diff --git a/conftest.py b/conftest.py
new file mode 100644
index 0000000..60f4b07
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,13 @@
+import sys
+from pathlib import Path
+
+# Insert project root at position 0 so our local `platform/` package
+# shadows the Python stdlib `platform` module.
+root = str(Path(__file__).parent)
+sys.path.insert(0, root)
+
+# If stdlib platform was already cached, remove it so Python re-resolves
+# to our local package.
+stdlib_platform = sys.modules.get("platform")
+if stdlib_platform is not None and not hasattr(stdlib_platform, "mock"):
+    del sys.modules["platform"]
diff --git a/core/auth.py b/core/auth.py
new file mode 100644
index 0000000..688f1cd
--- /dev/null
+++ b/core/auth.py
@@ -0,0 +1,52 @@
+# core/auth.py
+from __future__ import annotations
+
+import structlog
+
+from core.protocol import AuthFlow
+from core.store import StateStore
+
+logger = structlog.get_logger(__name__)
+
+
+def _to_dict(flow: AuthFlow) -> dict:
+    return {
+        "user_id": flow.user_id,
+        "platform": flow.platform,
+        "state": flow.state,
+        "platform_user_id": flow.platform_user_id,
+    }
+
+
+def _from_dict(d: dict) -> AuthFlow:
+    return AuthFlow(
+        user_id=d["user_id"],
+        platform=d["platform"],
+        state=d["state"],
+        platform_user_id=d.get("platform_user_id"),
+    )
+
+
+class AuthManager:
+    def __init__(self, platform: object, store: StateStore) -> None:
+        self._store = store
+
+    async def start_flow(self, user_id: str, platform: str) -> AuthFlow:
+        flow = AuthFlow(user_id=user_id, platform=platform, state="pending")
+        await self._store.set(f"auth:{user_id}", _to_dict(flow))
+        return flow
+
+    async def confirm(self, user_id: str) -> AuthFlow:
+        """В моке — автоматическое подтверждение. В реальном SDK — валидация кода."""
+        stored = await self._store.get(f"auth:{user_id}")
+        if not stored:
+            stored = {"user_id": user_id, "platform": "unknown", "state": "pending", "platform_user_id": None}
+
+        stored["state"] = "confirmed"
+        stored["platform_user_id"] = f"plt_{user_id}"
+        await self._store.set(f"auth:{user_id}", stored)
+        return _from_dict(stored)
+
+    async def is_authenticated(self, user_id: str) -> bool:
+        stored = await self._store.get(f"auth:{user_id}")
+        return stored is not None and stored.get("state") == "confirmed"
diff --git a/core/chat.py b/core/chat.py
new file mode 100644
index 0000000..d05a274
--- /dev/null
+++ b/core/chat.py
@@ -0,0 +1,111 @@
+# core/chat.py
+from __future__ import annotations
+
+from datetime import UTC, datetime
+
+import structlog
+
+from core.protocol import ChatContext
+from core.store import StateStore
+
+logger = structlog.get_logger(__name__)
+
+
+def _to_dict(ctx: ChatContext) -> dict:
+    return {
+        "chat_id": ctx.chat_id,
+        "display_name": ctx.display_name,
+        "platform": ctx.platform,
+        "surface_ref": ctx.surface_ref,
+        "created_at": ctx.created_at.isoformat(),
+        "is_archived": ctx.is_archived,
+    }
+
+
+def _from_dict(d: dict) -> ChatContext:
+    return ChatContext(
+        chat_id=d["chat_id"],
+        display_name=d["display_name"],
+        platform=d["platform"],
+        surface_ref=d["surface_ref"],
+        created_at=datetime.fromisoformat(d["created_at"]),
+        is_archived=d.get("is_archived", False),
+    )
+
+
+class ChatManager:
+    """
+    Управляет метаданными чатов (C1/C2/C3 в workspace пользователя).
+    НЕ управляет lifecycle контейнера — это дело Master'а на стороне платформы.
+    """
+
+    def __init__(self, platform: object, store: StateStore) -> None:
+        self._store = store
+
+    def _key(self, user_id: str, chat_id: str) -> str:
+        return f"chat:{user_id}:{chat_id}"
+
+    async def get_or_create(
+        self,
+        user_id: str,
+        chat_id: str,
+        platform: str,
+        surface_ref: str,
+        name: str | None = None,
+    ) -> ChatContext:
+        key = self._key(user_id, chat_id)
+        stored = await self._store.get(key)
+        if stored:
+            return _from_dict(stored)
+
+        ctx = ChatContext(
+            chat_id=chat_id,
+            display_name=name or f"Чат {chat_id}",
+            platform=platform,
+            surface_ref=surface_ref,
+            created_at=datetime.now(UTC),
+        )
+        await self._store.set(key, _to_dict(ctx))
+        logger.info("Chat created", chat_id=chat_id, user_id=user_id)
+        return ctx
+
+    async def get(self, chat_id: str, user_id: str | None = None) -> ChatContext | None:
+        if user_id:
+            stored = await self._store.get(self._key(user_id, chat_id))
+            return _from_dict(stored) if stored else None
+        # Scan by chat_id suffix when user_id unknown (slower)
+        for key in await self._store.keys("chat:"):
+            if key.endswith(f":{chat_id}"):
+                stored = await self._store.get(key)
+                if stored:
+                    return _from_dict(stored)
+        return None
+
+    async def rename(self, chat_id: str, name: str, user_id: str | None = None) -> ChatContext:
+        ctx = await self.get(chat_id, user_id)
+        if not ctx:
+            raise ValueError(f"Chat {chat_id} not found")
+        ctx.display_name = name
+        for key in await self._store.keys("chat:"):
+            if key.endswith(f":{chat_id}"):
+                await self._store.set(key, _to_dict(ctx))
+                break
+        return ctx
+
+    async def archive(self, chat_id: str, user_id: str | None = None) -> None:
+        ctx = await self.get(chat_id, user_id)
+        if not ctx:
+            raise ValueError(f"Chat {chat_id} not found")
+        ctx.is_archived = True
+        for key in await self._store.keys("chat:"):
+            if key.endswith(f":{chat_id}"):
+                await self._store.set(key, _to_dict(ctx))
+                break
+
+    async def list_active(self, user_id: str) -> list[ChatContext]:
+        chats = []
+        for key in await self._store.keys(f"chat:{user_id}:"):
+            stored = await self._store.get(key)
+            if stored and not stored.get("is_archived"):
+                chats.append(_from_dict(stored))
+        return chats
diff --git a/core/handler.py b/core/handler.py
new file mode 100644
index 0000000..f6dd5bd
--- /dev/null
+++ b/core/handler.py
@@ -0,0 +1,71 @@
+# core/handler.py
