'tweet_video';
+      }
+      return null;
+    }
+
+    private async sleep(ms: number): Promise<void> {
+      await new Promise((resolve) => setTimeout(resolve, ms));
+    }
+
+    async uploadMedia(input: { data: Uint8Array; mimeType: string; alt?: string }): Promise<UploadMediaResult> {
+      const category = this.mediaCategoryForMime(input.mimeType);
+      if (!category) {
+        return { success: false, error: `Unsupported media type: ${input.mimeType}` };
+      }
+
+      try {
+        const initParams = new URLSearchParams({
+          command: 'INIT',
+          total_bytes: String(input.data.byteLength),
+          media_type: input.mimeType,
+          media_category: category,
+        });
+
+        const initResp = await this.fetchWithTimeout(TWITTER_UPLOAD_URL, {
+          method: 'POST',
+          headers: this.getUploadHeaders(),
+          body: initParams,
+        });
+
+        if (!initResp.ok) {
+          const text = await initResp.text();
+          return { success: false, error: `HTTP ${initResp.status}: ${text.slice(0, 200)}` };
+        }
+
+        const initBody = (await initResp.json()) as { media_id_string?: string; media_id?: string | number };
+        const mediaId =
+          typeof initBody.media_id_string === 'string'
+            ? initBody.media_id_string
+            : initBody.media_id !== undefined
+              ? String(initBody.media_id)
+              : undefined;
+        if (!mediaId) {
+          return { success: false, error: 'Media upload INIT did not return media_id' };
+        }
+
+        const chunkSize = 5 * 1024 * 1024;
+        let segmentIndex = 0;
+        for (let offset = 0; offset < input.data.byteLength; offset += chunkSize) {
+          const chunk = input.data.slice(offset, Math.min(input.data.byteLength, offset + chunkSize));
+          const form = new FormData();
+          form.set('command', 'APPEND');
+          form.set('media_id', mediaId);
+          form.set('segment_index', String(segmentIndex));
+          form.set('media', new Blob([chunk], { type: input.mimeType }), 'media');
+
+          const appendResp = await this.fetchWithTimeout(TWITTER_UPLOAD_URL, {
+            method: 'POST',
+            headers: this.getUploadHeaders(),
+            body: form,
+          });
+
+          if (!appendResp.ok) {
+            const text = await appendResp.text();
+            return { success: false, error: `HTTP ${appendResp.status}: ${text.slice(0, 200)}` };
+          }
+          segmentIndex += 1;
+        }
+
+        const finalizeParams = new URLSearchParams({ command: 'FINALIZE', media_id: mediaId });
+        const finalizeResp = await this.fetchWithTimeout(TWITTER_UPLOAD_URL, {
+          method: 'POST',
+          headers: this.getUploadHeaders(),
+          body: finalizeParams,
+        });
+
+        if (!finalizeResp.ok) {
+          const text = await finalizeResp.text();
+          return { success: false, error: `HTTP ${finalizeResp.status}: ${text.slice(0, 200)}` };
+        }
+
+        const finalizeBody = (await finalizeResp.json()) as {
+          processing_info?: {
+            state?: string;
+            check_after_secs?: number;
+            error?: { message?: string; name?: string };
+          };
+        };
+
+        const info = finalizeBody.processing_info;
+        if (info?.state && info.state !== 'succeeded') {
+          let attempts = 0;
+          while (attempts < 20) {
+            if (info.state === 'failed') {
+              const msg = info.error?.message || info.error?.name || 'Media processing failed';
+              return { success: false, error: msg };
+            }
+            const delaySecs = Number.isFinite(info.check_after_secs) ? Math.max(1, info.check_after_secs as number) : 2;
+            await this.sleep(delaySecs * 1000);
+
+            const statusUrl = `${TWITTER_UPLOAD_URL}?${new URLSearchParams({
+              command: 'STATUS',
+              media_id: mediaId,
+            }).toString()}`;
+            const statusResp = await this.fetchWithTimeout(statusUrl, {
+              method: 'GET',
+              headers: this.getUploadHeaders(),
+            });
+
+            if (!statusResp.ok) {
+              const text = await statusResp.text();
+              return { success: false, error: `HTTP ${statusResp.status}: ${text.slice(0, 200)}` };
+            }
+
+            const statusBody = (await statusResp.json()) as {
+              processing_info?: {
+                state?: string;
+                check_after_secs?: number;
+                error?: { message?: string; name?: string };
+              };
+            };
+            if (!statusBody.processing_info) {
+              break;
+            }
+            info.state = statusBody.processing_info.state;
+            info.check_after_secs = statusBody.processing_info.check_after_secs;
+            info.error = statusBody.processing_info.error;
+            if (info.state === 'succeeded') {
+              break;
+            }
+            attempts += 1;
+          }
+        }
+
+        if (input.alt && input.mimeType.startsWith('image/')) {
+          const metaResp = await this.fetchWithTimeout(TWITTER_MEDIA_METADATA_URL, {
+            method: 'POST',
+            headers: this.getJsonHeaders(),
+            body: JSON.stringify({ media_id: mediaId, alt_text: { text: input.alt } }),
+          });
+          if (!metaResp.ok) {
+            const text = await metaResp.text();
+            return { success: false, error: `HTTP ${metaResp.status}: ${text.slice(0, 200)}` };
+          }
+        }
+
+        return { success: true, mediaId };
+      } catch (error) {
+        return { success: false, error: error instanceof Error ? error.message : String(error) };
+      }
+    }
+  };
+}

src/lib/twitter-client-posting.ts

@@ -0,0 +1,277 @@
+import {
+  TWITTER_API_BASE,
+  TWITTER_GRAPHQL_POST_URL,
+  TWITTER_STATUS_UPDATE_URL,
+} from './twitter-client-constants.js';
+import { buildTweetCreateFeatures } from './twitter-client-features.js';
+import { type AbstractConstructor, type TwitterClientBase } from './twitter-client-base.js';
+import type { CreateTweetResponse, TweetResult } from './twitter-client-types.js';
+
+export function withPosting<TBase extends AbstractConstructor<TwitterClientBase>>(Base: TBase) {
+  return class extends Base {
+    /**
+     * Post a new tweet
+     */
+    async tweet(text: string, mediaIds?: string[]): Promise<TweetResult> {
+      const variables = {
+        tweet_text: text,
+        dark_request: false,
+        media: {
+          media_entities: (mediaIds ?? []).map((id) => ({ media_id: id, tagged_users: [] })),
+          possibly_sensitive: false,
+        },
+        semantic_annotation_ids: [],
+      };
+
+      const features = buildTweetCreateFeatures();
+
+      return this.createTweet(variables, features);
+    }
+
+    /**
+     * Reply to an existing tweet
+     */
+    async reply(text: string, replyToTweetId: string, mediaIds?: string[]): Promise<TweetResult> {
+      const variables = {
+        tweet_text: text,
+        reply: {
+          in_reply_to_tweet_id: replyToTweetId,
+          exclude_reply_user_ids: [],
+        },
+        dark_request: false,
+        media: {
+          media_entities: (mediaIds ?? []).map((id) => ({ media_id: id, tagged_users: [] })),
+          possibly_sensitive: false,
+        },
+        semantic_annotation_ids: [],
+      };
+
+      const features = buildTweetCreateFeatures();
+
+      return this.createTweet(variables, features);
+    }
+
+    private async createTweet(
+      variables: Record<string, unknown>,
+      features: Record<string, boolean>,
+    ): Promise<TweetResult> {
+      await this.ensureClientUserId();
+      let queryId = await this.getQueryId('CreateTweet');
+      let urlWithOperation = `${TWITTER_API_BASE}/${queryId}/CreateTweet`;
+
+      const buildBody = () => JSON.stringify({ variables, features, queryId });
+      let body = buildBody();
+
+      try {
+        const headers = { ...this.getHeaders(), referer: 'https://x.com/compose/post' };
+        let response = await this.fetchWithTimeout(urlWithOperation, {
+          method: 'POST',
+          headers,
+          body,
+        });
+
+        // Twitter increasingly prefers POST to /i/api/graphql with queryId in the payload.
+        // If the operation URL 404s, retry the generic endpoint.
