feat: release packs for marked platforms only

release_pack: true in the registry is the list a release builds: RetroArch,
EmuDeck, RetroBat, Batocera, RomM and MiSTer, 83% of the downloads of
v2026.10.10. generate_pack --all, --verify-packs, the pipeline consistency
step, release_record and check_release read it. Manifests are still written
for every platform.

tests/test_tool_messages.py

@@ -346,7 +346,8 @@ class ListPlatformsTakesTheSharedFlag(unittest.TestCase):
         )
         self.assertEqual(proc.returncode, 0, proc.stderr)
         lines = proc.stdout.splitlines()
-        self.assertIn("retropie (archived)", lines)
+        self.assertIn("retropie (archived, installer only)", lines)
+        self.assertIn("knulli (installer only)", lines)
         self.assertIn("retroarch", lines)
 
 

tests/test_verify_pack_choice.py

@@ -140,12 +140,19 @@ class VerifyPackChoice(unittest.TestCase):
             self._run(self._args())
         self.assertEqual(out.getvalue().strip().splitlines()[-1], "Verified 1 pack: all OK")
 
-    def test_include_archived_reaches_the_archived_pack(self):
+    def test_the_sweep_checks_release_packs_and_a_named_platform_its_own(self):
+        """--all checks the packs a release publishes (release_pack): the
+        RetroPie pack, archived and served by the installer, is left to a
+        check that names it."""
         stem = self.gp._platform_pack_stem(["retropie"], "retropie", "platforms")
         self._touch(f"{stem}_BIOS_Pack.zip")
+        self._touch(f"{self.stem}_BIOS_Pack.zip")
         checked = self._run(
             self._args(platform=None, all=True, include_archived=True)
         )
+        self.assertIn(("retroarch", f"{self.stem}_BIOS_Pack.zip"), checked)
+        self.assertNotIn(("retropie", f"{stem}_BIOS_Pack.zip"), checked)
+        checked = self._run(self._args(platform="retropie"))
         self.assertIn(("retropie", f"{stem}_BIOS_Pack.zip"), checked)