chore(release): 0.4.1

feat: add bookmarks command

.npmrc

@@ -0,0 +1 @@
+auto-install-peers=false

CHANGELOG.md

@@ -1,6 +1,19 @@
 # Changelog
 
-## 0.4.1 — Unreleased
+## 0.4.1 — 2025-12-31
+
+### Added
+- `bookmarks` command to list your bookmarked tweets.
+
+### Changed
+- Cookie extraction now uses `@steipete/sweet-cookie` (drops `sqlite3` CLI + custom browser readers in `bird`).
+- Query ID updater now tracks the Bookmarks GraphQL operation.
+- Lint rules stricter (block statements, no-negation-else, useConst/useTemplate, top-level regex, import extension enforcement).
+- `pnpm lint` now runs both Biome and oxlint (type-aware).
+
+### Tests
+- Coverage thresholds raised to 90% statements/lines/functions (80% branches).
+- Added targeted Twitter client coverage suites.
 
 ## 0.4.0 — 2025-12-26
 

README.md

@@ -48,6 +48,9 @@ bird search "from:steipete" -n 5
 bird mentions -n 5
 bird mentions --user @steipete -n 5
 
+# Bookmarks
+bird bookmarks -n 5
+
 # Refresh GraphQL query IDs cache (no rebuild)
 bird query-ids --fresh
 ```
@@ -64,6 +67,7 @@ bird query-ids --fresh
 - `bird thread <tweet-id-or-url> [--json]` — show the full conversation thread.
 - `bird search "<query>" [-n count] [--json]` — search for tweets matching a query.
 - `bird mentions [-n count] [--user @handle] [--json]` — find tweets mentioning a user (defaults to the authenticated user).
+- `bird bookmarks [-n count] [--json]` — list your bookmarked tweets.
 - `bird whoami` — print which Twitter account your cookies belong to.
 - `bird check` — show which credentials are available and where they were sourced from.
 
@@ -87,7 +91,7 @@ Write operations:
 
 1. CLI flags: `--auth-token`, `--ct0`
 2. Environment variables: `AUTH_TOKEN`, `CT0` (fallback: `TWITTER_AUTH_TOKEN`, `TWITTER_CT0`)
-3. Browser cookies (macOS): Safari, Chrome, Firefox (override via `--cookie-source` order)
+3. Browser cookies via `@steipete/sweet-cookie` (override via `--cookie-source` order)
 
 Browser cookie sources:
 - Safari: `~/Library/Cookies/Cookies.binarycookies` (fallback: `~/Library/Containers/com.apple.Safari/Data/Library/Cookies/Cookies.binarycookies`)
@@ -117,7 +121,7 @@ Environment shortcuts:
 
 ## Output
 
-- `--json` prints raw tweet objects for read/replies/thread/search/mentions.
+- `--json` prints raw tweet objects for read/replies/thread/search/mentions/bookmarks.
 - `read` returns full text for Notes and Articles when present.
 - Use `--plain` for stable, script-friendly output (no emoji, no color).
 

biome.json

@@ -11,10 +11,31 @@
     "rules": {
       "recommended": true,
       "complexity": {
-        "noForEach": "off"
+        "noForEach": "error"
+      },
+      "correctness": {
+        "useImportExtensions": {
+          "level": "error",
+          "options": {
+            "forceJsExtensions": true
+          }
+        }
+      },
+      "performance": {
+        "useTopLevelRegex": "error"
       },
       "style": {
-        "noNonNullAssertion": "off"
+        "noNegationElse": "error",
+        "noNonNullAssertion": "error",
+        "useBlockStatements": "error",
+        "useConst": "error",
+        "useTemplate": "error"
+      },
+      "suspicious": {
+        "noExplicitAny": "error"
+      },
+      "nursery": {
+        "useRegexpExec": "error"
       }
     }
   },

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@steipete/bird",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "CLI tool for tweeting and replying via Twitter/X GraphQL API",
   "type": "module",
   "main": "dist/index.js",
@@ -21,13 +21,18 @@
     "bird": "pnpm run build:dist && node dist/index.js",
     "test": "vitest run",
     "test:watch": "vitest",
-    "lint": "biome check .",
+    "lint": "pnpm run lint:biome && pnpm run lint:oxlint",
-    "lint:fix": "biome check --write .",
+    "lint:biome": "biome check .",
+    "lint:oxlint": "oxlint --type-aware --tsconfig tsconfig.oxlint.json --import-plugin --node-plugin --vitest-plugin --deny-warnings src tests scripts",
+    "lint:fix": "pnpm run lint:biome:fix && pnpm run lint:oxlint:fix",
+    "lint:biome:fix": "biome check --write .",
+    "lint:oxlint:fix": "oxlint --type-aware --tsconfig tsconfig.oxlint.json --import-plugin --node-plugin --vitest-plugin --deny-warnings --fix src tests scripts",
     "format": "biome format --write .",
     "binary": "pnpm run build:binary",
     "graphql:update": "tsx scripts/update-query-ids.ts"
   },
   "dependencies": {
+    "@steipete/sweet-cookie": "0.1.0",
     "commander": "^14.0.2",
     "json5": "^2.2.3",
     "kleur": "^4.1.5"
@@ -36,11 +41,13 @@
     "@biomejs/biome": "^2.3.10",
     "@types/node": "^25.0.3",
     "@vitest/coverage-v8": "4.0.16",
+    "oxlint": "^1.36.0",
+    "oxlint-tsgolint": "^0.10.0",
     "tsx": "^4.21.0",
     "typescript": "^5.9.3",
     "vitest": "^4.0.16"
   },
   "engines": {
-    "node": ">=20"
+    "node": ">=22"
   }
 }

pnpm-lock.yaml

@@ -1,13 +1,16 @@
 lockfileVersion: '9.0'
 
 settings:
-  autoInstallPeers: true
+  autoInstallPeers: false
   excludeLinksFromLockfile: false
 
 importers:
 
   .:
     dependencies:
+      '@steipete/sweet-cookie':
+        specifier: 0.1.0
+        version: 0.1.0
       commander:
         specifier: ^14.0.2
         version: 14.0.2
@@ -27,6 +30,12 @@ importers:
       '@vitest/coverage-v8':
         specifier: 4.0.16
         version: 4.0.16([email protected](@types/[email protected])([email protected]))
+      oxlint:
+        specifier: ^1.36.0
+        version: 1.36.0([email protected])
+      oxlint-tsgolint:
+        specifier: ^0.10.0
+        version: 0.10.0
       tsx:
         specifier: ^4.21.0
         version: 4.21.0
@@ -279,6 +288,76 @@ packages:
   '@jridgewell/[email protected]':
     resolution: {integrity: sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==}
 
+  '@oxlint-tsgolint/[email protected]':
+    resolution: {integrity: sha512-mhBF/pjey0UdLL1ocU46Fqta+uJuRfqrLfDpcViRg17BtDiUNd8JY9iN2FOoS2HGSCAgCUjZ0AZkwkHwFs/VTw==}
+    cpu: [arm64]
+    os: [darwin]
+
+  '@oxlint-tsgolint/[email protected]':
+    resolution: {integrity: sha512-roLi34mw/i1z+NS7luboix55SXyhVv38dNUTcRDkk+0lNPzI9ngrM+1y1N2oBSUmz5o9OZGnfJJ7BSGCw/fFEQ==}
+    cpu: [x64]
+    os: [darwin]
+
+  '@oxlint-tsgolint/[email protected]':
+    resolution: {integrity: sha512-HL9NThPH1V2F6l9XhwNmhQZUknN4m4yQYEvQFFGfZTYN6cvEEBIiqfF4KvBUg8c0xadMbQlW+Ug7/ybA9Nn+CA==}
+    cpu: [arm64]
+    os: [linux]
+
+  '@oxlint-tsgolint/[email protected]':
+    resolution: {integrity: sha512-Tw8QNq8ab+4+qE5krvJyMA66v6XE3GoiISRD5WmJ7YOxUnu//jSw/bBm7OYf/TNEZyeV0BTR7zXzhT5R+VFWlQ==}
+    cpu: [x64]
+    os: [linux]
+
+  '@oxlint-tsgolint/[email protected]':
+    resolution: {integrity: sha512-LTogmTRwpwQqVaH1Ama8Wd5/VVZWBSF8v5qTbeT628+1F5Kt1V5eHBvyFh4oN18UCZlgqrh7DqkDhsieXUaC8Q==}
+    cpu: [arm64]
+    os: [win32]
+
+  '@oxlint-tsgolint/[email protected]':
+    resolution: {integrity: sha512-ygqxx8EmNWy9/wCQS5uXq9k/o2EyYNwNxY1ZHNzlmZC/kV06Aemx5OBDafefawBNqH7xTZPfccUrjdiy+QlTrw==}
+    cpu: [x64]
+    os: [win32]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-MJkj82GH+nhvWKJhSIM6KlZ8tyGKdogSQXtNdpIyP02r/tTayFJQaAEWayG2Jhsn93kske+nimg5MYFhwO/rlg==}
+    cpu: [arm64]
+    os: [darwin]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-VvEhfkqj/99dCTqOcfkyFXOSbx4lIy5u2m2GHbK4WCMDySokOcMTNRHGw8fH/WgQ5cDrDMSTYIGQTmnBGi9tiQ==}
+    cpu: [x64]
+    os: [darwin]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-EMx92X5q+hHc3olTuj/kgkx9+yP0p/AVs4yvHbUfzZhBekXNpUWxWvg4hIKmQWn+Ee2j4o80/0ACGO0hDYJ9mg==}
+    cpu: [arm64]
+    os: [linux]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-7YCxtrPIctVYLqWrWkk8pahdCxch6PtsaucfMLC7TOlDt4nODhnQd4yzEscKqJ8Gjrw1bF4g+Ngob1gB+Qr9Fw==}
+    cpu: [arm64]
+    os: [linux]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-lnaJVlx5r3NWmoOMesfQXJSf78jHTn8Z+sdAf795Kgteo72+qGC1Uax2SToCJVN2J8PNG3oRV5bLriiCNR2i6Q==}
+    cpu: [x64]
+    os: [linux]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-AhuEU2Qdl66lSfTGu/Htirq8r/8q2YnZoG3yEXLMQWnPMn7efy8spD/N1NA7kH0Hll+cdfwgQkQqC2G4MS2lPQ==}
+    cpu: [x64]
+    os: [linux]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-GlWCBjUJY2QgvBFuNRkiRJu7K/djLmM0UQKfZV8IN+UXbP/JbjZHWKRdd4LXlQmzoz7M5Hd6p+ElCej8/90FCg==}
+    cpu: [arm64]
+    os: [win32]
+
+  '@oxlint/[email protected]':
+    resolution: {integrity: sha512-J+Vc00Utcf8p77lZPruQgb0QnQXuKnFogN88kCnOqs2a83I+vTBB8ILr0+L9sTwVRvIDMSC0pLdeQH4svWGFZg==}
+    cpu: [x64]
+    os: [win32]
+
   '@rollup/[email protected]':
     resolution: {integrity: sha512-iDGS/h7D8t7tvZ1t6+WPK04KD0MwzLZrG0se1hzBjSi5fyxlsiggoJHwh18PCFNn7tG43OWb6pdZ6Y+rMlmyNQ==}
     cpu: [arm]
@@ -392,6 +471,10 @@ packages:
   '@standard-schema/[email protected]':
     resolution: {integrity: sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==}
 
+  '@steipete/[email protected]':
+    resolution: {integrity: sha512-cF8hS6rTohAFI1NAm2/HM9omBlw6V1DpwF6q5e9FB+l274HjtyirCgCc6QK2Rtuh7uDoqWHshFQZPsceyJuVgw==}
+    engines: {node: '>=22'}
+
   '@types/[email protected]':
     resolution: {integrity: sha512-Mw558oeA9fFbv65/y4mHtXDs9bPnFMZAL/jxdPFUpOHHIXX91mcgEHbS5Lahr+pwZFR8A7GQleRWeI6cGFC2UA==}
 
@@ -554,6 +637,20 @@ packages:
   [email protected]:
     resolution: {integrity: sha512-uTqF9MuPraAQ+IsnPf366RG4cP9RtUi7MLO1N3KEc+wb0a6yKpeL0lmk2IB1jY5KHPAlTc6T/JRdC/YqxHNwkQ==}
 
+  [email protected]:
+    resolution: {integrity: sha512-LDDSIu5J/4D4gFUuQQIEQpAC6maNEbMg4nC8JL/+Pe0cUDR86dtVZ09E2x5MwCh8f9yfktoaxt5x6UIVyzrajg==}
+    hasBin: true
+
+  [email protected]:
+    resolution: {integrity: sha512-IicUdXfXgI8OKrDPnoSjvBfeEF8PkKtm+CoLlg4LYe4ypc8U+T4r7730XYshdBGZdelg+JRw8GtCb2w/KaaZvw==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    hasBin: true
+    peerDependencies:
+      oxlint-tsgolint: '>=0.10.0'
+    peerDependenciesMeta:
+      oxlint-tsgolint:
+        optional: true
+
   [email protected]:
     resolution: {integrity: sha512-WUjGcAqP1gQacoQe+OBJsFA7Ld4DyXuUIjZ5cc75cLHvJ7dtNsTugphxIADwspS+AraAUePCKrSVtPLFj/F88w==}
 
@@ -844,6 +941,48 @@ snapshots:
       '@jridgewell/resolve-uri': 3.1.2
       '@jridgewell/sourcemap-codec': 1.5.5
 
+  '@oxlint-tsgolint/[email protected]':
+    optional: true
+
+  '@oxlint-tsgolint/[email protected]':
+    optional: true
+
+  '@oxlint-tsgolint/[email protected]':
+    optional: true
+
+  '@oxlint-tsgolint/[email protected]':
+    optional: true
+
+  '@oxlint-tsgolint/[email protected]':
+    optional: true
+
+  '@oxlint-tsgolint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
+  '@oxlint/[email protected]':
+    optional: true
+
   '@rollup/[email protected]':
     optional: true
 
@@ -912,6 +1051,8 @@ snapshots:
 
   '@standard-schema/[email protected]': {}
 
+  '@steipete/[email protected]': {}
+
   '@types/[email protected]':
     dependencies:
       '@types/deep-eql': 4.0.2
@@ -1096,6 +1237,27 @@ snapshots:
 
   [email protected]: {}
 
+  [email protected]:
+    optionalDependencies:
+      '@oxlint-tsgolint/darwin-arm64': 0.10.0
+      '@oxlint-tsgolint/darwin-x64': 0.10.0
+      '@oxlint-tsgolint/linux-arm64': 0.10.0
+      '@oxlint-tsgolint/linux-x64': 0.10.0
+      '@oxlint-tsgolint/win32-arm64': 0.10.0
+      '@oxlint-tsgolint/win32-x64': 0.10.0
+
+  [email protected]([email protected]):
+    optionalDependencies:
+      '@oxlint/darwin-arm64': 1.36.0
+      '@oxlint/darwin-x64': 1.36.0
+      '@oxlint/linux-arm64-gnu': 1.36.0
+      '@oxlint/linux-arm64-musl': 1.36.0
+      '@oxlint/linux-x64-gnu': 1.36.0
+      '@oxlint/linux-x64-musl': 1.36.0
+      '@oxlint/win32-arm64': 1.36.0
+      '@oxlint/win32-x64': 1.36.0
+      oxlint-tsgolint: 0.10.0
+
   [email protected]: {}
 
   [email protected]: {}

scripts/update-query-ids.ts

@@ -13,6 +13,7 @@ const TARGET_OPERATIONS = [
   'FavoriteTweet',
   'TweetDetail',
   'SearchTimeline',
+  'Bookmarks',
 ] as const;
 
 type OperationName = (typeof TARGET_OPERATIONS)[number];

src/index.ts

@@ -32,16 +32,19 @@ import { runtimeQueryIds } from './lib/runtime-query-ids.js';
 import { type TweetData, TwitterClient } from './lib/twitter-client.js';
 import { getCliVersion } from './lib/version.js';
 
-const program = new Command();
+const program: Command = new Command();
 
-const rawArgs = process.argv.slice(2);
+const rawArgs: string[] = process.argv.slice(2);
-const normalizedArgs = rawArgs[0] === '--' ? rawArgs.slice(1) : rawArgs;
+const normalizedArgs: string[] = rawArgs[0] === '--' ? rawArgs.slice(1) : rawArgs;
-const isTty = process.stdout.isTTY;
+const isTty: boolean = process.stdout.isTTY;
 let output: OutputConfig = resolveOutputConfigFromArgv(normalizedArgs, process.env, isTty);
 kleur.enabled = output.color;
 
-const wrap = (styler: (text: string) => string) => (text: string) => (isTty ? styler(text) : text);
+const wrap =
-const collect = (value: string, previous: string[] = []) => {
+  (styler: (text: string) => string): ((text: string) => string) =>
+  (text: string): string =>
+    isTty ? styler(text) : text;
+const collect = (value: string, previous: string[] = []): string[] => {
   previous.push(value);
   return previous;
 };
@@ -50,16 +53,22 @@ const COOKIE_SOURCES: CookieSource[] = ['safari', 'chrome', 'firefox'];
 
 function parseCookieSource(value: string): CookieSource {
   const normalized = value.trim().toLowerCase();
-  if (normalized === 'safari' || normalized === 'chrome' || normalized === 'firefox') return normalized;
+  if (normalized === 'safari' || normalized === 'chrome' || normalized === 'firefox') {
+    return normalized;
+  }
   throw new Error(`Invalid --cookie-source "${value}". Allowed: safari, chrome, firefox.`);
 }
 
 function resolveCookieSourceOrder(input: unknown): CookieSource[] | undefined {
-  if (typeof input === 'string') return [parseCookieSource(input)];
+  if (typeof input === 'string') {
+    return [parseCookieSource(input)];
