Explain Why: The Claude Prompt Motivation Rule

Claude generalizes edge-case rules more reliably when you provide context and motivation explaining why a constraint is required rather than issuing a bare prohibition. Anthropic's documentation notes that explaining why a punctuation mark breaks a downstream system helps Claude generalize your intent across edge cases.

Write a 60-second onboarding script for our mobile app. Constraint: Never use ellipses (...), em-dashes, or parenthetical asides, because this text will be fed directly into a text-to-speech (TTS) engine that cannot pronounce them properly.