OnlyTerp/UltraCode-Shim — reverse-engineered prompt

Build me a small Python tool that lets Claude Code use its UltraCode style workflow with whatever AI model account I already have.

I want it to run locally as a simple proxy, leave my normal Claude Code setup untouched, and let me choose models from Claude Code’s model menu. It should support a config file where I can add or remove backends like OpenRouter, local models, Codex login, DeepSeek, MiniMax, or similar providers.

Please include an easy first run experience. On Windows I want desktop shortcuts if possible, and on Mac or Linux I want a simple launch script. Add a doctor check that tells me if Python, Claude Code, config, and credentials look okay.

The tool should let me pick one model for the main chat and optionally a different cheaper or faster model for background worker tasks. It should be reliable for long autonomous runs, with retries for empty responses, stalled streams, and rejected tool calls.

Use only Python standard library if you can, and include clear setup docs and a sample config.