Add speaker-attributed meeting transcription

tests/test_openrouter_client.py

@@ -20,6 +20,7 @@ from openrouter_client import (
     _transcribe_chunk,
     summarize,
     transcribe,
+    transcribe_tracks,
 )
 
 
@@ -226,3 +227,76 @@ def test_chat_completion_reports_provider_fallback_when_all_summarizers_fail(mon
     assert "Summarization failed across providers" in message
     assert "OpenRouter summarization returned empty content" in message
     assert "direct OpenAI summarization fallback skipped" in message
+
+
+def test_transcribe_tracks_labels_each_speaker_block(tmp_path: Path, monkeypatch):
+    alice = tmp_path / "alice.wav"
+    bob = tmp_path / "bob.wav"
+    alice.write_bytes(b"alice audio")
+    bob.write_bytes(b"bob audio")
+    calls = []
+
+    async def fake_transcribe(path: str) -> str:
+        calls.append(Path(path).name)
+        return {
+            "alice.wav": "I finished the API work.",
+            "bob.wav": "I will test it tomorrow.",
+        }[Path(path).name]
+
+    monkeypatch.setattr(openrouter_client, "transcribe", fake_transcribe)
+
+    result = asyncio.run(
+        transcribe_tracks(
+            [
+                {"display_name": "Alice", "path": str(alice)},
+                {"display_name": "Bob", "path": str(bob)},
+            ]
+        )
+    )
+
+    assert result == "[Alice]\nI finished the API work.\n\n[Bob]\nI will test it tomorrow."
+    assert calls == ["alice.wav", "bob.wav"]
+
+
+def test_transcribe_tracks_skips_failed_tracks_when_at_least_one_succeeds(tmp_path: Path, monkeypatch):
+    alice = tmp_path / "alice.wav"
+    bob = tmp_path / "bob.wav"
+    alice.write_bytes(b"alice audio")
+    bob.write_bytes(b"bob audio")
+
+    async def fake_transcribe(path: str) -> str:
+        if Path(path).name == "bob.wav":
+            raise RuntimeError("provider down")
+        return "Alice spoke."
+
+    monkeypatch.setattr(openrouter_client, "transcribe", fake_transcribe)
+
+    result = asyncio.run(
+        transcribe_tracks(
+            [
+                {"display_name": "Alice", "path": str(alice)},
+                {"display_name": "Bob", "path": str(bob)},
+            ]
+        )
+    )
+
+    assert result == "[Alice]\nAlice spoke."
+
+
+def test_transcribe_tracks_raises_when_no_tracks_produce_text(tmp_path: Path, monkeypatch):
+    alice = tmp_path / "alice.wav"
+    alice.write_bytes(b"alice audio")
+
+    async def fake_transcribe(_path: str) -> str:
+        return ""
+
+    monkeypatch.setattr(openrouter_client, "transcribe", fake_transcribe)
+
+    try:
+        asyncio.run(transcribe_tracks([{"display_name": "Alice", "path": str(alice)}]))
+    except RuntimeError as exc:
+        message = str(exc)
+    else:
+        raise AssertionError("Expected transcribe_tracks failure")
+
+    assert "Speaker-track transcription produced no text" in message