+  }
   if (Array.isArray(input)) {
     const result: CookieSource[] = [];
     for (const entry of input) {
-      if (typeof entry !== 'string') continue;
+      if (typeof entry !== 'string') {
+        continue;
+      }
       result.push(parseCookieSource(entry));
     }
     return result.length > 0 ? result : undefined;
@@ -67,15 +76,15 @@ function resolveCookieSourceOrder(input: unknown): CookieSource[] | undefined {
   return undefined;
 }
 
-const collectCookieSource = (value: string, previous: CookieSource[] = []) => {
+const collectCookieSource = (value: string, previous: CookieSource[] = []): CookieSource[] => {
   previous.push(parseCookieSource(value));
   return previous;
 };
 
-const p = (kind: Parameters<typeof statusPrefix>[0]) => statusPrefix(kind, output);
+const p = (kind: Parameters<typeof statusPrefix>[0]): string => statusPrefix(kind, output);
-const l = (kind: Parameters<typeof labelPrefix>[0]) => labelPrefix(kind, output);
+const l = (kind: Parameters<typeof labelPrefix>[0]): string => labelPrefix(kind, output);
 
-function applyOutputFromCommand(command: Command) {
+function applyOutputFromCommand(command: Command): void {
   const opts = command.optsWithGlobals() as { plain?: boolean; emoji?: boolean; color?: boolean };
   output = resolveOutputConfigFromCommander(opts, process.env, isTty);
   kleur.enabled = output.color;
@@ -102,7 +111,9 @@ type BirdConfig = {
 };
 
 function readConfigFile(path: string): Partial<BirdConfig> {
-  if (!existsSync(path)) return {};
+  if (!existsSync(path)) {
+    return {};
+  }
   try {
     const raw = readFileSync(path, 'utf8');
     const parsed = JSON5.parse(raw) as Partial<BirdConfig>;
@@ -138,6 +149,7 @@ const KNOWN_COMMANDS = new Set([
   'thread',
   'search',
   'mentions',
+  'bookmarks',
   'help',
   'whoami',
   'check',
@@ -150,7 +162,7 @@ program.addHelpText(
 
 program.name('bird').description('Post tweets and replies via Twitter/X GraphQL API').version(getCliVersion());
 
-const formatExample = (command: string, description: string) =>
+const formatExample = (command: string, description: string): string =>
   `${colors.command(`  ${command}`)}\n${colors.muted(`    ${description}`)}`;
 
 program.addHelpText(
@@ -191,7 +203,7 @@ type CredentialsOptions = {
   cookieSource?: CookieSource[];
 };
 
-function resolveCredentialsFromOptions(opts: CredentialsOptions) {
+function resolveCredentialsFromOptions(opts: CredentialsOptions): ReturnType<typeof resolveCredentials> {
   const cookieSource = opts.cookieSource?.length
     ? opts.cookieSource
     : (resolveCookieSourceOrder(config.cookieSource) ?? COOKIE_SOURCES);
@@ -212,9 +224,13 @@ type MediaSpec = { path: string; alt?: string; mime: string; buffer: Buffer };
 
 function resolveTimeoutMs(...values: Array<string | number | undefined | null>): number | undefined {
   for (const value of values) {
-    if (value === undefined || value === null || value === '') continue;
+    if (value === undefined || value === null || value === '') {
+      continue;
+    }
     const parsed = typeof value === 'number' ? value : Number(value);
-    if (Number.isFinite(parsed) && parsed > 0) return parsed;
+    if (Number.isFinite(parsed) && parsed > 0) {
+      return parsed;
+    }
   }
   return undefined;
 }
@@ -225,17 +241,31 @@ function resolveTimeoutFromOptions(options: { timeout?: string | number }): numb
 
 function detectMime(path: string): string | null {
   const ext = path.toLowerCase();
-  if (ext.endsWith('.jpg') || ext.endsWith('.jpeg')) return 'image/jpeg';
+  if (ext.endsWith('.jpg') || ext.endsWith('.jpeg')) {
-  if (ext.endsWith('.png')) return 'image/png';
+    return 'image/jpeg';
-  if (ext.endsWith('.webp')) return 'image/webp';
+  }
-  if (ext.endsWith('.gif')) return 'image/gif';
+  if (ext.endsWith('.png')) {
-  if (ext.endsWith('.mp4') || ext.endsWith('.m4v')) return 'video/mp4';
+    return 'image/png';
-  if (ext.endsWith('.mov')) return 'video/quicktime';
+  }
+  if (ext.endsWith('.webp')) {
+    return 'image/webp';
+  }
+  if (ext.endsWith('.gif')) {
+    return 'image/gif';
+  }
+  if (ext.endsWith('.mp4') || ext.endsWith('.m4v')) {
+    return 'video/mp4';
+  }
+  if (ext.endsWith('.mov')) {
+    return 'video/quicktime';
+  }
   return null;
 }
 
 function loadMedia(opts: { media: string[]; alts: string[] }): MediaSpec[] {
-  if (opts.media.length === 0) return [];
+  if (opts.media.length === 0) {
+    return [];
+  }
   const specs: MediaSpec[] = [];
   for (const [index, path] of opts.media.entries()) {
     const mime = detectMime(path);
@@ -247,9 +277,15 @@ function loadMedia(opts: { media: string[]; alts: string[] }): MediaSpec[] {
   }
 
   const videoCount = specs.filter((m) => m.mime.startsWith('video/')).length;
-  if (videoCount > 1) throw new Error('Only one video can be attached');
+  if (videoCount > 1) {
-  if (videoCount === 1 && specs.length > 1) throw new Error('Video cannot be combined with other media');
+    throw new Error('Only one video can be attached');
-  if (specs.length > 4) throw new Error('Maximum 4 media attachments');
+  }
+  if (videoCount === 1 && specs.length > 1) {
+    throw new Error('Video cannot be combined with other media');
+  }
+  if (specs.length > 4) {
+    throw new Error('Maximum 4 media attachments');
+  }
   return specs;
 }
 
@@ -310,6 +346,7 @@ program
       'TweetDetail',
       'SearchTimeline',
       'UserArticlesTweets',
+      'Bookmarks',
     ];
 
     if (cmdOpts.fresh) {
@@ -651,13 +688,13 @@ program
     if (!query) {
       const who = await client.getCurrentUser();
       const handle = normalizeHandle(who.user?.username);
-      if (!handle) {
+      if (handle) {
+        query = `@${handle}`;
+      } else {
         console.error(
           `${p('err')}Could not determine current user (${who.error ?? 'Unknown error'}). Use --user <handle>.`,
         );
         process.exit(1);
-      } else {
-        query = `@${handle}`;
       }
     }
 
@@ -671,6 +708,39 @@ program
     }
   });
 
+// Bookmarks command - get user's bookmarks
+program
+  .command('bookmarks')
+  .description('Get your bookmarked tweets')
+  .option('-n, --count <number>', 'Number of bookmarks to fetch', '20')
+  .option('--json', 'Output as JSON')
+  .action(async (cmdOpts: { count?: string; json?: boolean }) => {
+    const opts = program.opts();
+    const timeoutMs = resolveTimeoutFromOptions(opts);
+    const count = Number.parseInt(cmdOpts.count || '20', 10);
+
+    const { cookies, warnings } = await resolveCredentialsFromOptions(opts);
+
+    for (const warning of warnings) {
+      console.error(`${p('warn')}${warning}`);
+    }
+
+    if (!cookies.authToken || !cookies.ct0) {
+      console.error(`${p('err')}Missing required credentials`);
+      process.exit(1);
+    }
+
+    const client = new TwitterClient({ cookies, timeoutMs });
+    const result = await client.getBookmarks(count);
+
+    if (result.success && result.tweets) {
+      printTweets(result.tweets, { json: cmdOpts.json, emptyMessage: 'No bookmarks found.' });
+    } else {
+      console.error(`${p('err')}Failed to fetch bookmarks: ${result.error}`);
+      process.exit(1);
+    }
+  });
+
 // Whoami command - show the logged-in account
 program
   .command('whoami')

src/lib/cli-args.ts

@@ -8,7 +8,9 @@ const TWEET_ID_REGEX = /^\d{8,}$/;
 
 export function looksLikeTweetInput(value: string): boolean {
   const trimmed = value.trim();
-  if (!trimmed) return false;
+  if (!trimmed) {
+    return false;
+  }
   return TWEET_URL_REGEX.test(trimmed) || TWEET_ID_REGEX.test(trimmed);
 }
 

src/lib/cookies.ts

@@ -1,13 +1,9 @@
 /**
- * Browser cookie extraction for Twitter authentication
+ * Browser cookie extraction for Twitter authentication.
- * Uses sqlite3 CLI where possible and binarycookies parsing for Safari.
+ * Delegates to @steipete/sweet-cookie for Safari/Chrome/Firefox reads.
  */
 
-import { execSync } from 'node:child_process';
+import { getCookies } from '@steipete/sweet-cookie';
-import { createDecipheriv, pbkdf2Sync } from 'node:crypto';
-import { copyFileSync, existsSync, mkdtempSync, readdirSync, readFileSync, rmSync } from 'node:fs';
-import { tmpdir } from 'node:os';
-import { join } from 'node:path';
 
 export interface TwitterCookies {
   authToken: string | null;
@@ -23,457 +19,150 @@ export interface CookieExtractionResult {
 
 export type CookieSource = 'safari' | 'chrome' | 'firefox';
 
+const TWITTER_COOKIE_NAMES = ['auth_token', 'ct0'] as const;
+const TWITTER_URL = 'https://x.com/';
+const TWITTER_ORIGINS: string[] = ['https://x.com/', 'https://twitter.com/'];
+
 function normalizeValue(value: unknown): string | null {
-  if (typeof value === 'string') {
+  if (typeof value !== 'string') {
-    const trimmed = value.trim();
-    return trimmed.length > 0 ? trimmed : null;
-  }
-  return null;
-}
-
-function getChromeCookiesPath(profile?: string): string {
-  const home = process.env.HOME || '';
-  const profileDir = profile || 'Default';
-  return join(home, 'Library', 'Application Support', 'Google', 'Chrome', profileDir, 'Cookies');
-}
-
-function getFirefoxProfilesRoot(): string | null {
-  const home = process.env.HOME || '';
-  if (process.platform === 'darwin') {
-    return join(home, 'Library', 'Application Support', 'Firefox', 'Profiles');
-  }
-  if (process.platform === 'linux') {
-    return join(home, '.mozilla', 'firefox');
-  }
-  if (process.platform === 'win32') {
-    const appData = process.env.APPDATA;
-    if (!appData) return null;
-    return join(appData, 'Mozilla', 'Firefox', 'Profiles');
-  }
-  return null;
-}
-
-function pickFirefoxProfile(profilesRoot: string, profile?: string): string | null {
-  if (profile) {
-    const candidate = join(profilesRoot, profile, 'cookies.sqlite');
-    return existsSync(candidate) ? candidate : null;
-  }
-
-  const entries = readdirSync(profilesRoot, { withFileTypes: true });
-  const defaultRelease = entries.find((entry) => entry.isDirectory() && entry.name.includes('default-release'));
-  const targetDir = defaultRelease?.name ?? entries.find((e) => e.isDirectory())?.name;
-  if (!targetDir) return null;
-
-  const candidate = join(profilesRoot, targetDir, 'cookies.sqlite');
-  return existsSync(candidate) ? candidate : null;
-}
-
-function getFirefoxCookiesPath(profile?: string): string | null {
-  const profilesRoot = getFirefoxProfilesRoot();
-  if (!profilesRoot || !existsSync(profilesRoot)) return null;
-  return pickFirefoxProfile(profilesRoot, profile);
-}
-
-function getSafariCookiesPath(): string | null {
-  if (process.platform !== 'darwin') return null;
-  const home = process.env.HOME || '';
-  const candidates = [
-    join(home, 'Library', 'Cookies', 'Cookies.binarycookies'),
-    join(home, 'Library', 'Containers', 'com.apple.Safari', 'Data', 'Library', 'Cookies', 'Cookies.binarycookies'),
-  ];
-  for (const candidate of candidates) {
-    if (existsSync(candidate)) return candidate;
-  }
-  return null;
-}
-
-const SAFARI_COOKIE_DOMAINS = ['x.com', 'twitter.com'];
-const SAFARI_PAGE_SIGNATURE = Buffer.from([0x00, 0x00, 0x01, 0x00]);
-
-function matchesSafariDomain(domain: string | null): boolean {
-  if (!domain) return false;
-  const normalized = (domain.startsWith('.') ? domain.slice(1) : domain).toLowerCase();
-  return SAFARI_COOKIE_DOMAINS.some((target) => normalized === target || normalized.endsWith(`.${target}`));
-}
-
-function readSafariCString(buffer: Buffer, start: number, end: number): string | null {
-  if (start < 0 || start >= end) return null;
-  let cursor = start;
-  while (cursor < end && buffer[cursor] !== 0) cursor += 1;
-  if (cursor >= end) return null;
-  return buffer.toString('utf8', start, cursor);
-}
-
-function serializeCookieJar(jar: Record<string, string>): string {
-  const entries = Object.entries(jar)
-    .filter(([, value]) => typeof value === 'string' && value.length > 0)
-    .sort(([a], [b]) => a.localeCompare(b));
-  return entries.map(([name, value]) => `${name}=${value}`).join('; ');
-}
-
-function parseSafariCookieRecord(
-  page: Buffer,
-  offset: number,
-  jar: Record<string, string>,
-  cookies: TwitterCookies,
-): void {
-  if (offset < 0 || offset + 4 > page.length) return;
-  const recordSize = page.readUInt32LE(offset);
-  const recordEnd = offset + recordSize;
-  if (recordSize <= 0 || recordEnd > page.length) return;
-
-  const headerStart = offset + 4;
-  const headerSize = 4 + 4 + 4 + 4 + 4 + 4 + 4; // unknown1 + flags + unknown2 + domain + name + path + value
-  if (headerStart + headerSize > recordEnd) return;
-
-  const domainOffset = page.readUInt32LE(headerStart + 12);
-  const nameOffset = page.readUInt32LE(headerStart + 16);
-  const valueOffset = page.readUInt32LE(headerStart + 24);
-
-  const domain = readSafariCString(page, offset + domainOffset, recordEnd);
-  const name = readSafariCString(page, offset + nameOffset, recordEnd);
-  const value = readSafariCString(page, offset + valueOffset, recordEnd);
-
-  if (!name || !value || !matchesSafariDomain(domain)) return;
-
-  const normalizedValue = normalizeValue(value);
-  if (!normalizedValue) return;
-
-  jar[name] = normalizedValue;
-
-  if (name === 'auth_token' && !cookies.authToken) {
-    cookies.authToken = normalizedValue;
-  } else if (name === 'ct0' && !cookies.ct0) {
-    cookies.ct0 = normalizedValue;
-  }
-}
-
-function parseSafariCookiePage(page: Buffer, jar: Record<string, string>, cookies: TwitterCookies): void {
-  if (page.length < 12) return;
-  if (!page.subarray(0, 4).equals(SAFARI_PAGE_SIGNATURE)) return;
-  const cookieCount = page.readUInt32LE(4);
-  if (!cookieCount) return;
-
-  const offsets: number[] = [];
-  let cursor = 8;
-  for (let i = 0; i < cookieCount; i += 1) {
-    if (cursor + 4 > page.length) return;
