Fix 'pytheory play' chord name parsing for names containing digits

Chord names like Cmaj7 and G7 were incorrectly treated as tone names
because they contain digits. Now tries chord name lookup first. v0.5.1.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "pytheory"
-version = "0.5.0"
+version = "0.5.1"
 description = "Music Theory for Humans"
 readme = "README.md"
 license = "MIT"

pytheory/cli.py

@@ -100,14 +100,23 @@ def cmd_play(args):
     synth = synth_map[args.synth]
     duration = args.duration
 
-    # Parse notes — if single note, play as tone; otherwise as chord.
-    tones = [Tone.from_string(n if any(c.isdigit() for c in n) else f"{n}4",
-                              system="western") for n in args.notes]
-
-    if len(tones) == 1:
-        target = tones[0]
-        label = target.full_name
+    # Try chord name first (e.g. "Am", "Cmaj7"), then fall back to individual notes.
+    if len(args.notes) == 1:
+        note = args.notes[0]
+        # Try as chord name first (Am, G7, Cmaj7, etc.)
+        try:
+            target = Chord.from_name(note)
+            name = target.identify() or note
+            label = f"{name} ({' '.join(t.full_name for t in target.tones)})"
+        except (ValueError, KeyError):
+            # Fall back to single tone
+            target = Tone.from_string(
+                note if any(c.isdigit() for c in note) else f"{note}4",
+                system="western")
+            label = target.full_name
     else:
+        tones = [Tone.from_string(n if any(c.isdigit() for c in n) else f"{n}4",
+                                  system="western") for n in args.notes]
         target = Chord(tones=tones)
         name = target.identify() or "Custom"
         label = f"{name} ({' '.join(t.full_name for t in tones)})"