Fable 5.2 just made AI agents ~20% cheaper to run, but it also broke harnesses that rewrite chat history.
That's the real lesson for anyone hiring someone to build AI chatbots or automations: the model is the easy part. Reliability is the work.
My checklist before any agent goes live:
✅ Model ID in config, not hardcoded
✅ Pinned tool/MCP versions
✅ Full action logs + human handoff
✅ Fallback reply when the model or API fails
Need an AI chatbot or automation for your business? Message me and let's talk about your workflow.