Claude Usage Overlay

Displays Claude.ai session and weekly usage stats as a floating overlay while you chat.
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// ==UserScript==
// @name         Claude Usage Overlay
// @namespace    https://greasyfork.org/users/tac-tac-go
// @version      1.0.0
// @description  Displays Claude.ai session and weekly usage stats as a floating overlay while you chat.
// @author       tac-tac-go
// @match        https://claude.ai/*
// @grant        none
// @license      MIT
// @homepageURL  https://greasyfork.org/users/tac-tac-go
// @supportURL   https://greasyfork.org/users/tac-tac-go
// ==/UserScript==

(function () {
  'use strict';

  function loadUsageViaIframe() {
    return new Promise((resolve) => {
      document.getElementById('usage-iframe')?.remove();

      const iframe = document.createElement('iframe');
      iframe.id = 'usage-iframe';
      iframe.src = '/settings/usage';
      iframe.style.cssText = 'position:fixed;top:-9999px;left:-9999px;width:1px;height:1px;';
      document.body.appendChild(iframe);

      iframe.onload = () => {
        let attempts = 0;
        const timer = setInterval(() => {
          attempts++;
          const iDoc = iframe.contentDocument;
          const bars = iDoc?.querySelectorAll('[role="progressbar"]');

          if (bars?.length >= 1) {
            clearInterval(timer);
            iframe.remove();

            const sessionPct = bars[0]?.getAttribute('aria-valuenow') ?? '?';
            const weeklyPct  = bars[1]?.getAttribute('aria-valuenow') ?? '?';
            const allP = Array.from(iDoc.querySelectorAll('p'));
            const resetTexts = allP.filter(p => p.textContent.includes('にリセット'));

            resolve({
              sessionPct,
              weeklyPct,
              sessionReset: resetTexts[0]?.textContent.trim() ?? '',
              weeklyReset:  resetTexts[1]?.textContent.trim() ?? '',
            });
          }

          if (attempts > 20) {
            clearInterval(timer);
            iframe.remove();
            resolve(null);
          }
        }, 200);
      };
    });
  }

  async function updateUsage() {
    const el = document.getElementById('claude-usage-overlay');
    el.textContent = 'Updating...';

    const data = await loadUsageViaIframe();

    if (!data) {
      el.textContent = 'Failed to load';
      return;
    }

    el.innerHTML = `
      <div style="font-weight:bold;margin-bottom:6px">📊 Claude Usage</div>
      <div>🕐 Session: <b>${data.sessionPct}%</b></div>
      <div style="font-size:10px;color:#aaa;margin-bottom:4px">${data.sessionReset}</div>
      <div>📅 Weekly: <b>${data.weeklyPct}%</b></div>
      <div style="font-size:10px;color:#aaa">${data.weeklyReset}</div>
      <div style="font-size:10px;color:#555;margin-top:6px">Click to refresh</div>
    `;
  }

  const overlay = document.createElement('div');
  overlay.id = 'claude-usage-overlay';
  overlay.style.cssText = `
    position:fixed; bottom:80px; right:16px; z-index:9999;
    background:#1e1e1e; color:#e0e0e0; padding:10px 14px;
    border-radius:8px; font-size:12px; border:1px solid #444;
    min-width:160px; line-height:1.6; cursor:pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  `;
  overlay.textContent = 'Loading...';
  overlay.title = 'Click to refresh';
  overlay.onclick = updateUsage;
  document.body.appendChild(overlay);

  updateUsage();
  setInterval(updateUsage, 5 * 60 * 1000);
})();