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01 · Context Quality

Prompt Hygiene

The practice of keeping prompts clean, structured, and free of accumulated noise. Preventive maintenance against Context Debt.

Prompt Hygiene is the discipline, not the state. Where Context Clarity describes what a good prompt looks like, Prompt Hygiene describes the practice of maintaining it. It means regularly auditing system prompts for outdated instructions, removing contradictory guidelines, trimming conversation history to what's relevant, and structuring context so the model can parse it efficiently. Teams that practice Prompt Hygiene avoid Context Debt before it accumulates rather than paying it down after it causes problems.

Example
A team schedules a monthly "prompt audit" where they review their system prompts and agent configurations. During one audit, they discover that a 3,200-token system prompt contains 800 tokens of instructions for a feature they removed two months ago, plus duplicate formatting guidelines added by two different engineers. They trim it to 2,100 tokens, resolve the contradictions, and see a measurable drop in token cost per task. The audit took 20 minutes; the savings compound across every future interaction.

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