Finance gives AI agents an unusually unforgiving outcome signal: PnL.

And the harder part of an AI trading agent starts after the model has an opinion.

@questflow calls its 4-layer stack the Financial Harness:

models for reasoning, Skills for investment methods, plugins for live financial data and tools, and execution for read/write connections to exchanges, brokers, wallets, and accounts.

Questflow also let me choose among OpenAI GPT, Claude, Gemini, Grok, Kimi, DeepSeek, Qwen, MiniMax, Mimo, GLM, and Hunyuan for different research, analysis, and trading tasks.