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StarCraft Brood War WASM MCP demo

A short demo post: StarCraft Brood War running in WASM is exposed as an MCP server, Jev is given the game as a tool, and the recorded run still loses to a Zerg rush.

Format
Article
Published by
Community
Last verified
Oct 2026

Highlights

  • The harness is the actual contribution: a Brood War WASM build wrapped as an MCP server so a model can act in the game.
  • The reported result is a loss, with the author noting Jev is impressive but could not withstand a Zerg rush, and that no one could.
  • No repository, prompt, tool schema or game settings are given, so the setup cannot be reproduced from the post.
  • The replies are reactions rather than reports, asking for the system to be evolved and restating the vendor's own launch claims.

Watch out

This is one short post, largely a reaction, and it documents a demo rather than a result. The author's whole claim is that Jev is impressive but cannot withstand a StarCraft Brood War Zerg rush, with the parenthetical that no one can, and that the Brood War WASM build was converted to an MCP server for the demo. Not documented: any repository or link to the WASM-to-MCP wrapper, what actions the server exposes, how many tools there are, what the model is given to observe, whether the prompt restricts it to legal moves, whether the game runs in real time or is stepped, the game settings, and whether the demo is still available. There is no measurement of any kind: no games played, no win rate, no baseline opponent, no latency, no cost, no comparison against another model on the same harness, and no evidence in the capture about Jev version or settings. Nothing separates model capability from harness quality, so the loss cannot be attributed to either. The thread also carries the vendor's own launch announcement rather than an independent measurement. The author is Head of AI in IDE at JetBrains and a cofounder, stated on the profile, which is worth weighing when reading the post as coverage. Copy reviewed against the linked page on 2026-10-04.

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