-    offsets.push(page.readUInt32LE(cursor));
-    cursor += 4;
-  }
-
-  for (const offset of offsets) {
-    parseSafariCookieRecord(page, offset, jar, cookies);
-  }
-}
-
-function parseSafariCookies(data: Buffer, jar: Record<string, string>, cookies: TwitterCookies): void {
-  if (data.length < 8) return;
-  if (data.subarray(0, 4).toString('utf8') !== 'cook') return;
-  const pageCount = data.readUInt32BE(4);
-  let cursor = 8;
-  const pageSizes: number[] = [];
-  for (let i = 0; i < pageCount; i += 1) {
-    if (cursor + 4 > data.length) return;
-    pageSizes.push(data.readUInt32BE(cursor));
-    cursor += 4;
-  }
-
-  for (const pageSize of pageSizes) {
-    if (cursor + pageSize > data.length) return;
-    const page = data.subarray(cursor, cursor + pageSize);
-    parseSafariCookiePage(page, jar, cookies);
-    cursor += pageSize;
-  }
-}
-
-/**
- * Extract Twitter cookies from Safari browser using Cookies.binarycookies
- */
-export async function extractCookiesFromSafari(): Promise<CookieExtractionResult> {
-  const warnings: string[] = [];
-  const cookies: TwitterCookies = {
-    authToken: null,
-    ct0: null,
-    cookieHeader: null,
-    source: null,
-  };
-
-  const cookiesPath = getSafariCookiesPath();
-  if (!cookiesPath) {
-    warnings.push('Safari cookies database not found.');
-    return { cookies, warnings };
-  }
-
-  let tempDir: string | null = null;
-
-  try {
-    const jar: Record<string, string> = {};
-    tempDir = mkdtempSync(join(tmpdir(), 'twitter-cli-'));
-    const tempCookiesPath = join(tempDir, 'Cookies.binarycookies');
-    copyFileSync(cookiesPath, tempCookiesPath);
-    const data = readFileSync(tempCookiesPath);
-    parseSafariCookies(data, jar, cookies);
-    if (Object.keys(jar).length > 0) {
-      cookies.cookieHeader = serializeCookieJar(jar);
-    }
-
-    if (cookies.authToken || cookies.ct0) {
-      cookies.source = 'Safari';
-    }
-  } catch (error) {
-    const message = error instanceof Error ? error.message : String(error);
-    warnings.push(`Failed to read Safari cookies: ${message}`);
-  } finally {
-    if (tempDir) {
-      try {
-        rmSync(tempDir, { recursive: true, force: true });
-      } catch {
-        // ignore cleanup errors
-      }
-    }
-  }
-
-  if (!cookies.authToken && !cookies.ct0) {
-    warnings.push('No Twitter cookies found in Safari. Make sure you are logged into x.com in Safari.');
-  }
-
-  return { cookies, warnings };
-}
-
-/**
- * Decrypt Chrome cookie value using macOS keychain
- * Chrome encrypts cookies with a key stored in the keychain
- */
-function decryptCookieValue(encryptedHex: string): string | null {
-  try {
-    // Convert hex to buffer
-    const encryptedValue = Buffer.from(encryptedHex, 'hex');
-
-    if (encryptedValue.length < 4) {
-      return null;
-    }
-
-    const version = encryptedValue.subarray(0, 3).toString('utf8');
-    if (version !== 'v10' && version !== 'v11') {
-      // Not encrypted, just return as string
-      return encryptedValue.toString('utf8');
-    }
-
-    // Get encryption key from keychain
-    const keyOutput = execSync('security find-generic-password -s "Chrome Safe Storage" -w 2>/dev/null || echo ""', {
-      encoding: 'utf8',
-    }).trim();
-
-    if (!keyOutput) {
-      return null;
-    }
-
-    // Derive the key using PBKDF2
-    const salt = 'saltysalt';
-    const iterations = 1003;
-    const keyLength = 16;
-
-    const derivedKey = pbkdf2Sync(keyOutput, salt, iterations, keyLength, 'sha1');
-
-    // Decrypt using AES-128-CBC with empty IV (16 bytes of 0x20/space)
-    const iv = Buffer.alloc(16, 0x20);
-    const encryptedData = encryptedValue.subarray(3); // Skip "v10" or "v11" prefix
-
-    const decipher = createDecipheriv('aes-128-cbc', derivedKey, iv);
-    decipher.setAutoPadding(true);
-
-    let decrypted = decipher.update(encryptedData);
-    decrypted = Buffer.concat([decrypted, decipher.final()]);
-
-    // Chrome v10 cookies have key material prepended before the actual value
-    // Twitter cookies are hex strings, so extract the longest hex sequence
-    const decryptedStr = decrypted.toString('utf8');
-    const hexMatch = decryptedStr.match(/[a-f0-9]{32,}/i);
-    if (hexMatch) {
-      return hexMatch[0];
-    }
-    // Fallback: keep only printable ASCII characters
-    return decryptedStr.replace(/[^\x20-\x7E]/g, '');
-  } catch {
     return null;
   }
+  const trimmed = value.trim();
+  return trimmed.length > 0 ? trimmed : null;
 }
 
-/**
+function cookieHeader(authToken: string, ct0: string): string {
- * Extract Twitter cookies from Chrome browser using sqlite3 CLI
+  return `auth_token=${authToken}; ct0=${ct0}`;
- * @param profile - Chrome profile name (optional, uses Default if not specified)
+}
- */
+
-export async function extractCookiesFromChrome(profile?: string): Promise<CookieExtractionResult> {
+function buildEmpty(): TwitterCookies {
+  return { authToken: null, ct0: null, cookieHeader: null, source: null };
+}
+
+function readEnvCookie(cookies: TwitterCookies, keys: readonly string[], field: 'authToken' | 'ct0'): void {
+  if (cookies[field]) {
+    return;
+  }
+  for (const key of keys) {
+    const value = normalizeValue(process.env[key]);
+    if (!value) {
+      continue;
+    }
+    cookies[field] = value;
+    if (!cookies.source) {
+      cookies.source = `env ${key}`;
+    }
+    break;
+  }
+}
+
+function resolveSources(cookieSource?: CookieSource | CookieSource[]): CookieSource[] {
+  if (Array.isArray(cookieSource)) {
+    return cookieSource;
+  }
+  if (cookieSource) {
+    return [cookieSource];
+  }
+  return ['safari', 'chrome', 'firefox'];
+}
+
+function labelForSource(source: CookieSource, profile?: string): string {
+  if (source === 'safari') {
+    return 'Safari';
+  }
+  if (source === 'chrome') {
+    return profile ? `Chrome profile "${profile}"` : 'Chrome default profile';
+  }
+  return profile ? `Firefox profile "${profile}"` : 'Firefox default profile';
+}
+
+function pickCookieValue(
+  cookies: Array<{ name?: string; value?: string; domain?: string }>,
+  name: (typeof TWITTER_COOKIE_NAMES)[number],
+): string | null {
+  const matches = cookies.filter((c) => c?.name === name && typeof c.value === 'string');
+  if (matches.length === 0) {
+    return null;
+  }
+
+  const preferred = matches.find((c) => (c.domain ?? '').endsWith('x.com'));
+  if (preferred?.value) {
+    return preferred.value;
+  }
+
+  const twitter = matches.find((c) => (c.domain ?? '').endsWith('twitter.com'));
+  if (twitter?.value) {
+    return twitter.value;
+  }
+
+  return matches[0]?.value ?? null;
+}
+
+async function readTwitterCookiesFromBrowser(options: {
+  source: CookieSource;
+  chromeProfile?: string;
+  firefoxProfile?: string;
+}): Promise<CookieExtractionResult> {
   const warnings: string[] = [];
-  const cookies: TwitterCookies = {
+  const out = buildEmpty();
-    authToken: null,
-    ct0: null,
-    cookieHeader: null,
-    source: null,
-  };
 
-  const cookiesPath = getChromeCookiesPath(profile);
+  const { cookies, warnings: providerWarnings } = await getCookies({
+    url: TWITTER_URL,
+    origins: TWITTER_ORIGINS,
+    names: [...TWITTER_COOKIE_NAMES],
+    browsers: [options.source],
+    mode: 'merge',
+    chromeProfile: options.chromeProfile,
+    firefoxProfile: options.firefoxProfile,
+  });
+  warnings.push(...providerWarnings);
 
-  if (!existsSync(cookiesPath)) {
+  const authToken = pickCookieValue(cookies, 'auth_token');
-    warnings.push(`Chrome cookies database not found at: ${cookiesPath}`);
+  const ct0 = pickCookieValue(cookies, 'ct0');
-    return { cookies, warnings };
+  if (authToken) {
+    out.authToken = authToken;
+  }
+  if (ct0) {
+    out.ct0 = ct0;
   }
 
-  // Chrome locks the database, so we need to copy it
+  if (out.authToken && out.ct0) {
-  let tempDir: string | null = null;
+    out.cookieHeader = cookieHeader(out.authToken, out.ct0);
-
+    out.source = labelForSource(
-  try {
+      options.source,
-    tempDir = mkdtempSync(join(tmpdir(), 'twitter-cli-'));
+      options.source === 'chrome' ? options.chromeProfile : options.firefoxProfile,
-    const tempDbPath = join(tempDir, 'Cookies');
+    );
-    copyFileSync(cookiesPath, tempDbPath);
+    return { cookies: out, warnings };
-
-    // Also copy the WAL and SHM files if they exist
-    const walPath = `${cookiesPath}-wal`;
-    const shmPath = `${cookiesPath}-shm`;
-    if (existsSync(walPath)) {
-      copyFileSync(walPath, `${tempDbPath}-wal`);
-    }
-    if (existsSync(shmPath)) {
-      copyFileSync(shmPath, `${tempDbPath}-shm`);
-    }
-
-    const jar: Record<string, string> = {};
-
-    // Use sqlite3 CLI to query cookies (no native deps required!)
-    const query = `SELECT name, hex(encrypted_value) as encrypted_hex FROM cookies WHERE host_key IN ('.x.com', '.twitter.com', 'x.com', 'twitter.com');`;
-
-    const result = execSync(`sqlite3 -separator '|' "${tempDbPath}" "${query}"`, {
-      encoding: 'utf8',
-      maxBuffer: 1024 * 1024,
-    }).trim();
-
-    if (result) {
-      for (const line of result.split('\n')) {
-        const [name, encryptedHex] = line.split('|');
-        if (!name || !encryptedHex) continue;
-
-        const decryptedValue = decryptCookieValue(encryptedHex);
-        if (decryptedValue) {
-          jar[name] = decryptedValue;
-          if (name === 'auth_token' && !cookies.authToken) {
-            cookies.authToken = decryptedValue;
-          } else if (name === 'ct0' && !cookies.ct0) {
-            cookies.ct0 = decryptedValue;
-          }
-        }
-      }
-    }
-
-    if (Object.keys(jar).length > 0) {
-      cookies.cookieHeader = serializeCookieJar(jar);
-    }
-
-    if (cookies.authToken || cookies.ct0) {
-      cookies.source = profile ? `Chrome profile "${profile}"` : 'Chrome default profile';
-    }
-  } catch (error) {
-    const message = error instanceof Error ? error.message : String(error);
-    warnings.push(`Failed to read Chrome cookies: ${message}`);
-  } finally {
-    // Cleanup temp files
-    if (tempDir) {
-      try {
-        rmSync(tempDir, { recursive: true, force: true });
-      } catch {
-        // Ignore cleanup errors
-      }
-    }
   }
 
-  if (!cookies.authToken && !cookies.ct0) {
+  if (options.source === 'safari') {
+    warnings.push('No Twitter cookies found in Safari. Make sure you are logged into x.com in Safari.');
+  } else if (options.source === 'chrome') {
     warnings.push('No Twitter cookies found in Chrome. Make sure you are logged into x.com in Chrome.');
-  }
+  } else {
-
-  return { cookies, warnings };
-}
-
-/**
- * Extract Twitter cookies from Firefox browser using sqlite3 CLI
- * @param profile - Firefox profile directory name (optional, auto-detected)
- */
-export async function extractCookiesFromFirefox(profile?: string): Promise<CookieExtractionResult> {
-  const warnings: string[] = [];
-  const cookies: TwitterCookies = {
-    authToken: null,
-    ct0: null,
-    cookieHeader: null,
-    source: null,
-  };
-
-  const cookiesPath = getFirefoxCookiesPath(profile);
-
-  if (!cookiesPath) {
-    warnings.push('Firefox cookies database not found.');
-    return { cookies, warnings };
-  }
-
-  let tempDir: string | null = null;
-
-  try {
-    tempDir = mkdtempSync(join(tmpdir(), 'twitter-cli-'));
-    const tempDbPath = join(tempDir, 'cookies.sqlite');
-    copyFileSync(cookiesPath, tempDbPath);
-
-    const jar: Record<string, string> = {};
-
-    const query = `SELECT name, value FROM moz_cookies WHERE host IN ('.x.com', '.twitter.com', 'x.com', 'twitter.com');`;
-
-    const result = execSync(`sqlite3 -separator '|' "${tempDbPath}" "${query}"`, {
-      encoding: 'utf8',
-      maxBuffer: 1024 * 1024,
-    }).trim();
-
-    if (result) {
-      for (const line of result.split('\n')) {
-        const [name, value] = line.split('|');
-        if (!name || !value) continue;
-        jar[name] = value;
-        if (name === 'auth_token' && !cookies.authToken) {
-          cookies.authToken = value;
-        } else if (name === 'ct0' && !cookies.ct0) {
-          cookies.ct0 = value;
-        }
-      }
-    }
-
-    if (Object.keys(jar).length > 0) {
-      cookies.cookieHeader = serializeCookieJar(jar);
-    }
-
-    if (cookies.authToken || cookies.ct0) {
-      cookies.source = profile ? `Firefox profile "${profile}"` : 'Firefox default profile';
-    }
-  } catch (error) {
-    const message = error instanceof Error ? error.message : String(error);
-    warnings.push(`Failed to read Firefox cookies: ${message}`);
-  } finally {
-    if (tempDir) {
-      try {
-        rmSync(tempDir, { recursive: true, force: true });
-      } catch {
-        // ignore cleanup errors
-      }
-    }
-  }
-
-  if (!cookies.authToken && !cookies.ct0) {
     warnings.push(
       'No Twitter cookies found in Firefox. Make sure you are logged into x.com in Firefox and the profile exists.',
     );
   }
 
-  return { cookies, warnings };
+  return { cookies: out, warnings };
+}
+
+export async function extractCookiesFromSafari(): Promise<CookieExtractionResult> {
+  return readTwitterCookiesFromBrowser({ source: 'safari' });
+}
+
+export async function extractCookiesFromChrome(profile?: string): Promise<CookieExtractionResult> {
+  return readTwitterCookiesFromBrowser({ source: 'chrome', chromeProfile: profile });
+}
+
+export async function extractCookiesFromFirefox(profile?: string): Promise<CookieExtractionResult> {
+  return readTwitterCookiesFromBrowser({ source: 'firefox', firefoxProfile: profile });
 }
 
 /**
- * Resolve Twitter credentials from multiple sources
+ * Resolve Twitter credentials from multiple sources.
- * Priority: CLI args > environment variables > Safari > Chrome > Firefox
+ * Priority: CLI args > environment variables > browsers (ordered).