+        if (response.status === 404) {
+          await this.refreshQueryIds();
+          queryId = await this.getQueryId('CreateTweet');
+          urlWithOperation = `${TWITTER_API_BASE}/${queryId}/CreateTweet`;
+          body = buildBody();
+
+          response = await this.fetchWithTimeout(urlWithOperation, {
+            method: 'POST',
+            headers: { ...this.getHeaders(), referer: 'https://x.com/compose/post' },
+            body,
+          });
+
+          if (response.status === 404) {
+            const retry = await this.fetchWithTimeout(TWITTER_GRAPHQL_POST_URL, {
+              method: 'POST',
+              headers: { ...this.getHeaders(), referer: 'https://x.com/compose/post' },
+              body,
+            });
+
+            if (!retry.ok) {
+              const text = await retry.text();
+              return { success: false, error: `HTTP ${retry.status}: ${text.slice(0, 200)}` };
+            }
+
+            const data = (await retry.json()) as CreateTweetResponse;
+
+            if (data.errors && data.errors.length > 0) {
+              const fallback = await this.tryStatusUpdateFallback(data.errors, variables);
+              if (fallback) {
+                return fallback;
+              }
+              return { success: false, error: this.formatErrors(data.errors) };
+            }
+
+            const tweetId = data.data?.create_tweet?.tweet_results?.result?.rest_id;
+            if (tweetId) {
+              return { success: true, tweetId };
+            }
+
+            return { success: false, error: 'Tweet created but no ID returned' };
+          }
+        }
+
+        if (!response.ok) {
+          const text = await response.text();
+          return {
+            success: false,
+            error: `HTTP ${response.status}: ${text.slice(0, 200)}`,
+          };
+        }
+
+        const data = (await response.json()) as CreateTweetResponse;
+
+        if (data.errors && data.errors.length > 0) {
+          const fallback = await this.tryStatusUpdateFallback(data.errors, variables);
+          if (fallback) {
+            return fallback;
+          }
+          return {
+            success: false,
+            error: this.formatErrors(data.errors),
+          };
+        }
+
+        const tweetId = data.data?.create_tweet?.tweet_results?.result?.rest_id;
+        if (tweetId) {
+          return {
+            success: true,
+            tweetId,
+          };
+        }
+
+        return {
+          success: false,
+          error: 'Tweet created but no ID returned',
+        };
+      } catch (error) {
+        return {
+          success: false,
+          error: error instanceof Error ? error.message : String(error),
+        };
+      }
+    }
+
+    private formatErrors(errors: Array<{ message: string; code?: number }>): string {
+      return errors
+        .map((error) => (typeof error.code === 'number' ? `${error.message} (${error.code})` : error.message))
+        .join(', ');
+    }
+
+    private statusUpdateInputFromCreateTweetVariables(variables: Record<string, unknown>): {
+      text: string;
+      inReplyToTweetId?: string;
+      mediaIds?: string[];
+    } | null {
+      const text = typeof variables.tweet_text === 'string' ? variables.tweet_text : null;
+      if (!text) {
+        return null;
+      }
+
+      const reply = variables.reply;
+      const inReplyToTweetId =
+        reply &&
+        typeof reply === 'object' &&
+        typeof (reply as { in_reply_to_tweet_id?: unknown }).in_reply_to_tweet_id === 'string'
+          ? (reply as { in_reply_to_tweet_id: string }).in_reply_to_tweet_id
+          : undefined;
+
+      const media = variables.media;
+      const mediaEntities =
+        media && typeof media === 'object' ? (media as { media_entities?: unknown }).media_entities : undefined;
+
+      const mediaIds = Array.isArray(mediaEntities)
+        ? mediaEntities
+            .map((entity) =>
+              entity && typeof entity === 'object' && 'media_id' in (entity as Record<string, unknown>)
+                ? (entity as { media_id?: unknown }).media_id
+                : undefined,
+            )
+            .filter((value): value is string | number => typeof value === 'string' || typeof value === 'number')
+            .map((value) => String(value))
+        : undefined;
+
+      return { text, inReplyToTweetId, mediaIds: mediaIds && mediaIds.length > 0 ? mediaIds : undefined };
+    }
+
+    private async postStatusUpdate(input: {
+      text: string;
+      inReplyToTweetId?: string;
+      mediaIds?: string[];
+    }): Promise<TweetResult> {
+      const params = new URLSearchParams();
+      params.set('status', input.text);
+      if (input.inReplyToTweetId) {
+        params.set('in_reply_to_status_id', input.inReplyToTweetId);
+        params.set('auto_populate_reply_metadata', 'true');
+      }
+      if (input.mediaIds && input.mediaIds.length > 0) {
+        params.set('media_ids', input.mediaIds.join(','));
+      }
+
+      try {
+        const response = await this.fetchWithTimeout(TWITTER_STATUS_UPDATE_URL, {
+          method: 'POST',
+          headers: {
+            ...this.getBaseHeaders(),
+            'content-type': 'application/x-www-form-urlencoded',
+            referer: 'https://x.com/compose/post',
+          },
+          body: params.toString(),
+        });
+
+        if (!response.ok) {
+          const text = await response.text();
+          return { success: false, error: `HTTP ${response.status}: ${text.slice(0, 200)}` };
+        }
+
+        const data = (await response.json()) as {
+          id_str?: string;
+          id?: string | number;
+          errors?: Array<{ message: string; code?: number }>;
+        };
+
+        if (data.errors && data.errors.length > 0) {
+          return { success: false, error: this.formatErrors(data.errors) };
+        }
+
+        const tweetId =
+          typeof data.id_str === 'string' ? data.id_str : data.id !== undefined ? String(data.id) : undefined;
+
+        if (tweetId) {
+          return { success: true, tweetId };
+        }
+        return { success: false, error: 'Tweet created but no ID returned' };
+      } catch (error) {
+        return { success: false, error: error instanceof Error ? error.message : String(error) };
+      }
+    }
+
+    private async tryStatusUpdateFallback(
+      errors: Array<{ message: string; code?: number }>,
+      variables: Record<string, unknown>,
+    ): Promise<TweetResult | null> {
+      if (!errors.some((error) => error.code === 226)) {
+        return null;
+      }
+      const input = this.statusUpdateInputFromCreateTweetVariables(variables);
+      if (!input) {
+        return null;
+      }
+
+      const fallback = await this.postStatusUpdate(input);
+      if (fallback.success) {
+        return fallback;
+      }
+
+      return {
+        success: false,
+        error: `${this.formatErrors(errors)} | fallback: ${fallback.error ?? 'Unknown error'}`,
+      };
+    }
+  };
+}

src/lib/twitter-client-search.ts

@@ -0,0 +1,160 @@
+import { TWITTER_API_BASE } from './twitter-client-constants.js';
+import { buildSearchFeatures } from './twitter-client-features.js';
+import { type AbstractConstructor, type TwitterClientBase } from './twitter-client-base.js';
+import type { SearchResult, TweetData } from './twitter-client-types.js';
+import { extractCursorFromInstructions, parseTweetsFromInstructions } from './twitter-client-utils.js';
+
+export function withSearch<TBase extends AbstractConstructor<TwitterClientBase>>(Base: TBase) {
+  return class extends Base {
+    /**
+     * Search for tweets matching a query
+     */
+    async search(query: string, count = 20): Promise<SearchResult> {
+      const features = buildSearchFeatures();
+      const pageSize = 20;
+      const seen = new Set<string>();
+      const tweets: TweetData[] = [];
+      let cursor: string | undefined;
+
+      const fetchPage = async (pageCount: number, pageCursor?: string) => {
+        let lastError: string | undefined;
+        let had404 = false;
+        const queryIds = await this.getSearchTimelineQueryIds();
+
+        for (const queryId of queryIds) {
+          const variables = {
+            rawQuery: query,
+            count: pageCount,
+            querySource: 'typed_query',
+            product: 'Latest',
+            ...(pageCursor ? { cursor: pageCursor } : {}),
+          };
+
+          const params = new URLSearchParams({
+            variables: JSON.stringify(variables),
+          });
+
+          const url = `${TWITTER_API_BASE}/${queryId}/SearchTimeline?${params.toString()}`;
+
+          try {
+            const response = await this.fetchWithTimeout(url, {
+              method: 'POST',
+              headers: this.getHeaders(),
+              body: JSON.stringify({ features, queryId }),
+            });
+
+            if (response.status === 404) {
+              had404 = true;
+              lastError = `HTTP ${response.status}`;
+              continue;
+            }
+
+            if (!response.ok) {
+              const text = await response.text();
+              return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}`, had404 };
+            }
+
+            const data = (await response.json()) as {
+              data?: {
+                search_by_raw_query?: {
+                  search_timeline?: {
+                    timeline?: {
+                      instructions?: Array<{
+                        entries?: Array<{
+                          content?: {
+                            itemContent?: {
+                              tweet_results?: {
+                                result?: {
+                                  rest_id?: string;
+                                  legacy?: {
+                                    full_text?: string;
+                                    created_at?: string;
+                                    reply_count?: number;
+                                    retweet_count?: number;
+                                    favorite_count?: number;
+                                    in_reply_to_status_id_str?: string;
