v2: automated BIOS platform with full pipeline

Reorganized 6 branches into bios/Manufacturer/Console/.
Scrapers for RetroArch, Batocera, Recalbox, and libretro core-info.
Platform-aware verification replicating native logic per platform.
Pack generation with dedup, alias resolution, variant support.
CI/CD: weekly auto-scrape, auto-release, PR validation.
Large files (>50MB) stored as GitHub Release assets, auto-fetched at build time.

scripts/list_platforms.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+"""List available platforms for CI matrix strategy.
+
+Respects the `status` field in _registry.yml:
+- active: included in CI releases and automated scraping
+- archived: excluded from CI, user can generate manually
+
+Usage:
+    python scripts/list_platforms.py                # Active platforms (for CI)
+    python scripts/list_platforms.py --all           # All platforms including archived
+    python scripts/list_platforms.py >> "$GITHUB_OUTPUT"
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import sys
+from pathlib import Path
+
+try:
+    import yaml
+except ImportError:
+    yaml = None
+
+PLATFORMS_DIR = "platforms"
+
+
+def _load_registry(platforms_dir: str = PLATFORMS_DIR) -> dict:
+    """Load _registry.yml if available."""
+    registry_path = Path(platforms_dir) / "_registry.yml"
+    if yaml and registry_path.exists():
+        with open(registry_path) as f:
+            return yaml.safe_load(f) or {}
+    return {}
+
+
+def list_platforms(include_archived: bool = False) -> list[str]:
+    """List platform config files, filtering by status from _registry.yml."""
+    platforms_dir = Path(PLATFORMS_DIR)
+    if not platforms_dir.is_dir():
+        return []
+
+    registry = _load_registry(str(platforms_dir))
+    registry_platforms = registry.get("platforms", {})
+
+    platforms = []
+    for f in sorted(platforms_dir.glob("*.yml")):
+        if f.name.startswith("_"):
+            continue
+        name = f.stem
+        status = registry_platforms.get(name, {}).get("status", "active")
+        if status == "archived" and not include_archived:
+            continue
+        platforms.append(name)
+
+    return platforms
+
+
+def main():
+    include_all = "--all" in sys.argv
+
+    platforms = list_platforms(include_archived=include_all)
+
+    if not platforms:
+        print("No platform configs found", file=sys.stderr)
+        sys.exit(1)
+
+    github_output = os.environ.get("GITHUB_OUTPUT")
+    if github_output:
+        with open(github_output, "a") as f:
+            f.write(f"platforms={json.dumps(platforms)}\n")
+    else:
+        print(json.dumps(platforms))
+
+
+if __name__ == "__main__":
+    main()