fix: projects saved while the video/audio Load Media nodes existed drop those slots instead of failing to load

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CHWxqHtxwWrq4kEyFTaHds

modules/media/load/__init__.py

@@ -13,3 +13,25 @@ CATEGORY = "system"
 STATUS = "proven"
 
 NODES = [FunPackLoadMedia]
+
+
+#: Two dev builds briefly shipped a node each for video and audio; Load Media does both now.
+_GONE = ("FunPackLoadMediaVideo", "FunPackLoadMediaAudio")
+
+
+def upgrade(slots, outputs):
+    """Pipelines saved while those nodes existed lose their slots (the app wires references per run) and any wire from them."""
+    dead = {s["id"] for s in slots if s.get("node") in _GONE}
+    if not dead:
+        return slots
+    out = []
+    for s in slots:
+        if s["id"] in dead:
+            continue
+        inputs = {k: v for k, v in (s.get("inputs") or {}).items()
+                  if not (isinstance(v, (list, tuple)) and v and v[0] in dead)}
+        out.append({**s, "inputs": inputs})
+    return out
+
+
+PROVIDES = {"upgrade_slots": upgrade}

modules/media/load/tests/test_load_media.py

@@ -109,3 +109,13 @@ def test_audio_loads_as_audio(store):
     entry = media.save_upload("a.wav", path.read_bytes())
     _, _, audio = FunPackLoadMedia.execute(entry["id"], full=True).result
     assert audio["sample_rate"] == 8000 and audio["waveform"].shape == (1, 1, 800)
+
+
+def test_slots_of_the_retired_video_and_audio_nodes_are_dropped_with_their_wires():
+    from modules.media.load import upgrade
+    slots = [{"id": "r2v", "node": "X", "inputs": {"a": ["v1", 1], "keep": 3, "b": ["ref", 0]}},
+             {"id": "v1", "node": "FunPackLoadMediaVideo", "inputs": {}},
+             {"id": "ref", "node": "FunPackLoadMedia", "inputs": {}}]
+    out = upgrade(slots, None)
+    assert [s["id"] for s in out] == ["r2v", "ref"]
+    assert out[0]["inputs"] == {"keep": 3, "b": ["ref", 0]}