In the paper "Lightweight Session Programming in Scala", we introduce a "lightweight" integration of session types in the Scala programming language, based on (1) a formal type-level encoding, and (2) a library implementation of linear I/O channels, called lchannels, providing a convenient API for session-based programming, and supporting both local and distributed communication. This artifact is the source code of lchannels, with all the examples and benchmarks discussed in the paper.