feat: add thread info and status reads

tests/test_mcp.py

@@ -0,0 +1,51 @@
+import asyncio
+
+from agentmsgs.core.app import App
+from agentmsgs.mcp import server
+from agentmsgs.stores.memory import InMemoryStore
+
+
+def test_thread_info_and_status_tools():
+    app = App(store=InMemoryStore())
+    alice = app.get_or_create_agent("Alice")
+    bob = app.get_or_create_agent("Bob")
+    thread = app.create_thread(alice, bob)
+    latest = app.append(thread.id, alice, "hello")
+    server._app = app
+
+    info_result = asyncio.run(
+        server.mcp.call_tool("thread_info", {"thread_id": str(thread.id)})
+    )
+    status_result = asyncio.run(
+        server.mcp.call_tool(
+            "thread_status",
+            {"thread_id": str(thread.id), "agent_name": "Bob"},
+        )
+    )
+
+    assert info_result.structured_content["result"] == {
+        "id": str(thread.id),
+        "participants": [
+            {"id": str(alice.id), "name": "Alice"},
+            {"id": str(bob.id), "name": "Bob"},
+        ],
+        "created_at": thread.created_at.isoformat(),
+        "message_count": 1,
+        "latest_message": {
+            "id": str(latest.id),
+            "seq": latest.seq,
+            "sender": latest.sender.name,
+            "content": latest.content,
+            "ts": latest.ts.isoformat(),
+        },
+    }
+    assert status_result.structured_content["result"] == {
+        "thread_id": str(thread.id),
+        "agent": {"id": str(bob.id), "name": bob.name},
+        "cursor_seq": 0,
+        "latest_seq": 1,
+        "unread_count": 1,
+        "unread_from_others_count": 1,
+        "has_unread": True,
+        "has_unread_from_others": True,
+    }