Prompt Fable 5 right in the next 5 minutes. Six rules, each with copy-paste lines for your prompts and your CLAUDE.md files. Fable 5 costs double Opus ($10/M input, $50/M output), so every rule here saves you real money.
How to use this: skim the 6 rules, copy the lines that fit your setup, and paste the CLAUDE.md blocks into your system files so you stop re-typing them in every prompt. Source of truth: Anthropic's official guide: Prompting Claude Fable 5
Rule 1: Give it the why
Fable does better when it understands your intent, not just your instruction. Context lets it connect the task to the right information instead of guessing what you meant.