+from __future__ import annotations
+
+from typing import Awaitable, Callable
+
+import structlog
+
+from core.auth import AuthManager
+from core.chat import ChatManager
+from core.protocol import (
+    IncomingCallback,
+    IncomingCommand,
+    IncomingEvent,
+    IncomingMessage,
+    OutgoingEvent,
+)
+from core.settings import SettingsManager
+from platform.interface import PlatformClient
+
+logger = structlog.get_logger(__name__)
+
+HandlerFn = Callable[..., Awaitable[list[OutgoingEvent]]]
+
+
+class EventDispatcher:
+    def __init__(
+        self,
+        platform: PlatformClient,
+        chat_mgr: ChatManager,
+        auth_mgr: AuthManager,
+        settings_mgr: SettingsManager,
+    ) -> None:
+        self._platform = platform
+        self._chat_mgr = chat_mgr
+        self._auth_mgr = auth_mgr
+        self._settings_mgr = settings_mgr
+        self._handlers: dict[type, dict[str, HandlerFn]] = {
+            IncomingCommand: {},
+            IncomingMessage: {},
+            IncomingCallback: {},
+        }
+
+    def register(self, event_type: type, key: str, handler: HandlerFn) -> None:
+        self._handlers[event_type][key] = handler
+
+    async def dispatch(self, event: IncomingEvent) -> list[OutgoingEvent]:
+        event_type = type(event)
+        handlers = self._handlers.get(event_type, {})
+        key = self._routing_key(event)
+        handler = handlers.get(key) or handlers.get("*")
+
+        if handler is None:
+            logger.warning("No handler registered", event_type=event_type.__name__, key=key)
+            return []
+
+        return await handler(
+            event=event,
+            chat_mgr=self._chat_mgr,
+            auth_mgr=self._auth_mgr,
+            settings_mgr=self._settings_mgr,
+            platform=self._platform,
+        )
+
+    def _routing_key(self, event: IncomingEvent) -> str:
+        if isinstance(event, IncomingCommand):
+            return event.command
+        if isinstance(event, IncomingCallback):
+            return event.action
+        if isinstance(event, IncomingMessage) and event.attachments:
+            return event.attachments[0].type
+        return "*"
diff --git a/core/handlers/__init__.py b/core/handlers/__init__.py
new file mode 100644
index 0000000..9ed15d9
--- /dev/null
+++ b/core/handlers/__init__.py
@@ -0,0 +1,24 @@
+# core/handlers/__init__.py
+from __future__ import annotations
+
+from core.handler import EventDispatcher
+from core.protocol import IncomingCallback, IncomingCommand, IncomingMessage
+from core.handlers import callback, chat, message, settings, start
+
+
+def register_all(dispatcher: EventDispatcher) -> None:
+    # Commands
+    dispatcher.register(IncomingCommand, "start",    start.handle_start)
+    dispatcher.register(IncomingCommand, "new",      chat.handle_new_chat)
+    dispatcher.register(IncomingCommand, "rename",   chat.handle_rename)
+    dispatcher.register(IncomingCommand, "archive",  chat.handle_archive)
+    dispatcher.register(IncomingCommand, "chats",    chat.handle_list_chats)
+    dispatcher.register(IncomingCommand, "settings", settings.handle_settings)
+
+    # Messages — catch-all (audio falls back here until voice_handler registered)
+    dispatcher.register(IncomingMessage, "*", message.handle_message)
+
+    # Callbacks
+    dispatcher.register(IncomingCallback, "confirm",      callback.handle_confirm)
+    dispatcher.register(IncomingCallback, "cancel",       callback.handle_cancel)
+    dispatcher.register(IncomingCallback, "toggle_skill", callback.handle_toggle_skill)
diff --git a/core/handlers/callback.py b/core/handlers/callback.py
new file mode 100644
index 0000000..28b7659
--- /dev/null
+++ b/core/handlers/callback.py
@@ -0,0 +1,25 @@
+# core/handlers/callback.py
+from __future__ import annotations
+
+from core.protocol import IncomingCallback, OutgoingMessage, SettingsAction
+
+
+async def handle_confirm(event: IncomingCallback, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    action_id = event.payload.get("action_id", "unknown")
+    return [OutgoingMessage(chat_id=event.chat_id, text=f"Действие подтверждено (id: {action_id}).")]
+
+
+async def handle_cancel(event: IncomingCallback, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    action_id = event.payload.get("action_id", "unknown")
+    return [OutgoingMessage(chat_id=event.chat_id, text=f"Действие отменено (id: {action_id}).")]
+
+
+async def handle_toggle_skill(event: IncomingCallback, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    skill = event.payload.get("skill")
+    enabled = event.payload.get("enabled", True)
+    if not skill:
+        return [OutgoingMessage(chat_id=event.chat_id, text="Ошибка: не указан навык.")]
+    action = SettingsAction(action="toggle_skill", payload={"skill": skill, "enabled": enabled})
+    await settings_mgr.apply(event.user_id, action)
+    state = "включён" if enabled else "выключен"
+    return [OutgoingMessage(chat_id=event.chat_id, text=f"Навык {skill} {state}.")]
diff --git a/core/handlers/chat.py b/core/handlers/chat.py
new file mode 100644
index 0000000..8e32468
--- /dev/null
+++ b/core/handlers/chat.py
@@ -0,0 +1,38 @@
+# core/handlers/chat.py
+from __future__ import annotations
+
+from core.protocol import IncomingCommand, OutgoingMessage
+
+
+async def handle_new_chat(event: IncomingCommand, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    if not await auth_mgr.is_authenticated(event.user_id):
+        return [OutgoingMessage(chat_id=event.chat_id, text="Введите /start чтобы начать.")]
+    name = " ".join(event.args) if event.args else None
+    ctx = await chat_mgr.get_or_create(
+        user_id=event.user_id,
+        chat_id=event.chat_id,
+        platform=event.platform,
+        surface_ref=event.chat_id,
+        name=name,
+    )
+    return [OutgoingMessage(chat_id=event.chat_id, text=f"Создан чат: {ctx.display_name}")]
+
+
+async def handle_rename(event: IncomingCommand, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    if not event.args:
+        return [OutgoingMessage(chat_id=event.chat_id, text="Укажите название: /rename Название")]
+    ctx = await chat_mgr.rename(event.chat_id, " ".join(event.args))
+    return [OutgoingMessage(chat_id=event.chat_id, text=f"Переименован в: {ctx.display_name}")]
+
+
+async def handle_archive(event: IncomingCommand, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    await chat_mgr.archive(event.chat_id)
+    return [OutgoingMessage(chat_id=event.chat_id, text="Чат архивирован.")]
