Rapier 2D (@dimforge/rapier2d-compat 0.20) comes in as the physics engine: the editor loads it once in the background right after opening a project from its own chunk, so the main bundle grows by 0.19 KB gzip and the first frame does not wait; loadPhysics, physicsStatus and the 100 px = 1 m conversion live in src/runtime/physics/engine.ts, __gm.physics() reports the state, unit tests pin free fall and a box resting on a box, and e2e module 41 pins that Rapier is ready from its own chunk without console noise (#145)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

package-lock.json

@@ -8,6 +8,7 @@
       "name": "game-maker",
       "version": "0.1.0",
       "dependencies": {
+        "@dimforge/rapier2d-compat": "^0.20.0",
         "pixi.js": "^8.6.0"
       },
       "devDependencies": {
@@ -47,6 +48,12 @@
         "keyv": "^5.6.0"
       }
     },
+    "node_modules/@dimforge/rapier2d-compat": {
+      "version": "0.20.0",
+      "resolved": "https://registry.npmjs.org/@dimforge/rapier2d-compat/-/rapier2d-compat-0.20.0.tgz",
+      "integrity": "sha512-FFYwGrfJov7d5kn4fxblG/ip5C+sYQL+Jl/hqLvDvu4BcMD/Mhrz7cTvnZTtuIRDXY8CLuraObqB/prip4wdWQ==",
+      "license": "Apache-2.0"
+    },
     "node_modules/@esbuild/aix-ppc64": {
       "version": "0.25.12",
       "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.25.12.tgz",