Developers should freeze agent workflows when switching AI models

1. Isolate your AI model by freezing the exact instruction or skill version before running a comparison test.
2. Keep the input packet, data timestamp, available tools, and tool permissions completely identical across tests.
3. Maintain the exact same memory, prior conversation state, evaluator, retry rules, and stopping conditions.
4. Structure your agent architecture into separate layers for models, skills, plugins, and accounts to simplify testing.