+                                  };
+                                  core?: {
+                                    user_results?: {
+                                      result?: {
+                                        legacy?: {
+                                          screen_name?: string;
+                                          name?: string;
+                                        };
+                                      };
+                                    };
+                                  };
+                                };
+                              };
+                            };
+                          };
+                        }>;
+                      }>;
+                    };
+                  };
+                };
+              };
+              errors?: Array<{ message: string }>;
+            };
+
+            if (data.errors && data.errors.length > 0) {
+              return { success: false as const, error: data.errors.map((e) => e.message).join(', '), had404 };
+            }
+
+            const instructions = data.data?.search_by_raw_query?.search_timeline?.timeline?.instructions;
+            const pageTweets = parseTweetsFromInstructions(instructions, this.quoteDepth);
+            const nextCursor = extractCursorFromInstructions(instructions);
+
+            return { success: true as const, tweets: pageTweets, cursor: nextCursor, had404 };
+          } catch (error) {
+            lastError = error instanceof Error ? error.message : String(error);
+          }
+        }
+
+        return { success: false as const, error: lastError ?? 'Unknown error fetching search results', had404 };
+      };
+
+      const fetchWithRefresh = async (pageCount: number, pageCursor?: string) => {
+        const firstAttempt = await fetchPage(pageCount, pageCursor);
+        if (firstAttempt.success) {
+          return firstAttempt;
+        }
+        if (firstAttempt.had404) {
+          await this.refreshQueryIds();
+          const secondAttempt = await fetchPage(pageCount, pageCursor);
+          if (secondAttempt.success) {
+            return secondAttempt;
+          }
+          return { success: false as const, error: secondAttempt.error };
+        }
+        return { success: false as const, error: firstAttempt.error };
+      };
+
+      while (tweets.length < count) {
+        const pageCount = Math.min(pageSize, count - tweets.length);
+        const page = await fetchWithRefresh(pageCount, cursor);
+        if (!page.success) {
+          return { success: false, error: page.error };
+        }
+
+        for (const tweet of page.tweets) {
+          if (seen.has(tweet.id)) {
+            continue;
+          }
+          seen.add(tweet.id);
+          tweets.push(tweet);
+          if (tweets.length >= count) {
+            break;
+          }
+        }
+
+        if (!page.cursor || page.cursor === cursor || page.tweets.length === 0) {
+          break;
+        }
+        cursor = page.cursor;
+      }
+
+      return { success: true, tweets };
+    }
+  };
+}

src/lib/twitter-client-timelines.ts

@@ -0,0 +1,337 @@
+import { TWITTER_API_BASE } from './twitter-client-constants.js';
+import { buildBookmarksFeatures, buildLikesFeatures } from './twitter-client-features.js';
+import { type AbstractConstructor, type TwitterClientBase } from './twitter-client-base.js';
+import type { SearchResult } from './twitter-client-types.js';
+import { parseTweetsFromInstructions } from './twitter-client-utils.js';
+
+export function withTimelines<TBase extends AbstractConstructor<TwitterClientBase>>(Base: TBase) {
+  return class extends Base {
+    private async getBookmarksQueryIds(): Promise<string[]> {
+      const primary = await this.getQueryId('Bookmarks');
+      return Array.from(new Set([primary, 'RV1g3b8n_SGOHwkqKYSCFw', 'tmd4ifV8RHltzn8ymGg1aw']));
+    }
+
+    private async getBookmarkFolderQueryIds(): Promise<string[]> {
+      const primary = await this.getQueryId('BookmarkFolderTimeline');
+      return Array.from(new Set([primary, 'KJIQpsvxrTfRIlbaRIySHQ']));
+    }
+
+    private async getLikesQueryIds(): Promise<string[]> {
+      const primary = await this.getQueryId('Likes');
+      return Array.from(new Set([primary, 'JR2gceKucIKcVNB_9JkhsA']));
+    }
+
+    /**
+     * Get the authenticated user's bookmarks
+     */
+    async getBookmarks(count = 20): Promise<SearchResult> {
+      const variables = {
+        count,
+        includePromotedContent: false,
+        withDownvotePerspective: false,
+        withReactionsMetadata: false,
+        withReactionsPerspective: false,
+      };
+
+      const features = buildBookmarksFeatures();
+
+      const params = new URLSearchParams({
+        variables: JSON.stringify(variables),
+        features: JSON.stringify(features),
+      });
+
+      const tryOnce = async () => {
+        let lastError: string | undefined;
+        let had404 = false;
+        const queryIds = await this.getBookmarksQueryIds();
+
+        for (const queryId of queryIds) {
+          const url = `${TWITTER_API_BASE}/${queryId}/Bookmarks?${params.toString()}`;
+
+          try {
+            const response = await this.fetchWithTimeout(url, {
+              method: 'GET',
+              headers: this.getHeaders(),
+            });
+
+            if (response.status === 404) {
+              had404 = true;
+              lastError = `HTTP ${response.status}`;
+              continue;
+            }
+
+            if (!response.ok) {
+              const text = await response.text();
+              return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}`, had404 };
+            }
+
+            const data = (await response.json()) as {
+              data?: {
+                bookmark_timeline_v2?: {
+                  timeline?: {
+                    instructions?: Array<{
+                      entries?: Array<{
+                        content?: {
+                          itemContent?: {
+                            tweet_results?: {
+                              result?: unknown;
+                            };
+                          };
+                        };
+                      }>;
+                    }>;
+                  };
+                };
+              };
+              errors?: Array<{ message: string }>;
+            };
+
+            if (data.errors && data.errors.length > 0) {
+              return { success: false as const, error: data.errors.map((e) => e.message).join(', '), had404 };
+            }
+
+            const instructions = data.data?.bookmark_timeline_v2?.timeline?.instructions;
+            const tweets = parseTweetsFromInstructions(instructions, this.quoteDepth);
+
+            return { success: true as const, tweets, had404 };
+          } catch (error) {
+            lastError = error instanceof Error ? error.message : String(error);
+          }
+        }
+
+        return { success: false as const, error: lastError ?? 'Unknown error fetching bookmarks', had404 };
+      };
+
+      const firstAttempt = await tryOnce();
+      if (firstAttempt.success) {
+        return { success: true, tweets: firstAttempt.tweets };
+      }
+
+      if (firstAttempt.had404) {
+        await this.refreshQueryIds();
+        const secondAttempt = await tryOnce();
+        if (secondAttempt.success) {
+          return { success: true, tweets: secondAttempt.tweets };
+        }
+        return { success: false, error: secondAttempt.error };
+      }
+
+      return { success: false, error: firstAttempt.error };
+    }
+
+    /**
+     * Get the authenticated user's liked tweets
+     */
+    async getLikes(count = 20): Promise<SearchResult> {
+      const userResult = await this.getCurrentUser();
+      if (!userResult.success || !userResult.user) {
+        return { success: false, error: userResult.error ?? 'Could not determine current user' };
+      }
+
+      const variables = {
+        userId: userResult.user.id,
+        count,
+        includePromotedContent: false,
+        withClientEventToken: false,
+        withBirdwatchNotes: false,
+        withVoice: true,
+      };
+
+      const features = buildLikesFeatures();
+
+      const params = new URLSearchParams({
+        variables: JSON.stringify(variables),
+        features: JSON.stringify(features),
+      });
+
+      const tryOnce = async () => {
+        let lastError: string | undefined;
+        let had404 = false;
+        const queryIds = await this.getLikesQueryIds();
+
+        for (const queryId of queryIds) {
+          const url = `${TWITTER_API_BASE}/${queryId}/Likes?${params.toString()}`;
+
+          try {
+            const response = await this.fetchWithTimeout(url, {
+              method: 'GET',
+              headers: this.getHeaders(),
+            });
+
+            if (response.status === 404) {
+              had404 = true;
+              lastError = `HTTP ${response.status}`;
+              continue;
+            }
+
+            if (!response.ok) {
+              const text = await response.text();
+              return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}`, had404 };
+            }
+
+            const data = (await response.json()) as {
+              data?: {
+                user?: {
+                  result?: {
+                    timeline?: {
+                      timeline?: {
+                        instructions?: Array<{
+                          entries?: Array<{
+                            content?: {
+                              itemContent?: {
+                                tweet_results?: {
+                                  result?: unknown;
+                                };
+                              };
+                            };
+                          }>;
+                        }>;
+                      };
+                    };
+                  };
+                };
+              };
+              errors?: Array<{ message: string }>;
+            };
+
+            if (data.errors && data.errors.length > 0) {
+              return { success: false as const, error: data.errors.map((e) => e.message).join(', '), had404 };
