Bulk delete your tweets, no extension needed

(() => {
  // ============ CONFIG ============
  const HANDLE          = "your_handle"; // your X username, without the @
  const KEEP_RECENT     = 15;           // NEVER deletes the 15 most recent tweets (at the top)
  const KEEP_STATUS_IDS = [             // EXTRA protection (optional): IDs to never delete
    "1234567890123456789",
  ];
  let   DRY_RUN         = true;         // true = simulation (list only). false = REAL DELETION.
  const MIN_DELAY_MS    = 6000;
  const MAX_DELAY_MS    = 14000;
  const MAX_DELETIONS   = 40;           // cap per run (run it again to continue)
  // ================================

  const me = HANDLE.toLowerCase();
  const KEEP = new Set(KEEP_STATUS_IDS.map(String));
  const protectedRecent = new Set();
  const RX_DELETE = /(Delete|delete|supprimer)/i;
  const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
  const rand  = (a, b) => Math.floor(a + Math.random() * (b - a));
  const skipped = new Set();

  if (!location.pathname.toLowerCase().startsWith("/" + me)) {
    console.warn(`%c[STOP] Go to https://x.com/${HANDLE} (Posts tab), then run it again.`,
      "color:#e0245e;font-weight:bold");
    return;
  }

  const articles = () => [...document.querySelectorAll('article[data-testid="tweet"]')];

  const idOf = (art) => {
    const href = [...art.querySelectorAll('a[href*="/status/"]')]
      .map((x) => x.getAttribute("href"))
      .find((h) => new RegExp(`^/${HANDLE}/status/\\d+`, "i").test(h));
    if (!href) return null;
    const m = href.match(/status\/(\d+)/);
    return m ? m[1] : null;
  };

  // Loads and protects the KEEP_RECENT most recent tweets (the ones at the top).
  async function protectRecent() {
    const order = [], seen = new Set();
    let noNew = 0;
    window.scrollTo(0, 0);
    await sleep(1200);
    while (order.length < KEEP_RECENT && noNew < 6) {
      let added = 0;
      for (const art of articles()) {
        const id = idOf(art);
        if (id && !seen.has(id)) { seen.add(id); order.push(id); added++; }
      }
      noNew = added ? 0 : noNew + 1;
      if (order.length >= KEEP_RECENT) break;
      const cs = articles();
      (cs[cs.length - 1] || document.body).scrollIntoView({ block: "end" });
      await sleep(1400);
    }
    for (const id of order.slice(0, KEEP_RECENT)) protectedRecent.add(id);
    return order.slice(0, KEEP_RECENT);
  }

  const eligible = (art) => {
    const id = idOf(art);
    if (!id) return null;
    if (protectedRecent.has(id)) return null;   // one of the most recent
    if (KEEP.has(id)) return null;              // extra protected ID
    if (skipped.has(id)) return null;
    return id;
  };

  async function deleteOne(art, id) {
    const caret = art.querySelector('[data-testid="caret"]');
    if (!caret) { skipped.add(id); return false; }
    caret.click();
    await sleep(700);
    const del = [...document.querySelectorAll('[role="menuitem"]')]
      .find((i) => RX_DELETE.test((i.innerText || "").trim()));
    if (!del) { document.body.click(); skipped.add(id); return false; }
    del.click();
    await sleep(700);
    const confirmBtn = document.querySelector('[data-testid="confirmationSheetConfirm"]');
    if (!confirmBtn) { skipped.add(id); return false; }
    confirmBtn.click();
    await sleep(1500);
    return true;
  }

  async function dryScan() {
    const seen = new Set();
    let noNew = 0;
    console.log("%c[SIMULATION] Nothing will be deleted. Counting...", "color:#1d9bf0;font-weight:bold");
    while (noNew < 4) {
      let added = 0;
      for (const art of articles()) {
        const id = eligible(art);
        if (id && !seen.has(id)) { seen.add(id); added++; }
      }
      noNew = added ? 0 : noNew + 1;
      const cs = articles();
      (cs[cs.length - 1] || document.body).scrollIntoView({ block: "end" });
      await sleep(1200);
    }
    console.log(`%c[SIMULATION] ${seen.size} tweet(s) WOULD be deleted (the most recent ones are protected).`,
      "color:#1d9bf0;font-weight:bold");
    console.log([...seen].slice(0, 60));
  }

  async function run() {
    let count = 0, guard = 0, noHit = 0, started = false;
    while (count < MAX_DELETIONS && guard++ < 1500) {
      const pair = articles().map((a) => [a, eligible(a)]).find(([, id]) => id);
      if (!pair) {
        if ((started && noHit >= 6) || noHit >= 40) break;
        const cs = articles();
        (cs[cs.length - 1] || document.body).scrollIntoView({ block: "end" });
        await sleep(1500);
        noHit++;
        continue;
      }
      started = true; noHit = 0;
      const [node, id] = pair;
      node.scrollIntoView({ block: "center" });
      await sleep(600);
      const ok = await deleteOne(node, id);
      if (ok) count++;
      console.log(`${ok ? "deleted" : "skipped"} ${id}  (total: ${count}/${MAX_DELETIONS})`);
      await sleep(rand(MIN_DELAY_MS, MAX_DELAY_MS));
    }
    console.log(`%c[DONE] ${count} deleted this round. Run the script again if any remain.`,
      "color:#00ba7c;font-weight:bold");
  }

  (async () => {
    console.log(`Loading and protecting the ${KEEP_RECENT} most recent tweets...`);
    const recent = await protectRecent();
    if (recent.length < KEEP_RECENT) {
      console.warn(`%c[STOP] Only ${recent.length} tweets loaded (X throttled). Reload the page (F5) and try again.`,
        "color:#e0245e;font-weight:bold");
      return;
    }
    console.log("%cProtected (the most recent):", "color:#00ba7c;font-weight:bold", recent);
    if (DRY_RUN) { await dryScan(); return; }
    await run();
  })();
})();