Cmux Browser Chatgpting

cmux Browser ChatGPT

Send a question to the ChatGPT browser surface open in cmux and capture the response as a screenshot.

Workflow

Discovery: Find the ChatGPT surface across all workspaces by scanning the cmux tree for chatgpt.com.

Interaction: Fill the prompt input, submit, wait for the response, screenshot.

Run the bundled script, passing the question as a single quoted argument:

bash <skill_base_dir>/scripts/ask-chatgpt.sh "<question>"

The script prints the surface ref it found and the path to the response screenshot.

After the script completes, read the screenshot and relay ChatGPT's answer to the user.

Key Implementation Notes

• ChatGPT uses a contenteditable div with id #prompt-textarea — use cmux browser fill, not type
• cmux browser eval and cmux browser press Enter raise a JS exception on chatgpt.com — use the send-button click fallback chain instead
• cmux browser snapshot returns almost nothing on chatgpt.com (heavy JS app) — screenshots are the only reliable way to read the response
• Surface refs change between sessions — always discover fresh via cmux tree --all, never hardcode