+            }
+
+            const instructions = data.data?.user?.result?.timeline?.timeline?.instructions;
+            const tweets = parseTweetsFromInstructions(instructions, this.quoteDepth);
+
+            return { success: true as const, tweets, had404 };
+          } catch (error) {
+            lastError = error instanceof Error ? error.message : String(error);
+          }
+        }
+
+        return { success: false as const, error: lastError ?? 'Unknown error fetching likes', had404 };
+      };
+
+      const firstAttempt = await tryOnce();
+      if (firstAttempt.success) {
+        return { success: true, tweets: firstAttempt.tweets };
+      }
+
+      if (firstAttempt.had404) {
+        await this.refreshQueryIds();
+        const secondAttempt = await tryOnce();
+        if (secondAttempt.success) {
+          return { success: true, tweets: secondAttempt.tweets };
+        }
+        return { success: false, error: secondAttempt.error };
+      }
+
+      return { success: false, error: firstAttempt.error };
+    }
+
+    /**
+     * Get the authenticated user's bookmark folder timeline
+     */
+    async getBookmarkFolderTimeline(folderId: string, count = 20): Promise<SearchResult> {
+      const variablesWithCount = {
+        bookmark_collection_id: folderId,
+        includePromotedContent: true,
+        count,
+      };
+
+      const variablesWithoutCount = {
+        bookmark_collection_id: folderId,
+        includePromotedContent: true,
+      };
+
+      const features = buildBookmarksFeatures();
+
+      const tryOnce = async (variables: Record<string, unknown>) => {
+        let lastError: string | undefined;
+        let had404 = false;
+        const queryIds = await this.getBookmarkFolderQueryIds();
+
+        const params = new URLSearchParams({
+          variables: JSON.stringify(variables),
+          features: JSON.stringify(features),
+        });
+
+        for (const queryId of queryIds) {
+          const url = `${TWITTER_API_BASE}/${queryId}/BookmarkFolderTimeline?${params.toString()}`;
+
+          try {
+            const response = await this.fetchWithTimeout(url, {
+              method: 'GET',
+              headers: this.getHeaders(),
+            });
+
+            if (response.status === 404) {
+              had404 = true;
+              lastError = `HTTP ${response.status}`;
+              continue;
+            }
+
+            if (!response.ok) {
+              const text = await response.text();
+              return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}`, had404 };
+            }
+
+            const data = (await response.json()) as {
+              data?: {
+                bookmark_collection_timeline?: {
+                  timeline?: {
+                    instructions?: Array<{
+                      entries?: Array<{
+                        content?: {
+                          itemContent?: {
+                            tweet_results?: {
+                              result?: unknown;
+                            };
+                          };
+                        };
+                      }>;
+                    }>;
+                  };
+                };
+              };
+              errors?: Array<{ message: string }>;
+            };
+
+            if (data.errors && data.errors.length > 0) {
+              return { success: false as const, error: data.errors.map((e) => e.message).join(', '), had404 };
+            }
+
+            const instructions = data.data?.bookmark_collection_timeline?.timeline?.instructions;
+            const tweets = parseTweetsFromInstructions(instructions, this.quoteDepth);
+
+            return { success: true as const, tweets, had404 };
+          } catch (error) {
+            lastError = error instanceof Error ? error.message : String(error);
+          }
+        }
+
+        return { success: false as const, error: lastError ?? 'Unknown error fetching bookmark folder', had404 };
+      };
+
+      let firstAttempt = await tryOnce(variablesWithCount);
+      if (!firstAttempt.success && firstAttempt.error?.includes('Variable "$count"')) {
+        firstAttempt = await tryOnce(variablesWithoutCount);
+      }
+      if (firstAttempt.success) {
+        return { success: true, tweets: firstAttempt.tweets };
+      }
+
+      if (firstAttempt.had404) {
+        await this.refreshQueryIds();
+        let secondAttempt = await tryOnce(variablesWithCount);
+        if (!secondAttempt.success && secondAttempt.error?.includes('Variable "$count"')) {
+          secondAttempt = await tryOnce(variablesWithoutCount);
+        }
+        if (secondAttempt.success) {
+          return { success: true, tweets: secondAttempt.tweets };
+        }
+        return { success: false, error: secondAttempt.error };
+      }
+
+      return { success: false, error: firstAttempt.error };
+    }
+  };
+}

src/lib/twitter-client-tweet-detail.ts

@@ -0,0 +1,322 @@
+import { TWITTER_API_BASE } from './twitter-client-constants.js';
+import { buildArticleFeatures, buildArticleFieldToggles, buildTweetDetailFeatures } from './twitter-client-features.js';
+import { type AbstractConstructor, type TwitterClientBase } from './twitter-client-base.js';
+import type { GetTweetResult, GraphqlTweetResult, SearchResult } from './twitter-client-types.js';
+import {
+  extractArticleText,
+  findTweetInInstructions,
+  firstText,
+  mapTweetResult,
+  parseTweetsFromInstructions,
+} from './twitter-client-utils.js';
+
+export function withTweetDetails<TBase extends AbstractConstructor<TwitterClientBase>>(Base: TBase) {
+  return class extends Base {
+    private async fetchUserArticlePlainText(
+      userId: string,
+      tweetId: string,
+    ): Promise<{ title?: string; plainText?: string }> {
+      const variables = {
+        userId,
+        count: 20,
+        includePromotedContent: true,
+        withVoice: true,
+        withQuickPromoteEligibilityTweetFields: true,
+        withBirdwatchNotes: true,
+        withCommunity: true,
+        withSafetyModeUserFields: true,
+        withSuperFollowsUserFields: true,
+        withDownvotePerspective: false,
+        withReactionsMetadata: false,
+        withReactionsPerspective: false,
+        withSuperFollowsTweetFields: true,
+        withSuperFollowsReplyCount: false,
+        withClientEventToken: false,
+      };
+
+      const params = new URLSearchParams({
+        variables: JSON.stringify(variables),
+        features: JSON.stringify(buildArticleFeatures()),
+        fieldToggles: JSON.stringify(buildArticleFieldToggles()),
+      });
+
+      const queryId = await this.getQueryId('UserArticlesTweets');
+      const url = `${TWITTER_API_BASE}/${queryId}/UserArticlesTweets?${params.toString()}`;
+
+      try {
+        const response = await this.fetchWithTimeout(url, { method: 'GET', headers: this.getHeaders() });
+        if (!response.ok) {
+          return {};
+        }
+
+        const data = (await response.json()) as {
+          data?: {
+            user?: {
+              result?: {
+                timeline?: {
+                  timeline?: {
+                    instructions?: Array<{
+                      entries?: Array<{
+                        content?: {
+                          itemContent?: {
+                            tweet_results?: { result?: GraphqlTweetResult };
+                          };
+                        };
+                      }>;
+                    }>;
+                  };
+                };
+              };
+            };
+          };
+        };
+
+        const instructions = data.data?.user?.result?.timeline?.timeline?.instructions ?? [];
+        for (const instruction of instructions) {
+          for (const entry of instruction.entries ?? []) {
+            const result = entry.content?.itemContent?.tweet_results?.result;
+            if (result?.rest_id !== tweetId) {
+              continue;
+            }
+            const articleResult = result.article?.article_results?.result;
+            const title = firstText(articleResult?.title, result.article?.title);
+            const plainText = firstText(articleResult?.plain_text, result.article?.plain_text);
+            return { title, plainText };
+          }
+        }
+      } catch {
+        return {};
+      }
+
+      return {};
+    }
+
+    private async fetchTweetDetail(tweetId: string): Promise<
+      | {
+          success: true;
+          data: {
+            tweetResult?: { result?: GraphqlTweetResult };
+            threaded_conversation_with_injections_v2?: {
+              instructions?: Array<{
+                entries?: Array<{
+                  content?: {
+                    itemContent?: {
+                      tweet_results?: {
+                        result?: GraphqlTweetResult;
+                      };
+                    };
+                  };
+                }>;
+              }>;
+            };
+          };
+        }
+      | { success: false; error: string }
+    > {
+      const variables = {
+        focalTweetId: tweetId,
+        with_rux_injections: false,
+        rankingMode: 'Relevance',
+        includePromotedContent: true,
+        withCommunity: true,
+        withQuickPromoteEligibilityTweetFields: true,
+        withBirdwatchNotes: true,
+        withVoice: true,
+      };
+
+      const features = {
+        ...buildTweetDetailFeatures(),
+        articles_preview_enabled: true,
+        articles_rest_api_enabled: true,
+        responsive_web_graphql_skip_user_profile_image_extensions_enabled: false,
+        creator_subscriptions_tweet_preview_api_enabled: true,
+        graphql_is_translatable_rweb_tweet_is_translatable_enabled: true,
+        view_counts_everywhere_api_enabled: true,
+        longform_notetweets_consumption_enabled: true,
+        responsive_web_twitter_article_tweet_consumption_enabled: true,
+        freedom_of_speech_not_reach_fetch_enabled: true,
+        standardized_nudges_misinfo: true,
+        tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled: true,
+        rweb_video_timestamps_enabled: true,
+      };
+