  */
 export async function resolveCredentials(options: {
   authToken?: string;
@@ -483,91 +172,40 @@ export async function resolveCredentials(options: {
   firefoxProfile?: string;
 }): Promise<CookieExtractionResult> {
   const warnings: string[] = [];
-  const cookies: TwitterCookies = {
+  const cookies = buildEmpty();
-    authToken: null,
-    ct0: null,
-    cookieHeader: null,
-    source: null,
-  };
 
-  const cookieSource = options.cookieSource;
-
-  // 1. CLI arguments (highest priority)
   if (options.authToken) {
     cookies.authToken = options.authToken;
     cookies.source = 'CLI argument';
   }
   if (options.ct0) {
     cookies.ct0 = options.ct0;
-    if (!cookies.source) cookies.source = 'CLI argument';
+    if (!cookies.source) {
-  }
+      cookies.source = 'CLI argument';
-
-  // 2. Environment variables
-  const envAuthKeys = ['AUTH_TOKEN', 'TWITTER_AUTH_TOKEN'];
-  const envCt0Keys = ['CT0', 'TWITTER_CT0'];
-
-  if (!cookies.authToken) {
-    for (const key of envAuthKeys) {
-      const value = normalizeValue(process.env[key]);
-      if (value) {
-        cookies.authToken = value;
-        cookies.source = `env ${key}`;
-        break;
-      }
     }
   }
 
-  if (!cookies.ct0) {
+  readEnvCookie(cookies, ['AUTH_TOKEN', 'TWITTER_AUTH_TOKEN'], 'authToken');
-    for (const key of envCt0Keys) {
+  readEnvCookie(cookies, ['CT0', 'TWITTER_CT0'], 'ct0');
-      const value = normalizeValue(process.env[key]);
-      if (value) {
-        cookies.ct0 = value;
-        if (!cookies.source) cookies.source = `env ${key}`;
-        break;
-      }
-    }
-  }
 
   if (cookies.authToken && cookies.ct0) {
-    cookies.cookieHeader = `auth_token=${cookies.authToken}; ct0=${cookies.ct0}`;
+    cookies.cookieHeader = cookieHeader(cookies.authToken, cookies.ct0);
     return { cookies, warnings };
   }
 
-  const sourcesToTry: CookieSource[] = Array.isArray(cookieSource)
+  const sourcesToTry = resolveSources(options.cookieSource);
-    ? cookieSource
-    : cookieSource
-      ? [cookieSource]
-      : ['safari', 'chrome', 'firefox'];
-
   for (const source of sourcesToTry) {
-    if (source === 'safari') {
+    const res = await readTwitterCookiesFromBrowser({
-      const safariResult = await extractCookiesFromSafari();
+      source,
-      warnings.push(...safariResult.warnings);
+      chromeProfile: options.chromeProfile,
-      if (safariResult.cookies.authToken && safariResult.cookies.ct0) {
+      firefoxProfile: options.firefoxProfile,
-        return { cookies: safariResult.cookies, warnings };
+    });
-      }
+    warnings.push(...res.warnings);
-      continue;
+    if (res.cookies.authToken && res.cookies.ct0) {
-    }
+      return { cookies: res.cookies, warnings };
-
-    if (source === 'chrome') {
-      const chromeResult = await extractCookiesFromChrome(options.chromeProfile);
-      warnings.push(...chromeResult.warnings);
-      if (chromeResult.cookies.authToken && chromeResult.cookies.ct0) {
-        return { cookies: chromeResult.cookies, warnings };
-      }
-      continue;
-    }
-
-    if (source === 'firefox') {
-      const firefoxResult = await extractCookiesFromFirefox(options.firefoxProfile);
-      warnings.push(...firefoxResult.warnings);
-      if (firefoxResult.cookies.authToken && firefoxResult.cookies.ct0) {
-        return { cookies: firefoxResult.cookies, warnings };
-      }
     }
   }
 
-  // Validation
   if (!cookies.authToken) {
     warnings.push(
       'Missing auth_token - provide via --auth-token, AUTH_TOKEN env var, or login to x.com in Safari/Chrome/Firefox',
@@ -576,9 +214,8 @@ export async function resolveCredentials(options: {
   if (!cookies.ct0) {
     warnings.push('Missing ct0 - provide via --ct0, CT0 env var, or login to x.com in Safari/Chrome/Firefox');
   }
-
   if (cookies.authToken && cookies.ct0) {
-    cookies.cookieHeader = `auth_token=${cookies.authToken}; ct0=${cookies.ct0}`;
+    cookies.cookieHeader = cookieHeader(cookies.authToken, cookies.ct0);
   }
 
   return { cookies, warnings };

src/lib/extract-tweet-id.ts

@@ -1,9 +1,11 @@
 /**
  * Extract tweet ID from a Twitter/X URL or return the input unchanged if it's already an ID.
  */
+const TWEET_URL_REGEX = /(?:twitter\.com|x\.com)\/\w+\/status\/(\d+)/;
+
 export function extractTweetId(input: string): string {
   // If it's a URL, extract the tweet ID
-  const urlMatch = input.match(/(?:twitter\.com|x\.com)\/\w+\/status\/(\d+)/);
+  const urlMatch = TWEET_URL_REGEX.exec(input);
   if (urlMatch) {
     return urlMatch[1];
   }

src/lib/normalize-handle.ts

@@ -1,13 +1,21 @@
+const HANDLE_REGEX = /^[A-Za-z0-9_]{1,15}$/;
+
 export function normalizeHandle(input?: string | null): string | null {
   const raw = (input ?? '').trim();
-  if (!raw) return null;
+  if (!raw) {
+    return null;
+  }
 
   const withoutAt = raw.startsWith('@') ? raw.slice(1) : raw;
   const handle = withoutAt.trim();
-  if (!handle) return null;
+  if (!handle) {
+    return null;
+  }
 
   // X/Twitter handles are traditionally max 15 chars; keep strict to avoid surprising queries.
-  if (!/^[A-Za-z0-9_]{1,15}$/.test(handle)) return null;
+  if (!HANDLE_REGEX.test(handle)) {
+    return null;
+  }
 
   return handle;
 }
@@ -16,7 +24,9 @@ export function mentionsQueryFromUserOption(userOption?: string | null): {
   query: string | null;
   error: string | null;
 } {
-  if (typeof userOption === 'undefined') return { query: null, error: null };
+  if (typeof userOption === 'undefined') {
+    return { query: null, error: null };
+  }
 
   const handle = normalizeHandle(userOption);
   if (!handle) {

src/lib/output.ts

@@ -53,14 +53,22 @@ export function resolveOutputConfigFromCommander(
 }
 
 export function statusPrefix(kind: StatusKind, cfg: OutputConfig): string {
-  if (cfg.plain) return `${STATUS[kind].plain} `;
+  if (cfg.plain) {
-  if (cfg.emoji) return `${STATUS[kind].emoji} `;
+    return `${STATUS[kind].plain} `;
+  }
+  if (cfg.emoji) {
+    return `${STATUS[kind].emoji} `;
+  }
   return `${STATUS[kind].text} `;
 }
 
 export function labelPrefix(kind: LabelKind, cfg: OutputConfig): string {
-  if (cfg.plain) return `${LABELS[kind].plain} `;
+  if (cfg.plain) {
-  if (cfg.emoji) return `${LABELS[kind].emoji} `;
+    return `${LABELS[kind].plain} `;
+  }
+  if (cfg.emoji) {
+    return `${LABELS[kind].emoji} `;
+  }
   return `${LABELS[kind].text} `;
 }
 
@@ -72,8 +80,12 @@ export function formatStatsLine(
   const retweetCount = stats.retweetCount ?? 0;
   const replyCount = stats.replyCount ?? 0;
 
-  if (cfg.plain) return `likes: ${likeCount}  retweets: ${retweetCount}  replies: ${replyCount}`;
+  if (cfg.plain) {
-  if (!cfg.emoji) return `Likes ${likeCount}  Retweets ${retweetCount}  Replies ${replyCount}`;
+    return `likes: ${likeCount}  retweets: ${retweetCount}  replies: ${replyCount}`;
+  }
+  if (!cfg.emoji) {
+    return `Likes ${likeCount}  Retweets ${retweetCount}  Replies ${replyCount}`;
+  }
   return `❤️ ${likeCount}  🔁 ${retweetCount}  💬 ${replyCount}`;
 }
 

src/lib/runtime-query-ids.ts

@@ -3,9 +3,9 @@ import { homedir } from 'node:os';
 import path from 'node:path';
 
 const DEFAULT_CACHE_FILENAME = 'query-ids-cache.json';
-const DEFAULT_TTL_MS = 24 * 60 * 60 * 1000;
+const DEFAULT_TTL_MS: number = 24 * 60 * 60 * 1000;
 
-const DISCOVERY_PAGES = [
+const DISCOVERY_PAGES: string[] = [
   'https://x.com/?lang=en',
   'https://x.com/explore',
   'https://x.com/notifications',
@@ -13,6 +13,7 @@ const DISCOVERY_PAGES = [
 ];
 
 const BUNDLE_URL_REGEX = /https:\/\/abs\.twimg\.com\/responsive-web\/client-web(?:-legacy)?\/[A-Za-z0-9.-]+\.js/g;
+const QUERY_ID_REGEX = /^[a-zA-Z0-9_-]+$/;
 
 const OPERATION_PATTERNS = [
   {
@@ -67,6 +68,15 @@ export type RuntimeQueryIdsOptions = {
   fetchImpl?: typeof fetch;
 };
 
+export type RuntimeQueryIdStore = {
+  cachePath: string;
+  ttlMs: number;
+  getSnapshotInfo: () => Promise<RuntimeQueryIdSnapshotInfo | null>;
+  getQueryId: (operationName: string) => Promise<string | null>;
+  refresh: (operationNames: string[], opts?: { force?: boolean }) => Promise<RuntimeQueryIdSnapshotInfo | null>;
+  clearMemory: () => void;
+};
+
 async function fetchText(fetchImpl: typeof fetch, url: string): Promise<string> {
   const response = await fetchImpl(url, { headers: HEADERS });
   if (!response.ok) {
@@ -85,7 +95,9 @@ function resolveDefaultCachePath(): string {
 }
 
 function parseSnapshot(raw: unknown): RuntimeQueryIdSnapshot | null {
-  if (!raw || typeof raw !== 'object') return null;
+  if (!raw || typeof raw !== 'object') {
+    return null;
+  }
   const record = raw as Record<string, unknown>;
   const fetchedAt = typeof record.fetchedAt === 'string' ? record.fetchedAt : null;
   const ttlMs = typeof record.ttlMs === 'number' && Number.isFinite(record.ttlMs) ? record.ttlMs : null;
@@ -93,10 +105,14 @@ function parseSnapshot(raw: unknown): RuntimeQueryIdSnapshot | null {
   const discovery =
     record.discovery && typeof record.discovery === 'object' ? (record.discovery as Record<string, unknown>) : null;
 
-  if (!fetchedAt || !ttlMs || !ids || !discovery) return null;
+  if (!fetchedAt || !ttlMs || !ids || !discovery) {
+    return null;
+  }
   const pages = Array.isArray(discovery.pages) ? discovery.pages : null;
   const bundles = Array.isArray(discovery.bundles) ? discovery.bundles : null;
-  if (!pages || !bundles) return null;
+  if (!pages || !bundles) {
+    return null;
+  }
 
   const normalizedIds: Record<string, string> = {};
   for (const [key, value] of Object.entries(ids)) {
@@ -120,9 +136,7 @@ async function readSnapshotFromDisk(cachePath: string): Promise<RuntimeQueryIdSn
   try {
     const raw = await readFile(cachePath, 'utf8');
     return parseSnapshot(JSON.parse(raw));
-  } catch (error) {
+  } catch {
-    const code = error && typeof error === 'object' ? String((error as { code?: unknown }).code ?? '') : '';
-    if (code !== 'ENOENT') return null;
     return null;
   }
 }
@@ -161,15 +175,27 @@ function extractOperations(
     pattern.regex.lastIndex = 0;
     while (true) {
       const match = pattern.regex.exec(bundleContents);
-      if (match === null) break;
+      if (match === null) {
+        break;
+      }
       const operationName = match[pattern.operationGroup];
       const queryId = match[pattern.queryIdGroup];
-      if (!operationName || !queryId) continue;
+      if (!operationName || !queryId) {
-      if (!targets.has(operationName)) continue;
+        continue;
-      if (!/^[a-zA-Z0-9_-]+$/.test(queryId)) continue;
+      }
-      if (discovered.has(operationName)) continue;
+      if (!targets.has(operationName)) {
+        continue;
+      }
+      if (!QUERY_ID_REGEX.test(queryId)) {
+        continue;
+      }
+      if (discovered.has(operationName)) {
+        continue;
+      }
       discovered.set(operationName, { queryId, bundle: bundleLabel });
-      if (discovered.size === targets.size) return;
+      if (discovered.size === targets.size) {
+        return;
+      }
     }
   }
 }
@@ -186,7 +212,9 @@ async function fetchAndExtract(
     const chunk = bundleUrls.slice(i, i + CONCURRENCY);
     await Promise.all(
       chunk.map(async (url) => {
-        if (discovered.size === targets.size) return;
+        if (discovered.size === targets.size) {
+          return;
+        }
         const label = url.split('/').at(-1) ?? url;
         try {
           const js = await fetchText(fetchImpl, url);
@@ -196,13 +224,15 @@ async function fetchAndExtract(
         }
       }),
     );
-    if (discovered.size === targets.size) break;
+    if (discovered.size === targets.size) {
+      break;
+    }
   }
 
   return discovered;
 }
 
-export function createRuntimeQueryIdStore(options: RuntimeQueryIdsOptions = {}) {
+export function createRuntimeQueryIdStore(options: RuntimeQueryIdsOptions = {}): RuntimeQueryIdStore {
   const fetchImpl = options.fetchImpl ?? fetch;
   const ttlMs = options.ttlMs ?? DEFAULT_TTL_MS;
   const cachePath = options.cachePath ? path.resolve(options.cachePath) : resolveDefaultCachePath();
@@ -212,7 +242,9 @@ export function createRuntimeQueryIdStore(options: RuntimeQueryIdsOptions = {})
   let refreshInFlight: Promise<RuntimeQueryIdSnapshotInfo | null> | null = null;
 
   const loadSnapshot = async (): Promise<RuntimeQueryIdSnapshot | null> => {
-    if (memorySnapshot) return memorySnapshot;
+    if (memorySnapshot) {
+      return memorySnapshot;
+    }
     if (!loadOnce) {
       loadOnce = (async () => {
         const fromDisk = await readSnapshotFromDisk(cachePath);
@@ -225,7 +257,9 @@ export function createRuntimeQueryIdStore(options: RuntimeQueryIdsOptions = {})
 
   const getSnapshotInfo = async (): Promise<RuntimeQueryIdSnapshotInfo | null> => {
     const snapshot = await loadSnapshot();
-    if (!snapshot) return null;
+    if (!snapshot) {
+      return null;
+    }
     const fetchedAtMs = new Date(snapshot.fetchedAt).getTime();
     const ageMs = Number.isFinite(fetchedAtMs) ? Math.max(0, Date.now() - fetchedAtMs) : Number.POSITIVE_INFINITY;
     const effectiveTtl = Number.isFinite(snapshot.ttlMs) ? snapshot.ttlMs : ttlMs;
@@ -235,7 +269,9 @@ export function createRuntimeQueryIdStore(options: RuntimeQueryIdsOptions = {})
 
   const getQueryId = async (operationName: string): Promise<string | null> => {
     const info = await getSnapshotInfo();
-    if (!info) return null;
+    if (!info) {
+      return null;
+    }
     return info.snapshot.ids[operationName] ?? null;
   };
 
@@ -243,7 +279,9 @@ export function createRuntimeQueryIdStore(options: RuntimeQueryIdsOptions = {})
     operationNames: string[],
     opts: { force?: boolean } = {},
   ): Promise<RuntimeQueryIdSnapshotInfo | null> => {
-    if (refreshInFlight) return refreshInFlight;
+    if (refreshInFlight) {
+      return refreshInFlight;
+    }
 
     refreshInFlight = (async () => {
       const current = await getSnapshotInfo();

src/lib/twitter-client.ts

@@ -4,6 +4,7 @@
 
 import { randomBytes, randomUUID } from 'node:crypto';
 import type { TwitterCookies } from './cookies.js';
+// biome-ignore lint/correctness/useImportExtensions: JSON module import doesn't use .js extension.
