feat: reggaeton production system with intelligent sample selection and FLP generation

scripts/build_from_json.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""CLI: build a single FLP from a JSON song definition.
+
+Usage:
+    python scripts/build_from_json.py <song.json> [--out <output.flp>]
+"""
+import argparse
+import sys
+from pathlib import Path
+
+# Add project root to path
+sys.path.insert(0, str(Path(__file__).parents[1]))
+
+from src.flp_builder.schema import load_song_json
+from src.flp_builder.builder import FLPBuilder
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Build FLP from JSON song definition"
+    )
+    parser.add_argument("song_json", help="Path to song .json file")
+    parser.add_argument(
+        "--out", help="Output .flp path (default: same name as JSON)"
+    )
+    args = parser.parse_args()
+
+    json_path = Path(args.song_json)
+    out_path = (
+        Path(args.out) if args.out else json_path.with_suffix(".flp")
+    )
+
+    song = load_song_json(json_path)
+    builder = FLPBuilder()
+    flp = builder.build(song)
+
+    out_path.write_bytes(flp)
+    print(f"Built {out_path} ({len(flp):,} bytes)")
+
+
+if __name__ == "__main__":
+    main()