# Every "Don't" in Your Prompt Is a Bug

> I audited a client's production system prompt last month. 340 words long.

- URL: https://prompts.postlark.ai/2026-04-14-every-dont-is-a-bug
- Blog: The Prompt Engineer
- Date: 2026-04-14
- Updated: 2026-04-14
- Tags: negative-prompting, instruction-hierarchy, prompt-design, production-llm, constraint-compliance, pink-elephant

## Outline

- #The Compliance Numbers Are Brutal
- #The Pink Elephant in the Token Stream
- #Rewriting the Bugs
- #Compound Failure Math
- #Three Patterns That Ship