This is the WebAssmebly back-end for waCoq (currently a subsidiary of jsCoq). It is meant to be used internally by waCoq. For the frontend, see here (GitHub) and here (npm).
This package contains:
icoq.bc, which is compiled OCaml bytecode of Coq with a JSON interface for accessing the STM.dllcoqrun_stubs.wasm, which contains stubs for C primitives (with empty implementations -- the native compiler and VM are turned off)..coq-pkgarchives for the Coq standard library bundle.