Is it possible to read any extractor configuration when in the target namespace? For example in the tap namesapace, I can read using: client.py ..... self.config["domain"] ..... meltano.yml ..... plugins: extractors: - name: tap-custom namespace: tap_custom pip_url: -e ./ capabilities: - state - discover - catalog config: domain: "https://www.googleapis.com" .... However, if I use self.config in targets namespace I can only read configuration from targets

Don't think that's possible. Curious what your use-case is though?

Meltano does map settings as env vars that are available at run-time: https://docs.meltano.com/guide/configuration/#available-plugin-environment-variables

My target is Elastic and in Elastic when you bulk load records, there is a parameter "op_type". For some taps I will be using "Create" and for others "Index". Since I have one project and multiple extractors, I need to read the configuration from the extractors in the target code (sinks).