+
+
+async def handle_list_chats(event: IncomingCommand, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    chats = await chat_mgr.list_active(event.user_id)
+    if not chats:
+        return [OutgoingMessage(chat_id=event.chat_id, text="Нет активных чатов.")]
+    lines = [f"• {c.display_name} ({c.chat_id})" for c in chats]
+    return [OutgoingMessage(chat_id=event.chat_id, text="\n".join(lines))]
diff --git a/core/handlers/message.py b/core/handlers/message.py
new file mode 100644
index 0000000..e1475ef
--- /dev/null
+++ b/core/handlers/message.py
@@ -0,0 +1,29 @@
+# core/handlers/message.py
+from __future__ import annotations
+
+from core.protocol import IncomingMessage, OutgoingMessage, OutgoingTyping
+
+
+async def handle_message(event: IncomingMessage, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    if not await auth_mgr.is_authenticated(event.user_id):
+        return [OutgoingMessage(chat_id=event.chat_id, text="Введите /start чтобы начать.")]
+
+    # Voice slot fallback: audio attachment without registered voice_handler
+    if event.attachments and event.attachments[0].type == "audio":
+        return [OutgoingMessage(
+            chat_id=event.chat_id,
+            text="Голосовые сообщения скоро поддержим.",
+            parse_mode="plain",
+        )]
+
+    response = await platform.send_message(
+        user_id=event.user_id,
+        chat_id=event.chat_id,
+        text=event.text,
+        attachments=[],
+    )
+
+    return [
+        OutgoingTyping(chat_id=event.chat_id, is_typing=False),
+        OutgoingMessage(chat_id=event.chat_id, text=response.response, parse_mode="markdown"),
+    ]
diff --git a/core/handlers/settings.py b/core/handlers/settings.py
new file mode 100644
index 0000000..b1fae5d
--- /dev/null
+++ b/core/handlers/settings.py
@@ -0,0 +1,25 @@
+# core/handlers/settings.py
+from __future__ import annotations
+
+from core.protocol import IncomingCommand, OutgoingMessage, OutgoingUI, UIButton
+
+
+async def handle_settings(event: IncomingCommand, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    return [OutgoingUI(
+        chat_id=event.chat_id,
+        text="⚙️ Настройки",
+        buttons=[
+            UIButton(label="🔗 Коннекторы",    action="settings_connectors", style="secondary"),
+            UIButton(label="🧩 Скиллы",        action="settings_skills",     style="secondary"),
+            UIButton(label="🧠 Личность",      action="settings_soul",       style="secondary"),
+            UIButton(label="🔒 Безопасность",  action="settings_safety",     style="secondary"),
+            UIButton(label="💳 Подписка",      action="settings_plan",       style="secondary"),
+        ],
+    )]
+
+
+async def handle_settings_skills(event: IncomingCommand, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    s = await settings_mgr.get(event.user_id)
+    lines = [("✅" if on else "❌") + f" {name}" for name, on in s.skills.items()]
+    text = "🧩 Скиллы\n\n" + ("\n".join(lines) or "Нет доступных скиллов")
+    return [OutgoingMessage(chat_id=event.chat_id, text=text)]
diff --git a/core/handlers/start.py b/core/handlers/start.py
new file mode 100644
index 0000000..578c899
--- /dev/null
+++ b/core/handlers/start.py
@@ -0,0 +1,16 @@
+# core/handlers/start.py
+from __future__ import annotations
+
+from core.protocol import IncomingCommand, OutgoingMessage
+
+
+async def handle_start(event: IncomingCommand, auth_mgr, platform, chat_mgr, settings_mgr) -> list:
+    user = await platform.get_or_create_user(event.user_id, event.platform)
+    await auth_mgr.confirm(event.user_id)
+    name = user.display_name or event.user_id
+    text = (
+        f"Добро пожаловать, {name}! Я агент Lambda. Напишите что-нибудь чтобы начать."
+        if user.is_new
+        else f"С возвращением, {name}!"
+    )
+    return [OutgoingMessage(chat_id=event.chat_id, text=text)]
diff --git a/core/protocol.py b/core/protocol.py
new file mode 100644
index 0000000..02a9f4a
--- /dev/null
+++ b/core/protocol.py
@@ -0,0 +1,124 @@
+# core/protocol.py
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from datetime import datetime
+
+
+@dataclass
+class Attachment:
+    type: str  # "image" | "document" | "audio" | "video"
+    url: str | None = None
+    content: bytes | None = None
+    filename: str | None = None
+    mime_type: str | None = None
+
+
+@dataclass
+class IncomingMessage:
+    user_id: str
+    platform: str
+    chat_id: str
+    text: str
+    attachments: list[Attachment] = field(default_factory=list)
+    reply_to: str | None = None
+
+
+@dataclass
+class IncomingCommand:
+    user_id: str
+    platform: str
+    chat_id: str
+    command: str
+    args: list[str] = field(default_factory=list)
+
+
+@dataclass
+class IncomingCallback:
+    user_id: str
+    platform: str
+    chat_id: str
+    action: str
+    payload: dict = field(default_factory=dict)
+
+
+@dataclass
+class OutgoingMessage:
+    chat_id: str
+    text: str
+    parse_mode: str = "plain"
+    attachments: list[Attachment] = field(default_factory=list)
+    reply_to: str | None = None
+
+
+@dataclass
+class UIButton:
+    label: str
+    action: str
+    payload: dict = field(default_factory=dict)
+    style: str = "secondary"  # "primary" | "danger" | "secondary"
+
+
+@dataclass
+class OutgoingUI:
+    chat_id: str
+    text: str
+    buttons: list[UIButton] = field(default_factory=list)
+
+
+@dataclass
+class OutgoingNotification:
+    chat_id: str
+    text: str
+    level: str = "info"  # "info" | "warning" | "success" | "error"
+
+
+@dataclass
+class OutgoingTyping:
+    chat_id: str
+    is_typing: bool
+
+
+@dataclass
+class ChatContext:
+    chat_id: str
+    display_name: str
+    platform: str
+    surface_ref: str
+    created_at: datetime
+    is_archived: bool = False
+
+
+@dataclass
+class AuthFlow:
+    user_id: str
+    platform: str
+    state: str  # "pending" | "code_sent" | "confirmed" | "failed"
+    platform_user_id: str | None = None
+
+
+@dataclass
+class ConfirmationRequest:
+    action_id: str
+    chat_id: str
+    description: str
+    risk_level: str  # "low" | "medium" | "high"
