diff --git a/adapter/telegram/converter.py b/adapter/telegram/converter.py
new file mode 100644
index 0000000..1c00927
--- /dev/null
+++ b/adapter/telegram/converter.py
@@ -0,0 +1,51 @@
+from __future__ import annotations
+
+from aiogram.types import Message
+
+from core.protocol import Attachment, IncomingMessage, OutgoingEvent, OutgoingMessage, OutgoingUI
+
+
+def from_message(message: Message) -> IncomingMessage | None:
+    """Convert aiogram Message to IncomingMessage. Returns None for General topic."""
+    thread_id = message.message_thread_id
+    if thread_id is None:
+        return None
+    return IncomingMessage(
+        user_id=str(message.from_user.id),
+        chat_id=str(thread_id),
+        text=message.text or message.caption or "",
+        attachments=_extract_attachments(message),
+        platform="telegram",
+    )
+
+
+def _extract_attachments(message: Message) -> list[Attachment]:
+    attachments: list[Attachment] = []
+    if message.photo:
+        file = message.photo[-1]
+        attachments.append(Attachment(
+            type="image",
+            url=f"tg://file/{file.file_id}",
+            mime_type="image/jpeg",
+        ))
+    if message.document:
+        attachments.append(Attachment(
+            type="document",
+            url=f"tg://file/{message.document.file_id}",
+            mime_type=message.document.mime_type or "application/octet-stream",
+            filename=message.document.file_name,
+        ))
+    if message.voice:
+        attachments.append(Attachment(
+            type="audio",
+            url=f"tg://file/{message.voice.file_id}",
+            mime_type="audio/ogg",
+        ))
+    return attachments
+
+
+def format_outgoing(event: OutgoingEvent) -> str:
+    """Extract text from an outgoing event for sending to Telegram."""
+    if isinstance(event, (OutgoingMessage, OutgoingUI)):
+        return event.text
+    return str(event)
diff --git a/adapter/telegram/db.py b/adapter/telegram/db.py
new file mode 100644
index 0000000..d9c10aa
--- /dev/null
+++ b/adapter/telegram/db.py
@@ -0,0 +1,102 @@
+from __future__ import annotations
+
+import os
+import sqlite3
+from contextlib import contextmanager
+
+DB_PATH = os.environ.get("DB_PATH", "lambda_bot.db")
+
+
+@contextmanager
+def _conn():
+    con = sqlite3.connect(DB_PATH)
+    con.row_factory = sqlite3.Row
+    try:
+        yield con
+        con.commit()
+    finally:
+        con.close()
+
+
+def init_db() -> None:
+    with _conn() as con:
+        con.executescript("""
+            CREATE TABLE IF NOT EXISTS chats (
+                user_id     INTEGER  NOT NULL,
+                thread_id   INTEGER  NOT NULL,
+                chat_name   TEXT     NOT NULL DEFAULT 'Чат #1',
+                archived_at DATETIME,
+                created_at  DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                PRIMARY KEY (user_id, thread_id)
+            );
+        """)
+
+
+def create_chat(user_id: int, thread_id: int, chat_name: str) -> None:
+    with _conn() as con:
+        con.execute(
+            "INSERT OR IGNORE INTO chats (user_id, thread_id, chat_name) VALUES (?, ?, ?)",
+            (user_id, thread_id, chat_name),
+        )
+
+
+def get_chat(user_id: int, thread_id: int) -> dict | None:
+    with _conn() as con:
+        row = con.execute(
+            "SELECT * FROM chats WHERE user_id = ? AND thread_id = ?",
+            (user_id, thread_id),
+        ).fetchone()
+        return dict(row) if row else None
+
+
+def get_active_chats(user_id: int) -> list[dict]:
+    with _conn() as con:
+        rows = con.execute(
+            "SELECT * FROM chats WHERE user_id = ? AND archived_at IS NULL "
+            "ORDER BY created_at ASC",
+            (user_id,),
+        ).fetchall()
+        return [dict(r) for r in rows]
+
+
+def count_active_chats(user_id: int) -> int:
+    with _conn() as con:
+        row = con.execute(
+            "SELECT COUNT(*) FROM chats WHERE user_id = ? AND archived_at IS NULL",
+            (user_id,),
+        ).fetchone()
+        return row[0]
+
+
+def archive_chat(user_id: int, thread_id: int) -> None:
+    with _conn() as con:
+        con.execute(
+            "UPDATE chats SET archived_at = CURRENT_TIMESTAMP "
+            "WHERE user_id = ? AND thread_id = ?",
+            (user_id, thread_id),
+        )
+
+
+def rename_chat(user_id: int, thread_id: int, new_name: str) -> None:
+    with _conn() as con:
+        con.execute(
+            "UPDATE chats SET chat_name = ? WHERE user_id = ? AND thread_id = ?",
+            (new_name, user_id, thread_id),
+        )
+
+
+def get_display_number(user_id: int, thread_id: int) -> int:
+    """Return 1-based display number for a chat (by creation order)."""
+    with _conn() as con:
+        row = con.execute(
+            """
+            SELECT rn FROM (
+                SELECT thread_id,
+                       ROW_NUMBER() OVER (PARTITION BY user_id ORDER BY created_at) AS rn
+                FROM chats
+                WHERE user_id = ?
