feat(grid-agent): add embodied behavior controller (#125)

crates/metacrate-grid-agent/tests/dependency_policy.rs

@@ -43,10 +43,10 @@ fn package_has_only_reviewed_rust_dependencies_and_no_build_script() {
 #[test]
 fn runtime_source_has_no_subprocess_or_native_abi_escape_hatch() {
     let source = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("src");
-    let mut files = Vec::with_capacity(18);
+    let mut files = Vec::with_capacity(20);
     collect_rust_files(&source, &mut files);
     assert!(
-        files.len() <= 18,
+        files.len() <= 20,
         "source-file count needs a reviewed bound update"
     );
     for path in files {
@@ -116,6 +116,37 @@ fn live_session_adapter_reuses_native_lifecycle_and_messaging_managers() {
     assert!(!backend.contains("reqwest"));
 }
 
+#[test]
+fn embodied_adapter_uses_only_reviewed_high_level_native_movement() {
+    let root = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    let backend = fs::read_to_string(root.join("src/backend.rs")).expect("backend source");
+    for required in [
+        ".movement\n                .turn_toward(",
+        ".auto_pilot_local(",
+        ".auto_pilot_cancel()",
+        ".get_parcel_local_id(",
+        ".sit()",
+        ".stand()",
+    ] {
+        assert!(
+            backend.contains(required),
+            "missing native embodiment mapping {required}"
+        );
+    }
+    let behavior = fs::read_to_string(root.join("src/behavior.rs")).expect("behavior source");
+    for forbidden in [
+        "Teleport(",
+        "TouchObject(",
+        "set_agent_controls(",
+        "FollowAvatar(",
+    ] {
+        assert!(
+            !behavior.contains(forbidden),
+            "model-facing behavior contains forbidden primitive {forbidden}"
+        );
+    }
+}
+
 fn collect_rust_files(directory: &Path, output: &mut Vec<PathBuf>) {
     for entry in fs::read_dir(directory).expect("read source directory") {
         let path = entry.expect("source entry").path();