refactor: scope validation to a platform's cores

scripts/generate_pack.py

@@ -597,14 +597,17 @@ def generate_pack(
     file_status: dict[str, str] = {}
     file_reasons: dict[str, str] = {}
 
-    # Build emulator-level validation index (same as verify.py)
-    validation_index = {}
-    if emu_profiles:
-        validation_index = _build_validation_index(emu_profiles)
-
-    # Filter systems by target if specified
+    # Build emulator-level validation index from the platform's own
+    # emulators (same scope as verify.py)
     from common import resolve_platform_cores
 
+    validation_index = {}
+    if emu_profiles:
+        validation_index = _build_validation_index(
+            {name: emu_profiles[name] for name in resolve_platform_cores(config, emu_profiles)}
+        )
+
+    # Filter systems by target if specified
     plat_cores = (
         resolve_platform_cores(config, emu_profiles or {}) if target_cores else None
     )

scripts/verify.py

@@ -811,10 +811,18 @@ def verify_platform(
         for f in profile.get("files", []):
             if f.get("hle_fallback"):
                 hle_index[f.get("name", "")] = True
-    validation_index = _build_validation_index(profiles)
+    # Ground truth comes from the emulators the platform runs. A standalone
+    # profile that loads a same-named file of its own (ZEsarUX's 48K
+    # cpc6128.rom against cap32's 32K one) has nothing to say about a
+    # RetroArch pack.
+    plat_cores = resolve_platform_cores(config, profiles)
+    validation_index = _build_validation_index(
+        {name: profiles[name] for name in plat_cores}
+    )
 
     # Filter systems by target
-    plat_cores = resolve_platform_cores(config, profiles) if target_cores else None
+    if not target_cores:
+        plat_cores = None
     verify_systems = filter_systems_by_target(
         config.get("systems", {}),
         profiles,