 import queryIds from './query-ids.json' with { type: 'json' };
 import { runtimeQueryIds } from './runtime-query-ids.js';
 
@@ -12,6 +13,9 @@ const TWITTER_GRAPHQL_POST_URL = 'https://x.com/i/api/graphql';
 const TWITTER_UPLOAD_URL = 'https://upload.twitter.com/i/media/upload.json';
 const TWITTER_MEDIA_METADATA_URL = 'https://x.com/i/api/1.1/media/metadata/create.json';
 const TWITTER_STATUS_UPDATE_URL = 'https://x.com/i/api/1.1/statuses/update.json';
+const SETTINGS_SCREEN_NAME_REGEX = /"screen_name":"([^"]+)"/;
+const SETTINGS_USER_ID_REGEX = /"user_id"\s*:\s*"(\d+)"/;
+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
@@ -23,6 +27,7 @@ const FALLBACK_QUERY_IDS = {
   TweetDetail: '97JF30KziU00483E_8elBA',
   SearchTimeline: 'M1jEez78PEfVfbQLvlWMvQ',
   UserArticlesTweets: '8zBy9h4L90aDL02RsBcCFg',
+  Bookmarks: 'RV1g3b8n_SGOHwkqKYSCFw',
 } as const;
 
 type OperationName = keyof typeof FALLBACK_QUERY_IDS;
@@ -338,7 +343,9 @@ export class TwitterClient {
       | undefined,
     tweetId: string,
   ) {
-    if (!instructions) return undefined;
+    if (!instructions) {
+      return undefined;
+    }
 
     for (const instruction of instructions) {
       for (const entry of instruction.entries || []) {
@@ -400,10 +407,14 @@ export class TwitterClient {
 
   private mediaCategoryForMime(mimeType: string): string | null {
     if (mimeType.startsWith('image/')) {
-      if (mimeType === 'image/gif') return 'tweet_gif';
+      if (mimeType === 'image/gif') {
+        return 'tweet_gif';
+      }
       return 'tweet_image';
     }
-    if (mimeType.startsWith('video/')) return 'tweet_video';
+    if (mimeType.startsWith('video/')) {
+      return 'tweet_video';
+    }
     return null;
   }
 
@@ -413,7 +424,9 @@ export class TwitterClient {
 
   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}` };
+    if (!category) {
+      return { success: false, error: `Unsupported media type: ${input.mimeType}` };
+    }
 
     try {
       const initParams = new URLSearchParams({
@@ -441,7 +454,9 @@ export class TwitterClient {
           : initBody.media_id !== undefined
             ? String(initBody.media_id)
             : undefined;
-      if (!mediaId) return { success: false, error: 'Media upload INIT did not return media_id' };
+      if (!mediaId) {
+        return { success: false, error: 'Media upload INIT did not return media_id' };
+      }
 
       const chunkSize = 5 * 1024 * 1024;
       let segmentIndex = 0;
@@ -497,7 +512,10 @@ export class TwitterClient {
           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 })}`;
+          const statusUrl = `${TWITTER_UPLOAD_URL}?${new URLSearchParams({
+            command: 'STATUS',
+            media_id: mediaId,
+          }).toString()}`;
           const statusResp = await this.fetchWithTimeout(statusUrl, {
             method: 'GET',
             headers: this.getUploadHeaders(),
@@ -515,11 +533,15 @@ export class TwitterClient {
               error?: { message?: string; name?: string };
             };
           };
-          if (!statusBody.processing_info) break;
+          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;
+          if (info.state === 'succeeded') {
+            break;
+          }
           attempts += 1;
         }
       }
@@ -546,15 +568,21 @@ export class TwitterClient {
     for (const value of values) {
       if (typeof value === 'string') {
         const trimmed = value.trim();
-        if (trimmed) return trimmed;
+        if (trimmed) {
+          return trimmed;
+        }
       }
     }
     return undefined;
   }
 
   private collectTextFields(value: unknown, keys: Set<string>, output: string[]): void {
-    if (!value) return;
+    if (!value) {
-    if (typeof value === 'string') return;
+      return;
+    }
+    if (typeof value === 'string') {
+      return;
+    }
 
     if (Array.isArray(value)) {
       for (const item of value) {
@@ -568,7 +596,9 @@ export class TwitterClient {
         if (keys.has(key)) {
           if (typeof nested === 'string') {
             const trimmed = nested.trim();
-            if (trimmed) output.push(trimmed);
+            if (trimmed) {
+              output.push(trimmed);
+            }
             continue;
           }
         }
@@ -581,7 +611,9 @@ export class TwitterClient {
     const seen = new Set<string>();
     const result: string[] = [];
     for (const value of values) {
-      if (seen.has(value)) continue;
+      if (seen.has(value)) {
+        continue;
+      }
       seen.add(value);
       result.push(value);
     }
@@ -590,7 +622,9 @@ export class TwitterClient {
 
   private extractArticleText(result: GraphqlTweetResult | undefined): string | undefined {
     const article = result?.article;
-    if (!article) return undefined;
+    if (!article) {
+      return undefined;
+    }
 
     const articleResult = article.article_results?.result ?? article;
     if (process.env.BIRD_DEBUG_ARTICLE === '1') {
@@ -655,7 +689,9 @@ export class TwitterClient {
 
   private extractNoteTweetText(result: GraphqlTweetResult | undefined): string | undefined {
     const note = result?.note_tweet?.note_tweet_results?.result;
-    if (!note) return undefined;
+    if (!note) {
+      return undefined;
+    }
 
     return this.firstText(
       note.text,
@@ -680,10 +716,14 @@ export class TwitterClient {
     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;
+    if (!result?.rest_id || !username) {
+      return undefined;
+    }
 
     const text = this.extractTweetText(result);
-    if (!text) return undefined;
+    if (!text) {
+      return undefined;
+    }
 
     return {
       id: result.rest_id,
@@ -741,7 +781,9 @@ export class TwitterClient {
   }): GraphqlTweetResult[] {
     const results: GraphqlTweetResult[] = [];
     const pushResult = (result?: GraphqlTweetResult) => {
-      if (result?.rest_id) results.push(result);
+      if (result?.rest_id) {
+        results.push(result);
+      }
     };
 
     const content = entry.content;
@@ -808,7 +850,9 @@ export class TwitterClient {
         const results = this.collectTweetResultsFromEntry(entry);
         for (const result of results) {
           const mapped = this.mapTweetResult(result);
-          if (!mapped || seen.has(mapped.id)) continue;
+          if (!mapped || seen.has(mapped.id)) {
+            continue;
+          }
           seen.add(mapped.id);
           tweets.push(mapped);
         }
@@ -955,7 +999,7 @@ export class TwitterClient {
     });
 
     const queryId = await this.getQueryId('UserArticlesTweets');
-    const url = `${TWITTER_API_BASE}/${queryId}/UserArticlesTweets?${params}`;
+    const url = `${TWITTER_API_BASE}/${queryId}/UserArticlesTweets?${params.toString()}`;
 
     try {
       const response = await this.fetchWithTimeout(url, { method: 'GET', headers: this.getHeaders() });
@@ -989,7 +1033,9 @@ export class TwitterClient {
       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;
+          if (result?.rest_id !== tweetId) {
+            continue;
+          }
           const articleResult = result.article?.article_results?.result;
           const title = this.firstText(articleResult?.title, result.article?.title);
           const plainText = this.firstText(articleResult?.plain_text, result.article?.plain_text);
@@ -1098,7 +1144,7 @@ export class TwitterClient {
         const queryIds = await this.getTweetDetailQueryIds();
 
         for (const queryId of queryIds) {
-          const url = `${TWITTER_API_BASE}/${queryId}/TweetDetail?${params}`;
+          const url = `${TWITTER_API_BASE}/${queryId}/TweetDetail?${params.toString()}`;
           const response = await this.fetchWithTimeout(url, {
             method: 'GET',
             headers: this.getHeaders(),
@@ -1351,12 +1397,16 @@ export class TwitterClient {
 
           if (data.errors && data.errors.length > 0) {
             const fallback = await this.tryStatusUpdateFallback(data.errors, variables);
-            if (fallback) return fallback;
+            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 };
+          if (tweetId) {
+            return { success: true, tweetId };
+          }
 
           return { success: false, error: 'Tweet created but no ID returned' };
         }
@@ -1374,7 +1424,9 @@ export class TwitterClient {
 
       if (data.errors && data.errors.length > 0) {
         const fallback = await this.tryStatusUpdateFallback(data.errors, variables);
-        if (fallback) return fallback;
+        if (fallback) {
+          return fallback;
+        }
         return {
           success: false,
           error: this.formatErrors(data.errors),
@@ -1413,7 +1465,9 @@ export class TwitterClient {
     mediaIds?: string[];
   } | null {
     const text = typeof variables.tweet_text === 'string' ? variables.tweet_text : null;
-    if (!text) return null;
+    if (!text) {
+      return null;
+    }
 
     const reply = variables.reply;
     const inReplyToTweetId =
@@ -1485,7 +1539,9 @@ export class TwitterClient {
       const tweetId =
         typeof data.id_str === 'string' ? data.id_str : data.id !== undefined ? String(data.id) : undefined;
 
-      if (tweetId) return { success: true, tweetId };
+      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) };
@@ -1496,12 +1552,18 @@ export class TwitterClient {
     errors: Array<{ message: string; code?: number }>,
     variables: Record<string, unknown>,
   ): Promise<TweetResult | null> {
-    if (!errors.some((error) => error.code === 226)) return null;
+    if (!errors.some((error) => error.code === 226)) {
+      return null;
+    }
     const input = this.statusUpdateInputFromCreateTweetVariables(variables);
-    if (!input) return null;
+    if (!input) {
+      return null;
+    }
 
     const fallback = await this.postStatusUpdate(input);
-    if (fallback.success) return fallback;
+    if (fallback.success) {
+      return fallback;
+    }
 
     return {
       success: false,
@@ -1510,8 +1572,12 @@ export class TwitterClient {
   }
 
   private async ensureClientUserId(): Promise<void> {
-    if (process.env.NODE_ENV === 'test') return;
+    if (process.env.NODE_ENV === 'test') {
-    if (this.clientUserId) return;
+      return;
+    }
+    if (this.clientUserId) {
+      return;
+    }
     const result = await this.getCurrentUser();
     if (result.success && result.user?.id) {
       this.clientUserId = result.user.id;
@@ -1541,7 +1607,7 @@ export class TwitterClient {
       const queryIds = await this.getSearchTimelineQueryIds();
 
       for (const queryId of queryIds) {
-        const url = `${TWITTER_API_BASE}/${queryId}/SearchTimeline?${params}`;
+        const url = `${TWITTER_API_BASE}/${queryId}/SearchTimeline?${params.toString()}`;
 
         try {
           const response = await this.fetchWithTimeout(url, {
@@ -1621,12 +1687,16 @@ export class TwitterClient {
     };
 
     const firstAttempt = await tryOnce();
-    if (firstAttempt.success) return { success: true, tweets: firstAttempt.tweets };
+    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 };
+      if (secondAttempt.success) {
+        return { success: true, tweets: secondAttempt.tweets };
+      }
       return { success: false, error: secondAttempt.error };
     }
 
@@ -1728,9 +1798,9 @@ export class TwitterClient {
         }
 
         const html = await response.text();
-        const usernameMatch = html.match(/"screen_name":"([^"]+)"/);
+        const usernameMatch = SETTINGS_SCREEN_NAME_REGEX.exec(html);
-        const idMatch = html.match(/"user_id"\s*:\s*"(\d+)"/);
+        const idMatch = SETTINGS_USER_ID_REGEX.exec(html);
-        const nameMatch = html.match(/"name":"([^"\\]*(?:\\.[^"\\]*)*)"/);
+        const nameMatch = SETTINGS_NAME_REGEX.exec(html);
 
         const username = usernameMatch?.[1];
         const userId = idMatch?.[1];
@@ -1764,7 +1834,9 @@ export class TwitterClient {
    */
   async getReplies(tweetId: string): Promise<SearchResult> {
     const response = await this.fetchTweetDetail(tweetId);
-    if (!response.success) return response;
+    if (!response.success) {
+      return response;
+    }
 
     const instructions = response.data.threaded_conversation_with_injections_v2?.instructions;
     const tweets = this.parseTweetsFromInstructions(instructions);
@@ -1778,7 +1850,9 @@ export class TwitterClient {
    */
   async getThread(tweetId: string): Promise<SearchResult> {
     const response = await this.fetchTweetDetail(tweetId);
-    if (!response.success) return response;
+    if (!response.success) {
+      return response;
+    }
 
     const instructions = response.data.threaded_conversation_with_injections_v2?.instructions;
     const tweets = this.parseTweetsFromInstructions(instructions);
@@ -1795,4 +1869,122 @@ export class TwitterClient {
 
     return { success: true, tweets: thread };
   }
+
+  private buildBookmarksFeatures(): Record<string, boolean> {
+    return {
+      ...this.buildSearchFeatures(),
+      graphql_timeline_v2_bookmark_timeline: true,
+      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,
+    };
+  }
+
+  private async getBookmarksQueryIds(): Promise<string[]> {
+    const primary = await this.getQueryId('Bookmarks');
+    return Array.from(new Set([primary, 'RV1g3b8n_SGOHwkqKYSCFw', 'tmd4ifV8RHltzn8ymGg1aw']));
+  }
+
+  /**
+   * 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 = this.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?: GraphqlTweetResult;
+                          };
+                        };
+                      };
+                    }>;
+                  }>;
+                };
+              };
+            };
+            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 = this.parseTweetsFromInstructions(instructions);
+
+          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 };
+  }
 }

src/lib/version.ts

@@ -5,6 +5,9 @@ import { fileURLToPath } from 'node:url';
 declare const __dirname: string | undefined;
 
 export const FALLBACK_VERSION = 'unknown';
+const REF_PREFIX_REGEX = /^ref:\s*/i;
+const LINE_SPLIT_REGEX = /\r?\n/;
+const GITDIR_REGEX = /gitdir:\s*(.+)\s*$/i;
 
 function readPackageVersionFromJsonFile(candidate: string): string | null {
   try {
@@ -37,7 +40,9 @@ function resolveStartDir(importMetaUrl?: string): string {
     }
   }
 
-  if (typeof __dirname === 'string' && __dirname.length > 0) return __dirname;
+  if (typeof __dirname === 'string' && __dirname.length > 0) {
+    return __dirname;
+  }
 
   return process.cwd();
 }
@@ -47,27 +52,37 @@ export function resolvePackageVersion(importMetaUrl?: string): string {
     typeof process !== 'undefined' && typeof process.env.BIRD_VERSION === 'string'
       ? process.env.BIRD_VERSION.trim()
       : '';
-  if (injected.length > 0) return injected;
+  if (injected.length > 0) {
+    return injected;
+  }
 
   let dir = resolveStartDir(importMetaUrl);
   for (let i = 0; i < 10; i += 1) {
     const version =
       readPackageVersionFromJsonFile(path.join(dir, 'package.json')) ??