+      const params = new URLSearchParams({
+        variables: JSON.stringify(variables),
+        features: JSON.stringify(features),
+      });
+
+      try {
+        const parseResponse = async (response: Response) => {
+          if (!response.ok) {
+            const text = await response.text();
+            return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}` };
+          }
+
+          const data = (await response.json()) as {
+            data?: {
+              tweetResult?: { result?: GraphqlTweetResult };
+              threaded_conversation_with_injections_v2?: {
+                instructions?: Array<{
+                  entries?: Array<{
+                    content?: {
+                      itemContent?: {
+                        tweet_results?: {
+                          result?: GraphqlTweetResult;
+                        };
+                      };
+                    };
+                  }>;
+                }>;
+              };
+            };
+            errors?: Array<{ message: string; code?: number }>;
+          };
+
+          if (data.errors && data.errors.length > 0) {
+            return { success: false as const, error: data.errors.map((e) => e.message).join(', ') };
+          }
+
+          return { success: true as const, data: data.data ?? {} };
+        };
+
+        let lastError: string | undefined;
+        let had404 = false;
+
+        const tryOnce = async () => {
+          const queryIds = await this.getTweetDetailQueryIds();
+
+          for (const queryId of queryIds) {
+            const url = `${TWITTER_API_BASE}/${queryId}/TweetDetail?${params.toString()}`;
+            const response = await this.fetchWithTimeout(url, {
+              method: 'GET',
+              headers: this.getHeaders(),
+            });
+
+            if (response.status !== 404) {
+              return await parseResponse(response);
+            }
+
+            had404 = true;
+
+            const postResponse = await this.fetchWithTimeout(`${TWITTER_API_BASE}/${queryId}/TweetDetail`, {
+              method: 'POST',
+              headers: this.getHeaders(),
+              body: JSON.stringify({ variables, features, queryId }),
+            });
+
+            if (postResponse.status !== 404) {
+              return await parseResponse(postResponse);
+            }
+
+            lastError = 'HTTP 404';
+          }
+
+          return { success: false as const, error: lastError ?? 'Unknown error fetching tweet detail' };
+        };
+
+        const firstAttempt = await tryOnce();
+        if (firstAttempt.success) {
+          return firstAttempt;
+        }
+
+        if (had404) {
+          await this.refreshQueryIds();
+          return await tryOnce();
+        }
+
+        return firstAttempt;
+      } catch (error) {
+        return { success: false, error: error instanceof Error ? error.message : String(error) };
+      }
+    }
+
+    /**
+     * Get tweet details by ID
+     */
+    async getTweet(tweetId: string): Promise<GetTweetResult> {
+      const response = await this.fetchTweetDetail(tweetId);
+      if (!response.success) {
+        return response;
+      }
+
+      const tweetResult =
+        (response.data.tweetResult as { result?: GraphqlTweetResult } | undefined)?.result ??
+        findTweetInInstructions(
+          response.data.threaded_conversation_with_injections_v2?.instructions as
+            | Array<{
+                entries?: Array<{
+                  content?: {
+                    itemContent?: {
+                      tweet_results?: {
+                        result?: GraphqlTweetResult;
+                      };
+                    };
+                  };
+                }>;
+              }>
+            | undefined,
+          tweetId,
+        );
+
+      const mapped = mapTweetResult(tweetResult, this.quoteDepth);
+      if (mapped) {
+        if (tweetResult?.article) {
+          const title = firstText(tweetResult.article.article_results?.result?.title, tweetResult.article.title);
+          const articleText = extractArticleText(tweetResult);
+          if (title && (!articleText || articleText.trim() === title.trim())) {
+            const userId = tweetResult.core?.user_results?.result?.rest_id;
+            if (userId) {
+              const fallback = await this.fetchUserArticlePlainText(userId, tweetId);
+              if (fallback.plainText) {
+                mapped.text = fallback.title ? `${fallback.title}\n\n${fallback.plainText}` : fallback.plainText;
+              }
+            }
+          }
+        }
+        return { success: true, tweet: mapped };
+      }
+      return { success: false, error: 'Tweet not found in response' };
+    }
+
+    /**
+     * Get replies to a tweet by ID
+     */
+    async getReplies(tweetId: string): Promise<SearchResult> {
+      const response = await this.fetchTweetDetail(tweetId);
+      if (!response.success) {
+        return response;
+      }
+
+      const instructions = response.data.threaded_conversation_with_injections_v2?.instructions;
+      const tweets = parseTweetsFromInstructions(instructions, this.quoteDepth);
+      const replies = tweets.filter((tweet) => tweet.inReplyToStatusId === tweetId);
+
+      return { success: true, tweets: replies };
+    }
+
+    /**
+     * Get full conversation thread for a tweet ID
+     */
+    async getThread(tweetId: string): Promise<SearchResult> {
+      const response = await this.fetchTweetDetail(tweetId);
+      if (!response.success) {
+        return response;
+      }
+
+      const instructions = response.data.threaded_conversation_with_injections_v2?.instructions;
+      const tweets = parseTweetsFromInstructions(instructions, this.quoteDepth);
+
+      const target = tweets.find((t) => t.id === tweetId);
+      const rootId = target?.conversationId || tweetId;
+      const thread = tweets.filter((tweet) => tweet.conversationId === rootId);
+
+      thread.sort((a, b) => {
+        const aTime = a.createdAt ? Date.parse(a.createdAt) : 0;
+        const bTime = b.createdAt ? Date.parse(b.createdAt) : 0;
+        return aTime - bTime;
+      });
+
+      return { success: true, tweets: thread };
+    }
+  };
+}

src/lib/twitter-client-types.ts

@@ -0,0 +1,251 @@
+import type { TwitterCookies } from './cookies.js';
+
+export type GraphqlTweetResult = {
+  __typename?: string;
+  rest_id?: string;
+  legacy?: {
+    full_text?: string;
+    created_at?: string;
+    reply_count?: number;
+    retweet_count?: number;
+    favorite_count?: number;
+    conversation_id_str?: string;
+    in_reply_to_status_id_str?: string | null;
+  };
+  core?: {
+    user_results?: {
+      result?: {
+        rest_id?: string;
+        id?: string;
+        legacy?: {
+          screen_name?: string;
+          name?: string;
+        };
+        core?: {
+          screen_name?: string;
+          name?: string;
+        };
+      };
+    };
+  };
+  note_tweet?: {
+    note_tweet_results?: {
+      result?: {
+        text?: string;
+        richtext?: {
+          text?: string;
+        };
+        rich_text?: {
+          text?: string;
+        };
+        content?: {
+          text?: string;
+          richtext?: {
+            text?: string;
+          };
+          rich_text?: {
+            text?: string;
+          };
+        };
+      };
+    };
+  };
+  article?: {
+    article_results?: {
+      result?: {
+        title?: string;
+        plain_text?: string;
+        text?: string;
+        richtext?: {
+          text?: string;
+        };
+        rich_text?: {
+          text?: string;
+        };
+        body?: {
+          text?: string;
+          richtext?: {
+            text?: string;
+          };
+          rich_text?: {
+            text?: string;
+          };
+        };
+        content?: {
+          text?: string;
+          richtext?: {
+            text?: string;
+          };
+          rich_text?: {
+            text?: string;
+          };
+          items?: Array<{
+            text?: string;
+            content?: {
+              text?: string;
+              richtext?: { text?: string };
+              rich_text?: { text?: string };
+            };
+          }>;
+        };
+        sections?: Array<{
+          items?: Array<{
+            text?: string;
+            content?: {
+              text?: string;
+              richtext?: { text?: string };
+              rich_text?: { text?: string };
+            };
+          }>;
+        }>;
+      };
+    };
+    title?: string;
+    plain_text?: string;
+    text?: string;
+    richtext?: {
+      text?: string;
+    };
+    rich_text?: {
+      text?: string;
+    };
+    body?: {
+      text?: string;
+      richtext?: {
+        text?: string;
+      };
+      rich_text?: {
+        text?: string;
+      };
+    };
+    content?: {
+      text?: string;
+      richtext?: {
+        text?: string;
+      };
+      rich_text?: {
+        text?: string;
+      };
+      items?: Array<{
+        text?: string;
+        content?: {
+          text?: string;
+          richtext?: { text?: string };
+          rich_text?: { text?: string };
+        };
+      }>;
+    };
+    sections?: Array<{
+      items?: Array<{
+        text?: string;
+        content?: {
+          text?: string;
+          richtext?: { text?: string };
+          rich_text?: { text?: string };
+        };
+      }>;
+    }>;
+  };
+  tweet?: GraphqlTweetResult;
+  quoted_status_result?: {
+    result?: GraphqlTweetResult;
+  };
+};
+
+export type TweetResult =
+  | {
+      success: true;
+      tweetId: string;
+    }
+  | {
+      success: false;
+      error: string;
+    };
+
+export interface UploadMediaResult {
+  success: boolean;
+  mediaId?: string;
+  error?: string;
+}
+
+export interface TweetData {
+  id: string;
+  text: string;
+  author: {
+    username: string;
+    name: string;
+  };
+  authorId?: string;
+  createdAt?: string;
+  replyCount?: number;
+  retweetCount?: number;
+  likeCount?: number;
+  conversationId?: string;
+  inReplyToStatusId?: string;
+  // Optional quoted tweet; depth controlled by quoteDepth (default: 1).
