Initial commit

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/node_pre.js

@@ -0,0 +1,5 @@
+// Headless node runs of the emscripten build: SDL looks for hints in the page's URL, which node doesn't have, and the
+// game reads RPG_SEED and friends from the environment, which emscripten doesn't pass through by itself.
+globalThis.window = globalThis.window || { location: { search: "" } };
+Module.preRun = Module.preRun || [];
+Module.preRun.push(() => Object.assign(ENV, process.env));