       readVersionFromTextFile(path.join(dir, 'VERSION'));
-    if (version) return version;
+    if (version) {
+      return version;
+    }
 
     const parent = path.dirname(dir);
-    if (parent === dir) break;
+    if (parent === dir) {
+      break;
+    }
     dir = parent;
   }
 
   return FALLBACK_VERSION;
 }
 
-function truncateSha(sha: string, length = 8): string {
+function truncateSha(sha: string, length: number = 8): string {
   const trimmed = sha.trim();
-  if (!trimmed) return '';
+  if (!trimmed) {
-  if (trimmed.length <= length) return trimmed;
+    return '';
+  }
+  if (trimmed.length <= length) {
+    return trimmed;
+  }
   return trimmed.slice(0, length);
 }
 
@@ -80,14 +95,18 @@ function resolveGitShaFromGitDir(gitDir: string): string | null {
     return null;
   }
 
-  if (!head) return null;
+  if (!head) {
+    return null;
+  }
   if (!head.startsWith('ref:')) {
     const sha = truncateSha(head);
     return sha.length > 0 ? sha : null;
   }
 
-  const ref = head.replace(/^ref:\s*/i, '').trim();
+  const ref = head.replace(REF_PREFIX_REGEX, '').trim();
-  if (!ref) return null;
+  if (!ref) {
+    return null;
+  }
 
   const refPath = path.join(gitDir, ref);
   try {
@@ -100,9 +119,11 @@ function resolveGitShaFromGitDir(gitDir: string): string | null {
   const packedRefsPath = path.join(gitDir, 'packed-refs');
   try {
     const packed = fs.readFileSync(packedRefsPath, 'utf8');
-    const lines = packed.split(/\r?\n/);
+    const lines = packed.split(LINE_SPLIT_REGEX);
     for (const line of lines) {
-      if (!line || line.startsWith('#') || line.startsWith('^')) continue;
+      if (!line || line.startsWith('#') || line.startsWith('^')) {
+        continue;
+      }
       const [shaRaw, refName] = line.split(' ');
       if (refName?.trim() === ref) {
         const sha = truncateSha(shaRaw ?? '');
@@ -121,7 +142,9 @@ export function resolveGitSha(importMetaUrl?: string): string | null {
     typeof process !== 'undefined' && typeof process.env.BIRD_GIT_SHA === 'string'
       ? process.env.BIRD_GIT_SHA.trim()
       : '';
-  if (injected.length > 0) return truncateSha(injected);
+  if (injected.length > 0) {
+    return truncateSha(injected);
+  }
 
   let dir = resolveStartDir(importMetaUrl);
   for (let i = 0; i < 10; i += 1) {
@@ -130,15 +153,19 @@ export function resolveGitSha(importMetaUrl?: string): string | null {
       const stat = fs.statSync(dotGit);
       if (stat.isDirectory()) {
         const sha = resolveGitShaFromGitDir(dotGit);
-        if (sha) return sha;
+        if (sha) {
+          return sha;
+        }
       } else if (stat.isFile()) {
         const txt = fs.readFileSync(dotGit, 'utf8');
-        const match = txt.match(/gitdir:\s*(.+)\s*$/i);
+        const match = GITDIR_REGEX.exec(txt);
         const gitDir = match?.[1]?.trim();
         if (gitDir) {
           const resolved = path.isAbsolute(gitDir) ? gitDir : path.resolve(dir, gitDir);
           const sha = resolveGitShaFromGitDir(resolved);
-          if (sha) return sha;
+          if (sha) {
+            return sha;
+          }
         }
       }
     } catch {
@@ -146,7 +173,9 @@ export function resolveGitSha(importMetaUrl?: string): string | null {
     }
 
     const parent = path.dirname(dir);
-    if (parent === dir) break;
+    if (parent === dir) {
+      break;
+    }
     dir = parent;
   }
 

tests/cookies.test.ts

@@ -1,98 +1,30 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 
-// Mock child_process.execSync to prevent actual shell commands
+type SweetCookieResult = { cookies: Array<{ name: string; value: string; domain?: string }>; warnings: string[] };
-vi.mock('node:child_process', () => ({
+
-  execSync: vi.fn(() => ''),
+const sweet = vi.hoisted(() => ({
+  results: new Map<string, SweetCookieResult>(),
 }));
 
-// Mock fs to prevent actual file operations
+vi.mock('@steipete/sweet-cookie', () => ({
-vi.mock('node:fs', () => {
+  getCookies: vi.fn(async (options: { browsers?: string[] }) => {
-  const fs = vi.importActual<typeof import('node:fs')>('node:fs');
+    const browser = options.browsers?.[0] ?? 'unknown';
-  return {
+    return (
-    ...fs,
+      sweet.results.get(browser) ?? {
-    existsSync: vi.fn(() => false),
+        cookies: [],
-    copyFileSync: vi.fn(),
+        warnings: [],
-    mkdtempSync: vi.fn(() => '/tmp/test-dir'),
+      }
-    readdirSync: vi.fn(() => []),
+    );
-    readFileSync: vi.fn(() => Buffer.alloc(0)),
+  }),
-    rmSync: vi.fn(),
+}));
-  };
-});
-
-const itIfDarwin = process.platform === 'darwin' ? it : it.skip;
-
-function buildSafariCookieRecord(input: { domain: string; name: string; value: string; path?: string }): Buffer {
-  const domain = Buffer.from(input.domain, 'utf8');
-  const name = Buffer.from(input.name, 'utf8');
-  const path = Buffer.from(input.path ?? '/', 'utf8');
-  const value = Buffer.from(input.value, 'utf8');
-
-  const headerSize = 56;
-  const domainOffset = headerSize;
-  const nameOffset = domainOffset + domain.length + 1;
-  const pathOffset = nameOffset + name.length + 1;
-  const valueOffset = pathOffset + path.length + 1;
-  const recordSize = valueOffset + value.length + 1;
-
-  const record = Buffer.alloc(recordSize);
-  record.writeUInt32LE(recordSize, 0);
-  record.writeUInt32LE(0, 4);
-  record.writeUInt32LE(0, 8);
-  record.writeUInt32LE(0, 12);
-  record.writeUInt32LE(domainOffset, 16);
-  record.writeUInt32LE(nameOffset, 20);
-  record.writeUInt32LE(pathOffset, 24);
-  record.writeUInt32LE(valueOffset, 28);
-
-  domain.copy(record, domainOffset);
-  record[domainOffset + domain.length] = 0;
-  name.copy(record, nameOffset);
-  record[nameOffset + name.length] = 0;
-  path.copy(record, pathOffset);
-  record[pathOffset + path.length] = 0;
-  value.copy(record, valueOffset);
-  record[valueOffset + value.length] = 0;
-
-  return record;
-}
-
-function buildSafariCookiesFile(records: Buffer[]): Buffer {
-  const cookieCount = records.length;
-  const headerSize = 4 + 4 + 4 * cookieCount + 4;
-  const offsets: number[] = [];
-  let cursor = headerSize;
-  for (const record of records) {
-    offsets.push(cursor);
-    cursor += record.length;
-  }
-
-  const pageSize = cursor;
-  const page = Buffer.alloc(pageSize);
-  page.writeUInt32BE(0x00000100, 0);
-  page.writeUInt32LE(cookieCount, 4);
-  offsets.forEach((offset, index) => {
-    page.writeUInt32LE(offset, 8 + index * 4);
-  });
-  page.writeUInt32LE(0, 8 + cookieCount * 4);
-  offsets.forEach((offset, index) => {
-    records[index].copy(page, offset);
-  });
-
-  const header = Buffer.alloc(12);
-  header.write('cook', 0, 'ascii');
-  header.writeUInt32BE(1, 4);
-  header.writeUInt32BE(pageSize, 8);
-
-  return Buffer.concat([header, page]);
-}
 
 describe('cookies', () => {
   const originalEnv = process.env;
 
   beforeEach(() => {
     vi.resetModules();
+    sweet.results.clear();
     process.env = { ...originalEnv };
-    // Clear Twitter-related env vars
     process.env.AUTH_TOKEN = undefined;
     process.env.TWITTER_AUTH_TOKEN = undefined;
     process.env.CT0 = undefined;
@@ -106,58 +38,44 @@ describe('cookies', () => {
 
   describe('resolveCredentials', () => {
     it('honors cookieSource=firefox even when Safari has cookies', async () => {
+      sweet.results.set('safari', {
+        cookies: [
+          { name: 'auth_token', value: 'safari_auth', domain: 'x.com' },
+          { name: 'ct0', value: 'safari_ct0', domain: 'x.com' },
+        ],
+        warnings: [],
+      });
+      sweet.results.set('firefox', {
+        cookies: [
+          { name: 'auth_token', value: 'firefox_auth', domain: 'x.com' },
+          { name: 'ct0', value: 'firefox_ct0', domain: 'x.com' },
+        ],
+        warnings: [],
+      });
+
       const { resolveCredentials } = await import('../src/lib/cookies.js');
-      const fs = await import('node:fs');
-      const { execSync } = await import('node:child_process');
-
-      // Safari cookie file exists + contains different cookies
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
-        const lower = path.toLowerCase();
-        if (lower.endsWith('cookies.binarycookies')) return true;
-        if (lower.endsWith('cookies.sqlite')) return true;
-        if (lower.includes('firefox')) return true;
-        return false;
-      });
-      (fs.readdirSync as unknown as vi.Mock).mockReturnValue([
-        { isDirectory: () => true, name: 'abc.default-release' },
-      ]);
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
-      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
-        buildSafariCookiesFile([
-          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
-          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
-        ]),
-      );
-
-      // Firefox sqlite3 extraction returns different cookies
-      (execSync as unknown as vi.Mock).mockImplementation((cmd: string) => {
-        if (cmd.includes('sqlite3')) return 'auth_token|firefox_auth\nct0|firefox_ct0';
-        return '';
-      });
-
       const result = await resolveCredentials({ cookieSource: 'firefox' });
+
       expect(result.cookies.authToken).toBe('firefox_auth');
       expect(result.cookies.ct0).toBe('firefox_ct0');
       expect(result.cookies.source).toContain('Firefox');
     });
 
-    itIfDarwin('honors cookieSource=safari', async () => {
+    it('honors cookieSource=safari', async () => {
+      if (process.platform !== 'darwin') {
+        return;
+      }
+      sweet.results.set('safari', {
+        cookies: [
+          { name: 'auth_token', value: 'safari_auth', domain: 'x.com' },
+          { name: 'ct0', value: 'safari_ct0', domain: 'x.com' },
+        ],
+        warnings: [],
+      });
+
       const { resolveCredentials } = await import('../src/lib/cookies.js');
-      const fs = await import('node:fs');
-
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) =>
-        path.toLowerCase().endsWith('cookies.binarycookies'),
-      );
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
-      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
-      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
-        buildSafariCookiesFile([
-          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
-          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
-        ]),
-      );
-
       const result = await resolveCredentials({ cookieSource: 'safari' });
+
       expect(result.cookies.authToken).toBe('safari_auth');
       expect(result.cookies.ct0).toBe('safari_ct0');
       expect(result.cookies.cookieHeader).toContain('auth_token=safari_auth');
@@ -166,26 +84,15 @@ describe('cookies', () => {
     });
 
     it('uses firefox when enabled and returns cookies', async () => {
-      const { resolveCredentials } = await import('../src/lib/cookies.js');
+      sweet.results.set('firefox', {
-      const fs = await import('node:fs');
+        cookies: [
-
+          { name: 'auth_token', value: 'firefox_auth', domain: 'x.com' },
-      // Firefox present with cookies.sqlite
+          { name: 'ct0', value: 'firefox_ct0', domain: 'x.com' },
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
+        ],
-        const lower = path.toLowerCase();
+        warnings: [],
-        if (lower.endsWith('cookies.sqlite')) return true;
-        if (lower.includes('firefox')) return true;
-        return false;
       });
-      (fs.readdirSync as unknown as vi.Mock).mockReturnValue([
-        { isDirectory: () => true, name: 'abc.default-release' },
-      ]);
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
-      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
-
-      // sqlite3 output for firefox
-      const { execSync } = await import('node:child_process');
-      (execSync as unknown as vi.Mock).mockReturnValue('auth_token|firefox_auth\nct0|firefox_ct0');
 
+      const { resolveCredentials } = await import('../src/lib/cookies.js');
       const result = await resolveCredentials({ cookieSource: 'firefox', firefoxProfile: 'abc.default-release' });
 
       expect(result.cookies.authToken).toBe('firefox_auth');
@@ -270,15 +177,12 @@ describe('cookies', () => {
     });
 
     it('falls back to Chrome when enabled and Firefox disabled', async () => {
-      const fs = await import('node:fs');
+      sweet.results.set('chrome', {
-      const { execSync } = await import('node:child_process');
+        cookies: [
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => path.includes('Cookies'));
+          { name: 'auth_token', value: 'test_auth', domain: 'x.com' },
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
+          { name: 'ct0', value: 'test_ct0', domain: 'x.com' },
-      (execSync as unknown as vi.Mock).mockImplementation((cmd: string) => {
+        ],
-        if (cmd.includes('sqlite3')) {
+        warnings: [],
-          return 'auth_token|746573745f61757468\nct0|746573745f637430';
-        }
-        return '';
       });
 
       const { resolveCredentials } = await import('../src/lib/cookies.js');
@@ -288,22 +192,71 @@ describe('cookies', () => {
       expect(result.cookies.ct0).toBe('test_ct0');
       expect(result.cookies.source).toContain('Chrome');
     });
+
+    it('uses default browser order when cookieSource is omitted', async () => {
+      sweet.results.set('safari', { cookies: [], warnings: [] });
+      sweet.results.set('chrome', { cookies: [], warnings: [] });
+      sweet.results.set('firefox', {
+        cookies: [
+          { name: 'auth_token', value: 'firefox_auth', domain: 'x.com' },
+          { name: 'ct0', value: 'firefox_ct0', domain: 'x.com' },
+        ],
+        warnings: [],
+      });
+
+      const { resolveCredentials } = await import('../src/lib/cookies.js');
+      const result = await resolveCredentials({});
+
+      expect(result.cookies.authToken).toBe('firefox_auth');
+      expect(result.cookies.ct0).toBe('firefox_ct0');
+      expect(result.cookies.source).toContain('Firefox');
+    });
+
+    it('prefers twitter.com cookies when x.com is missing', async () => {
+      sweet.results.set('chrome', {
+        cookies: [
+          { name: 'auth_token', value: 'twitter_auth', domain: 'twitter.com' },
+          { name: 'ct0', value: 'twitter_ct0', domain: 'twitter.com' },
+        ],
+        warnings: [],
+      });
+
+      const { resolveCredentials } = await import('../src/lib/cookies.js');
+      const result = await resolveCredentials({ cookieSource: 'chrome' });
+
+      expect(result.cookies.authToken).toBe('twitter_auth');
+      expect(result.cookies.ct0).toBe('twitter_ct0');
+    });
+
+    it('falls back to the first cookie when no domain matches', async () => {
+      sweet.results.set('firefox', {
+        cookies: [
+          { name: 'auth_token', value: 'first_auth', domain: 'example.com' },
+          { name: 'ct0', value: 'first_ct0', domain: 'example.com' },
+        ],
+        warnings: [],
+      });
+
+      const { resolveCredentials } = await import('../src/lib/cookies.js');
+      const result = await resolveCredentials({ cookieSource: 'firefox' });
+
+      expect(result.cookies.authToken).toBe('first_auth');
+      expect(result.cookies.ct0).toBe('first_ct0');
+    });
   });
 
   describe('extractCookiesFromSafari', () => {
-    itIfDarwin('returns cookies from Safari binarycookies', async () => {
+    it('returns cookies from Safari', async () => {
-      const fs = await import('node:fs');
+      if (process.platform !== 'darwin') {
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) =>
+        return;
-        path.toLowerCase().endsWith('cookies.binarycookies'),
+      }
-      );
+      sweet.results.set('safari', {
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
+        cookies: [
-      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
+          { name: 'auth_token', value: 'safari_auth', domain: 'x.com' },
-      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
+          { name: 'ct0', value: 'safari_ct0', domain: 'x.com' },
-        buildSafariCookiesFile([
+        ],
-          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
+        warnings: [],
-          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
+      });
-        ]),
-      );
 
       const { extractCookiesFromSafari } = await import('../src/lib/cookies.js');
       const result = await extractCookiesFromSafari();
@@ -313,23 +266,24 @@ describe('cookies', () => {
       expect(result.cookies.source).toBe('Safari');
     });
 
-    itIfDarwin('prefers Safari over Chrome when both are available', async () => {
+    it('prefers Safari over Chrome when both are available', async () => {
-      const fs = await import('node:fs');
+      if (process.platform !== 'darwin') {
-
+        return;
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
+      }
-        const lower = path.toLowerCase();
+      sweet.results.set('safari', {
-        if (lower.endsWith('cookies.binarycookies')) return true;
+        cookies: [
-        if (lower.includes('chrome') && lower.endsWith('cookies')) return true;
+          { name: 'auth_token', value: 'safari_auth', domain: 'x.com' },
-        return false;
+          { name: 'ct0', value: 'safari_ct0', domain: 'x.com' },
+        ],
+        warnings: [],
+      });
+      sweet.results.set('chrome', {
+        cookies: [
+          { name: 'auth_token', value: 'chrome_auth', domain: 'x.com' },
+          { name: 'ct0', value: 'chrome_ct0', domain: 'x.com' },
+        ],
+        warnings: [],
       });
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
-      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
-      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
-        buildSafariCookiesFile([
-          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
-          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
-        ]),
-      );
 
