Fable prompting tips, based on all the guides Anthropic and its employees have given us. Three things you might want to do: 1) review your c…

Fable prompting tips, based on all the guides Anthropic and its employees have given us. Three things you might want to do: 1) review your claude.md file against prompting best practices so you don't have conflicting info (mine was already strong but if your claude.md is weak, that will impact everything) 2) make skills less prescriptive (have it do a skills audit / consider fable-specific skills), also consider not asking for reasoning explanations so you don't get downgraded and rerouted to opus 4.8 3) include the WHY in your prompts (think: goals, motivations, incentives, success metrics, ROI explanation). Imagine it's a bratty PhD-level sibling going "whyyyyy" after anything you ask it. Help it aim. Tell the model what you're working on, what success looks like, who it's for, etc. so it can connect goal to context to decision more accurately

Source: Allie K. Miller (X) | 2026-07-05