+  quotedTweet?: TweetData;
+}
+
+export interface GetTweetResult {
+  success: boolean;
+  tweet?: TweetData;
+  error?: string;
+}
+
+export interface SearchResult {
+  success: boolean;
+  tweets?: TweetData[];
+  error?: string;
+}
+
+export interface CurrentUserResult {
+  success: boolean;
+  user?: {
+    id: string;
+    username: string;
+    name: string;
+  };
+  error?: string;
+}
+
+export interface TwitterUser {
+  id: string;
+  username: string;
+  name: string;
+  description?: string;
+  followersCount?: number;
+  followingCount?: number;
+  isBlueVerified?: boolean;
+  profileImageUrl?: string;
+  createdAt?: string;
+}
+
+export interface FollowingResult {
+  success: boolean;
+  users?: TwitterUser[];
+  error?: string;
+}
+
+export interface TwitterClientOptions {
+  cookies: TwitterCookies;
+  userAgent?: string;
+  timeoutMs?: number;
+  // Max depth for quoted tweets (0 disables). Defaults to 1.
+  quoteDepth?: number;
+}
+
+export interface CreateTweetResponse {
+  data?: {
+    create_tweet?: {
+      tweet_results?: {
+        result?: {
+          rest_id?: string;
+          legacy?: {
+            full_text?: string;
+          };
+        };
+      };
+    };
+  };
+  errors?: Array<{ message: string; code?: number }>;
+}

src/lib/twitter-client-users.ts

@@ -0,0 +1,330 @@
+import {
+  SETTINGS_NAME_REGEX,
+  SETTINGS_SCREEN_NAME_REGEX,
+  SETTINGS_USER_ID_REGEX,
+  TWITTER_API_BASE,
+} from './twitter-client-constants.js';
+import { buildFollowingFeatures } from './twitter-client-features.js';
+import { type AbstractConstructor, type TwitterClientBase } from './twitter-client-base.js';
+import type { CurrentUserResult, FollowingResult } from './twitter-client-types.js';
+import { parseUsersFromInstructions } from './twitter-client-utils.js';
+
+export function withUsers<TBase extends AbstractConstructor<TwitterClientBase>>(Base: TBase) {
+  return class extends Base {
+    private async getFollowingQueryIds(): Promise<string[]> {
+      const primary = await this.getQueryId('Following');
+      return Array.from(new Set([primary, 'BEkNpEt5pNETESoqMsTEGA']));
+    }
+
+    private async getFollowersQueryIds(): Promise<string[]> {
+      const primary = await this.getQueryId('Followers');
+      return Array.from(new Set([primary, 'kuFUYP9eV1FPoEy4N-pi7w']));
+    }
+
+    /**
+     * Fetch the account associated with the current cookies
+     */
+    async getCurrentUser(): Promise<CurrentUserResult> {
+      const candidateUrls = [
+        'https://x.com/i/api/account/settings.json',
+        'https://api.twitter.com/1.1/account/settings.json',
+        'https://x.com/i/api/account/verify_credentials.json?skip_status=true&include_entities=false',
+        'https://api.twitter.com/1.1/account/verify_credentials.json?skip_status=true&include_entities=false',
+      ];
+
+      let lastError: string | undefined;
+
+      for (const url of candidateUrls) {
+        try {
+          const response = await this.fetchWithTimeout(url, {
+            method: 'GET',
+            headers: this.getHeaders(),
+          });
+
+          if (!response.ok) {
+            const text = await response.text();
+            lastError = `HTTP ${response.status}: ${text.slice(0, 200)}`;
+            continue;
+          }
+
+          // biome-ignore lint/suspicious/noExplicitAny: Twitter API response is dynamic here
+          let data: any;
+          try {
+            data = await response.json();
+          } catch (error) {
+            lastError = error instanceof Error ? error.message : String(error);
+            continue;
+          }
+
+          const username =
+            typeof data?.screen_name === 'string'
+              ? data.screen_name
+              : typeof data?.user?.screen_name === 'string'
+                ? data.user.screen_name
+                : null;
+
+          const name =
+            typeof data?.name === 'string'
+              ? data.name
+              : typeof data?.user?.name === 'string'
+                ? data.user.name
+                : (username ?? '');
+
+          const userId =
+            typeof data?.user_id === 'string'
+              ? data.user_id
+              : typeof data?.user_id_str === 'string'
+                ? data.user_id_str
+                : typeof data?.user?.id_str === 'string'
+                  ? data.user.id_str
+                  : typeof data?.user?.id === 'string'
+                    ? data.user.id
+                    : null;
+
+          if (username && userId) {
+            this.clientUserId = userId;
+            return {
+              success: true,
+              user: {
+                id: userId,
+                username,
+                name: name || username,
+              },
+            };
+          }
+
+          lastError = 'Could not determine current user from response';
+        } catch (error) {
+          lastError = error instanceof Error ? error.message : String(error);
+        }
+      }
+
+      // Fallback: scrape the authenticated settings page (HTML) for screen_name/user_id
+      const profilePages = ['https://x.com/settings/account', 'https://twitter.com/settings/account'];
+      for (const page of profilePages) {
+        try {
+          const response = await this.fetchWithTimeout(page, {
+            headers: {
+              cookie: this.cookieHeader,
+              'user-agent': this.userAgent,
+            },
+          });
+
+          if (!response.ok) {
+            lastError = `HTTP ${response.status} (settings page)`;
+            continue;
+          }
+
+          const html = await response.text();
+          const usernameMatch = SETTINGS_SCREEN_NAME_REGEX.exec(html);
+          const idMatch = SETTINGS_USER_ID_REGEX.exec(html);
+          const nameMatch = SETTINGS_NAME_REGEX.exec(html);
+
+          const username = usernameMatch?.[1];
+          const userId = idMatch?.[1];
+          const name = nameMatch?.[1]?.replace(/\\"/g, '"');
+
+          if (username && userId) {
+            return {
+              success: true,
+              user: {
+                id: userId,
+                username,
+                name: name || username,
+              },
+            };
+          }
+
+          lastError = 'Could not parse settings page for user info';
+        } catch (error) {
+          lastError = error instanceof Error ? error.message : String(error);
+        }
+      }
+
+      return {
+        success: false,
+        error: lastError ?? 'Unknown error fetching current user',
+      };
+    }
+
+    /**
+     * Get users that a user is following
+     */
+    async getFollowing(userId: string, count = 20): Promise<FollowingResult> {
+      const variables = {
+        userId,
+        count,
+        includePromotedContent: false,
+      };
+
+      const features = buildFollowingFeatures();
+
+      const params = new URLSearchParams({
+        variables: JSON.stringify(variables),
+        features: JSON.stringify(features),
+      });
+
+      const tryOnce = async () => {
+        let lastError: string | undefined;
+        let had404 = false;
+        const queryIds = await this.getFollowingQueryIds();
+
+        for (const queryId of queryIds) {
+          const url = `${TWITTER_API_BASE}/${queryId}/Following?${params.toString()}`;
+
+          try {
+            const response = await this.fetchWithTimeout(url, {
+              method: 'GET',
+              headers: this.getHeaders(),
+            });
+
+            if (response.status === 404) {
+              had404 = true;
+              lastError = `HTTP ${response.status}`;
+              continue;
+            }
+
+            if (!response.ok) {
+              const text = await response.text();
+              return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}`, had404 };
+            }
+
+            const data = (await response.json()) as {
+              data?: {
+                user?: {
+                  result?: {
+                    timeline?: {
+                      timeline?: {
+                        instructions?: Array<{ type?: string; entries?: Array<unknown> }>;
+                      };
+                    };
+                  };
+                };
+              };
+              errors?: Array<{ message: string }>;
+            };
+