       const { resolveCredentials } = await import('../src/lib/cookies.js');
       const result = await resolveCredentials({ cookieSource: ['safari', 'chrome'] });
@@ -340,18 +294,13 @@ describe('cookies', () => {
   });
 
   describe('extractCookiesFromChrome', () => {
-    it('returns cookies when sqlite yields hex values', async () => {
+    it('returns cookies when Chrome yields values', async () => {
-      const fs = await import('node:fs');
+      sweet.results.set('chrome', {
-      const { execSync } = await import('node:child_process');
+        cookies: [
-      // Pretend Chrome cookie DB exists
+          { name: 'auth_token', value: 'test_auth', domain: 'x.com' },
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => path.includes('Cookies'));
+          { name: 'ct0', value: 'test_ct0', domain: 'x.com' },
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
+        ],
-      // sqlite output with hex strings ("test_auth", "test_ct0")
+        warnings: [],
-      (execSync as unknown as vi.Mock).mockImplementation((cmd: string) => {
-        if (cmd.includes('sqlite3')) {
-          return 'auth_token|746573745f61757468\nct0|746573745f637430';
-        }
-        return '';
       });
 
       const { extractCookiesFromChrome } = await import('../src/lib/cookies.js');
@@ -363,12 +312,8 @@ describe('cookies', () => {
       expect(result.warnings).toHaveLength(0);
     });
 
-    it('warns when Chrome DB exists but contains no cookies', async () => {
+    it('warns when Chrome returns no cookies', async () => {
-      const fs = await import('node:fs');
+      sweet.results.set('chrome', { cookies: [], warnings: [] });
-      const { execSync } = await import('node:child_process');
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => path.includes('Cookies'));
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
-      (execSync as unknown as vi.Mock).mockReturnValue('');
 
       const { extractCookiesFromChrome } = await import('../src/lib/cookies.js');
       const result = await extractCookiesFromChrome('Default');
@@ -381,6 +326,11 @@ describe('cookies', () => {
 
   describe('extractCookiesFromFirefox', () => {
     it('warns when Firefox cookies database is missing', async () => {
+      sweet.results.set('firefox', {
+        cookies: [],
+        warnings: ['Firefox cookies database not found.'],
+      });
+
       const { extractCookiesFromFirefox } = await import('../src/lib/cookies.js');
       const result = await extractCookiesFromFirefox('missing-profile');
 
@@ -389,21 +339,8 @@ describe('cookies', () => {
       expect(result.warnings).toContain('Firefox cookies database not found.');
     });
 
-    it('warns when Firefox DB exists but contains no cookies', async () => {
+    it('warns when Firefox returns no cookies', async () => {
-      const fs = await import('node:fs');
+      sweet.results.set('firefox', { cookies: [], warnings: [] });
-      const { execSync } = await import('node:child_process');
-      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
-        const lower = path.toLowerCase();
-        if (lower.endsWith('cookies.sqlite')) return true;
-        if (lower.includes('firefox')) return true;
-        return false;
-      });
-      (fs.readdirSync as unknown as vi.Mock).mockReturnValue([
-        { isDirectory: () => true, name: 'abc.default-release' },
-      ]);
-      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
-      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
-      (execSync as unknown as vi.Mock).mockReturnValue('');
 
       const { extractCookiesFromFirefox } = await import('../src/lib/cookies.js');
       const result = await extractCookiesFromFirefox('abc.default-release');

tests/normalize-handle.test.ts

@@ -1,6 +1,8 @@
 import { describe, expect, it } from 'vitest';
 import { mentionsQueryFromUserOption, normalizeHandle } from '../src/lib/normalize-handle.js';
 
+const INVALID_HANDLE_REGEX = /Invalid --user handle/;
+
 describe('normalizeHandle', () => {
   it('accepts bare handle', () => {
     expect(normalizeHandle('steipete')).toBe('steipete');
@@ -36,6 +38,6 @@ describe('mentionsQueryFromUserOption', () => {
   it('returns error for invalid handle', () => {
     const result = mentionsQueryFromUserOption('@stei-pete');
     expect(result.query).toBeNull();
-    expect(result.error).toMatch(/Invalid --user handle/);
+    expect(result.error).toMatch(INVALID_HANDLE_REGEX);
   });
 });

tests/runtime-query-ids.test.ts

@@ -1,5 +1,5 @@
 import { randomUUID } from 'node:crypto';
-import { mkdir, readFile } from 'node:fs/promises';
+import { mkdir, readFile, writeFile } from 'node:fs/promises';
 import os from 'node:os';
 import path from 'node:path';
 import { afterEach, describe, expect, it, vi } from 'vitest';
@@ -8,6 +8,7 @@ import { createRuntimeQueryIdStore } from '../src/lib/runtime-query-ids.js';
 describe('runtime-query-ids', () => {
   afterEach(() => {
     vi.unstubAllGlobals();
+    delete process.env.BIRD_QUERY_IDS_CACHE;
   });
 
   it('refreshes IDs by scanning discovered bundles and persists cache', async () => {
@@ -60,4 +61,83 @@ describe('runtime-query-ids', () => {
     const parsed = JSON.parse(raw) as { ids?: Record<string, string> };
     expect(parsed.ids?.SearchTimeline).toBe('EEE');
   });
+
+  it('uses env cache path override and returns fresh snapshot without refreshing', async () => {
+    const cacheDir = path.join(os.tmpdir(), `bird-test-${randomUUID()}`);
+    await mkdir(cacheDir, { recursive: true });
+    const cachePath = path.join(cacheDir, 'query-ids-cache.json');
+    process.env.BIRD_QUERY_IDS_CACHE = cachePath;
+
+    const snapshot = {
+      fetchedAt: new Date().toISOString(),
+      ttlMs: 60_000,
+      ids: { CreateTweet: 'AAA' },
+      discovery: { pages: ['https://x.com/'], bundles: ['main.js'] },
+    };
+    await writeFile(cachePath, JSON.stringify(snapshot), 'utf8');
+
+    const fetchMock = vi.fn();
+    const store = createRuntimeQueryIdStore({ fetchImpl: fetchMock as unknown as typeof fetch });
+    const info = await store.refresh(['CreateTweet']);
+
+    expect(store.cachePath).toBe(cachePath);
+    expect(info?.snapshot.ids.CreateTweet).toBe('AAA');
+    expect(fetchMock).not.toHaveBeenCalled();
+
+    store.clearMemory();
+  });
+
+  it('returns current snapshot when refresh finds no matching operations', async () => {
+    const cacheDir = path.join(os.tmpdir(), `bird-test-${randomUUID()}`);
+    await mkdir(cacheDir, { recursive: true });
+    const cachePath = path.join(cacheDir, 'query-ids.json');
+
+    const snapshot = {
+      fetchedAt: new Date(0).toISOString(),
+      ttlMs: 1,
+      ids: { CreateTweet: 'AAA' },
+      discovery: { pages: ['https://x.com/'], bundles: ['main.test.js'] },
+    };
+    await writeFile(cachePath, JSON.stringify(snapshot), 'utf8');
+
+    const html = `<script src="https://abs.twimg.com/responsive-web/client-web/main.test.js"></script>`;
+    const js = 'console.log("no ops here")';
+
+    const fetchMock = vi.fn(async (url: string | URL) => {
+      const asString = String(url);
+      if (asString.startsWith('https://x.com/')) {
+        return new Response(html, { status: 200 });
+      }
+      if (asString.startsWith('https://abs.twimg.com/')) {
+        return new Response(js, { status: 200 });
+      }
+      return new Response('not found', { status: 404 });
+    });
+
+    const store = createRuntimeQueryIdStore({
+      cachePath,
+      ttlMs: 1,
+      fetchImpl: fetchMock as unknown as typeof fetch,
+    });
+
+    const info = await store.refresh(['CreateTweet']);
+    expect(info?.snapshot.ids.CreateTweet).toBe('AAA');
+  });
+
+  it('throws when no bundles can be discovered', async () => {
+    const cacheDir = path.join(os.tmpdir(), `bird-test-${randomUUID()}`);
+    await mkdir(cacheDir, { recursive: true });
+    const cachePath = path.join(cacheDir, 'query-ids.json');
+
+    const fetchMock = vi.fn(async () => new Response('nope', { status: 500 }));
+
+    const store = createRuntimeQueryIdStore({
+      cachePath,
+      fetchImpl: fetchMock as unknown as typeof fetch,
+    });
+
+    await expect(store.refresh(['CreateTweet'], { force: true })).rejects.toThrow(
+      'No client bundles discovered; x.com layout may have changed.',
+    );
+  });
 });

tests/twitter-client-coverage.api.test.ts

@@ -0,0 +1,207 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { TwitterClient } from '../src/lib/twitter-client.js';
+
+const validCookies = {
+  authToken: 'test_auth_token',
+  ct0: 'test_ct0_token',
+  cookieHeader: 'auth_token=test_auth_token; ct0=test_ct0_token',
+  source: 'test',
+};
+
+type ResponseLike = {
+  ok: boolean;
+  status: number;
+  json: () => Promise<unknown>;
+  text: () => Promise<string>;
+};
+
+type TwitterClientApiPrivate = TwitterClient & {
+  getBookmarksQueryIds: () => Promise<string[]>;
+};
+
+const makeResponse = (overrides: Partial<ResponseLike> = {}): ResponseLike => ({
+  ok: true,
+  status: 200,
+  json: async (): Promise<unknown> => ({}),
+  text: async (): Promise<string> => '',
+  ...overrides,
+});
+
+describe('TwitterClient API coverage', () => {
+  const originalFetch = global.fetch;
+
+  afterEach(() => {
+    global.fetch = originalFetch;
+    vi.restoreAllMocks();
+  });
+
+  describe('createTweet fallback paths', () => {
+    it('returns an error when retry response is not ok', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 404, text: async () => 'nope' }))
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 404, text: async () => 'nope' }))
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 500, text: async () => 'boom' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.tweet('hi');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 500');
+    });
+
+    it('returns API errors when retry response contains errors', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 404, text: async () => 'nope' }))
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 404, text: async () => 'nope' }))
+        .mockResolvedValueOnce(
+          makeResponse({
+            json: async () => ({ errors: [{ message: 'rate limited', code: 1 }] }),
+          }),
+        );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.tweet('hi');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('rate limited');
+    });
+
+    it('returns an error when retry response has no tweet id', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 404, text: async () => 'nope' }))
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 404, text: async () => 'nope' }))
+        .mockResolvedValueOnce(
+          makeResponse({
+            json: async () => ({ data: { create_tweet: { tweet_results: { result: {} } } } }),
+          }),
+        );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.tweet('hi');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('no ID');
+    });
+  });
+
+  describe('search error paths', () => {
+    it('returns an error for non-ok responses', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 500, text: async () => 'down' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.search('test');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 500');
+    });
+
+    it('returns errors from payloads', async () => {
+      const mockFetch = vi.fn().mockResolvedValueOnce(
+        makeResponse({
+          json: async () => ({ errors: [{ message: 'bad' }] }),
+        }),
+      );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.search('test');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('bad');
+    });
+
+    it('returns an error when fetching throws', async () => {
+      const mockFetch = vi.fn().mockRejectedValue(new Error('boom'));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.search('test');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('boom');
+    });
+
+    it('returns the second attempt error after 404s', async () => {
+      const mockFetch = vi.fn().mockResolvedValue(makeResponse({ ok: false, status: 404, text: async () => 'nope' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.search('test');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('HTTP 404');
+    });
+  });
+
+  describe('bookmarks error paths', () => {
+    it('returns an error for non-ok responses', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 500, text: async () => 'down' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.getBookmarks(1);
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 500');
+    });
+
+    it('returns API errors from payloads', async () => {
+      const mockFetch = vi.fn().mockResolvedValueOnce(
+        makeResponse({
+          json: async () => ({ errors: [{ message: 'bad' }] }),
+        }),
+      );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.getBookmarks(1);
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('bad');
+    });
+
+    it('returns an error when fetching throws', async () => {
+      const mockFetch = vi.fn().mockRejectedValue(new Error('boom'));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.getBookmarks(1);
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('boom');
+    });
+
+    it('returns unknown error when no query ids are available', async () => {
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientApiPrivate;
+      clientPrivate.getBookmarksQueryIds = async () => [];
+
+      const result = await client.getBookmarks(1);
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('Unknown error fetching bookmarks');
+    });
+
+    it('returns the second attempt error after 404s', async () => {
+      const mockFetch = vi.fn().mockResolvedValue(makeResponse({ ok: false, status: 404, text: async () => 'nope' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.getBookmarks(1);
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('HTTP 404');
+    });
+  });
+});

tests/twitter-client-coverage.core.test.ts

@@ -0,0 +1,248 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { runtimeQueryIds } from '../src/lib/runtime-query-ids.js';
+import { TwitterClient } from '../src/lib/twitter-client.js';
+
+const validCookies = {
+  authToken: 'test_auth_token',
+  ct0: 'test_ct0_token',
+  cookieHeader: 'auth_token=test_auth_token; ct0=test_ct0_token',
+  source: 'test',
+};
+
+type ResponseLike = {
+  ok: boolean;
+  status: number;
+  json: () => Promise<unknown>;
+  text: () => Promise<string>;
+};
+
+type TwitterClientPrivate = TwitterClient & {
+  refreshQueryIds: () => Promise<void>;
+  fetchWithTimeout: (url: string, init: RequestInit) => Promise<ResponseLike>;
+  ensureClientUserId: () => Promise<void>;
+  getBaseHeaders: () => Record<string, string>;
+  fetchUserArticlePlainText: (userId: string, tweetId: string) => Promise<{ title?: string; plainText?: string }>;
+  fetchTweetDetail: (tweetId: string) => Promise<{ success: true } | { success: false; error: string }>;
+  postStatusUpdate: (input: { text: string }) => Promise<{ success: boolean; error?: string }>;
+};
+
+const makeResponse = (overrides: Partial<ResponseLike> = {}): ResponseLike => ({
+  ok: true,
+  status: 200,
+  json: async (): Promise<unknown> => ({}),
+  text: async (): Promise<string> => '',
+  ...overrides,
+});
+
+describe('TwitterClient core coverage', () => {
+  const originalFetch = global.fetch;
+  const originalNodeEnv = process.env.NODE_ENV;
+
+  afterEach(() => {
+    global.fetch = originalFetch;
+    process.env.NODE_ENV = originalNodeEnv;
+    delete process.env.BIRD_DEBUG_ARTICLE;
+    vi.restoreAllMocks();
+  });
+
+  it('refreshQueryIds calls runtime refresh outside test env', async () => {
+    const client = new TwitterClient({ cookies: validCookies });
+    const refreshSpy = vi.spyOn(runtimeQueryIds, 'refresh').mockResolvedValue(null);
+    process.env.NODE_ENV = 'production';
+
+    const clientPrivate = client as unknown as TwitterClientPrivate;
+    await clientPrivate.refreshQueryIds();
+
+    expect(refreshSpy).toHaveBeenCalled();
+  });
+
+  it('fetchWithTimeout uses an abort signal when timeout is set', async () => {
+    const mockFetch = vi.fn(async (_url: string, init?: RequestInit) => {
+      expect(init?.signal).toBeInstanceOf(AbortSignal);
+      return makeResponse();
+    });
+    global.fetch = mockFetch as unknown as typeof fetch;
+
+    const client = new TwitterClient({ cookies: validCookies, timeoutMs: 5 });
+    const clientPrivate = client as unknown as TwitterClientPrivate;
+    await clientPrivate.fetchWithTimeout('https://example.com', { method: 'GET' });
+
+    expect(mockFetch).toHaveBeenCalledTimes(1);
+  });
+
+  it('returns a not found error when tweet data is missing', async () => {
+    const mockFetch = vi.fn().mockResolvedValueOnce(
+      makeResponse({
+        json: async () => ({
+          data: {
+            threaded_conversation_with_injections_v2: {
+              instructions: [
+                {
+                  entries: [
+                    {
+                      content: {
+                        itemContent: {
+                          tweet_results: {
+                            result: {
+                              rest_id: 'other',
+                              legacy: { full_text: 'nope', created_at: '2024-01-01T00:00:00Z' },
+                              core: { user_results: { result: { legacy: { screen_name: 'user', name: 'User' } } } },
+                            },
+                          },
+                        },
+                      },
+                    },
+                  ],
+                },
+              ],
+            },
+          },
+        }),
+      }),
+    );
+    global.fetch = mockFetch as unknown as typeof fetch;
+
+    const client = new TwitterClient({ cookies: validCookies });
+    const result = await client.getTweet('123');
+
+    expect(result.success).toBe(false);
