fix: pack only what BizHawk's database names

EmuHawk finds every firmware by SHA1 against FirmwareDatabase.FirmwareRecords, and its cores are its own builds. The registry and the scraper both listed libretro cores whose systems overlap BizHawk's, so the pack shipped Clock Signal, O2EM, FBNeo, VICE and Citra files into Firmware/ that EmuHawk never reads. Both lists are now empty, as MiSTer's are: the database alone decides.

platforms/_registry.yml

@@ -535,48 +535,11 @@ platforms:
     # Windows: names differing only by case land on one file.
     case_insensitive_fs: true
     schedule: monthly
-    cores:
-    - applewin
-    - azahar
-    - beetle_ngp
-    - beetle_pce
-    - beetle_pcfx
-    - beetle_psx
-    - beetle_saturn
-    - beetle_vb
-    - beetle_wswan
-    - bsnes
-    - citra
-    - citra2018
-    - citra_canary
-    - clk
-    - fbneo
-    - freechaf
-    - freeintv
-    - gambatte
-    - genesis_plus_gx
-    - handy
-    - mame
-    - melonds
-    - mgba
-    - mupen64plus_next
-    - numero
-    - o2em
-    - opera
-    - panda3ds
-    - picodrive
-    - ppsspp
-    - prboom
-    - prosystem
-    - puae
-    - quicknes
-    - sameboy
-    - snes9x
-    - stella
-    - trident
-    - vecx
-    - vice_x64
-    - virtualjaguar
+    # EmuHawk finds firmware by SHA1 against FirmwareDatabase.FirmwareRecords
+    # and its cores are its own builds (CoreNames.cs): no libretro profile
+    # describes what it reads, so the database alone decides, as MiSTer's
+    # BiosDB does.
+    cores: []
     target_scraper: null
     target_source: null
     install:

platforms/bizhawk.yml

@@ -5,33 +5,7 @@ source: "https://raw.githubusercontent.com/TASEmulators/BizHawk/2.11.1/src/BizHa
 base_destination: Firmware
 hash_type: sha1
 verification_mode: sha1
-cores:
-- gambatte
-- mgba
-- sameboy
-- melonds
-- snes9x
-- bsnes
-- beetle_psx
-- beetle_saturn
-- beetle_pce
-- beetle_pcfx
-- beetle_wswan
-- beetle_vb
-- beetle_ngp
-- opera
-- stella
-- picodrive
-- ppsspp
-- handy
-- quicknes
-- genesis_plus_gx
-- mupen64plus_next
-- puae
-- prboom
-- virtualjaguar
-- vice_x64
-- mame
+cores: []
 systems:
   sega-32x:
     files:

scripts/scraper/bizhawk_scraper.py

@@ -105,38 +105,13 @@ SYSTEM_ID_MAP: dict[str, str] = {
     "ZXSpectrum": "sinclair-zx-spectrum",
 }
 
-# Cores that overlap with BizHawk's system coverage
-BIZHAWK_CORES = [
-    "gambatte",
-    "mgba",
-    "sameboy",
-    "melonds",
-    "snes9x",
-    "bsnes",
-    "beetle_psx",
-    "beetle_saturn",
-    "beetle_pce",
-    "beetle_pcfx",
-    "beetle_wswan",
-    "beetle_vb",
-    "beetle_ngp",
-    "opera",
-    "stella",
-    "picodrive",
-    "ppsspp",
-    "handy",
-    "quicknes",
-    "genesis_plus_gx",
-    # Ares64 is BizHawk's N64 core only. Its firmware (the 64DD IPL) is in
-    # FirmwareDatabase.cs. The ares profile's thirty systems are not what
-    # BizHawk runs ares for.
-    "mupen64plus_next",
-    "puae",
-    "prboom",
-    "virtualjaguar",
-    "vice_x64",
-    "mame",
-]
+# EmuHawk looks every firmware up by SHA1 against FirmwareDatabase.FirmwareRecords
+# (FirmwareManager.cs), and its cores are its own builds (CoreNames.cs). A
+# libretro profile of the same upstream emulator describes what that libretro
+# build opens, not what EmuHawk reads: listing them by overlapping systems
+# shipped Clock Signal, O2EM, FBNeo and VICE files into Firmware/. The
+# database alone decides what the pack carries.
+BIZHAWK_CORES: list[str] = []
 
 
 def _safe_arithmetic(expr: str) -> int:

tests/test_scraper_contract.py

@@ -451,6 +451,18 @@ class BizHawkRunsAresForN64Only(unittest.TestCase):
         self.assertNotIn("ares", platform["cores"])
         self.assertNotIn("ares", registry["platforms"]["bizhawk"]["cores"])
 
+    def test_no_profile_speaks_for_emuhawk(self):
+        """EmuHawk finds firmware by SHA1 in its own database. Cores listed
+        for overlapping systems shipped 400 files it never reads (Clock
+        Signal, O2EM, FBNeo, VICE)."""
+        import yaml
+
+        root = Path(__file__).resolve().parents[1]
+        platform = yaml.safe_load((root / "platforms" / "bizhawk.yml").read_text())
+        registry = yaml.safe_load((root / "platforms" / "_registry.yml").read_text())
+        self.assertEqual(platform["cores"], [])
+        self.assertEqual(registry["platforms"]["bizhawk"]["cores"], [])
+
 
 class EveryTargetCoreReachesAProfile(unittest.TestCase):
     """A target lists cores by their buildbot or package name. A name no