+    expires_at: datetime
+
+
+@dataclass
+class SettingsAction:
+    action: str
+    payload: dict = field(default_factory=dict)
+
+
+@dataclass
+class PaymentRequired:
+    user_id: str
+    reason: str
+    current_plan: str
+
+
+# Type aliases
+IncomingEvent = IncomingMessage | IncomingCommand | IncomingCallback
+OutgoingEvent = OutgoingMessage | OutgoingUI | OutgoingNotification | OutgoingTyping
diff --git a/core/settings.py b/core/settings.py
new file mode 100644
index 0000000..ba72a89
--- /dev/null
+++ b/core/settings.py
@@ -0,0 +1,29 @@
+# core/settings.py
+from __future__ import annotations
+
+import structlog
+
+from core.protocol import SettingsAction
+from core.store import StateStore
+from platform.interface import PlatformClient, UserSettings
+
+logger = structlog.get_logger(__name__)
+
+
+class SettingsManager:
+    def __init__(self, platform: PlatformClient, store: StateStore) -> None:
+        self._platform = platform
+        self._store = store
+
+    async def get(self, user_id: str) -> UserSettings:
+        cached = await self._store.get(f"settings:{user_id}")
+        if cached:
+            return UserSettings(**cached)
+        settings = await self._platform.get_settings(user_id)
+        await self._store.set(f"settings:{user_id}", settings.model_dump())
+        return settings
+
+    async def apply(self, user_id: str, action: SettingsAction) -> None:
+        await self._platform.update_settings(user_id, action)
+        await self._store.delete(f"settings:{user_id}")  # invalidate cache
+        logger.info("Settings applied", user_id=user_id, action=action.action)
diff --git a/core/store.py b/core/store.py
new file mode 100644
index 0000000..c1402bc
--- /dev/null
+++ b/core/store.py
@@ -0,0 +1,73 @@
+# core/store.py
+from __future__ import annotations
+
+import json
+import sqlite3
+from typing import Protocol
+
+
+class StateStore(Protocol):
+    async def get(self, key: str) -> dict | None: ...
+    async def set(self, key: str, value: dict) -> None: ...
+    async def delete(self, key: str) -> None: ...
+    async def keys(self, prefix: str) -> list[str]: ...
+
+
+class InMemoryStore:
+    def __init__(self) -> None:
+        self._data: dict[str, dict] = {}
+
+    async def get(self, key: str) -> dict | None:
+        return self._data.get(key)
+
+    async def set(self, key: str, value: dict) -> None:
+        self._data[key] = value
+
+    async def delete(self, key: str) -> None:
+        self._data.pop(key, None)
+
+    async def keys(self, prefix: str) -> list[str]:
+        return [k for k in self._data if k.startswith(prefix)]
+
+
+class SQLiteStore:
+    def __init__(self, db_path: str) -> None:
+        self._db_path = db_path
+        self._init_db()
+
+    def _init_db(self) -> None:
+        conn = sqlite3.connect(self._db_path)
+        conn.execute(
+            "CREATE TABLE IF NOT EXISTS kv (key TEXT PRIMARY KEY, value TEXT NOT NULL)"
+        )
+        conn.commit()
+        conn.close()
+
+    async def get(self, key: str) -> dict | None:
+        conn = sqlite3.connect(self._db_path)
+        row = conn.execute("SELECT value FROM kv WHERE key = ?", (key,)).fetchone()
+        conn.close()
+        return json.loads(row[0]) if row else None
+
+    async def set(self, key: str, value: dict) -> None:
+        conn = sqlite3.connect(self._db_path)
+        conn.execute(
+            "INSERT OR REPLACE INTO kv (key, value) VALUES (?, ?)",
+            (key, json.dumps(value, default=str)),
+        )
+        conn.commit()
+        conn.close()
+
+    async def delete(self, key: str) -> None:
+        conn = sqlite3.connect(self._db_path)
+        conn.execute("DELETE FROM kv WHERE key = ?", (key,))
+        conn.commit()
+        conn.close()
+
+    async def keys(self, prefix: str) -> list[str]:
+        conn = sqlite3.connect(self._db_path)
+        rows = conn.execute(
+            "SELECT key FROM kv WHERE key LIKE ?", (prefix + "%",)
+        ).fetchall()
+        conn.close()
+        return [row[0] for row in rows]
diff --git a/docs/api-contract.md b/docs/api-contract.md
index 7e7f962..10fd899 100644
--- a/docs/api-contract.md
+++ b/docs/api-contract.md
@@ -135,11 +135,9 @@ Master решает: нужен ли новый контейнер, или ра
 
 ---
 
-## Открытые вопросы к Азамату (SDK)
+## Открытые вопросы к команде платфрмы (SDK)
 
 - [ ] Точный формат эндпоинта отправки сообщения — URL, поля
 - [ ] Как передавать вложения (файлы, изображения)? Через S3 pre-signed URL или напрямую?
 - [ ] Стриминговый ответ (SSE / WebSocket) или только sync?
-- [ ] Как обрабатывается `chat_id` на стороне платформы — это имя директории (C1/C2) или наш произвольный идентификатор?
-- [ ] Есть ли endpoint для получения истории чата или она хранится только в `history.db` внутри контейнера?
 - [ ] Формат `SettingsAction` — совпадает с нашим или другой?
diff --git a/platform/__init__.py b/platform/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/platform/interface.py b/platform/interface.py
new file mode 100644
index 0000000..95d56c6
--- /dev/null
+++ b/platform/interface.py
@@ -0,0 +1,59 @@
+# platform/interface.py
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any, Protocol
+
+from pydantic import BaseModel
+
+
+class User(BaseModel):
+    user_id: str
+    external_id: str
+    platform: str
+    display_name: str | None = None
+    created_at: datetime
+    is_new: bool = False
+
+
+class MessageResponse(BaseModel):
+    message_id: str
+    response: str
+    tokens_used: int
+    finished: bool
+
+
+class UserSettings(BaseModel):
+    skills: dict[str, bool] = {}
+    connectors: dict[str, dict] = {}
+    soul: dict[str, str] = {}
+    safety: dict[str, bool] = {}
+    plan: dict[str, Any] = {}
+
+
+class PlatformError(Exception):
+    def __init__(self, message: str, code: str = "PLATFORM_ERROR"):
+        super().__init__(message)
+        self.code = code
+
+
+class PlatformClient(Protocol):
+    async def get_or_create_user(
+        self,
+        external_id: str,
+        platform: str,
+        display_name: str | None = None,
+    ) -> User: ...