+    expect(result.error).toBe('Tweet not found in response');
+  });
+
+  it('adds client user id header after ensureClientUserId', async () => {
+    const client = new TwitterClient({ cookies: validCookies });
+    process.env.NODE_ENV = 'production';
+
+    vi.spyOn(client, 'getCurrentUser').mockResolvedValue({
+      success: true,
+      user: { id: '42', username: 'tester', name: 'Tester' },
+    });
+
+    const clientPrivate = client as unknown as TwitterClientPrivate;
+    await clientPrivate.ensureClientUserId();
+    const headers = clientPrivate.getBaseHeaders();
+
+    expect(headers['x-twitter-client-user-id']).toBe('42');
+  });
+
+  describe('fetchUserArticlePlainText failures', () => {
+    it('returns empty object when response is not ok', async () => {
+      const mockFetch = vi.fn().mockResolvedValueOnce(makeResponse({ ok: false, status: 500 }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientPrivate;
+      const result = await clientPrivate.fetchUserArticlePlainText('user', 'tweet');
+
+      expect(result).toEqual({});
+    });
+
+    it('returns empty object when fetching throws', async () => {
+      const mockFetch = vi.fn().mockRejectedValueOnce(new Error('boom'));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientPrivate;
+      const result = await clientPrivate.fetchUserArticlePlainText('user', 'tweet');
+
+      expect(result).toEqual({});
+    });
+
+    it('returns empty object when no matching tweet is found', async () => {
+      const mockFetch = vi.fn().mockResolvedValueOnce(
+        makeResponse({
+          json: async () => ({
+            data: {
+              user: { result: { timeline: { timeline: { instructions: [] } } } },
+            },
+          }),
+        }),
+      );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientPrivate;
+      const result = await clientPrivate.fetchUserArticlePlainText('user', 'tweet');
+
+      expect(result).toEqual({});
+    });
+  });
+
+  describe('fetchTweetDetail error handling', () => {
+    it('returns API errors from response payloads', async () => {
+      const mockFetch = vi.fn().mockResolvedValueOnce(
+        makeResponse({
+          json: async () => ({ errors: [{ message: 'bad news' }] }),
+        }),
+      );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientPrivate;
+      const result = await clientPrivate.fetchTweetDetail('1');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('bad news');
+    });
+
+    it('parses POST responses when GET returns 404', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 404, text: async () => 'nope' }))
+        .mockResolvedValueOnce(
+          makeResponse({
+            json: async () => ({
+              data: {
+                tweetResult: {
+                  result: {
+                    rest_id: '1',
+                    legacy: {
+                      full_text: 'hi',
+                      created_at: '2024-01-01T00:00:00Z',
+                      reply_count: 0,
+                      retweet_count: 0,
+                      favorite_count: 0,
+                    },
+                    core: { user_results: { result: { legacy: { screen_name: 'user', name: 'User' } } } },
+                  },
+                },
+              },
+            }),
+          }),
+        );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientPrivate;
+      const result = await clientPrivate.fetchTweetDetail('1');
+
+      expect(result.success).toBe(true);
+    });
+
+    it('returns an error when fetch throws', async () => {
+      const mockFetch = vi.fn().mockRejectedValueOnce(new Error('boom'));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientPrivate;
+      const result = await clientPrivate.fetchTweetDetail('1');
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('boom');
+    });
+  });
+
+  describe('postStatusUpdate error handling', () => {
+    it('returns an error when postStatusUpdate throws', async () => {
+      const mockFetch = vi.fn().mockRejectedValueOnce(new Error('boom'));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientPrivate;
+      const result = await clientPrivate.postStatusUpdate({ text: 'hello' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('boom');
+    });
+  });
+});

tests/twitter-client-coverage.upload.test.ts

@@ -0,0 +1,224 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { TwitterClient } from '../src/lib/twitter-client.js';
+
+const validCookies = {
+  authToken: 'test_auth_token',
+  ct0: 'test_ct0_token',
+  cookieHeader: 'auth_token=test_auth_token; ct0=test_ct0_token',
+  source: 'test',
+};
+
+type ResponseLike = {
+  ok: boolean;
+  status: number;
+  json: () => Promise<unknown>;
+  text: () => Promise<string>;
+};
+
+type TwitterClientUploadPrivate = TwitterClient & {
+  sleep: (ms: number) => Promise<void>;
+  extractArticleText: (result: unknown) => string | undefined;
+};
+
+const makeResponse = (overrides: Partial<ResponseLike> = {}): ResponseLike => ({
+  ok: true,
+  status: 200,
+  json: async (): Promise<unknown> => ({}),
+  text: async (): Promise<string> => '',
+  ...overrides,
+});
+
+describe('TwitterClient upload coverage', () => {
+  const originalFetch = global.fetch;
+
+  afterEach(() => {
+    global.fetch = originalFetch;
+    delete process.env.BIRD_DEBUG_ARTICLE;
+    vi.restoreAllMocks();
+  });
+
+  describe('uploadMedia error paths', () => {
+    it('rejects unsupported media types', async () => {
+      global.fetch = vi.fn() as unknown as typeof fetch;
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.uploadMedia({ data: new Uint8Array([1, 2, 3]), mimeType: 'application/pdf' });
+
+      expect(result.success).toBe(false);
+      expect(global.fetch).not.toHaveBeenCalled();
+    });
+
+    it('returns an error when INIT fails', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 500, text: async () => 'nope' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'image/png' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 500');
+    });
+
+    it('returns an error when APPEND fails', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({ media_id_string: '1' }) }))
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 500, text: async () => 'nope' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'image/png' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 500');
+    });
+
+    it('returns an error when FINALIZE fails', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({ media_id_string: '1' }) }))
+        .mockResolvedValueOnce(makeResponse())
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 500, text: async () => 'nope' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'image/png' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 500');
+    });
+
+    it('returns an error when media processing fails', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({ media_id_string: '1' }) }))
+        .mockResolvedValueOnce(makeResponse())
+        .mockResolvedValueOnce(
+          makeResponse({
+            json: async () => ({ processing_info: { state: 'failed', error: { message: 'processing failed' } } }),
+          }),
+        );
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'video/mp4' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toBe('processing failed');
+    });
+
+    it('returns an error when STATUS fails', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({ media_id_string: '1' }) }))
+        .mockResolvedValueOnce(makeResponse())
+        .mockResolvedValueOnce(
+          makeResponse({
+            json: async () => ({ processing_info: { state: 'pending', check_after_secs: 0 } }),
+          }),
+        )
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 503, text: async () => 'down' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientUploadPrivate;
+      clientPrivate.sleep = vi.fn().mockResolvedValue(undefined);
+
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'video/mp4' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 503');
+    });
+
+    it('retries STATUS and continues when processing is pending', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({ media_id_string: '1' }) }))
+        .mockResolvedValueOnce(makeResponse())
+        .mockResolvedValueOnce(
+          makeResponse({
+            json: async () => ({ processing_info: { state: 'pending', check_after_secs: 0 } }),
+          }),
+        )
+        .mockResolvedValueOnce(
+          makeResponse({
+            json: async () => ({ processing_info: { state: 'pending', check_after_secs: 0 } }),
+          }),
+        )
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({ processing_info: { state: 'succeeded' } }) }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientUploadPrivate;
+      clientPrivate.sleep = vi.fn().mockResolvedValue(undefined);
+
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'video/mp4' });
+
+      expect(result.success).toBe(true);
+    });
+
+    it('returns an error when metadata upload fails', async () => {
+      const mockFetch = vi
+        .fn()
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({ media_id_string: '1' }) }))
+        .mockResolvedValueOnce(makeResponse())
+        .mockResolvedValueOnce(makeResponse({ json: async () => ({}) }))
+        .mockResolvedValueOnce(makeResponse({ ok: false, status: 400, text: async () => 'bad' }));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'image/png', alt: 'alt' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('HTTP 400');
+    });
+
+    it('returns an error when upload throws', async () => {
+      const mockFetch = vi.fn().mockRejectedValueOnce(new Error('boom'));
+      global.fetch = mockFetch as unknown as typeof fetch;
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.uploadMedia({ data: new Uint8Array([1]), mimeType: 'image/png' });
+
+      expect(result.success).toBe(false);
+      expect(result.error).toContain('boom');
+    });
+  });
+
+  describe('article extraction edge cases', () => {
+    it('logs article payloads when debug flag is set', () => {
+      const client = new TwitterClient({ cookies: validCookies });
+      process.env.BIRD_DEBUG_ARTICLE = '1';
+      const errorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
+
+      const clientPrivate = client as unknown as TwitterClientUploadPrivate;
+      const result = clientPrivate.extractArticleText({
+        rest_id: '1',
+        article: {
+          title: 'Title',
+          plain_text: 'Body',
+          article_results: { result: { title: 'Title', plain_text: 'Body' } },
+        },
+      });
+
+      expect(result).toBe('Title\n\nBody');
+      expect(errorSpy).toHaveBeenCalled();
+    });
+
+    it('drops duplicate body when it matches the title', () => {
+      const client = new TwitterClient({ cookies: validCookies });
+      const clientPrivate = client as unknown as TwitterClientUploadPrivate;
+      const result = clientPrivate.extractArticleText({
+        rest_id: '1',
+        article: {
+          title: 'Same',
+          plain_text: 'Same',
+          article_results: { result: { title: 'Same', plain_text: 'Same' } },
+        },
+      });
+
+      expect(result).toBe('Same');
+    });
+  });
+});

tests/twitter-client.test.ts

@@ -1072,6 +1072,78 @@ describe('TwitterClient', () => {
     });
   });
 
+  describe('bookmarks', () => {
+    let mockFetch: ReturnType<typeof vi.fn>;
+
+    beforeEach(() => {
+      mockFetch = vi.fn();
+      global.fetch = mockFetch as unknown as typeof fetch;
+    });
+
+    it('fetches bookmarks and parses tweet results', async () => {
+      mockFetch.mockResolvedValueOnce({
+        ok: true,
+        status: 200,
+        json: async () => ({
+          data: {
+            bookmark_timeline_v2: {
+              timeline: {
+                instructions: [
+                  {
+                    entries: [
+                      {
+                        content: {
+                          itemContent: {
+                            tweet_results: {
+                              result: {
+                                rest_id: '1',
+                                legacy: {
+                                  full_text: 'saved',
+                                  created_at: '2024-01-01T00:00:00Z',
+                                  reply_count: 0,
+                                  retweet_count: 0,
+                                  favorite_count: 0,
+                                  conversation_id_str: '1',
+                                },
+                                core: {
+                                  user_results: {
+                                    result: {
+                                      rest_id: 'u1',
+                                      legacy: { screen_name: 'root', name: 'Root' },
+                                    },
+                                  },
+                                },
+                              },
+                            },
+                          },
+                        },
+                      },
+                    ],
+                  },
+                ],
+              },
+            },
+          },
+        }),
+      });
+
+      const client = new TwitterClient({ cookies: validCookies });
+      const result = await client.getBookmarks(2);
+
+      expect(result.success).toBe(true);
+      expect(result.tweets?.[0].id).toBe('1');
+      expect(mockFetch).toHaveBeenCalledTimes(1);
+
+      const [url, options] = mockFetch.mock.calls[0];
+      expect(options.method).toBe('GET');
+      expect(String(url)).toContain('/Bookmarks?');
+      const parsedVars = JSON.parse(new URL(url as string).searchParams.get('variables') as string);
+      expect(parsedVars.count).toBe(2);
+      const parsedFeatures = JSON.parse(new URL(url as string).searchParams.get('features') as string);
+      expect(parsedFeatures.graphql_timeline_v2_bookmark_timeline).toBe(true);
+    });
+  });
+
   describe('conversation helpers', () => {
     let mockFetch: ReturnType<typeof vi.fn>;
 

tests/version.test.ts

@@ -3,7 +3,13 @@ import os from 'node:os';
 import path from 'node:path';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 import { afterEach, describe, expect, it } from 'vitest';
-import { FALLBACK_VERSION, formatVersionLine, resolveGitSha, resolvePackageVersion } from '../src/lib/version.js';
+import {
+  FALLBACK_VERSION,
+  formatVersionLine,
+  getCliVersion,
+  resolveGitSha,
+  resolvePackageVersion,
+} from '../src/lib/version.js';
 
 function withTempDir<T>(fn: (dir: string) => T): T {
   const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'bird-version-test-'));
@@ -53,6 +59,17 @@ describe('getCliVersion', () => {
     });
   });
 
+  it('falls back to VERSION file when package.json has no version', () => {
+    withTempDir((dir) => {
+      fs.writeFileSync(path.join(dir, 'package.json'), JSON.stringify({}));
+      fs.writeFileSync(path.join(dir, 'VERSION'), '5.5.5\n');
+      const entry = path.join(dir, 'entry.ts');
+      fs.writeFileSync(entry, '// noop');
+
+      expect(resolvePackageVersion(pathToFileURL(entry).href)).toBe('5.5.5');
+    });
+  });
+
   it('falls back to unknown when no version files exist', () => {
     withTempDir((dir) => {
       const entry = path.join(dir, 'a', 'b', 'c', 'entry.ts');
@@ -63,6 +80,31 @@ describe('getCliVersion', () => {
     });
   });
 
+  it('returns null when git HEAD is missing', () => {
+    withTempDir((dir) => {
+      const gitDir = path.join(dir, '.git');
+      fs.mkdirSync(gitDir, { recursive: true });
+
+      const entry = path.join(dir, 'entry.ts');
+      fs.writeFileSync(entry, '// noop');
+
+      expect(resolveGitSha(pathToFileURL(entry).href)).toBeNull();
+    });
+  });
+
+  it('returns null when git ref cannot be resolved', () => {
+    withTempDir((dir) => {
+      const gitDir = path.join(dir, '.git');
+      fs.mkdirSync(gitDir, { recursive: true });
+      fs.writeFileSync(path.join(gitDir, 'HEAD'), 'ref: refs/heads/main\n');
+
+      const entry = path.join(dir, 'entry.ts');
+      fs.writeFileSync(entry, '// noop');
+
+      expect(resolveGitSha(pathToFileURL(entry).href)).toBeNull();
+    });
+  });
+
   it('resolves git sha from .git directory HEAD', () => {
     withTempDir((dir) => {
       const gitDir = path.join(dir, '.git');
@@ -113,6 +155,16 @@ describe('getCliVersion', () => {
     });
   });
 
+  it('returns null when no git directory exists', () => {
+    withTempDir((dir) => {
+      const entry = path.join(dir, 'nested', 'entry.ts');
+      fs.mkdirSync(path.dirname(entry), { recursive: true });
+      fs.writeFileSync(entry, '// noop');
+
+      expect(resolveGitSha(pathToFileURL(entry).href)).toBeNull();
+    });
+  });
+
   it('formats version line with version + sha when both available', () => {
     withTempDir((dir) => {
       fs.writeFileSync(path.join(dir, 'package.json'), JSON.stringify({ version: '3.3.3' }));
@@ -126,4 +178,10 @@ describe('getCliVersion', () => {
       expect(formatVersionLine(pathToFileURL(entry).href)).toBe('3.3.3 (dddddddd)');
     });
   });
+
+  it('returns a CLI version string', () => {
+    const value = getCliVersion();
+    expect(typeof value).toBe('string');
+    expect(value.length).toBeGreaterThan(0);
+  });
 });

tsconfig.oxlint.json

@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "noEmit": true,
+    "rootDir": "."
+  },
+  "include": ["src/**/*.ts", "tests/**/*.ts", "scripts/**/*.ts"],
+  "exclude": ["node_modules", "dist", "coverage"]
+}

vitest.config.ts

@@ -11,10 +11,10 @@ export default defineConfig({
       include: ['src/**/*.ts'],
       exclude: ['src/index.ts'],
       thresholds: {
-        statements: 70,
+        statements: 90,
-        branches: 70,
+        branches: 80,
-        functions: 70,
+        functions: 90,
-        lines: 70,
+        lines: 90,
       },
     },
   },