From 5782001d3dcb320298a2e3581a4d5a9085588256 Mon Sep 17 00:00:00 2001
From: Mikhail Putilovskij <mputilovskij@gmail.com>
Date: Sun, 19 Apr 2026 16:52:43 +0300
Subject: [PATCH] fix: preserve matrix room metadata when setting platform chat
 id

---
 adapter/matrix/store.py            |  2 +-
 tests/adapter/matrix/test_store.py | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/adapter/matrix/store.py b/adapter/matrix/store.py
index 34532a6..5ebb61a 100644
--- a/adapter/matrix/store.py
+++ b/adapter/matrix/store.py
@@ -27,7 +27,7 @@ async def get_platform_chat_id(store: StateStore, room_id: str) -> str | None:
 async def set_platform_chat_id(
     store: StateStore, room_id: str, platform_chat_id: str
 ) -> None:
-    meta = await get_room_meta(store, room_id) or {}
+    meta = dict(await get_room_meta(store, room_id) or {})
     meta["platform_chat_id"] = platform_chat_id
     await set_room_meta(store, room_id, meta)
 
diff --git a/tests/adapter/matrix/test_store.py b/tests/adapter/matrix/test_store.py
index 6be84c4..9fcd2a2 100644
--- a/tests/adapter/matrix/test_store.py
+++ b/tests/adapter/matrix/test_store.py
@@ -50,11 +50,20 @@ async def test_room_meta_roundtrip_with_platform_chat_id(store: InMemoryStore):
 
 
 async def test_platform_chat_id_helpers_roundtrip(store: InMemoryStore):
+    meta = {
+        "chat_id": "C1",
+        "matrix_user_id": "@alice:example.org",
+        "display_name": "Research",
+    }
+    await set_room_meta(store, "!r:m.org", meta)
     await set_platform_chat_id(store, "!r:m.org", "chat-platform-1")
 
     assert await get_platform_chat_id(store, "!r:m.org") == "chat-platform-1"
     assert await get_room_meta(store, "!r:m.org") == {
-        "platform_chat_id": "chat-platform-1"
+        "chat_id": "C1",
+        "matrix_user_id": "@alice:example.org",
+        "display_name": "Research",
+        "platform_chat_id": "chat-platform-1",
     }