Claude Fable 5 Guide: 8 Prompt Patterns for Unknowns
xiaohu · x · 2026-07-07
At the AI Engineer World's Fair, @trq212 from the Claude Code team presented "A Field Guide to Fable," detailing 8 copy-paste prompt patterns centered on "finding the unknowns." Organized into pre-action, mid-action, and post-action phases, each pattern includes ready-to-use bilingual prompts.
He also shared a counterintuitive insight: Claude Code's system prompt was recently slashed by 80%. Examples can actually constrain newer models, signaling a shift in prompt engineering from "giving constraints" to "providing context."
Related event: Anthropic Engineer Shares Claude Code Practical Guide(2 posts)→
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