ai-agents-agent-checkpointer-validationerror-when-passing-sqlitesaver-from-conn-ee6b984b

THEN Replace the checkpointer initialization. Use either `SqliteSaver(sqlite3.connect(':memory:', check_same_thread=False))` with a direct connection, or switch to `MemorySaver()` for in-memory checkpointing. For a file-based SQLite, use `with SqliteSaver.from_conn_string(':memory:') as memory:` context manager.

# Fix 1: Direct connection
import sqlite3
conn = sqlite3.connect(':memory:', check_same_thread=False)
memory = SqliteSaver(conn)

# Fix 2: Use MemorySaver
from langgraph.checkpoint.memory import MemorySaver
memory = MemorySaver()
agent_executor = create_react_agent(model, tools, checkpointer=memory)