+
+    # Master manages container lifecycle — bot only sends user_id + chat_id.
+    async def send_message(
+        self,
+        user_id: str,
+        chat_id: str,
+        text: str,
+        attachments: list | None = None,
+    ) -> MessageResponse: ...
+
+    async def get_settings(self, user_id: str) -> UserSettings: ...
+
+    async def update_settings(self, user_id: str, action: Any) -> None: ...
diff --git a/platform/mock.py b/platform/mock.py
new file mode 100644
index 0000000..96326d7
--- /dev/null
+++ b/platform/mock.py
@@ -0,0 +1,137 @@
+# platform/mock.py
+from __future__ import annotations
+
+import asyncio
+import random
+import uuid
+from datetime import UTC, datetime
+from typing import Any
+
+import structlog
+
+from platform.interface import MessageResponse, User, UserSettings
+
+logger = structlog.get_logger(__name__)
+
+
+class MockPlatformClient:
+    """
+    Заглушка SDK платформы Lambda.
+
+    Реализует PlatformClient Protocol. При подключении реального SDK
+    заменяется только этот файл — core/ и адаптеры не трогаются.
+
+    Ключевое отличие от реальной платформы: не управляет lifecycle контейнера.
+    Master делает это сам при получении send_message.
+    """
+
+    def __init__(self) -> None:
+        self._users: dict[str, dict] = {}
+        self._messages: dict[str, list] = {}  # "{user_id}:{chat_id}" → messages
+        self._settings: dict[str, dict] = {}
+        logger.info("MockPlatformClient initialized")
+
+    async def get_or_create_user(
+        self,
+        external_id: str,
+        platform: str,
+        display_name: str | None = None,
+    ) -> User:
+        await self._latency()
+        key = f"{platform}:{external_id}"
+        is_new = key not in self._users
+        if is_new:
+            self._users[key] = {
+                "user_id": f"usr-{platform}-{external_id}",
+                "external_id": external_id,
+                "platform": platform,
+                "display_name": display_name,
+                "created_at": "2025-01-01T00:00:00Z",
+                "is_new": True,
+            }
+        data = {**self._users[key], "is_new": is_new}
+        return User(**data)
+
+    async def send_message(
+        self,
+        user_id: str,
+        chat_id: str,
+        text: str,
+        attachments: list | None = None,
+    ) -> MessageResponse:
+        await self._latency(200, 600)
+        key = f"{user_id}:{chat_id}"
+        if key not in self._messages:
+            self._messages[key] = []
+
+        message_id = str(uuid.uuid4())
+        preview = text[:50] + ("..." if len(text) > 50 else "")
+        response = f"[MOCK] Ответ на: «{preview}»"
+
+        self._messages[key].append({
+            "message_id": message_id,
+            "user_text": text,
+            "response": response,
+            "tokens_used": len(text.split()) * 2,
+            "finished": True,
+            "created_at": datetime.now(UTC).isoformat(),
+        })
+
+        logger.info("Message sent", user_id=user_id, chat_id=chat_id, message_id=message_id)
+        return MessageResponse(
+            message_id=message_id,
+            response=response,
+            tokens_used=len(text.split()) * 2,
+            finished=True,
+        )
+
+    async def get_settings(self, user_id: str) -> UserSettings:
+        await self._latency()
+        stored = self._settings.get(user_id, {})
+        return UserSettings(
+            skills=stored.get("skills", {
+                "web-search": True,
+                "fetch-url": True,
+                "email": False,
+                "browser": False,
+                "image-gen": False,
+                "files": True,
+            }),
+            connectors=stored.get("connectors", {}),
+            soul=stored.get("soul", {"name": "Лямбда", "style": "friendly"}),
+            safety=stored.get("safety", {
+                "email-send": True,
+                "file-delete": True,
+                "social-post": True,
+            }),
+            plan=stored.get("plan", {
+                "name": "Beta",
+                "tokens_used": 0,
+                "tokens_limit": 1000,
+            }),
+        )
+
+    async def update_settings(self, user_id: str, action: Any) -> None:
+        await self._latency()
+        settings = self._settings.setdefault(user_id, {})
+
+        if action.action == "toggle_skill":
+            skills = settings.setdefault("skills", {})
+            skills[action.payload["skill"]] = action.payload.get("enabled", True)
+        elif action.action == "set_soul":
+            soul = settings.setdefault("soul", {})
+            soul[action.payload["field"]] = action.payload["value"]
+        elif action.action == "set_safety":
+            safety = settings.setdefault("safety", {})
+            safety[action.payload["trigger"]] = action.payload.get("enabled", True)
+
+        logger.info("Settings updated", user_id=user_id, action=action.action)
+
+    def get_stats(self) -> dict:
+        return {
+            "total_users": len(self._users),
+            "total_messages": sum(len(msgs) for msgs in self._messages.values()),
+        }
+
+    async def _latency(self, min_ms: int = 10, max_ms: int = 80) -> None:
+        await asyncio.sleep(random.randint(min_ms, max_ms) / 1000)
diff --git a/pyproject.toml b/pyproject.toml
index cbcf1f0..8f4978b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,6 +29,7 @@ dev = [
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
 testpaths = ["tests"]
+pythonpath = ["."]
