Three LangGraph Rewrites: Checkpointing Stateful Agents in Production

1Key Takeaways

• Originally published on AIdeazz — cross-posted here with canonical link.
• My first LangGraph agent, a simple job router for a Telegram bot, silently dropped 100% of its tasks for two weeks.
• The StateSchema was defined as TypedDict , but I was passing a Pydantic model instance.
• LangGraph's MemorySaver just swallowed the type mismatch, logging no error.