MoonWren Copyright 2026 MoonWren contributors MoonWren is an independent MoonBit implementation of the Wren language. The public language documentation and compatibility behavior of Wren are used as references. Selected unmodified Wren 0.4.0 test inputs under conformance/wren-0.4.0 are included for differential testing. Wren is available at https://github.com/wren-lang/wren and is distributed under the MIT License by Robert Nystrom and contributors. The built-in `random` and `meta` optional modules reproduce the public API and algorithms of Wren 0.4.0's optional modules. Their MoonBit implementation is adapted from that MIT-licensed reference behavior. The command-line package depends on moonbitlang/x, distributed under the Apache License 2.0 by the MoonBit project contributors.