 
 [tool.ruff]
 line-length = 100
diff --git a/tests/core/test_auth.py b/tests/core/test_auth.py
new file mode 100644
index 0000000..9c02e7a
--- /dev/null
+++ b/tests/core/test_auth.py
@@ -0,0 +1,38 @@
+# tests/core/test_auth.py
+import pytest
+from core.auth import AuthManager
+from core.store import InMemoryStore
+from platform.mock import MockPlatformClient
+
+
+@pytest.fixture
+def mgr():
+    return AuthManager(MockPlatformClient(), InMemoryStore())
+
+
+async def test_not_authenticated_initially(mgr):
+    assert await mgr.is_authenticated("u1") is False
+
+
+async def test_start_flow_returns_pending(mgr):
+    flow = await mgr.start_flow("u1", "telegram")
+    assert flow.state == "pending"
+    assert flow.user_id == "u1"
+
+
+async def test_confirm_sets_confirmed(mgr):
+    await mgr.start_flow("u1", "telegram")
+    flow = await mgr.confirm("u1")
+    assert flow.state == "confirmed"
+
+
+async def test_is_authenticated_after_confirm(mgr):
+    await mgr.start_flow("u1", "telegram")
+    await mgr.confirm("u1")
+    assert await mgr.is_authenticated("u1") is True
+
+
+async def test_confirm_without_start_flow(mgr):
+    flow = await mgr.confirm("new_user")
+    assert flow.state == "confirmed"
+    assert await mgr.is_authenticated("new_user") is True
diff --git a/tests/core/test_chat.py b/tests/core/test_chat.py
new file mode 100644
index 0000000..83d2252
--- /dev/null
+++ b/tests/core/test_chat.py
@@ -0,0 +1,53 @@
+# tests/core/test_chat.py
+import pytest
+from core.chat import ChatManager
+from core.store import InMemoryStore
+from platform.mock import MockPlatformClient
+
+
+@pytest.fixture
+def mgr():
+    return ChatManager(MockPlatformClient(), InMemoryStore())
+
+
+async def test_get_or_create_new_chat(mgr):
+    ctx = await mgr.get_or_create("u1", "C1", "telegram", "topic-123")
+    assert ctx.chat_id == "C1"
+    assert ctx.platform == "telegram"
+    assert ctx.is_archived is False
+
+
+async def test_get_or_create_idempotent(mgr):
+    c1 = await mgr.get_or_create("u1", "C1", "telegram", "t1")
+    c2 = await mgr.get_or_create("u1", "C1", "telegram", "t1")
+    assert c1.chat_id == c2.chat_id
+    assert c1.display_name == c2.display_name
+
+
+async def test_get_or_create_with_custom_name(mgr):
+    ctx = await mgr.get_or_create("u1", "C1", "telegram", "t1", name="Анализ рынка")
+    assert ctx.display_name == "Анализ рынка"
+
+
+async def test_rename_chat(mgr):
+    await mgr.get_or_create("u1", "C1", "telegram", "t1")
+    ctx = await mgr.rename("C1", "Новое название")
+    assert ctx.display_name == "Новое название"
+
+
+async def test_archive_chat(mgr):
+    await mgr.get_or_create("u1", "C1", "telegram", "t1")
+    await mgr.archive("C1")
+    ctx = await mgr.get("C1")
+    assert ctx is not None
+    assert ctx.is_archived is True
+
+
+async def test_list_active_excludes_archived(mgr):
+    await mgr.get_or_create("u1", "C1", "telegram", "t1")
+    await mgr.get_or_create("u1", "C2", "telegram", "t2")
+    await mgr.archive("C2")
+    chats = await mgr.list_active("u1")
+    ids = [c.chat_id for c in chats]
+    assert "C1" in ids
+    assert "C2" not in ids
diff --git a/tests/core/test_dispatcher.py b/tests/core/test_dispatcher.py
new file mode 100644
index 0000000..08309dc
--- /dev/null
+++ b/tests/core/test_dispatcher.py
@@ -0,0 +1,85 @@
+# tests/core/test_dispatcher.py
+import pytest
+from core.handler import EventDispatcher
+from core.protocol import (
+    IncomingCommand, IncomingMessage, IncomingCallback,
+    OutgoingMessage, Attachment,
+)
+from core.chat import ChatManager
+from core.auth import AuthManager
+from core.settings import SettingsManager
+from core.store import InMemoryStore
+from platform.mock import MockPlatformClient
+
+
+@pytest.fixture
+def dispatcher():
+    platform = MockPlatformClient()
+    store = InMemoryStore()
+    return EventDispatcher(
+        platform=platform,
+        chat_mgr=ChatManager(platform, store),
+        auth_mgr=AuthManager(platform, store),
+        settings_mgr=SettingsManager(platform, store),
+    )
+
+
+async def test_dispatch_command_to_handler(dispatcher):
+    called_with = {}
+
+    async def my_handler(event, **kwargs):
+        called_with["event"] = event
+        return [OutgoingMessage(chat_id=event.chat_id, text="ok")]
+
+    dispatcher.register(IncomingCommand, "ping", my_handler)
+    cmd = IncomingCommand(user_id="u1", platform="telegram", chat_id="C1", command="ping")
+    result = await dispatcher.dispatch(cmd)
+
+    assert called_with["event"] is cmd
+    assert result[0].text == "ok"
+
+
+async def test_dispatch_unknown_command_returns_empty(dispatcher):
+    cmd = IncomingCommand(user_id="u1", platform="telegram", chat_id="C1", command="unknown")
+    result = await dispatcher.dispatch(cmd)
+    assert result == []
+
+
+async def test_dispatch_message_to_catchall(dispatcher):
+    async def catch_all(event, **kwargs):
+        return [OutgoingMessage(chat_id=event.chat_id, text="caught")]
+
+    dispatcher.register(IncomingMessage, "*", catch_all)
+    msg = IncomingMessage(user_id="u1", platform="telegram", chat_id="C1", text="hello")
+    result = await dispatcher.dispatch(msg)
+    assert result[0].text == "caught"
+
+
+async def test_dispatch_routes_audio_before_catchall(dispatcher):
+    async def audio_handler(event, **kwargs):
+        return [OutgoingMessage(chat_id=event.chat_id, text="audio")]
+
+    async def catch_all(event, **kwargs):
+        return [OutgoingMessage(chat_id=event.chat_id, text="text")]
+
+    dispatcher.register(IncomingMessage, "audio", audio_handler)
+    dispatcher.register(IncomingMessage, "*", catch_all)
+
+    audio_msg = IncomingMessage(
+        user_id="u1", platform="telegram", chat_id="C1", text="",
+        attachments=[Attachment(type="audio")],
+    )
+    text_msg = IncomingMessage(user_id="u1", platform="telegram", chat_id="C1", text="hi")
+
+    assert (await dispatcher.dispatch(audio_msg))[0].text == "audio"
+    assert (await dispatcher.dispatch(text_msg))[0].text == "text"
+
+
+async def test_dispatch_callback_by_action(dispatcher):
+    async def confirm_handler(event, **kwargs):
+        return [OutgoingMessage(chat_id=event.chat_id, text="confirmed")]
+
+    dispatcher.register(IncomingCallback, "confirm", confirm_handler)
+    cb = IncomingCallback(user_id="u1", platform="telegram", chat_id="C1", action="confirm")
+    result = await dispatcher.dispatch(cb)
+    assert result[0].text == "confirmed"
diff --git a/tests/core/test_integration.py b/tests/core/test_integration.py
new file mode 100644
index 0000000..40eb1f5
--- /dev/null
+++ b/tests/core/test_integration.py
@@ -0,0 +1,85 @@
+# tests/core/test_integration.py
+"""
+Smoke test: полный цикл через dispatcher + реальные managers + MockPlatformClient.
