A language for specifying ZK circuits

Currently I’m looking for a proof agnostic library or language for specifying arithmetic circuits. I’d like to be able to describe an arithmetic circuit using different components/gadgets, and then compile it for different ZK proof/argument systems. What library or language do you recommend for this?

I know about Circom, but apparently it only supports Groth16… Is Zcash working on any similar language or library?

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