Claude has the notion of hooks: https://code.claude.com/docs/en/hooks
This is similar to the Langchain middleware hooks: https://docs.langchain.com/oss/python/langchain/middleware/overview
Some of ALTK components be called from hooks.
Even better, hooks can be packaged as Claude plugins that can be easily installed from a marketplace. For example:
claude plugin marketplace add AgentToolkit/agent-lifecycle-toolkit
claude plugin install jsonprocess@agent-lifecycle-toolkit-marketplace