fix: quote rom and core names in yaml

YAML 1.1 reads an unquoted 01 as the integer 1 and 81 as 81, so the
manager set stopped naming the file its driver opens and the API
published "cores": [2048] as a number where consumers match strings.

Ground truth from MAME 0.289 at the revision the profile cites:
src/mame/vtech/crvision.cpp:957 loads "01" and "23".

The root cause was the scraper: _hash_merge wrote these names through an
f-string, so quoting the profiles alone would be undone on the next
refresh. _yaml_scalar now quotes every name, archive and description it
writes.

emulators/2048.yml

@@ -7,7 +7,7 @@ profiled_date: "2026-03-22"
 source_commit: "e70c3f82d2b861c64943aaff7fcc29a63013997d"
 core_version: "1.0"
 display_name: "2048"
-cores: [2048]
+cores: ["2048"]
 systems: []
 files: []
 notes: >

emulators/81.yml

@@ -7,7 +7,7 @@ profiled_date: "2026-03-22"
 source_commit: "fa7094910d040baa5fd8b11dbf6a1a618330ecd9"
 core_version: "1.0a"
 display_name: "Sinclair - ZX 81 (EightyOne)"
-cores: [81]
+cores: ["81"]
 systems:
   - sinclair-zx81
   - sinclair-zx80

emulators/mame.yml

@@ -3543,11 +3543,11 @@ files:
     source_ref: "src/mame/vtech/crvision.cpp:955-959"
     note: "Salora Manager (Finnish variant)"
     contents:
-      - name: 01
+      - name: "01"
         description: ROM bank 0-1
         size: 8192
         crc32: "702f4cf5"
-      - name: 23
+      - name: "23"
         description: ROM bank 2-3
         size: 8192
         crc32: "46489d88"

install/targets/retrobat.json

@@ -1,6 +1,6 @@
 {
   "windows": [
-    81,
+    "81",
     "a5200",
     "abuse",
     "arduous",

platforms/targets/retrobat.yml

@@ -4,7 +4,7 @@ scraped_at: "2026-03-26T00:00:00Z"
 targets:
   windows:
     architecture: x86_64
-    cores: [81, a5200, abuse, arduous, atari800, azahar, bennugd, bk, bluemsx, bsnes,
+    cores: ['81', a5200, abuse, arduous, atari800, azahar, bennugd, bk, bluemsx, bsnes,
       bstone, cannonball, cap32, catacombgl, cdogs, cemu, cgenius, citron, clk, corsixth,
       demul, devilutionx, dhewm3, dice, dolphin, dosbox_pure, dxx-rebirth, easyrpg,
       ecwolf, eduke32, eka2l1, emuscv, etlegacy, fake08, fallout1-ce, fallout2-ce,

scripts/scraper/_hash_merge.py

@@ -507,7 +507,7 @@ def _append_new_entries(text: str, files: list[dict], original: str) -> str:
 
     lines = []
     for fe in new_entries:
-        lines.append(f"\n  - name: {fe['name']}")
+        lines.append(f"\n  - name: {_yaml_scalar(fe['name'])}")
         lines.append(f"    required: {str(fe['required']).lower()}")
         lines.append("    category: bios_zip")
         if fe.get("source_ref"):
@@ -521,13 +521,22 @@ def _append_new_entries(text: str, files: list[dict], original: str) -> str:
     return text
 
 
+def _yaml_scalar(value) -> str:
+    """Quote a scalar so YAML reads back exactly what the source said.
+
+    A MAME ROM named ``01`` written bare re-parses as the integer 1, and the
+    set stops naming the file the driver loads. Quoting is not cosmetic here.
+    """
+    return json.dumps(str(value), ensure_ascii=False)
+
+
 def _format_contents(contents: list[dict]) -> str:
     """Format a contents list as YAML text."""
     lines = ["    contents:"]
     for rom in contents:
-        lines.append(f"      - name: {rom['name']}")
+        lines.append(f"      - name: {_yaml_scalar(rom['name'])}")
         if rom.get("description"):
-            lines.append(f"        description: {rom['description']}")
+            lines.append(f"        description: {_yaml_scalar(rom['description'])}")
         if rom.get("size"):
             lines.append(f"        size: {rom['size']}")
         if rom.get("crc32"):
@@ -569,8 +578,8 @@ def _backup_and_write_fbneo(path: str, data: dict, hashes: dict) -> None:
     if new_roms:
         lines = []
         for fe in new_roms:
-            lines.append(f'  - name: "{fe["name"]}"')
-            lines.append(f"    archive: {fe['archive']}")
+            lines.append(f"  - name: {_yaml_scalar(fe['name'])}")
+            lines.append(f"    archive: {_yaml_scalar(fe['archive'])}")
             lines.append(f"    required: {str(fe.get('required', True)).lower()}")
             if fe.get("size"):
                 lines.append(f"    size: {fe['size']}")

tests/test_hash_merge.py

@@ -196,6 +196,52 @@ class TestMameMerge(unittest.TestCase):
             self.assertTrue(pgm["required"])
             self.assertEqual(pgm["category"], "bios_zip")
 
+    def test_numeric_looking_rom_name_survives_the_write(self) -> None:
+        """MAME ships ROMs named 01 and 23. Bare YAML turns them into numbers.
+
+        The manager set loads "01"; written unquoted it re-parses as the
+        integer 1 and the profile stops naming the file the driver opens.
+        """
+        from scripts.scraper._hash_merge import (
+            _append_new_entries,
+            _format_contents,
+        )
+
+        contents = [
+            {"name": "01", "description": "ROM bank 0-1", "size": 8192,
+             "crc32": "702f4cf5"},
+            {"name": "23", "description": "ROM bank 2-3", "size": 8192,
+             "crc32": "46489d88"},
+        ]
+        document = yaml.safe_load(
+            "files:\n  - name: manager.zip\n" + _format_contents(contents)
+        )
+        names = [rom["name"] for rom in document["files"][0]["contents"]]
+        self.assertEqual(names, ["01", "23"])
+        for name in names:
+            self.assertIsInstance(name, str)
+
+        original = "emulator: MAME\nfiles:\n  - name: neogeo.zip\n"
+        appended = _append_new_entries(
+            original,
+            [{
+                "name": "manager.zip",
+                "required": False,
+                "category": "bios_zip",
+                "source_ref": "src/mame/vtech/crvision.cpp:955-959",
+                "contents": contents,
+            }],
+            original,
+        )
+        entry = next(
+            f
+            for f in yaml.safe_load(appended)["files"]
+            if f["name"] == "manager.zip"
+        )
+        self.assertEqual(
+            [rom["name"] for rom in entry["contents"]], ["01", "23"]
+        )
+
     def test_merge_preserves_non_bios_files(self) -> None:
         profile = _make_mame_profile()
         profile["files"].append({"name": "hiscore.dat", "required": False})