+Имитирует что делает адаптер (Telegram или Matrix) при получении события.
+"""
+import pytest
+from platform.mock import MockPlatformClient
+from core.store import InMemoryStore
+from core.chat import ChatManager
+from core.auth import AuthManager
+from core.settings import SettingsManager
+from core.handler import EventDispatcher
+from core.handlers import register_all
+from core.protocol import (
+    IncomingCommand, IncomingMessage, IncomingCallback,
+    OutgoingMessage, OutgoingUI,
+    Attachment, SettingsAction,
+)
+
+
+@pytest.fixture
+def dispatcher():
+    platform = MockPlatformClient()
+    store = InMemoryStore()
+    d = EventDispatcher(
+        platform=platform,
+        chat_mgr=ChatManager(platform, store),
+        auth_mgr=AuthManager(platform, store),
+        settings_mgr=SettingsManager(platform, store),
+    )
+    register_all(d)
+    return d
+
+
+async def test_full_flow_start_then_message(dispatcher):
+    start = IncomingCommand(user_id="tg_123", platform="telegram", chat_id="C1", command="start")
+    result = await dispatcher.dispatch(start)
+    assert any(isinstance(r, OutgoingMessage) for r in result)
+
+    msg = IncomingMessage(user_id="tg_123", platform="telegram", chat_id="C1", text="Привет!")
+    result = await dispatcher.dispatch(msg)
+    texts = [r.text for r in result if isinstance(r, OutgoingMessage)]
+    assert any("[MOCK]" in t for t in texts)
+
+
+async def test_new_chat_command(dispatcher):
+    start = IncomingCommand(user_id="u1", platform="matrix", chat_id="C1", command="start")
+    await dispatcher.dispatch(start)
+
+    new = IncomingCommand(user_id="u1", platform="matrix", chat_id="C2", command="new", args=["Анализ"])
+    result = await dispatcher.dispatch(new)
+    assert any("Анализ" in r.text for r in result if isinstance(r, OutgoingMessage))
+
+
+async def test_settings_menu(dispatcher):
+    start = IncomingCommand(user_id="u1", platform="telegram", chat_id="C1", command="start")
+    await dispatcher.dispatch(start)
+
+    s = IncomingCommand(user_id="u1", platform="telegram", chat_id="C1", command="settings")
+    result = await dispatcher.dispatch(s)
+    assert any(isinstance(r, OutgoingUI) for r in result)
+
+
+async def test_voice_message_fallback(dispatcher):
+    start = IncomingCommand(user_id="u1", platform="telegram", chat_id="C1", command="start")
+    await dispatcher.dispatch(start)
+
+    voice = IncomingMessage(
+        user_id="u1", platform="telegram", chat_id="C1", text="",
+        attachments=[Attachment(type="audio")],
+    )
+    result = await dispatcher.dispatch(voice)
+    assert any("голосов" in r.text.lower() for r in result if isinstance(r, OutgoingMessage))
+
+
+async def test_toggle_skill_callback(dispatcher):
+    start = IncomingCommand(user_id="u1", platform="telegram", chat_id="C1", command="start")
+    await dispatcher.dispatch(start)
+
+    cb = IncomingCallback(
+        user_id="u1", platform="telegram", chat_id="C1",
+        action="toggle_skill", payload={"skill": "browser", "enabled": True},
+    )
+    result = await dispatcher.dispatch(cb)
+    assert any("browser" in r.text for r in result if isinstance(r, OutgoingMessage))
diff --git a/tests/core/test_protocol.py b/tests/core/test_protocol.py
new file mode 100644
index 0000000..bf5e82a
--- /dev/null
+++ b/tests/core/test_protocol.py
@@ -0,0 +1,42 @@
+# tests/core/test_protocol.py
+from datetime import datetime
+from core.protocol import (
+    Attachment, IncomingMessage, IncomingCommand, IncomingCallback,
+    OutgoingMessage, OutgoingUI, OutgoingTyping, OutgoingNotification,
+    UIButton, ChatContext, AuthFlow, ConfirmationRequest, SettingsAction, PaymentRequired,
+)
+
+
+def test_incoming_message_defaults():
+    msg = IncomingMessage(user_id="u1", platform="telegram", chat_id="C1", text="hi")
+    assert msg.attachments == []
+    assert msg.reply_to is None
+
+
+def test_attachment_audio():
+    a = Attachment(type="audio", filename="voice.ogg", mime_type="audio/ogg")
+    assert a.type == "audio"
+    assert a.url is None
+
+
+def test_incoming_command_defaults():
+    cmd = IncomingCommand(user_id="u1", platform="matrix", chat_id="C1", command="new")
+    assert cmd.args == []
+
+
+def test_outgoing_message_defaults():
+    msg = OutgoingMessage(chat_id="C1", text="hello")
+    assert msg.parse_mode == "plain"
+    assert msg.attachments == []
+
+
+def test_ui_button_defaults():
+    btn = UIButton(label="OK", action="confirm")
+    assert btn.style == "secondary"
+    assert btn.payload == {}
+
+
+def test_settings_action():
+    action = SettingsAction(action="toggle_skill", payload={"skill": "browser", "enabled": True})
+    assert action.action == "toggle_skill"
+    assert action.payload["skill"] == "browser"
diff --git a/tests/core/test_settings.py b/tests/core/test_settings.py
new file mode 100644
index 0000000..b491ab9
--- /dev/null
+++ b/tests/core/test_settings.py
@@ -0,0 +1,32 @@
+# tests/core/test_settings.py
+import pytest
+from core.settings import SettingsManager
+from core.store import InMemoryStore
+from core.protocol import SettingsAction
+from platform.mock import MockPlatformClient
+
+
+@pytest.fixture
+def mgr():
+    return SettingsManager(MockPlatformClient(), InMemoryStore())
+
+
+async def test_get_returns_defaults(mgr):
+    settings = await mgr.get("u1")
+    assert "web-search" in settings.skills
+
+
+async def test_apply_toggle_skill(mgr):
+    action = SettingsAction(action="toggle_skill", payload={"skill": "browser", "enabled": True})
+    await mgr.apply("u1", action)
+    settings = await mgr.get("u1")
+    assert settings.skills.get("browser") is True
+
+
+async def test_apply_invalidates_cache(mgr):
+    s1 = await mgr.get("u1")
+    initial = s1.skills.get("browser", False)
+    action = SettingsAction(action="toggle_skill", payload={"skill": "browser", "enabled": not initial})
