RS-SDK
A TypeScript SDK, agent documentation and private server emulator for building and running bots inside a RuneScape-style game, built as a testing environment for coding-agent research rather than for the live commercial game.
RS-SDK is a research-oriented starter kit for building bots in a RuneScape-style game, providing a TypeScript SDK, agent-facing documentation and bindings, and its own server emulator, forked from the open-source LostCity engine and client rather than connecting to the commercial game. It is meant as a safe, bot-only setting for experimenting with goal-directed program synthesis techniques and for studying how agents collaborate and compete.
A bot connects to a provided demo server under a chosen username; high-level bot methods try to observe the actual in-game effect of an action, while lower-level methods only confirm that the client sent a request, not that the server applied it. Code can be run through an MCP execute_code tool, which receives bot and sdk objects directly, or as standalone scripts. A public leaderboard ranks bots on the demo server by account level reached per unit of playtime, and a benchmark compares different language models on the task.
It is written in TypeScript and is typically driven with a coding agent such as Claude Code.