1 files changed, 20 insertions, 0 deletions
diff --git a/app/backends/sglomni/catalog.py b/app/backends/sglomni/catalog.py
index 5ff0c81..61cb11c 100644
--- a/app/backends/sglomni/catalog.py
+++ b/app/backends/sglomni/catalog.py
@@ -96,6 +96,26 @@ _DAC_EXTRAS: Tuple[Extra, ...] = (
     ("descript-audiotools==0.7.2", False),
     ("descript-audio-codec==1.0.0", False))
 
+# Companion distributions whose top-level import name differs from the pip
+# name's plain dash-to-underscore normalization (verified against their
+# top_level.txt). Anything absent here normalizes: qwen-tts -> qwen_tts.
+_EXTRA_IMPORT_OVERRIDES = {
+    "descript-audiotools": "audiotools",
+    "descript-audio-codec": "dac",
+}
+
+
+def extra_import_name(spec: str) -> str:
+    """The Python module an extras requirement SPEC provides.
+
+    Takes the distribution name portion of the pip requirement (so
+    ``qwen-tts==0.1.1`` -> ``qwen_tts``) — the name a venv probe must
+    import to prove the companion is installed."""
+    base = spec.split("=")[0].split("<")[0].split(">")[0].strip()
+    if base in _EXTRA_IMPORT_OVERRIDES:
+        return _EXTRA_IMPORT_OVERRIDES[base]
+    return base.replace("-", "_")
+
 ENTRIES: Tuple[ModelEntry, ...] = (
     ModelEntry(
         key="qwen3_tts_0_6b_customvoice",