Not really. We've talked about a next step being some kind of development environment for this. Our plug-in playground environment comes close to this, but you can't currently set or use plug-in variables in this tool: https://playground.extism.org/

To make development smoother, what I've been doing is separating the game code and the Extism code. Write unit tests and test harness code against your game code and run it on your host machine.

This can be seen in this tictactoe game in rust: https://github.com/extism/game_box/tree/main/games/tictactoe or this trivia game in typescript: https://github.com/extism/game_box/tree/main/games/wasm-triv...