LangChain Documentation on LCEL:
https://python.langchain.com/v0.2/docs/core_modules/expression_language/

LangGraph Documentation:
https://www.langchain.com/langgraph

Prompt Engineering Guide - Chaining Prompts:
https://www.promptingguide.ai/techniques/chaining

ADK Memory
https://google.github.io/adk-docs/sessions/memory/

LangGraph Memory
https://langchain-ai.github.io/langgraph/concepts/memory/  

Vertex AI Agent Engine Memory Bank
https://cloud.google.com/blog/products/ai-machine-learning/vertex-ai-memory-bank-in-public-preview      

OpenAI API Documentation (General Prompting Concepts):
https://platform.openai.com/docs/guides/gpt/prompting

OpenAI Function Calling Documentation:
https://platform.openai.com/docs/guides/function-calling

Crew AI Documentation (Tasks and Processes):
https://docs.crewai.com/

CrewAI Documentation (Tools):
https://docs.crewai.com/concepts/tools  

Google AI for Developers (Prompting Guides):
https://cloud.google.com/discover/what-is-prompt-engineering?hl=en

Google Agent Developer Kit Documentation:
https://google.github.io/adk-docs/

Google Agent Developer Kit (ADK) Documentation (Multi-Agent Systems):
https://google.github.io/adk-docs/agents/multi-agents/

Vertex Prompt Optimizer
https://cloud.google.com/vertex-ai/generative-ai/docs/learn/prompts/prompt-optimizer