Could you elaborate on your issues with LangChain?

We're kinda headed towards using it as it seems to be a flexible enough abstraction that is relatively stable to work with, so I'd like to know if I'm overlooking something..?

You spend more time fighting the tool/framework than working on the product you’re trying to build.

A lot of folks use it to get started quickly and then realize the unnecessary abstractions are obfuscating the actual hard parts.

A big soup of untyped json blobs and python, all working highly asynchronously in complicated ways.

Is this variable available in my agent’s state?

Depends! Is it an agent that started an hour ago before you made that other change? Is it in the manager state or not? Did the previous agent run correctly or not? Did something else go wrong?

Cryptic errors that will make you tear your hair out and docs that are constantly changing

How is the MCP API bad? It uses simple and widely available standards-based transports while still allowing custom transport implementations, along with a simple API that can be used easily without any libraries, in any programming language under the sun?