Building a multi-task application with Langchain

Langchain is the most popular task-chaining framework (Reference 8). Task chaining is an extension of the prompt engineering concept that we illustrated in the previous section. Chains serve as predetermined sequences of operations, designed to organize intricate processes in a format that is both more manageable and easier to understand. These chains follow a distinct order of actions. They are well suited for workflows characterized by a consistent number of steps. With task chaining, you can create sequences of prompts, where the output of the previous task executed by the framework is fed as input for the next task.

Besides Langchain, there are now several other options available for task chaining, like LlamaIndex or Semantic Kernel (from Microsoft). Langchain provides multiple functionalities, including specialized tools to ingest data or output results, intelligent agents, as well as the possibility to extend it by defining...