+    await mgr.apply("u1", action)
+    s2 = await mgr.get("u1")
+    assert s2.skills.get("browser") == (not initial)
diff --git a/tests/core/test_store.py b/tests/core/test_store.py
new file mode 100644
index 0000000..2eb1fa2
--- /dev/null
+++ b/tests/core/test_store.py
@@ -0,0 +1,58 @@
+# tests/core/test_store.py
+from core.store import InMemoryStore, SQLiteStore
+
+
+async def test_inmemory_get_missing_returns_none():
+    store = InMemoryStore()
+    assert await store.get("missing") is None
+
+
+async def test_inmemory_set_and_get():
+    store = InMemoryStore()
+    await store.set("k", {"x": 1})
+    assert await store.get("k") == {"x": 1}
+
+
+async def test_inmemory_delete():
+    store = InMemoryStore()
+    await store.set("k", {"x": 1})
+    await store.delete("k")
+    assert await store.get("k") is None
+
+
+async def test_inmemory_keys_prefix():
+    store = InMemoryStore()
+    await store.set("chat:u1:C1", {"a": 1})
+    await store.set("chat:u1:C2", {"b": 2})
+    await store.set("auth:u1", {"c": 3})
+    keys = await store.keys("chat:u1:")
+    assert set(keys) == {"chat:u1:C1", "chat:u1:C2"}
+
+
+async def test_sqlite_set_and_get(tmp_path):
+    store = SQLiteStore(str(tmp_path / "test.db"))
+    await store.set("k", {"hello": "world"})
+    assert await store.get("k") == {"hello": "world"}
+
+
+async def test_sqlite_overwrite(tmp_path):
+    store = SQLiteStore(str(tmp_path / "test.db"))
+    await store.set("k", {"v": 1})
+    await store.set("k", {"v": 2})
+    assert await store.get("k") == {"v": 2}
+
+
+async def test_sqlite_delete(tmp_path):
+    store = SQLiteStore(str(tmp_path / "test.db"))
+    await store.set("k", {"v": 1})
+    await store.delete("k")
+    assert await store.get("k") is None
+
+
+async def test_sqlite_keys_prefix(tmp_path):
+    store = SQLiteStore(str(tmp_path / "test.db"))
+    await store.set("chat:u1:C1", {})
+    await store.set("chat:u1:C2", {})
+    await store.set("auth:u1", {})
+    keys = await store.keys("chat:u1:")
+    assert set(keys) == {"chat:u1:C1", "chat:u1:C2"}
diff --git a/tests/core/test_voice_slot.py b/tests/core/test_voice_slot.py
new file mode 100644
index 0000000..00cd976
--- /dev/null
+++ b/tests/core/test_voice_slot.py
@@ -0,0 +1,49 @@
+# tests/core/test_voice_slot.py
+import pytest
+from core.protocol import IncomingMessage, Attachment, OutgoingMessage
+from core.handlers.message import handle_message
+from core.store import InMemoryStore
+from core.auth import AuthManager
+from core.chat import ChatManager
+from core.settings import SettingsManager
+from platform.mock import MockPlatformClient
+
+
+@pytest.fixture
+def deps():
+    platform = MockPlatformClient()
+    store = InMemoryStore()
+    auth_mgr = AuthManager(platform, store)
+    return dict(
+        platform=platform,
+        chat_mgr=ChatManager(platform, store),
+        auth_mgr=auth_mgr,
+        settings_mgr=SettingsManager(platform, store),
+    )
+
+
+async def test_voice_message_returns_stub(deps):
+    await deps["auth_mgr"].confirm("u1")
+    msg = IncomingMessage(
+        user_id="u1", platform="telegram", chat_id="C1", text="",
+        attachments=[Attachment(type="audio", filename="voice.ogg")],
+    )
+    result = await handle_message(event=msg, **deps)
+    assert len(result) == 1
+    assert isinstance(result[0], OutgoingMessage)
+    assert "голосов" in result[0].text.lower()
+
+
+async def test_text_message_calls_platform(deps):
+    await deps["auth_mgr"].confirm("u1")
+    msg = IncomingMessage(user_id="u1", platform="telegram", chat_id="C1", text="Привет!")
+    result = await handle_message(event=msg, **deps)
+    texts = [r.text for r in result if isinstance(r, OutgoingMessage)]
+    assert any("[MOCK]" in t for t in texts)
+
+
+async def test_unauthenticated_user_gets_start_prompt(deps):
+    msg = IncomingMessage(user_id="new_user", platform="telegram", chat_id="C1", text="hello")
+    result = await handle_message(event=msg, **deps)
+    assert len(result) == 1
+    assert "/start" in result[0].text
diff --git a/tests/platform/test_mock.py b/tests/platform/test_mock.py
new file mode 100644
index 0000000..03771ae
--- /dev/null
+++ b/tests/platform/test_mock.py
@@ -0,0 +1,45 @@
+# tests/platform/test_mock.py
+from platform.mock import MockPlatformClient
+from platform.interface import User, MessageResponse, UserSettings
+from core.protocol import SettingsAction
+
+
+async def test_get_or_create_user_returns_user():
+    client = MockPlatformClient()
+    user = await client.get_or_create_user("12345", "telegram", "Иван")
+    assert isinstance(user, User)
+    assert user.external_id == "12345"
+    assert user.platform == "telegram"
+    assert user.is_new is True
+
+
+async def test_get_or_create_user_idempotent():
+    client = MockPlatformClient()
+    u1 = await client.get_or_create_user("42", "matrix")
+    u2 = await client.get_or_create_user("42", "matrix")
+    assert u1.user_id == u2.user_id
+    assert u2.is_new is False
+
+
+async def test_send_message_returns_response():
+    client = MockPlatformClient()
+    user = await client.get_or_create_user("u1", "telegram")
+    result = await client.send_message(user.user_id, "C1", "Привет!")
+    assert isinstance(result, MessageResponse)
+    assert result.finished is True
+    assert len(result.response) > 0
+
+
+async def test_get_settings_returns_defaults():
+    client = MockPlatformClient()
+    settings = await client.get_settings("usr-telegram-42")
+    assert isinstance(settings, UserSettings)
+    assert "web-search" in settings.skills
+
+
+async def test_update_settings_toggle_skill():
+    client = MockPlatformClient()
+    action = SettingsAction(action="toggle_skill", payload={"skill": "browser", "enabled": True})
+    await client.update_settings("usr-1", action)
+    settings = await client.get_settings("usr-1")
+    assert settings.skills.get("browser") is True