chore(root): scaffold monorepo — Phase 0 complete

eslint.config.js

@@ -0,0 +1,38 @@
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+  {
+    ignores: ["**/dist/**", "**/node_modules/**", "**/*.js", "**/*.mjs"],
+  },
+  ...tseslint.configs.recommended,
+  {
+    rules: {
+      "@typescript-eslint/no-explicit-any": "error",
+      "@typescript-eslint/no-unused-vars": ["error", { argsIgnorePattern: "^_" }],
+    },
+  },
+  // Engine RHS purity: ban impure globals in rete/src
+  {
+    files: ["packages/rete/src/**/*.ts"],
+    rules: {
+      "no-restricted-globals": [
+        "error",
+        { name: "Date", message: "RHS purity: use session.now() instead" },
+        { name: "performance", message: "RHS purity: forbidden in engine" },
+        { name: "setTimeout", message: "RHS purity: forbidden in engine" },
+        { name: "setInterval", message: "RHS purity: forbidden in engine" },
+        { name: "clearTimeout", message: "RHS purity: forbidden in engine" },
+        { name: "clearInterval", message: "RHS purity: forbidden in engine" },
+        { name: "fetch", message: "RHS purity: forbidden in engine" },
+        { name: "console", message: "RHS purity: use debug flag instead" },
+      ],
+      "no-restricted-syntax": [
+        "error",
+        {
+          selector: "MemberExpression[object.name='Math'][property.name='random']",
+          message: "RHS purity: Math.random() forbidden in engine",
+        },
+      ],
+    },
+  }
+);