+            if (data.errors && data.errors.length > 0) {
+              return { success: false as const, error: data.errors.map((e) => e.message).join(', '), had404 };
+            }
+
+            const instructions = data.data?.user?.result?.timeline?.timeline?.instructions;
+            const users = parseUsersFromInstructions(instructions);
+
+            return { success: true as const, users, had404 };
+          } catch (error) {
+            lastError = error instanceof Error ? error.message : String(error);
+          }
+        }
+
+        return { success: false as const, error: lastError ?? 'Unknown error fetching following', had404 };
+      };
+
+      const firstAttempt = await tryOnce();
+      if (firstAttempt.success) {
+        return { success: true, users: firstAttempt.users };
+      }
+
+      if (firstAttempt.had404) {
+        await this.refreshQueryIds();
+        const secondAttempt = await tryOnce();
+        if (secondAttempt.success) {
+          return { success: true, users: secondAttempt.users };
+        }
+        return { success: false, error: secondAttempt.error };
+      }
+
+      return { success: false, error: firstAttempt.error };
+    }
+
+    /**
+     * Get users that follow a user
+     */
+    async getFollowers(userId: string, count = 20): Promise<FollowingResult> {
+      const variables = {
+        userId,
+        count,
+        includePromotedContent: false,
+      };
+
+      const features = buildFollowingFeatures();
+
+      const params = new URLSearchParams({
+        variables: JSON.stringify(variables),
+        features: JSON.stringify(features),
+      });
+
+      const tryOnce = async () => {
+        let lastError: string | undefined;
+        let had404 = false;
+        const queryIds = await this.getFollowersQueryIds();
+
+        for (const queryId of queryIds) {
+          const url = `${TWITTER_API_BASE}/${queryId}/Followers?${params.toString()}`;
+
+          try {
+            const response = await this.fetchWithTimeout(url, {
+              method: 'GET',
+              headers: this.getHeaders(),
+            });
+
+            if (response.status === 404) {
+              had404 = true;
+              lastError = `HTTP ${response.status}`;
+              continue;
+            }
+
+            if (!response.ok) {
+              const text = await response.text();
+              return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}`, had404 };
+            }
+
+            const data = (await response.json()) as {
+              data?: {
+                user?: {
+                  result?: {
+                    timeline?: {
+                      timeline?: {
+                        instructions?: Array<{ type?: string; entries?: Array<unknown> }>;
+                      };
+                    };
+                  };
+                };
+              };
+              errors?: Array<{ message: string }>;
+            };
+
+            if (data.errors && data.errors.length > 0) {
+              return { success: false as const, error: data.errors.map((e) => e.message).join(', '), had404 };
+            }
+
+            const instructions = data.data?.user?.result?.timeline?.timeline?.instructions;
+            const users = parseUsersFromInstructions(instructions);
+
+            return { success: true as const, users, had404 };
+          } catch (error) {
+            lastError = error instanceof Error ? error.message : String(error);
+          }
+        }
+
+        return { success: false as const, error: lastError ?? 'Unknown error fetching followers', had404 };
+      };
+
+      const firstAttempt = await tryOnce();
+      if (firstAttempt.success) {
+        return { success: true, users: firstAttempt.users };
+      }
+
+      if (firstAttempt.had404) {
+        await this.refreshQueryIds();
+        const secondAttempt = await tryOnce();
+        if (secondAttempt.success) {
+          return { success: true, users: secondAttempt.users };
+        }
+        return { success: false, error: secondAttempt.error };
+      }
+
+      return { success: false, error: firstAttempt.error };
+    }
+  };
+}

src/lib/twitter-client-utils.ts

@@ -0,0 +1,455 @@
+import type { GraphqlTweetResult, TweetData, TwitterUser } from './twitter-client-types.js';
+
+export function normalizeQuoteDepth(value?: number): number {
+  if (value === undefined || value === null) {
+    return 1;
+  }
+  if (!Number.isFinite(value)) {
+    return 1;
+  }
+  return Math.max(0, Math.floor(value));
+}
+
+export function firstText(...values: Array<string | undefined | null>): string | undefined {
+  for (const value of values) {
+    if (typeof value === 'string') {
+      const trimmed = value.trim();
+      if (trimmed) {
+        return trimmed;
+      }
+    }
+  }
+  return undefined;
+}
+
+export function collectTextFields(value: unknown, keys: Set<string>, output: string[]): void {
+  if (!value) {
+    return;
+  }
+  if (typeof value === 'string') {
+    return;
+  }
+
+  if (Array.isArray(value)) {
+    for (const item of value) {
+      collectTextFields(item, keys, output);
+    }
+    return;
+  }
+
+  if (typeof value === 'object') {
+    for (const [key, nested] of Object.entries(value as Record<string, unknown>)) {
+      if (keys.has(key)) {
+        if (typeof nested === 'string') {
+          const trimmed = nested.trim();
+          if (trimmed) {
+            output.push(trimmed);
+          }
+          continue;
+        }
+      }
+      collectTextFields(nested, keys, output);
+    }
+  }
+}
+
+export function uniqueOrdered(values: string[]): string[] {
+  const seen = new Set<string>();
+  const result: string[] = [];
+  for (const value of values) {
+    if (seen.has(value)) {
+      continue;
+    }
+    seen.add(value);
+    result.push(value);
+  }
+  return result;
+}
+
+export function extractArticleText(result: GraphqlTweetResult | undefined): string | undefined {
+  const article = result?.article;
+  if (!article) {
+    return undefined;
+  }
+
+  const articleResult = article.article_results?.result ?? article;
+  if (process.env.BIRD_DEBUG_ARTICLE === '1') {
+    console.error(
+      '[bird][debug][article] payload:',
+      JSON.stringify(
+        {
+          rest_id: result?.rest_id,
+          article: articleResult,
+          note_tweet: result?.note_tweet?.note_tweet_results?.result ?? null,
+        },
+        null,
+        2,
+      ),
+    );
+  }
+  const title = firstText(articleResult.title, article.title);
+  let body = firstText(
+    articleResult.plain_text,
+    article.plain_text,
+    articleResult.body?.text,
+    articleResult.body?.richtext?.text,
+    articleResult.body?.rich_text?.text,
+    articleResult.content?.text,
+    articleResult.content?.richtext?.text,
+    articleResult.content?.rich_text?.text,
+    articleResult.text,
+    articleResult.richtext?.text,
+    articleResult.rich_text?.text,
+    article.body?.text,
+    article.body?.richtext?.text,
+    article.body?.rich_text?.text,
+    article.content?.text,
+    article.content?.richtext?.text,
+    article.content?.rich_text?.text,
+    article.text,
+    article.richtext?.text,
+    article.rich_text?.text,
+  );
+
+  if (body && title && body.trim() === title.trim()) {
+    body = undefined;
+  }
+
+  if (!body) {
+    const collected: string[] = [];
+    collectTextFields(articleResult, new Set(['text', 'title']), collected);
+    collectTextFields(article, new Set(['text', 'title']), collected);
+    const unique = uniqueOrdered(collected);
+    const filtered = title ? unique.filter((value) => value !== title) : unique;
+    if (filtered.length > 0) {
+      body = filtered.join('\n\n');
+    }
+  }
+
+  if (title && body && !body.startsWith(title)) {
+    return `${title}\n\n${body}`;
+  }
+
+  return body ?? title;
+}
+
+export function extractNoteTweetText(result: GraphqlTweetResult | undefined): string | undefined {
+  const note = result?.note_tweet?.note_tweet_results?.result;
+  if (!note) {
+    return undefined;
+  }
+
+  return firstText(
+    note.text,
+    note.richtext?.text,
+    note.rich_text?.text,
+    note.content?.text,
+    note.content?.richtext?.text,
+    note.content?.rich_text?.text,
+  );
+}
+
+export function extractTweetText(result: GraphqlTweetResult | undefined): string | undefined {
