I see the API is rarely mentioning exact message structure (system prompt, assistant/user history, etc) or the choice of model (other than defaultLanguageModel). And it's not immediately clear to me how `toolbox.pickAndRun` can access any context from an ongoing agentic flow other than within the one prompt. But this is just from skimming the docs, maybe all of this is supported?

The reason I ask is because I've had a lot of success using different models for different tasks, constructing the system prompt specifically for each task, and also choosing between the "default" long assistant/tool_call/user/(repeat) message history vs. constantly pruning it (bad for caching but sometimes good for performance). And it would be nice to know a library like this could allow experimentation of these strategies.