LangGraph Checkpointing: Three Rewrites to Production Stability

1Key Takeaways

• Originally published on AIdeazz — cross-posted here with canonical link.
• My first LangGraph agent silently discarded every job for weeks.
• The agent was supposed to process incoming Telegram messages, enrich them with external data, and then route them to a specific LLM (Groq for fast, simple tasks; Claude for complex reasoning).
• Instead, it would receive a message, acknowledge it, and then… nothing.