+            ) WHERE thread_id = ?
+            """,
+            (user_id, thread_id),
+        ).fetchone()
+        return row[0] if row else 1
diff --git a/tests/adapter/telegram/__init__.py b/tests/adapter/telegram/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/adapter/telegram/test_converter.py b/tests/adapter/telegram/test_converter.py
new file mode 100644
index 0000000..38fd70a
--- /dev/null
+++ b/tests/adapter/telegram/test_converter.py
@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+from types import SimpleNamespace
+
+from adapter.telegram.converter import format_outgoing, from_message
+from core.protocol import OutgoingMessage, OutgoingUI
+
+
+def make_message(*, text="hello", thread_id=42, user_id=1):
+    m = SimpleNamespace()
+    m.text = text
+    m.caption = None
+    m.photo = None
+    m.document = None
+    m.voice = None
+    m.message_thread_id = thread_id
+    m.from_user = SimpleNamespace(id=user_id, full_name="Alice")
+    return m
+
+
+def test_from_message_in_topic():
+    msg = make_message(thread_id=42, user_id=7)
+    result = from_message(msg)
+    assert result is not None
+    assert result.user_id == "7"
+    assert result.chat_id == "42"
+    assert result.text == "hello"
+    assert result.platform == "telegram"
+
+
+def test_from_message_in_general_returns_none():
+    msg = make_message(thread_id=None)
+    assert from_message(msg) is None
+
+
+def test_from_message_uses_caption_if_no_text():
+    msg = make_message(text=None, thread_id=10)
+    msg.caption = "caption text"
+    result = from_message(msg)
+    assert result.text == "caption text"
+
+
+def test_format_outgoing_message():
+    event = OutgoingMessage(chat_id="42", text="response")
+    assert format_outgoing(event) == "response"
+
+
+def test_format_outgoing_ui():
+    event = OutgoingUI(chat_id="42", text="choose")
+    assert format_outgoing(event) == "choose"
diff --git a/tests/adapter/test_forum_db.py b/tests/adapter/test_forum_db.py
new file mode 100644
index 0000000..e69adc4
--- /dev/null
+++ b/tests/adapter/test_forum_db.py
@@ -0,0 +1,80 @@
+from __future__ import annotations
+
+import importlib
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def fresh_db(tmp_path, monkeypatch):
+    monkeypatch.setenv("DB_PATH", str(tmp_path / "test.db"))
+    import adapter.telegram.db as db_mod
+    importlib.reload(db_mod)
+    db_mod.init_db()
+    return db_mod
+
+
+def test_create_and_get_chat(fresh_db):
+    db = fresh_db
+    db.create_chat(user_id=1, thread_id=100, chat_name="Чат #1")
+    chat = db.get_chat(user_id=1, thread_id=100)
+    assert chat is not None
+    assert chat["chat_name"] == "Чат #1"
+    assert chat["archived_at"] is None
+
+
+def test_get_chat_missing(fresh_db):
+    assert fresh_db.get_chat(user_id=1, thread_id=999) is None
+
+
+def test_archive_chat(fresh_db):
+    db = fresh_db
+    db.create_chat(1, 100, "Чат #1")
+    db.archive_chat(1, 100)
+    chat = db.get_chat(1, 100)
+    assert chat["archived_at"] is not None
+
+
+def test_rename_chat(fresh_db):
+    db = fresh_db
+    db.create_chat(1, 100, "Чат #1")
+    db.rename_chat(1, 100, "Новое имя")
+    assert db.get_chat(1, 100)["chat_name"] == "Новое имя"
+
+
+def test_get_active_chats(fresh_db):
+    db = fresh_db
+    db.create_chat(1, 100, "Чат #1")
+    db.create_chat(1, 200, "Чат #2")
+    db.archive_chat(1, 100)
+    chats = db.get_active_chats(1)
+    assert len(chats) == 1
+    assert chats[0]["thread_id"] == 200
+
+
+def test_display_number(fresh_db):
+    db = fresh_db
+    db.create_chat(1, 100, "Чат #1")
+    db.create_chat(1, 200, "Чат #2")
+    db.create_chat(1, 300, "Чат #3")
+    assert db.get_display_number(1, 100) == 1
+    assert db.get_display_number(1, 200) == 2
+    assert db.get_display_number(1, 300) == 3
+
+
+def test_count_active_chats(fresh_db):
+    db = fresh_db
+    db.create_chat(1, 100, "Чат #1")
+    db.create_chat(1, 200, "Чат #2")
+    db.archive_chat(1, 100)
+    assert db.count_active_chats(1) == 1
+
+
+def test_different_users_isolated(fresh_db):
+    db = fresh_db
+    db.create_chat(1, 100, "Чат #1")
+    db.create_chat(2, 100, "Чат #1")  # same thread_id, different user
+    assert db.get_chat(1, 100)["chat_name"] == "Чат #1"
+    assert db.get_chat(2, 100)["chat_name"] == "Чат #1"
+    db.archive_chat(1, 100)
+    assert db.get_chat(1, 100)["archived_at"] is not None
+    assert db.get_chat(2, 100)["archived_at"] is None