diff --git a/src/teampulse/memo.py b/src/teampulse/memo.py
new file mode 100644
index 0000000..993f10c
--- /dev/null
+++ b/src/teampulse/memo.py
@@ -0,0 +1,49 @@
+from datetime import datetime
+from pathlib import Path
+
+from teampulse.models import AuditWindow
+
+
+def generate_memo(window: AuditWindow) -> str:
+    filtered = [
+        e for e in window.entries
+        if e.display_name != window.presenter and e.display_name != window.moderator
+    ]
+    sorted_entries = sorted(filtered, key=lambda e: e.email)
+
+    start = window.start_time.strftime("%H:%M:%S")
+    end = window.end_time.strftime("%H:%M:%S")
+
+    lines = [
+        "# Meeting Chat Audit",
+        f"Zeitfenster: {start} – {end}",
+        "",
+    ]
+
+    if not sorted_entries:
+        lines += [
+            f"## Teilnehmer am Vortrag von {window.presenter} (0)",
+            f"_Moderator: {window.moderator} — Vortragender und Moderator ausgeschlossen_",
+            "",
+            "_Keine Chat-Aktivität in diesem Zeitfenster._",
+        ]
+    else:
+        lines += [
+            f"## Teilnehmer am Vortrag von {window.presenter} ({len(sorted_entries)})",
+            f"_Moderator: {window.moderator} — Vortragender und Moderator ausgeschlossen_",
+            "",
+        ]
+        for entry in sorted_entries:
+            lines.append(f"- {entry.display_name} <{entry.email}>")
+
+    created = datetime.now().strftime("%Y-%m-%d %H:%M")
+    lines += ["", f"_Sortiert nach E-Mail-Adresse. Erstellt: {created}_"]
+    return "\n".join(lines)
+
+
+def save_memo(content: str, directory: Path = Path("."), timestamp: datetime | None = None) -> Path:
+    ts = timestamp or datetime.now()
+    filename = f"audit_{ts.strftime('%Y%m%d_%H%M')}.md"
+    path = directory / filename
+    path.write_text(content, encoding="utf-8")
+    return path
diff --git a/tests/test_memo.py b/tests/test_memo.py
new file mode 100644
index 0000000..56a61dd
--- /dev/null
+++ b/tests/test_memo.py
@@ -0,0 +1,85 @@
+from datetime import datetime
+from pathlib import Path
+
+import pytest
+
+from teampulse.memo import generate_memo, save_memo
+from teampulse.models import AuditEntry, AuditWindow
+
+
+def make_window(**kwargs):
+    defaults = dict(
+        presenter="Anna Bauer",
+        moderator="Oliver Hofmann",
+        start_time=datetime(2026, 5, 16, 10, 3, 42),
+        end_time=datetime(2026, 5, 16, 10, 47, 15),
+        entries=[
+            AuditEntry("Thomas Wolf", "t.wolf@company.com"),
+            AuditEntry("Klaus Huber", "k.huber@company.com"),
+            AuditEntry("Sandra Vogel", "s.vogel@company.com"),
+        ],
+    )
+    defaults.update(kwargs)
+    return AuditWindow(**defaults)
+
+
+def test_memo_contains_presenter_name():
+    result = generate_memo(make_window())
+    assert "Anna Bauer" in result
+
+
+def test_memo_contains_time_window():
+    result = generate_memo(make_window())
+    assert "10:03:42" in result
+    assert "10:47:15" in result
+
+
+def test_memo_sorts_entries_by_email():
+    result = generate_memo(make_window())
+    idx_huber = result.index("k.huber@company.com")
+    idx_vogel = result.index("s.vogel@company.com")
+    idx_wolf = result.index("t.wolf@company.com")
+    assert idx_huber < idx_vogel < idx_wolf
+
+
+def test_memo_excludes_presenter():
+    window = make_window(
+        entries=[
+            AuditEntry("Anna Bauer", "a.bauer@company.com"),
+            AuditEntry("Klaus Huber", "k.huber@company.com"),
+        ]
+    )
+    result = generate_memo(window)
+    assert "a.bauer@company.com" not in result
+    assert "k.huber@company.com" in result
+
+
+def test_memo_excludes_moderator():
+    window = make_window(
+        entries=[
+            AuditEntry("Oliver Hofmann", "o.hofmann@company.com"),
+            AuditEntry("Klaus Huber", "k.huber@company.com"),
+        ]
+    )
+    result = generate_memo(window)
+    assert "o.hofmann@company.com" not in result
+    assert "k.huber@company.com" in result
+
+
+def test_memo_empty_window():
+    window = make_window(entries=[])
+    result = generate_memo(window)
+    assert "Keine Chat-Aktivität" in result
+
+
+def test_memo_contains_moderator_note():
+    result = generate_memo(make_window())
+    assert "Oliver Hofmann" in result
+
+
+def test_save_memo_writes_file(tmp_path):
+    window = make_window()
+    path = save_memo(generate_memo(window), directory=tmp_path, timestamp=datetime(2026, 5, 16, 10, 51))
+    assert path.exists()
+    assert path.name == "audit_20260516_1051.md"
+    assert "Anna Bauer" in path.read_text()