+  return extractArticleText(result) ?? extractNoteTweetText(result) ?? firstText(result?.legacy?.full_text);
+}
+
+export function unwrapTweetResult(result: GraphqlTweetResult | undefined): GraphqlTweetResult | undefined {
+  if (!result) {
+    return undefined;
+  }
+  if (result.tweet) {
+    return result.tweet;
+  }
+  return result;
+}
+
+export function mapTweetResult(result: GraphqlTweetResult | undefined, quoteDepth: number): TweetData | undefined {
+  const userResult = result?.core?.user_results?.result;
+  const userLegacy = userResult?.legacy;
+  const userCore = userResult?.core;
+  const username = userLegacy?.screen_name ?? userCore?.screen_name;
+  const name = userLegacy?.name ?? userCore?.name ?? username;
+  const userId = userResult?.rest_id;
+  if (!result?.rest_id || !username) {
+    return undefined;
+  }
+
+  const text = extractTweetText(result);
+  if (!text) {
+    return undefined;
+  }
+
+  let quotedTweet: TweetData | undefined;
+  if (quoteDepth > 0) {
+    const quotedResult = unwrapTweetResult(result.quoted_status_result?.result);
+    if (quotedResult) {
+      quotedTweet = mapTweetResult(quotedResult, quoteDepth - 1);
+    }
+  }
+
+  return {
+    id: result.rest_id,
+    text,
+    createdAt: result.legacy?.created_at,
+    replyCount: result.legacy?.reply_count,
+    retweetCount: result.legacy?.retweet_count,
+    likeCount: result.legacy?.favorite_count,
+    conversationId: result.legacy?.conversation_id_str,
+    inReplyToStatusId: result.legacy?.in_reply_to_status_id_str ?? undefined,
+    author: {
+      username,
+      name: name || username,
+    },
+    authorId: userId,
+    quotedTweet,
+  };
+}
+
+export function findTweetInInstructions(
+  instructions:
+    | Array<{
+        entries?: Array<{
+          content?: {
+            itemContent?: {
+              tweet_results?: {
+                result?: GraphqlTweetResult;
+              };
+            };
+          };
+        }>;
+      }>
+    | undefined,
+  tweetId: string,
+) {
+  if (!instructions) {
+    return undefined;
+  }
+
+  for (const instruction of instructions) {
+    for (const entry of instruction.entries || []) {
+      const result = entry.content?.itemContent?.tweet_results?.result;
+      if (result?.rest_id === tweetId) {
+        return result;
+      }
+    }
+  }
+
+  return undefined;
+}
+
+export function collectTweetResultsFromEntry(entry: {
+  content?: {
+    itemContent?: {
+      tweet_results?: {
+        result?: GraphqlTweetResult;
+      };
+    };
+    item?: {
+      itemContent?: {
+        tweet_results?: {
+          result?: GraphqlTweetResult;
+        };
+      };
+    };
+    items?: Array<{
+      item?: {
+        itemContent?: {
+          tweet_results?: {
+            result?: GraphqlTweetResult;
+          };
+        };
+      };
+      itemContent?: {
+        tweet_results?: {
+          result?: GraphqlTweetResult;
+        };
+      };
+      content?: {
+        itemContent?: {
+          tweet_results?: {
+            result?: GraphqlTweetResult;
+          };
+        };
+      };
+    }>;
+  };
+}): GraphqlTweetResult[] {
+  const results: GraphqlTweetResult[] = [];
+  const pushResult = (result?: GraphqlTweetResult) => {
+    if (result?.rest_id) {
+      results.push(result);
+    }
+  };
+
+  const content = entry.content;
+  pushResult(content?.itemContent?.tweet_results?.result);
+  pushResult(content?.item?.itemContent?.tweet_results?.result);
+
+  for (const item of content?.items ?? []) {
+    pushResult(item?.item?.itemContent?.tweet_results?.result);
+    pushResult(item?.itemContent?.tweet_results?.result);
+    pushResult(item?.content?.itemContent?.tweet_results?.result);
+  }
+
+  return results;
+}
+
+export function parseTweetsFromInstructions(
+  instructions:
+    | Array<{
+        entries?: Array<{
+          content?: {
+            itemContent?: {
+              tweet_results?: {
+                result?: GraphqlTweetResult;
+              };
+            };
+            item?: {
+              itemContent?: {
+                tweet_results?: {
+                  result?: GraphqlTweetResult;
+                };
+              };
+            };
+            items?: Array<{
+              item?: {
+                itemContent?: {
+                  tweet_results?: {
+                    result?: GraphqlTweetResult;
+                  };
+                };
+              };
+              itemContent?: {
+                tweet_results?: {
+                  result?: GraphqlTweetResult;
+                };
+              };
+              content?: {
+                itemContent?: {
+                  tweet_results?: {
+                    result?: GraphqlTweetResult;
+                  };
+                };
+              };
+            }>;
+          };
+        }>;
+      }>
+    | undefined,
+  quoteDepth: number,
+): TweetData[] {
+  const tweets: TweetData[] = [];
+  const seen = new Set<string>();
+
+  for (const instruction of instructions ?? []) {
+    for (const entry of instruction.entries ?? []) {
+      const results = collectTweetResultsFromEntry(entry);
+      for (const result of results) {
+        const mapped = mapTweetResult(result, quoteDepth);
+        if (!mapped || seen.has(mapped.id)) {
+          continue;
+        }
+        seen.add(mapped.id);
+        tweets.push(mapped);
+      }
+    }
+  }
+
+  return tweets;
+}
+
+export function extractCursorFromInstructions(
+  instructions:
+    | Array<{
+        entries?: Array<{
+          content?: unknown;
+        }>;
+      }>
+    | undefined,
+  cursorType = 'Bottom',
+): string | undefined {
+  for (const instruction of instructions ?? []) {
+    for (const entry of instruction.entries ?? []) {
+      const content = entry.content as { cursorType?: unknown; value?: unknown } | undefined;
+      if (content?.cursorType === cursorType && typeof content.value === 'string' && content.value.length > 0) {
+        return content.value;
+      }
+    }
+  }
+  return undefined;
+}
+
+export function parseUsersFromInstructions(
+  instructions: Array<{ type?: string; entries?: Array<unknown> }> | undefined,
+): TwitterUser[] {
+  if (!instructions) {
+    return [];
+  }
+
+  const users: TwitterUser[] = [];
+
+  for (const instruction of instructions) {
+    if (!instruction.entries) {
+      continue;
+    }
+
+    for (const entry of instruction.entries) {
+      const content = (entry as { content?: { itemContent?: { user_results?: { result?: unknown } } } })?.content;
+      const rawUserResult = content?.itemContent?.user_results?.result as
+        | {
+            __typename?: string;
+            rest_id?: string;
+            is_blue_verified?: boolean;
+            user?: unknown;
+            legacy?: {
+              screen_name?: string;
+              name?: string;
+              description?: string;
+              followers_count?: number;
+              friends_count?: number;
+              profile_image_url_https?: string;
+              created_at?: string;
+            };
+            core?: {
+              screen_name?: string;
+              name?: string;
+              created_at?: string;
+            };
+            avatar?: {
+              image_url?: string;
+            };
+          }
+        | undefined;
+
+      const userResult =
+        rawUserResult?.__typename === 'UserWithVisibilityResults' && rawUserResult.user
+          ? (rawUserResult.user as typeof rawUserResult)
+          : rawUserResult;
+
+      if (!userResult || userResult.__typename !== 'User') {
+        continue;
+      }
+
+      const legacy = userResult.legacy;
+      const core = userResult.core;
+      const username = legacy?.screen_name ?? core?.screen_name;
+      if (!userResult.rest_id || !username) {
+        continue;
+      }
+
+      users.push({
+        id: userResult.rest_id,
+        username,
+        name: legacy?.name ?? core?.name ?? username,
+        description: legacy?.description,
+        followersCount: legacy?.followers_count,
+        followingCount: legacy?.friends_count,
+        isBlueVerified: userResult.is_blue_verified,
+        profileImageUrl: legacy?.profile_image_url_https ?? userResult.avatar?.image_url,
+        createdAt: legacy?.created_at ?? core?.created_at,
+      });
+    }
+  }
+
+  return users;
+}