Thistle — Toolkit for Claude

Thistle adds four focused improvements to the Claude web app. True-Black Theme A pure-black #000 canvas with neutral elevation steps makes each panel feel like a distinct surface instead of another shade of grey. Coral remains the single accent colour. You can disable the theme from the toolbar popup without disabling the extension. Inline Usage Gauge See your current session usage directly in the composer toolbar, between the + button and the model picker. It includes: Your usage percentage A progress bar that turns coral above 90% A countdown to the next reset Click the gauge to view both your 5-hour session window and weekly limit, including the reset time for each. Usage figures come from the same endpoint Claude uses for its own limit warnings, so the numbers match what Claude reports. Context Transfer Send the open conversation to ChatGPT, Gemini, or Grok with one click. Thistle formats the conversation as Markdown and opens it in the selected site’s composer in a new tab. It never presses Send, so you can review and edit the text first. Useful for getting a second opinion—or continuing a conversation after reaching a Claude usage limit. Markdown Export Copy the open conversation to your clipboard or download it as a .md file. Privacy Thistle is designed to keep your data in your browser: No account No server No analytics or telemetry No remote code Settings stored locally Usage figures are read from Claude’s own API in your browser, using the session you are already signed in with. Conversation text is accessed only when you explicitly choose Transfer or Export. When transferring, it is sent only to the chatbot site you select. Thistle runs only on claude.ai and the three chatbot sites it supports for context transfer. Source code: https://github.com/leo-noble/Thistle Thistle is not affiliated with, endorsed by, or connected to Anthropic. “Claude” is a trademark of Anthropic.