Rule Based Auction Auto-Bidder

I need a small utility that logs in to a specific auction site and keeps me in the lead without manual refreshes. The tool should place the first bid if none exists for me, then automatically keep raising my offer — but only according to the site’s published bid-increment rules. Once my ceiling is reached by following those increments, it must stop on its own.

A clean command-line script or a lightweight desktop app is fine; whichever you prefer as long as it is stable and easy to configure. I will enter my credentials, item URL, and maximum desired price, and the program should handle the rest by:

• Monitoring the auction in real time
• Submitting bids strictly at the next valid increment
• Respecting the overall limit derived from the increment logic, never exceeding it

Please include brief setup instructions and comments in the code so I can adjust credentials and limits myself later. If you have worked with auction site APIs, web sockets, or headless browser automation (Python + Selenium, Playwright, or similar), mention that in your proposal. I will test the tool on one live listing to confirm it places and updates bids exactly as outlined before releasing final approval.