feat(@projects/@magic-civilization): ✨ update physics engine metadata and stub file

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

public/games/age-of-dwarves/data/objectives.json

@@ -1,11 +1,11 @@
 {
-  "generated_at": "2026-04-17T22:06:32Z",
+  "generated_at": "2026-04-17T22:13:53Z",
   "totals": {
-    "stub": 6,
     "done": 35,
-    "missing": 10,
     "partial": 17,
+    "stub": 6,
     "oos": 9,
+    "missing": 10,
     "total": 77
   },
   "objectives": [

src/game/engine/src/autoloads/data_loader.gd

@@ -24,6 +24,7 @@ const _RESOURCES_DIR_MAP: Dictionary = {
 	"throne_room": "throne_rooms",
 	"homeworlds": "worlds",
 	"resources": "deposits",
+	"techs": "techs",
 	"world_biomes": "ecology/biomes",
 	"world_flora": "ecology/flora",
 	"world_fauna": "ecology/fauna",

src/simulator/package.json

@@ -1,10 +1,12 @@
 {
   "name": "@magic-civ/physics-rs",
   "version": "0.1.0",
-  "description": "Rust physics engine — compiled to WASM for web, GDExtension for Godot. Build output lives at repo-root .local/build/wasm/ (gitignored, per-host). Consumers resolve via Vite/Vitest alias — this package has no `main`/`types` because Node's resolver can't follow `../../` out of the package root cleanly through pnpm symlinks, and the artifact's true location is outside this package tree.",
+  "description": "Rust physics engine — compiled to WASM for web, GDExtension for Godot. Build output lives at repo-root .local/build/wasm/ (gitignored, per-host; see .claude/instructions/build-output-locations.md). Browser / Vite / Vitest consumers resolve via the explicit alias in vite.config.ts pointing directly at .local/build/wasm/. Node-side consumers (simCachePlugin workers, build-time sim-cache baker) go through runner-stub.mjs which re-exports from the same path — needed because Node's ESM resolver can't follow `../../` out of a package root through pnpm symlinks.",
+  "type": "module",
+  "main": "./runner-stub.mjs",
   "scripts": {
     "build": "bash build-wasm.sh",
     "build:gdext": "bash build-gdext.sh"
   },
-  "files": []
+  "files": ["runner-stub.mjs"]
 }

src/simulator/runner-stub.mjs

@@ -0,0 +1,22 @@
+// Runtime resolver for @magic-civ/physics-rs — delegates to the repo-local
+// wasm-pack output at .local/build/wasm/magic_civ_physics.js.
+//
+// Why this file exists: the canonical WASM artifact lives outside the
+// @magic-civ/physics-rs package root (at repo-root .local/build/wasm/ per
+// the "build output never under src/" rule in
+// .claude/instructions/build-output-locations.md). Node's ESM resolver
+// cannot follow a package.json `main` whose path segments escape the
+// package root via `../` — tsx in particular collapses `..` segments
+// incorrectly through pnpm symlinks and tries to resolve the path under
+// node_modules/. A stub file inside the package tree that re-exports from
+// the absolute build-output path sidesteps the issue cleanly.
+//
+// This module is only consulted by Node-side tooling (tsx workers spawned
+// by simCachePlugin, the build-time sim-cache baker, etc.). Browser /
+// Vite / Vitest consumers bypass it entirely via the explicit
+// `@magic-civ/physics-rs` alias in vite.config.ts + vitest.config.ts,
+// which points directly at .local/build/wasm/magic_civ_physics.js.
+//
+// Related objectives: p2-20 (this fix) and p2-21 (static-bake consumer).
+
+export * from '../../.local/build/wasm/magic_civ_physics.js'