feat: implement Famicom-style MML composer MCP server

- Add FastMCP server with compose_mml tool

- Support ppmck and pyxel MML syntax

- Add lexer and parsers for both formats

- Add NES APU-style synthesizer (pulse/triangle/noise) to WAV

- Add MML templates (basic/melody/chord/drum/empty) for both modes

- Add tests for lexer, parser, and server

- Support stdio, http, sse, streamable-http transports

- Update README, pyproject.toml, and .gitignore

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/test_parser.py b/tests/test_parser.py
new file mode 100644
index 0000000..b263aac
--- /dev/null
+++ b/tests/test_parser.py
@@ -0,0 +1,53 @@
+"""Tests for PPMCK and Pyxel parsers."""
+
+from mml_composemusic_mcp.ir import NoteEvent
+from mml_composemusic_mcp.lexer import tokenize
+from mml_composemusic_mcp.parser_ppmck import parse_ppmck
+from mml_composemusic_mcp.parser_pyxel import parse_pyxel
+
+PPMCK_EXAMPLE = """#TITLE "Test"
+A t150 l8 o4 v15 q2
+  c d e f
+B o3
+  c e g
+"""
+
+PYXEL_EXAMPLE = """0: T150 L8 O4 V100 @1
+  C D E F
+1: O3
+  C E G
+"""
+
+
+def test_ppmck_parse():
+    tokens = tokenize(PPMCK_EXAMPLE, "ppmck")
+    ns, errors = parse_ppmck(PPMCK_EXAMPLE, tokens)
+    assert not any(e.severity == "error" for e in errors)
+    assert ns.channels["Pulse1"].events
+    assert ns.channels["Pulse2"].events
+    notes = [e for e in ns.channels["Pulse1"].events if isinstance(e, NoteEvent)]
+    assert notes[0].note_number == 60  # C4
+
+
+def test_pyxel_parse():
+    tokens = tokenize(PYXEL_EXAMPLE, "pyxel")
+    ns, errors = parse_pyxel(PYXEL_EXAMPLE, tokens)
+    assert not any(e.severity == "error" for e in errors)
+    assert ns.channels["Pulse1"].events
+    notes = [e for e in ns.channels["Pulse1"].events if isinstance(e, NoteEvent)]
+    assert notes[0].note_number == 60  # C4
+
+
+def test_pyxel_repeat_expansion():
+    source = "0: T120 L4 O4\n[ C D ]2"
+    tokens = tokenize(source, "pyxel")
+    ns, errors = parse_pyxel(source, tokens)
+    notes = [e for e in ns.channels["Pulse1"].events if isinstance(e, NoteEvent)]
+    assert len(notes) == 4
+
+
+def test_invalid_mode_error():
+    from mml_composemusic_mcp.server import _parse_mml
+
+    seq, errors = _parse_mml("A c", "unknown")
+    assert any(e.severity == "error" for e in errors)